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-rw-r--r--drivers/rtc/Kconfig71
-rw-r--r--drivers/rtc/Makefile6
-rw-r--r--drivers/rtc/rtc-at91rm9200.c4
-rw-r--r--drivers/rtc/rtc-bq4802.c230
-rw-r--r--drivers/rtc/rtc-cmos.c127
-rw-r--r--drivers/rtc/rtc-dev.c27
-rw-r--r--drivers/rtc/rtc-ds1286.c410
-rw-r--r--drivers/rtc/rtc-ds1307.c308
-rw-r--r--drivers/rtc/rtc-ds1374.c21
-rw-r--r--drivers/rtc/rtc-ds1511.c13
-rw-r--r--drivers/rtc/rtc-ds1553.c12
-rw-r--r--drivers/rtc/rtc-ds1672.c114
-rw-r--r--drivers/rtc/rtc-ds3234.c290
-rw-r--r--drivers/rtc/rtc-m41t80.c43
-rw-r--r--drivers/rtc/rtc-m48t35.c235
-rw-r--r--drivers/rtc/rtc-m48t59.c68
-rw-r--r--drivers/rtc/rtc-max6900.c223
-rw-r--r--drivers/rtc/rtc-pcf8563.c58
-rw-r--r--drivers/rtc/rtc-pl030.c11
-rw-r--r--drivers/rtc/rtc-pl031.c14
-rw-r--r--drivers/rtc/rtc-rs5c372.c228
-rw-r--r--drivers/rtc/rtc-sh.c7
-rw-r--r--drivers/rtc/rtc-starfire.c120
-rw-r--r--drivers/rtc/rtc-stk17ta8.c12
-rw-r--r--drivers/rtc/rtc-sun4v.c153
25 files changed, 2285 insertions, 520 deletions
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 9a9755c92fad..f660ef3e5b29 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -220,22 +220,22 @@ config RTC_DRV_PCF8583
220 will be called rtc-pcf8583. 220 will be called rtc-pcf8583.
221 221
222config RTC_DRV_M41T80 222config RTC_DRV_M41T80
223 tristate "ST M41T80/81/82/83/84/85/87" 223 tristate "ST M41T65/M41T80/81/82/83/84/85/87"
224 help 224 help
225 If you say Y here you will get support for the 225 If you say Y here you will get support for the ST M41T60
226 ST M41T80 RTC chips series. Currently following chips are 226 and M41T80 RTC chips series. Currently, the following chips are
227 supported: M41T80, M41T81, M41T82, M41T83, M41ST84, M41ST85 227 supported: M41T65, M41T80, M41T81, M41T82, M41T83, M41ST84,
228 and M41ST87. 228 M41ST85, and M41ST87.
229 229
230 This driver can also be built as a module. If so, the module 230 This driver can also be built as a module. If so, the module
231 will be called rtc-m41t80. 231 will be called rtc-m41t80.
232 232
233config RTC_DRV_M41T80_WDT 233config RTC_DRV_M41T80_WDT
234 bool "ST M41T80 series RTC watchdog timer" 234 bool "ST M41T65/M41T80 series RTC watchdog timer"
235 depends on RTC_DRV_M41T80 235 depends on RTC_DRV_M41T80
236 help 236 help
237 If you say Y here you will get support for the 237 If you say Y here you will get support for the
238 watchdog timer in ST M41T80 RTC chips series. 238 watchdog timer in the ST M41T60 and M41T80 RTC chips series.
239 239
240config RTC_DRV_TWL92330 240config RTC_DRV_TWL92330
241 boolean "TI TWL92330/Menelaus" 241 boolean "TI TWL92330/Menelaus"
@@ -319,6 +319,15 @@ config RTC_DRV_RS5C348
319 This driver can also be built as a module. If so, the module 319 This driver can also be built as a module. If so, the module
320 will be called rtc-rs5c348. 320 will be called rtc-rs5c348.
321 321
322config RTC_DRV_DS3234
323 tristate "Maxim/Dallas DS3234"
324 help
325 If you say yes here you get support for the
326 Maxim/Dallas DS3234 SPI RTC chip.
327
328 This driver can also be built as a module. If so, the module
329 will be called rtc-ds3234.
330
322endif # SPI_MASTER 331endif # SPI_MASTER
323 332
324comment "Platform RTC drivers" 333comment "Platform RTC drivers"
@@ -329,7 +338,7 @@ comment "Platform RTC drivers"
329 338
330config RTC_DRV_CMOS 339config RTC_DRV_CMOS
331 tristate "PC-style 'CMOS'" 340 tristate "PC-style 'CMOS'"
332 depends on X86 || ALPHA || ARM || M32R || ATARI || PPC || MIPS 341 depends on X86 || ALPHA || ARM || M32R || ATARI || PPC || MIPS || SPARC64
333 default y if X86 342 default y if X86
334 help 343 help
335 Say "yes" here to get direct support for the real time clock 344 Say "yes" here to get direct support for the real time clock
@@ -352,6 +361,11 @@ config RTC_DRV_DS1216
352 help 361 help
353 If you say yes here you get support for the Dallas DS1216 RTC chips. 362 If you say yes here you get support for the Dallas DS1216 RTC chips.
354 363
364config RTC_DRV_DS1286
365 tristate "Dallas DS1286"
366 help
367 If you say yes here you get support for the Dallas DS1286 RTC chips.
368
355config RTC_DRV_DS1302 369config RTC_DRV_DS1302
356 tristate "Dallas DS1302" 370 tristate "Dallas DS1302"
357 depends on SH_SECUREEDGE5410 371 depends on SH_SECUREEDGE5410
@@ -405,15 +419,36 @@ config RTC_DRV_M48T86
405 This driver can also be built as a module. If so, the module 419 This driver can also be built as a module. If so, the module
406 will be called rtc-m48t86. 420 will be called rtc-m48t86.
407 421
422config RTC_DRV_M48T35
423 tristate "ST M48T35"
424 help
425 If you say Y here you will get support for the
426 ST M48T35 RTC chip.
427
428 This driver can also be built as a module, if so, the module
429 will be called "rtc-m48t35".
430
408config RTC_DRV_M48T59 431config RTC_DRV_M48T59
409 tristate "ST M48T59" 432 tristate "ST M48T59/M48T08/M48T02"
410 help 433 help
411 If you say Y here you will get support for the 434 If you say Y here you will get support for the
412 ST M48T59 RTC chip. 435 ST M48T59 RTC chip and compatible ST M48T08 and M48T02.
436
437 These chips are usually found in Sun SPARC and UltraSPARC
438 workstations.
413 439
414 This driver can also be built as a module, if so, the module 440 This driver can also be built as a module, if so, the module
415 will be called "rtc-m48t59". 441 will be called "rtc-m48t59".
416 442
443config RTC_DRV_BQ4802
444 tristate "TI BQ4802"
445 help
446 If you say Y here you will get support for the TI
447 BQ4802 RTC chip.
448
449 This driver can also be built as a module. If so, the module
450 will be called rtc-bq4802.
451
417config RTC_DRV_V3020 452config RTC_DRV_V3020
418 tristate "EM Microelectronic V3020" 453 tristate "EM Microelectronic V3020"
419 help 454 help
@@ -577,10 +612,24 @@ config RTC_DRV_RS5C313
577 612
578config RTC_DRV_PPC 613config RTC_DRV_PPC
579 tristate "PowerPC machine dependent RTC support" 614 tristate "PowerPC machine dependent RTC support"
580 depends on PPC_MERGE 615 depends on PPC
581 help 616 help
582 The PowerPC kernel has machine-specific functions for accessing 617 The PowerPC kernel has machine-specific functions for accessing
583 the RTC. This exposes that functionality through the generic RTC 618 the RTC. This exposes that functionality through the generic RTC
584 class. 619 class.
585 620
621config RTC_DRV_SUN4V
622 bool "SUN4V Hypervisor RTC"
623 depends on SPARC64
624 help
625 If you say Y here you will get support for the Hypervisor
626 based RTC on SUN4V systems.
627
628config RTC_DRV_STARFIRE
629 bool "Starfire RTC"
630 depends on SPARC64
631 help
632 If you say Y here you will get support for the RTC found on
633 Starfire systems.
634
586endif # RTC_CLASS 635endif # RTC_CLASS
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index 18622ef84cab..d05928b3ca94 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -23,6 +23,7 @@ obj-$(CONFIG_RTC_DRV_AT91SAM9) += rtc-at91sam9.o
23obj-$(CONFIG_RTC_DRV_BFIN) += rtc-bfin.o 23obj-$(CONFIG_RTC_DRV_BFIN) += rtc-bfin.o
24obj-$(CONFIG_RTC_DRV_CMOS) += rtc-cmos.o 24obj-$(CONFIG_RTC_DRV_CMOS) += rtc-cmos.o
25obj-$(CONFIG_RTC_DRV_DS1216) += rtc-ds1216.o 25obj-$(CONFIG_RTC_DRV_DS1216) += rtc-ds1216.o
26obj-$(CONFIG_RTC_DRV_DS1286) += rtc-ds1286.o
26obj-$(CONFIG_RTC_DRV_DS1302) += rtc-ds1302.o 27obj-$(CONFIG_RTC_DRV_DS1302) += rtc-ds1302.o
27obj-$(CONFIG_RTC_DRV_DS1305) += rtc-ds1305.o 28obj-$(CONFIG_RTC_DRV_DS1305) += rtc-ds1305.o
28obj-$(CONFIG_RTC_DRV_DS1307) += rtc-ds1307.o 29obj-$(CONFIG_RTC_DRV_DS1307) += rtc-ds1307.o
@@ -31,13 +32,18 @@ obj-$(CONFIG_RTC_DRV_DS1511) += rtc-ds1511.o
31obj-$(CONFIG_RTC_DRV_DS1553) += rtc-ds1553.o 32obj-$(CONFIG_RTC_DRV_DS1553) += rtc-ds1553.o
32obj-$(CONFIG_RTC_DRV_DS1672) += rtc-ds1672.o 33obj-$(CONFIG_RTC_DRV_DS1672) += rtc-ds1672.o
33obj-$(CONFIG_RTC_DRV_DS1742) += rtc-ds1742.o 34obj-$(CONFIG_RTC_DRV_DS1742) += rtc-ds1742.o
35obj-$(CONFIG_RTC_DRV_DS3234) += rtc-ds3234.o
34obj-$(CONFIG_RTC_DRV_EP93XX) += rtc-ep93xx.o 36obj-$(CONFIG_RTC_DRV_EP93XX) += rtc-ep93xx.o
35obj-$(CONFIG_RTC_DRV_FM3130) += rtc-fm3130.o 37obj-$(CONFIG_RTC_DRV_FM3130) += rtc-fm3130.o
36obj-$(CONFIG_RTC_DRV_ISL1208) += rtc-isl1208.o 38obj-$(CONFIG_RTC_DRV_ISL1208) += rtc-isl1208.o
37obj-$(CONFIG_RTC_DRV_M41T80) += rtc-m41t80.o 39obj-$(CONFIG_RTC_DRV_M41T80) += rtc-m41t80.o
38obj-$(CONFIG_RTC_DRV_M41T94) += rtc-m41t94.o 40obj-$(CONFIG_RTC_DRV_M41T94) += rtc-m41t94.o
41obj-$(CONFIG_RTC_DRV_M48T35) += rtc-m48t35.o
39obj-$(CONFIG_RTC_DRV_M48T59) += rtc-m48t59.o 42obj-$(CONFIG_RTC_DRV_M48T59) += rtc-m48t59.o
40obj-$(CONFIG_RTC_DRV_M48T86) += rtc-m48t86.o 43obj-$(CONFIG_RTC_DRV_M48T86) += rtc-m48t86.o
44obj-$(CONFIG_RTC_DRV_BQ4802) += rtc-bq4802.o
45obj-$(CONFIG_RTC_DRV_SUN4V) += rtc-sun4v.o
46obj-$(CONFIG_RTC_DRV_STARFIRE) += rtc-starfire.o
41obj-$(CONFIG_RTC_DRV_MAX6900) += rtc-max6900.o 47obj-$(CONFIG_RTC_DRV_MAX6900) += rtc-max6900.o
42obj-$(CONFIG_RTC_DRV_MAX6902) += rtc-max6902.o 48obj-$(CONFIG_RTC_DRV_MAX6902) += rtc-max6902.o
43obj-$(CONFIG_RTC_DRV_OMAP) += rtc-omap.o 49obj-$(CONFIG_RTC_DRV_OMAP) += rtc-omap.o
diff --git a/drivers/rtc/rtc-at91rm9200.c b/drivers/rtc/rtc-at91rm9200.c
index 4e888cc8be5b..37082616482b 100644
--- a/drivers/rtc/rtc-at91rm9200.c
+++ b/drivers/rtc/rtc-at91rm9200.c
@@ -29,10 +29,10 @@
29#include <linux/completion.h> 29#include <linux/completion.h>
30 30
31#include <asm/uaccess.h> 31#include <asm/uaccess.h>
32
32#include <mach/at91_rtc.h> 33#include <mach/at91_rtc.h>
33 34
34 35
35#define AT91_RTC_FREQ 1
36#define AT91_RTC_EPOCH 1900UL /* just like arch/arm/common/rtctime.c */ 36#define AT91_RTC_EPOCH 1900UL /* just like arch/arm/common/rtctime.c */
37 37
38static DECLARE_COMPLETION(at91_rtc_updated); 38static DECLARE_COMPLETION(at91_rtc_updated);
@@ -228,8 +228,6 @@ static int at91_rtc_proc(struct device *dev, struct seq_file *seq)
228 (imr & AT91_RTC_ACKUPD) ? "yes" : "no"); 228 (imr & AT91_RTC_ACKUPD) ? "yes" : "no");
229 seq_printf(seq, "periodic_IRQ\t: %s\n", 229 seq_printf(seq, "periodic_IRQ\t: %s\n",
230 (imr & AT91_RTC_SECEV) ? "yes" : "no"); 230 (imr & AT91_RTC_SECEV) ? "yes" : "no");
231 seq_printf(seq, "periodic_freq\t: %ld\n",
232 (unsigned long) AT91_RTC_FREQ);
233 231
234 return 0; 232 return 0;
235} 233}
diff --git a/drivers/rtc/rtc-bq4802.c b/drivers/rtc/rtc-bq4802.c
new file mode 100644
index 000000000000..189a018bdf34
--- /dev/null
+++ b/drivers/rtc/rtc-bq4802.c
@@ -0,0 +1,230 @@
1/* rtc-bq4802.c: TI BQ4802 RTC driver.
2 *
3 * Copyright (C) 2008 David S. Miller <davem@davemloft.net>
4 */
5
6#include <linux/kernel.h>
7#include <linux/module.h>
8#include <linux/init.h>
9#include <linux/io.h>
10#include <linux/platform_device.h>
11#include <linux/rtc.h>
12#include <linux/bcd.h>
13
14MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
15MODULE_DESCRIPTION("TI BQ4802 RTC driver");
16MODULE_LICENSE("GPL");
17
18struct bq4802 {
19 void __iomem *regs;
20 unsigned long ioport;
21 struct rtc_device *rtc;
22 spinlock_t lock;
23 struct resource *r;
24 u8 (*read)(struct bq4802 *, int);
25 void (*write)(struct bq4802 *, int, u8);
26};
27
28static u8 bq4802_read_io(struct bq4802 *p, int off)
29{
30 return inb(p->ioport + off);
31}
32
33static void bq4802_write_io(struct bq4802 *p, int off, u8 val)
34{
35 outb(val, p->ioport + off);
36}
37
38static u8 bq4802_read_mem(struct bq4802 *p, int off)
39{
40 return readb(p->regs + off);
41}
42
43static void bq4802_write_mem(struct bq4802 *p, int off, u8 val)
44{
45 writeb(val, p->regs + off);
46}
47
48static int bq4802_read_time(struct device *dev, struct rtc_time *tm)
49{
50 struct platform_device *pdev = to_platform_device(dev);
51 struct bq4802 *p = platform_get_drvdata(pdev);
52 unsigned long flags;
53 unsigned int century;
54 u8 val;
55
56 spin_lock_irqsave(&p->lock, flags);
57
58 val = p->read(p, 0x0e);
59 p->write(p, 0xe, val | 0x08);
60
61 tm->tm_sec = p->read(p, 0x00);
62 tm->tm_min = p->read(p, 0x02);
63 tm->tm_hour = p->read(p, 0x04);
64 tm->tm_mday = p->read(p, 0x06);
65 tm->tm_mon = p->read(p, 0x09);
66 tm->tm_year = p->read(p, 0x0a);
67 tm->tm_wday = p->read(p, 0x08);
68 century = p->read(p, 0x0f);
69
70 p->write(p, 0x0e, val);
71
72 spin_unlock_irqrestore(&p->lock, flags);
73
74 BCD_TO_BIN(tm->tm_sec);
75 BCD_TO_BIN(tm->tm_min);
76 BCD_TO_BIN(tm->tm_hour);
77 BCD_TO_BIN(tm->tm_mday);
78 BCD_TO_BIN(tm->tm_mon);
79 BCD_TO_BIN(tm->tm_year);
80 BCD_TO_BIN(tm->tm_wday);
81 BCD_TO_BIN(century);
82
83 tm->tm_year += (century * 100);
84 tm->tm_year -= 1900;
85
86 tm->tm_mon--;
87
88 return 0;
89}
90
91static int bq4802_set_time(struct device *dev, struct rtc_time *tm)
92{
93 struct platform_device *pdev = to_platform_device(dev);
94 struct bq4802 *p = platform_get_drvdata(pdev);
95 u8 sec, min, hrs, day, mon, yrs, century, val;
96 unsigned long flags;
97 unsigned int year;
98
99 year = tm->tm_year + 1900;
100 century = year / 100;
101 yrs = year % 100;
102
103 mon = tm->tm_mon + 1; /* tm_mon starts at zero */
104 day = tm->tm_mday;
105 hrs = tm->tm_hour;
106 min = tm->tm_min;
107 sec = tm->tm_sec;
108
109 BIN_TO_BCD(sec);
110 BIN_TO_BCD(min);
111 BIN_TO_BCD(hrs);
112 BIN_TO_BCD(day);
113 BIN_TO_BCD(mon);
114 BIN_TO_BCD(yrs);
115 BIN_TO_BCD(century);
116
117 spin_lock_irqsave(&p->lock, flags);
118
119 val = p->read(p, 0x0e);
120 p->write(p, 0x0e, val | 0x08);
121
122 p->write(p, 0x00, sec);
123 p->write(p, 0x02, min);
124 p->write(p, 0x04, hrs);
125 p->write(p, 0x06, day);
126 p->write(p, 0x09, mon);
127 p->write(p, 0x0a, yrs);
128 p->write(p, 0x0f, century);
129
130 p->write(p, 0x0e, val);
131
132 spin_unlock_irqrestore(&p->lock, flags);
133
134 return 0;
135}
136
137static const struct rtc_class_ops bq4802_ops = {
138 .read_time = bq4802_read_time,
139 .set_time = bq4802_set_time,
140};
141
142static int __devinit bq4802_probe(struct platform_device *pdev)
143{
144 struct bq4802 *p = kzalloc(sizeof(*p), GFP_KERNEL);
145 int err = -ENOMEM;
146
147 if (!p)
148 goto out;
149
150 spin_lock_init(&p->lock);
151
152 p->r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
153 if (!p->r) {
154 p->r = platform_get_resource(pdev, IORESOURCE_IO, 0);
155 err = -EINVAL;
156 if (!p->r)
157 goto out_free;
158 }
159 if (p->r->flags & IORESOURCE_IO) {
160 p->ioport = p->r->start;
161 p->read = bq4802_read_io;
162 p->write = bq4802_write_io;
163 } else if (p->r->flags & IORESOURCE_MEM) {
164 p->regs = ioremap(p->r->start, resource_size(p->r));
165 p->read = bq4802_read_mem;
166 p->write = bq4802_write_mem;
167 } else {
168 err = -EINVAL;
169 goto out_free;
170 }
171
172 p->rtc = rtc_device_register("bq4802", &pdev->dev,
173 &bq4802_ops, THIS_MODULE);
174 if (IS_ERR(p->rtc)) {
175 err = PTR_ERR(p->rtc);
176 goto out_iounmap;
177 }
178
179 platform_set_drvdata(pdev, p);
180 err = 0;
181out:
182 return err;
183
184out_iounmap:
185 if (p->r->flags & IORESOURCE_MEM)
186 iounmap(p->regs);
187out_free:
188 kfree(p);
189 goto out;
190}
191
192static int __devexit bq4802_remove(struct platform_device *pdev)
193{
194 struct bq4802 *p = platform_get_drvdata(pdev);
195
196 rtc_device_unregister(p->rtc);
197 if (p->r->flags & IORESOURCE_MEM)
198 iounmap(p->regs);
199
200 platform_set_drvdata(pdev, NULL);
201
202 kfree(p);
203
204 return 0;
205}
206
207/* work with hotplug and coldplug */
208MODULE_ALIAS("platform:rtc-bq4802");
209
210static struct platform_driver bq4802_driver = {
211 .driver = {
212 .name = "rtc-bq4802",
213 .owner = THIS_MODULE,
214 },
215 .probe = bq4802_probe,
216 .remove = __devexit_p(bq4802_remove),
217};
218
219static int __init bq4802_init(void)
220{
221 return platform_driver_register(&bq4802_driver);
222}
223
224static void __exit bq4802_exit(void)
225{
226 platform_driver_unregister(&bq4802_driver);
227}
228
229module_init(bq4802_init);
230module_exit(bq4802_exit);
diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c
index b184367637d0..963ad0b6a4e9 100644
--- a/drivers/rtc/rtc-cmos.c
+++ b/drivers/rtc/rtc-cmos.c
@@ -636,7 +636,7 @@ cmos_do_probe(struct device *dev, struct resource *ports, int rtc_irq)
636 */ 636 */
637#if defined(CONFIG_ATARI) 637#if defined(CONFIG_ATARI)
638 address_space = 64; 638 address_space = 64;
639#elif defined(__i386__) || defined(__x86_64__) || defined(__arm__) 639#elif defined(__i386__) || defined(__x86_64__) || defined(__arm__) || defined(__sparc__)
640 address_space = 128; 640 address_space = 128;
641#else 641#else
642#warning Assuming 128 bytes of RTC+NVRAM address space, not 64 bytes. 642#warning Assuming 128 bytes of RTC+NVRAM address space, not 64 bytes.
@@ -699,7 +699,8 @@ cmos_do_probe(struct device *dev, struct resource *ports, int rtc_irq)
699 /* FIXME teach the alarm code how to handle binary mode; 699 /* FIXME teach the alarm code how to handle binary mode;
700 * <asm-generic/rtc.h> doesn't know 12-hour mode either. 700 * <asm-generic/rtc.h> doesn't know 12-hour mode either.
701 */ 701 */
702 if (!(rtc_control & RTC_24H) || (rtc_control & (RTC_DM_BINARY))) { 702 if (is_valid_irq(rtc_irq) &&
703 (!(rtc_control & RTC_24H) || (rtc_control & (RTC_DM_BINARY)))) {
703 dev_dbg(dev, "only 24-hr BCD mode supported\n"); 704 dev_dbg(dev, "only 24-hr BCD mode supported\n");
704 retval = -ENXIO; 705 retval = -ENXIO;
705 goto cleanup1; 706 goto cleanup1;
@@ -912,6 +913,92 @@ static inline int cmos_poweroff(struct device *dev)
912 * predate even PNPBIOS should set up platform_bus devices. 913 * predate even PNPBIOS should set up platform_bus devices.
913 */ 914 */
914 915
916#ifdef CONFIG_ACPI
917
918#include <linux/acpi.h>
919
920#ifdef CONFIG_PM
921static u32 rtc_handler(void *context)
922{
923 acpi_clear_event(ACPI_EVENT_RTC);
924 acpi_disable_event(ACPI_EVENT_RTC, 0);
925 return ACPI_INTERRUPT_HANDLED;
926}
927
928static inline void rtc_wake_setup(void)
929{
930 acpi_install_fixed_event_handler(ACPI_EVENT_RTC, rtc_handler, NULL);
931 /*
932 * After the RTC handler is installed, the Fixed_RTC event should
933 * be disabled. Only when the RTC alarm is set will it be enabled.
934 */
935 acpi_clear_event(ACPI_EVENT_RTC);
936 acpi_disable_event(ACPI_EVENT_RTC, 0);
937}
938
939static void rtc_wake_on(struct device *dev)
940{
941 acpi_clear_event(ACPI_EVENT_RTC);
942 acpi_enable_event(ACPI_EVENT_RTC, 0);
943}
944
945static void rtc_wake_off(struct device *dev)
946{
947 acpi_disable_event(ACPI_EVENT_RTC, 0);
948}
949#else
950#define rtc_wake_setup() do{}while(0)
951#define rtc_wake_on NULL
952#define rtc_wake_off NULL
953#endif
954
955/* Every ACPI platform has a mc146818 compatible "cmos rtc". Here we find
956 * its device node and pass extra config data. This helps its driver use
957 * capabilities that the now-obsolete mc146818 didn't have, and informs it
958 * that this board's RTC is wakeup-capable (per ACPI spec).
959 */
960static struct cmos_rtc_board_info acpi_rtc_info;
961
962static void __devinit
963cmos_wake_setup(struct device *dev)
964{
965 if (acpi_disabled)
966 return;
967
968 rtc_wake_setup();
969 acpi_rtc_info.wake_on = rtc_wake_on;
970 acpi_rtc_info.wake_off = rtc_wake_off;
971
972 /* workaround bug in some ACPI tables */
973 if (acpi_gbl_FADT.month_alarm && !acpi_gbl_FADT.day_alarm) {
974 dev_dbg(dev, "bogus FADT month_alarm (%d)\n",
975 acpi_gbl_FADT.month_alarm);
976 acpi_gbl_FADT.month_alarm = 0;
977 }
978
979 acpi_rtc_info.rtc_day_alarm = acpi_gbl_FADT.day_alarm;
980 acpi_rtc_info.rtc_mon_alarm = acpi_gbl_FADT.month_alarm;
981 acpi_rtc_info.rtc_century = acpi_gbl_FADT.century;
982
983 /* NOTE: S4_RTC_WAKE is NOT currently useful to Linux */
984 if (acpi_gbl_FADT.flags & ACPI_FADT_S4_RTC_WAKE)
985 dev_info(dev, "RTC can wake from S4\n");
986
987 dev->platform_data = &acpi_rtc_info;
988
989 /* RTC always wakes from S1/S2/S3, and often S4/STD */
990 device_init_wakeup(dev, 1);
991}
992
993#else
994
995static void __devinit
996cmos_wake_setup(struct device *dev)
997{
998}
999
1000#endif
1001
915#ifdef CONFIG_PNP 1002#ifdef CONFIG_PNP
916 1003
917#include <linux/pnp.h> 1004#include <linux/pnp.h>
@@ -919,6 +1006,8 @@ static inline int cmos_poweroff(struct device *dev)
919static int __devinit 1006static int __devinit
920cmos_pnp_probe(struct pnp_dev *pnp, const struct pnp_device_id *id) 1007cmos_pnp_probe(struct pnp_dev *pnp, const struct pnp_device_id *id)
921{ 1008{
1009 cmos_wake_setup(&pnp->dev);
1010
922 if (pnp_port_start(pnp,0) == 0x70 && !pnp_irq_valid(pnp,0)) 1011 if (pnp_port_start(pnp,0) == 0x70 && !pnp_irq_valid(pnp,0))
923 /* Some machines contain a PNP entry for the RTC, but 1012 /* Some machines contain a PNP entry for the RTC, but
924 * don't define the IRQ. It should always be safe to 1013 * don't define the IRQ. It should always be safe to
@@ -996,6 +1085,7 @@ static struct pnp_driver cmos_pnp_driver = {
996 1085
997static int __init cmos_platform_probe(struct platform_device *pdev) 1086static int __init cmos_platform_probe(struct platform_device *pdev)
998{ 1087{
1088 cmos_wake_setup(&pdev->dev);
999 return cmos_do_probe(&pdev->dev, 1089 return cmos_do_probe(&pdev->dev,
1000 platform_get_resource(pdev, IORESOURCE_IO, 0), 1090 platform_get_resource(pdev, IORESOURCE_IO, 0),
1001 platform_get_irq(pdev, 0)); 1091 platform_get_irq(pdev, 0));
@@ -1030,29 +1120,32 @@ static struct platform_driver cmos_platform_driver = {
1030 1120
1031static int __init cmos_init(void) 1121static int __init cmos_init(void)
1032{ 1122{
1123 int retval = 0;
1124
1033#ifdef CONFIG_PNP 1125#ifdef CONFIG_PNP
1034 if (pnp_platform_devices) 1126 pnp_register_driver(&cmos_pnp_driver);
1035 return pnp_register_driver(&cmos_pnp_driver); 1127#endif
1036 else 1128
1037 return platform_driver_probe(&cmos_platform_driver, 1129 if (!cmos_rtc.dev)
1038 cmos_platform_probe); 1130 retval = platform_driver_probe(&cmos_platform_driver,
1039#else 1131 cmos_platform_probe);
1040 return platform_driver_probe(&cmos_platform_driver, 1132
1041 cmos_platform_probe); 1133 if (retval == 0)
1042#endif /* CONFIG_PNP */ 1134 return 0;
1135
1136#ifdef CONFIG_PNP
1137 pnp_unregister_driver(&cmos_pnp_driver);
1138#endif
1139 return retval;
1043} 1140}
1044module_init(cmos_init); 1141module_init(cmos_init);
1045 1142
1046static void __exit cmos_exit(void) 1143static void __exit cmos_exit(void)
1047{ 1144{
1048#ifdef CONFIG_PNP 1145#ifdef CONFIG_PNP
1049 if (pnp_platform_devices) 1146 pnp_unregister_driver(&cmos_pnp_driver);
1050 pnp_unregister_driver(&cmos_pnp_driver); 1147#endif
1051 else
1052 platform_driver_unregister(&cmos_platform_driver);
1053#else
1054 platform_driver_unregister(&cmos_platform_driver); 1148 platform_driver_unregister(&cmos_platform_driver);
1055#endif /* CONFIG_PNP */
1056} 1149}
1057module_exit(cmos_exit); 1150module_exit(cmos_exit);
1058 1151
diff --git a/drivers/rtc/rtc-dev.c b/drivers/rtc/rtc-dev.c
index f118252f3a9f..079e9ed907e0 100644
--- a/drivers/rtc/rtc-dev.c
+++ b/drivers/rtc/rtc-dev.c
@@ -422,28 +422,37 @@ done:
422 return err; 422 return err;
423} 423}
424 424
425static int rtc_dev_fasync(int fd, struct file *file, int on)
426{
427 struct rtc_device *rtc = file->private_data;
428 return fasync_helper(fd, file, on, &rtc->async_queue);
429}
430
425static int rtc_dev_release(struct inode *inode, struct file *file) 431static int rtc_dev_release(struct inode *inode, struct file *file)
426{ 432{
427 struct rtc_device *rtc = file->private_data; 433 struct rtc_device *rtc = file->private_data;
428 434
429#ifdef CONFIG_RTC_INTF_DEV_UIE_EMUL 435 /* We shut down the repeating IRQs that userspace enabled,
430 clear_uie(rtc); 436 * since nothing is listening to them.
431#endif 437 * - Update (UIE) ... currently only managed through ioctls
438 * - Periodic (PIE) ... also used through rtc_*() interface calls
439 *
440 * Leave the alarm alone; it may be set to trigger a system wakeup
441 * later, or be used by kernel code, and is a one-shot event anyway.
442 */
443 rtc_dev_ioctl(file, RTC_UIE_OFF, 0);
432 rtc_irq_set_state(rtc, NULL, 0); 444 rtc_irq_set_state(rtc, NULL, 0);
433 445
434 if (rtc->ops->release) 446 if (rtc->ops->release)
435 rtc->ops->release(rtc->dev.parent); 447 rtc->ops->release(rtc->dev.parent);
436 448
449 if (file->f_flags & FASYNC)
450 rtc_dev_fasync(-1, file, 0);
451
437 clear_bit_unlock(RTC_DEV_BUSY, &rtc->flags); 452 clear_bit_unlock(RTC_DEV_BUSY, &rtc->flags);
438 return 0; 453 return 0;
439} 454}
440 455
441static int rtc_dev_fasync(int fd, struct file *file, int on)
442{
443 struct rtc_device *rtc = file->private_data;
444 return fasync_helper(fd, file, on, &rtc->async_queue);
445}
446
447static const struct file_operations rtc_dev_fops = { 456static const struct file_operations rtc_dev_fops = {
448 .owner = THIS_MODULE, 457 .owner = THIS_MODULE,
449 .llseek = no_llseek, 458 .llseek = no_llseek,
diff --git a/drivers/rtc/rtc-ds1286.c b/drivers/rtc/rtc-ds1286.c
new file mode 100644
index 000000000000..4fcb16bbff4a
--- /dev/null
+++ b/drivers/rtc/rtc-ds1286.c
@@ -0,0 +1,410 @@
1/*
2 * DS1286 Real Time Clock interface for Linux
3 *
4 * Copyright (C) 1998, 1999, 2000 Ralf Baechle
5 * Copyright (C) 2008 Thomas Bogendoerfer
6 *
7 * Based on code written by Paul Gortmaker.
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
13 */
14
15#include <linux/module.h>
16#include <linux/rtc.h>
17#include <linux/platform_device.h>
18#include <linux/bcd.h>
19#include <linux/ds1286.h>
20#include <linux/io.h>
21
22#define DRV_VERSION "1.0"
23
24struct ds1286_priv {
25 struct rtc_device *rtc;
26 u32 __iomem *rtcregs;
27 size_t size;
28 unsigned long baseaddr;
29 spinlock_t lock;
30};
31
32static inline u8 ds1286_rtc_read(struct ds1286_priv *priv, int reg)
33{
34 return __raw_readl(&priv->rtcregs[reg]) & 0xff;
35}
36
37static inline void ds1286_rtc_write(struct ds1286_priv *priv, u8 data, int reg)
38{
39 __raw_writel(data, &priv->rtcregs[reg]);
40}
41
42#ifdef CONFIG_RTC_INTF_DEV
43
44static int ds1286_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
45{
46 struct ds1286_priv *priv = dev_get_drvdata(dev);
47 unsigned long flags;
48 unsigned char val;
49
50 switch (cmd) {
51 case RTC_AIE_OFF:
52 /* Mask alarm int. enab. bit */
53 spin_lock_irqsave(&priv->lock, flags);
54 val = ds1286_rtc_read(priv, RTC_CMD);
55 val |= RTC_TDM;
56 ds1286_rtc_write(priv, val, RTC_CMD);
57 spin_unlock_irqrestore(&priv->lock, flags);
58 break;
59 case RTC_AIE_ON:
60 /* Allow alarm interrupts. */
61 spin_lock_irqsave(&priv->lock, flags);
62 val = ds1286_rtc_read(priv, RTC_CMD);
63 val &= ~RTC_TDM;
64 ds1286_rtc_write(priv, val, RTC_CMD);
65 spin_unlock_irqrestore(&priv->lock, flags);
66 break;
67 case RTC_WIE_OFF:
68 /* Mask watchdog int. enab. bit */
69 spin_lock_irqsave(&priv->lock, flags);
70 val = ds1286_rtc_read(priv, RTC_CMD);
71 val |= RTC_WAM;
72 ds1286_rtc_write(priv, val, RTC_CMD);
73 spin_unlock_irqrestore(&priv->lock, flags);
74 break;
75 case RTC_WIE_ON:
76 /* Allow watchdog interrupts. */
77 spin_lock_irqsave(&priv->lock, flags);
78 val = ds1286_rtc_read(priv, RTC_CMD);
79 val &= ~RTC_WAM;
80 ds1286_rtc_write(priv, val, RTC_CMD);
81 spin_unlock_irqrestore(&priv->lock, flags);
82 break;
83 default:
84 return -ENOIOCTLCMD;
85 }
86 return 0;
87}
88
89#else
90#define ds1286_ioctl NULL
91#endif
92
93#ifdef CONFIG_PROC_FS
94
95static int ds1286_proc(struct device *dev, struct seq_file *seq)
96{
97 struct ds1286_priv *priv = dev_get_drvdata(dev);
98 unsigned char month, cmd, amode;
99 const char *s;
100
101 month = ds1286_rtc_read(priv, RTC_MONTH);
102 seq_printf(seq,
103 "oscillator\t: %s\n"
104 "square_wave\t: %s\n",
105 (month & RTC_EOSC) ? "disabled" : "enabled",
106 (month & RTC_ESQW) ? "disabled" : "enabled");
107
108 amode = ((ds1286_rtc_read(priv, RTC_MINUTES_ALARM) & 0x80) >> 5) |
109 ((ds1286_rtc_read(priv, RTC_HOURS_ALARM) & 0x80) >> 6) |
110 ((ds1286_rtc_read(priv, RTC_DAY_ALARM) & 0x80) >> 7);
111 switch (amode) {
112 case 7:
113 s = "each minute";
114 break;
115 case 3:
116 s = "minutes match";
117 break;
118 case 1:
119 s = "hours and minutes match";
120 break;
121 case 0:
122 s = "days, hours and minutes match";
123 break;
124 default:
125 s = "invalid";
126 break;
127 }
128 seq_printf(seq, "alarm_mode\t: %s\n", s);
129
130 cmd = ds1286_rtc_read(priv, RTC_CMD);
131 seq_printf(seq,
132 "alarm_enable\t: %s\n"
133 "wdog_alarm\t: %s\n"
134 "alarm_mask\t: %s\n"
135 "wdog_alarm_mask\t: %s\n"
136 "interrupt_mode\t: %s\n"
137 "INTB_mode\t: %s_active\n"
138 "interrupt_pins\t: %s\n",
139 (cmd & RTC_TDF) ? "yes" : "no",
140 (cmd & RTC_WAF) ? "yes" : "no",
141 (cmd & RTC_TDM) ? "disabled" : "enabled",
142 (cmd & RTC_WAM) ? "disabled" : "enabled",
143 (cmd & RTC_PU_LVL) ? "pulse" : "level",
144 (cmd & RTC_IBH_LO) ? "low" : "high",
145 (cmd & RTC_IPSW) ? "unswapped" : "swapped");
146 return 0;
147}
148
149#else
150#define ds1286_proc NULL
151#endif
152
153static int ds1286_read_time(struct device *dev, struct rtc_time *tm)
154{
155 struct ds1286_priv *priv = dev_get_drvdata(dev);
156 unsigned char save_control;
157 unsigned long flags;
158 unsigned long uip_watchdog = jiffies;
159
160 /*
161 * read RTC once any update in progress is done. The update
162 * can take just over 2ms. We wait 10 to 20ms. There is no need to
163 * to poll-wait (up to 1s - eeccch) for the falling edge of RTC_UIP.
164 * If you need to know *exactly* when a second has started, enable
165 * periodic update complete interrupts, (via ioctl) and then
166 * immediately read /dev/rtc which will block until you get the IRQ.
167 * Once the read clears, read the RTC time (again via ioctl). Easy.
168 */
169
170 if (ds1286_rtc_read(priv, RTC_CMD) & RTC_TE)
171 while (time_before(jiffies, uip_watchdog + 2*HZ/100))
172 barrier();
173
174 /*
175 * Only the values that we read from the RTC are set. We leave
176 * tm_wday, tm_yday and tm_isdst untouched. Even though the
177 * RTC has RTC_DAY_OF_WEEK, we ignore it, as it is only updated
178 * by the RTC when initially set to a non-zero value.
179 */
180 spin_lock_irqsave(&priv->lock, flags);
181 save_control = ds1286_rtc_read(priv, RTC_CMD);
182 ds1286_rtc_write(priv, (save_control|RTC_TE), RTC_CMD);
183
184 tm->tm_sec = ds1286_rtc_read(priv, RTC_SECONDS);
185 tm->tm_min = ds1286_rtc_read(priv, RTC_MINUTES);
186 tm->tm_hour = ds1286_rtc_read(priv, RTC_HOURS) & 0x3f;
187 tm->tm_mday = ds1286_rtc_read(priv, RTC_DATE);
188 tm->tm_mon = ds1286_rtc_read(priv, RTC_MONTH) & 0x1f;
189 tm->tm_year = ds1286_rtc_read(priv, RTC_YEAR);
190
191 ds1286_rtc_write(priv, save_control, RTC_CMD);
192 spin_unlock_irqrestore(&priv->lock, flags);
193
194 tm->tm_sec = bcd2bin(tm->tm_sec);
195 tm->tm_min = bcd2bin(tm->tm_min);
196 tm->tm_hour = bcd2bin(tm->tm_hour);
197 tm->tm_mday = bcd2bin(tm->tm_mday);
198 tm->tm_mon = bcd2bin(tm->tm_mon);
199 tm->tm_year = bcd2bin(tm->tm_year);
200
201 /*
202 * Account for differences between how the RTC uses the values
203 * and how they are defined in a struct rtc_time;
204 */
205 if (tm->tm_year < 45)
206 tm->tm_year += 30;
207 tm->tm_year += 40;
208 if (tm->tm_year < 70)
209 tm->tm_year += 100;
210
211 tm->tm_mon--;
212
213 return rtc_valid_tm(tm);
214}
215
216static int ds1286_set_time(struct device *dev, struct rtc_time *tm)
217{
218 struct ds1286_priv *priv = dev_get_drvdata(dev);
219 unsigned char mon, day, hrs, min, sec;
220 unsigned char save_control;
221 unsigned int yrs;
222 unsigned long flags;
223
224 yrs = tm->tm_year + 1900;
225 mon = tm->tm_mon + 1; /* tm_mon starts at zero */
226 day = tm->tm_mday;
227 hrs = tm->tm_hour;
228 min = tm->tm_min;
229 sec = tm->tm_sec;
230
231 if (yrs < 1970)
232 return -EINVAL;
233
234 yrs -= 1940;
235 if (yrs > 255) /* They are unsigned */
236 return -EINVAL;
237
238 if (yrs >= 100)
239 yrs -= 100;
240
241 sec = bin2bcd(sec);
242 min = bin2bcd(min);
243 hrs = bin2bcd(hrs);
244 day = bin2bcd(day);
245 mon = bin2bcd(mon);
246 yrs = bin2bcd(yrs);
247
248 spin_lock_irqsave(&priv->lock, flags);
249 save_control = ds1286_rtc_read(priv, RTC_CMD);
250 ds1286_rtc_write(priv, (save_control|RTC_TE), RTC_CMD);
251
252 ds1286_rtc_write(priv, yrs, RTC_YEAR);
253 ds1286_rtc_write(priv, mon, RTC_MONTH);
254 ds1286_rtc_write(priv, day, RTC_DATE);
255 ds1286_rtc_write(priv, hrs, RTC_HOURS);
256 ds1286_rtc_write(priv, min, RTC_MINUTES);
257 ds1286_rtc_write(priv, sec, RTC_SECONDS);
258 ds1286_rtc_write(priv, 0, RTC_HUNDREDTH_SECOND);
259
260 ds1286_rtc_write(priv, save_control, RTC_CMD);
261 spin_unlock_irqrestore(&priv->lock, flags);
262 return 0;
263}
264
265static int ds1286_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
266{
267 struct ds1286_priv *priv = dev_get_drvdata(dev);
268 unsigned char cmd;
269 unsigned long flags;
270
271 /*
272 * Only the values that we read from the RTC are set. That
273 * means only tm_wday, tm_hour, tm_min.
274 */
275 spin_lock_irqsave(&priv->lock, flags);
276 alm->time.tm_min = ds1286_rtc_read(priv, RTC_MINUTES_ALARM) & 0x7f;
277 alm->time.tm_hour = ds1286_rtc_read(priv, RTC_HOURS_ALARM) & 0x1f;
278 alm->time.tm_wday = ds1286_rtc_read(priv, RTC_DAY_ALARM) & 0x07;
279 cmd = ds1286_rtc_read(priv, RTC_CMD);
280 spin_unlock_irqrestore(&priv->lock, flags);
281
282 alm->time.tm_min = bcd2bin(alm->time.tm_min);
283 alm->time.tm_hour = bcd2bin(alm->time.tm_hour);
284 alm->time.tm_sec = 0;
285 return 0;
286}
287
288static int ds1286_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
289{
290 struct ds1286_priv *priv = dev_get_drvdata(dev);
291 unsigned char hrs, min, sec;
292
293 hrs = alm->time.tm_hour;
294 min = alm->time.tm_min;
295 sec = alm->time.tm_sec;
296
297 if (hrs >= 24)
298 hrs = 0xff;
299
300 if (min >= 60)
301 min = 0xff;
302
303 if (sec != 0)
304 return -EINVAL;
305
306 min = bin2bcd(min);
307 hrs = bin2bcd(hrs);
308
309 spin_lock(&priv->lock);
310 ds1286_rtc_write(priv, hrs, RTC_HOURS_ALARM);
311 ds1286_rtc_write(priv, min, RTC_MINUTES_ALARM);
312 spin_unlock(&priv->lock);
313
314 return 0;
315}
316
317static const struct rtc_class_ops ds1286_ops = {
318 .ioctl = ds1286_ioctl,
319 .proc = ds1286_proc,
320 .read_time = ds1286_read_time,
321 .set_time = ds1286_set_time,
322 .read_alarm = ds1286_read_alarm,
323 .set_alarm = ds1286_set_alarm,
324};
325
326static int __devinit ds1286_probe(struct platform_device *pdev)
327{
328 struct rtc_device *rtc;
329 struct resource *res;
330 struct ds1286_priv *priv;
331 int ret = 0;
332
333 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
334 if (!res)
335 return -ENODEV;
336 priv = kzalloc(sizeof(struct ds1286_priv), GFP_KERNEL);
337 if (!priv)
338 return -ENOMEM;
339
340 priv->size = res->end - res->start + 1;
341 if (!request_mem_region(res->start, priv->size, pdev->name)) {
342 ret = -EBUSY;
343 goto out;
344 }
345 priv->baseaddr = res->start;
346 priv->rtcregs = ioremap(priv->baseaddr, priv->size);
347 if (!priv->rtcregs) {
348 ret = -ENOMEM;
349 goto out;
350 }
351 spin_lock_init(&priv->lock);
352 rtc = rtc_device_register("ds1286", &pdev->dev,
353 &ds1286_ops, THIS_MODULE);
354 if (IS_ERR(rtc)) {
355 ret = PTR_ERR(rtc);
356 goto out;
357 }
358 priv->rtc = rtc;
359 platform_set_drvdata(pdev, priv);
360 return 0;
361
362out:
363 if (priv->rtc)
364 rtc_device_unregister(priv->rtc);
365 if (priv->rtcregs)
366 iounmap(priv->rtcregs);
367 if (priv->baseaddr)
368 release_mem_region(priv->baseaddr, priv->size);
369 kfree(priv);
370 return ret;
371}
372
373static int __devexit ds1286_remove(struct platform_device *pdev)
374{
375 struct ds1286_priv *priv = platform_get_drvdata(pdev);
376
377 rtc_device_unregister(priv->rtc);
378 iounmap(priv->rtcregs);
379 release_mem_region(priv->baseaddr, priv->size);
380 kfree(priv);
381 return 0;
382}
383
384static struct platform_driver ds1286_platform_driver = {
385 .driver = {
386 .name = "rtc-ds1286",
387 .owner = THIS_MODULE,
388 },
389 .probe = ds1286_probe,
390 .remove = __devexit_p(ds1286_remove),
391};
392
393static int __init ds1286_init(void)
394{
395 return platform_driver_register(&ds1286_platform_driver);
396}
397
398static void __exit ds1286_exit(void)
399{
400 platform_driver_unregister(&ds1286_platform_driver);
401}
402
403MODULE_AUTHOR("Thomas Bogendoerfer <tsbogend@alpha.franken.de>");
404MODULE_DESCRIPTION("DS1286 RTC driver");
405MODULE_LICENSE("GPL");
406MODULE_VERSION(DRV_VERSION);
407MODULE_ALIAS("platform:rtc-ds1286");
408
409module_init(ds1286_init);
410module_exit(ds1286_exit);
diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c
index bbf97e65202a..4fcf0734a6ef 100644
--- a/drivers/rtc/rtc-ds1307.c
+++ b/drivers/rtc/rtc-ds1307.c
@@ -23,10 +23,6 @@
23 * to have set the chip up as a clock (turning on the oscillator and 23 * to have set the chip up as a clock (turning on the oscillator and
24 * setting the date and time), Linux can ignore the non-clock features. 24 * setting the date and time), Linux can ignore the non-clock features.
25 * That's a natural job for a factory or repair bench. 25 * That's a natural job for a factory or repair bench.
26 *
27 * This is currently a simple no-alarms driver. If your board has the
28 * alarm irq wired up on a ds1337 or ds1339, and you want to use that,
29 * then look at the rtc-rs5c372 driver for code to steal...
30 */ 26 */
31enum ds_type { 27enum ds_type {
32 ds_1307, 28 ds_1307,
@@ -67,6 +63,7 @@ enum ds_type {
67# define DS1307_BIT_RS0 0x01 63# define DS1307_BIT_RS0 0x01
68#define DS1337_REG_CONTROL 0x0e 64#define DS1337_REG_CONTROL 0x0e
69# define DS1337_BIT_nEOSC 0x80 65# define DS1337_BIT_nEOSC 0x80
66# define DS1339_BIT_BBSQI 0x20
70# define DS1337_BIT_RS2 0x10 67# define DS1337_BIT_RS2 0x10
71# define DS1337_BIT_RS1 0x08 68# define DS1337_BIT_RS1 0x08
72# define DS1337_BIT_INTCN 0x04 69# define DS1337_BIT_INTCN 0x04
@@ -83,19 +80,22 @@ enum ds_type {
83# define DS1337_BIT_OSF 0x80 80# define DS1337_BIT_OSF 0x80
84# define DS1337_BIT_A2I 0x02 81# define DS1337_BIT_A2I 0x02
85# define DS1337_BIT_A1I 0x01 82# define DS1337_BIT_A1I 0x01
83#define DS1339_REG_ALARM1_SECS 0x07
86#define DS1339_REG_TRICKLE 0x10 84#define DS1339_REG_TRICKLE 0x10
87 85
88 86
89 87
90struct ds1307 { 88struct ds1307 {
91 u8 reg_addr; 89 u8 reg_addr;
92 bool has_nvram; 90 u8 regs[11];
93 u8 regs[8];
94 enum ds_type type; 91 enum ds_type type;
92 unsigned long flags;
93#define HAS_NVRAM 0 /* bit 0 == sysfs file active */
94#define HAS_ALARM 1 /* bit 1 == irq claimed */
95 struct i2c_msg msg[2]; 95 struct i2c_msg msg[2];
96 struct i2c_client *client; 96 struct i2c_client *client;
97 struct i2c_client dev;
98 struct rtc_device *rtc; 97 struct rtc_device *rtc;
98 struct work_struct work;
99}; 99};
100 100
101struct chip_desc { 101struct chip_desc {
@@ -132,12 +132,79 @@ static const struct i2c_device_id ds1307_id[] = {
132}; 132};
133MODULE_DEVICE_TABLE(i2c, ds1307_id); 133MODULE_DEVICE_TABLE(i2c, ds1307_id);
134 134
135/*----------------------------------------------------------------------*/
136
137/*
138 * The IRQ logic includes a "real" handler running in IRQ context just
139 * long enough to schedule this workqueue entry. We need a task context
140 * to talk to the RTC, since I2C I/O calls require that; and disable the
141 * IRQ until we clear its status on the chip, so that this handler can
142 * work with any type of triggering (not just falling edge).
143 *
144 * The ds1337 and ds1339 both have two alarms, but we only use the first
145 * one (with a "seconds" field). For ds1337 we expect nINTA is our alarm
146 * signal; ds1339 chips have only one alarm signal.
147 */
148static void ds1307_work(struct work_struct *work)
149{
150 struct ds1307 *ds1307;
151 struct i2c_client *client;
152 struct mutex *lock;
153 int stat, control;
154
155 ds1307 = container_of(work, struct ds1307, work);
156 client = ds1307->client;
157 lock = &ds1307->rtc->ops_lock;
158
159 mutex_lock(lock);
160 stat = i2c_smbus_read_byte_data(client, DS1337_REG_STATUS);
161 if (stat < 0)
162 goto out;
163
164 if (stat & DS1337_BIT_A1I) {
165 stat &= ~DS1337_BIT_A1I;
166 i2c_smbus_write_byte_data(client, DS1337_REG_STATUS, stat);
167
168 control = i2c_smbus_read_byte_data(client, DS1337_REG_CONTROL);
169 if (control < 0)
170 goto out;
171
172 control &= ~DS1337_BIT_A1IE;
173 i2c_smbus_write_byte_data(client, DS1337_REG_CONTROL, control);
174
175 /* rtc_update_irq() assumes that it is called
176 * from IRQ-disabled context.
177 */
178 local_irq_disable();
179 rtc_update_irq(ds1307->rtc, 1, RTC_AF | RTC_IRQF);
180 local_irq_enable();
181 }
182
183out:
184 if (test_bit(HAS_ALARM, &ds1307->flags))
185 enable_irq(client->irq);
186 mutex_unlock(lock);
187}
188
189static irqreturn_t ds1307_irq(int irq, void *dev_id)
190{
191 struct i2c_client *client = dev_id;
192 struct ds1307 *ds1307 = i2c_get_clientdata(client);
193
194 disable_irq_nosync(irq);
195 schedule_work(&ds1307->work);
196 return IRQ_HANDLED;
197}
198
199/*----------------------------------------------------------------------*/
200
135static int ds1307_get_time(struct device *dev, struct rtc_time *t) 201static int ds1307_get_time(struct device *dev, struct rtc_time *t)
136{ 202{
137 struct ds1307 *ds1307 = dev_get_drvdata(dev); 203 struct ds1307 *ds1307 = dev_get_drvdata(dev);
138 int tmp; 204 int tmp;
139 205
140 /* read the RTC date and time registers all at once */ 206 /* read the RTC date and time registers all at once */
207 ds1307->reg_addr = 0;
141 ds1307->msg[1].flags = I2C_M_RD; 208 ds1307->msg[1].flags = I2C_M_RD;
142 ds1307->msg[1].len = 7; 209 ds1307->msg[1].len = 7;
143 210
@@ -231,9 +298,186 @@ static int ds1307_set_time(struct device *dev, struct rtc_time *t)
231 return 0; 298 return 0;
232} 299}
233 300
301static int ds1307_read_alarm(struct device *dev, struct rtc_wkalrm *t)
302{
303 struct i2c_client *client = to_i2c_client(dev);
304 struct ds1307 *ds1307 = i2c_get_clientdata(client);
305 int ret;
306
307 if (!test_bit(HAS_ALARM, &ds1307->flags))
308 return -EINVAL;
309
310 /* read all ALARM1, ALARM2, and status registers at once */
311 ds1307->reg_addr = DS1339_REG_ALARM1_SECS;
312 ds1307->msg[1].flags = I2C_M_RD;
313 ds1307->msg[1].len = 9;
314
315 ret = i2c_transfer(to_i2c_adapter(client->dev.parent),
316 ds1307->msg, 2);
317 if (ret != 2) {
318 dev_err(dev, "%s error %d\n", "alarm read", ret);
319 return -EIO;
320 }
321
322 dev_dbg(dev, "%s: %02x %02x %02x %02x, %02x %02x %02x, %02x %02x\n",
323 "alarm read",
324 ds1307->regs[0], ds1307->regs[1],
325 ds1307->regs[2], ds1307->regs[3],
326 ds1307->regs[4], ds1307->regs[5],
327 ds1307->regs[6], ds1307->regs[7],
328 ds1307->regs[8]);
329
330 /* report alarm time (ALARM1); assume 24 hour and day-of-month modes,
331 * and that all four fields are checked matches
332 */
333 t->time.tm_sec = bcd2bin(ds1307->regs[0] & 0x7f);
334 t->time.tm_min = bcd2bin(ds1307->regs[1] & 0x7f);
335 t->time.tm_hour = bcd2bin(ds1307->regs[2] & 0x3f);
336 t->time.tm_mday = bcd2bin(ds1307->regs[3] & 0x3f);
337 t->time.tm_mon = -1;
338 t->time.tm_year = -1;
339 t->time.tm_wday = -1;
340 t->time.tm_yday = -1;
341 t->time.tm_isdst = -1;
342
343 /* ... and status */
344 t->enabled = !!(ds1307->regs[7] & DS1337_BIT_A1IE);
345 t->pending = !!(ds1307->regs[8] & DS1337_BIT_A1I);
346
347 dev_dbg(dev, "%s secs=%d, mins=%d, "
348 "hours=%d, mday=%d, enabled=%d, pending=%d\n",
349 "alarm read", t->time.tm_sec, t->time.tm_min,
350 t->time.tm_hour, t->time.tm_mday,
351 t->enabled, t->pending);
352
353 return 0;
354}
355
356static int ds1307_set_alarm(struct device *dev, struct rtc_wkalrm *t)
357{
358 struct i2c_client *client = to_i2c_client(dev);
359 struct ds1307 *ds1307 = i2c_get_clientdata(client);
360 unsigned char *buf = ds1307->regs;
361 u8 control, status;
362 int ret;
363
364 if (!test_bit(HAS_ALARM, &ds1307->flags))
365 return -EINVAL;
366
367 dev_dbg(dev, "%s secs=%d, mins=%d, "
368 "hours=%d, mday=%d, enabled=%d, pending=%d\n",
369 "alarm set", t->time.tm_sec, t->time.tm_min,
370 t->time.tm_hour, t->time.tm_mday,
371 t->enabled, t->pending);
372
373 /* read current status of both alarms and the chip */
374 ds1307->reg_addr = DS1339_REG_ALARM1_SECS;
375 ds1307->msg[1].flags = I2C_M_RD;
376 ds1307->msg[1].len = 9;
377
378 ret = i2c_transfer(to_i2c_adapter(client->dev.parent),
379 ds1307->msg, 2);
380 if (ret != 2) {
381 dev_err(dev, "%s error %d\n", "alarm write", ret);
382 return -EIO;
383 }
384 control = ds1307->regs[7];
385 status = ds1307->regs[8];
386
387 dev_dbg(dev, "%s: %02x %02x %02x %02x, %02x %02x %02x, %02x %02x\n",
388 "alarm set (old status)",
389 ds1307->regs[0], ds1307->regs[1],
390 ds1307->regs[2], ds1307->regs[3],
391 ds1307->regs[4], ds1307->regs[5],
392 ds1307->regs[6], control, status);
393
394 /* set ALARM1, using 24 hour and day-of-month modes */
395 *buf++ = DS1339_REG_ALARM1_SECS; /* first register addr */
396 buf[0] = bin2bcd(t->time.tm_sec);
397 buf[1] = bin2bcd(t->time.tm_min);
398 buf[2] = bin2bcd(t->time.tm_hour);
399 buf[3] = bin2bcd(t->time.tm_mday);
400
401 /* set ALARM2 to non-garbage */
402 buf[4] = 0;
403 buf[5] = 0;
404 buf[6] = 0;
405
406 /* optionally enable ALARM1 */
407 buf[7] = control & ~(DS1337_BIT_A1IE | DS1337_BIT_A2IE);
408 if (t->enabled) {
409 dev_dbg(dev, "alarm IRQ armed\n");
410 buf[7] |= DS1337_BIT_A1IE; /* only ALARM1 is used */
411 }
412 buf[8] = status & ~(DS1337_BIT_A1I | DS1337_BIT_A2I);
413
414 ds1307->msg[1].flags = 0;
415 ds1307->msg[1].len = 10;
416
417 ret = i2c_transfer(to_i2c_adapter(client->dev.parent),
418 &ds1307->msg[1], 1);
419 if (ret != 1) {
420 dev_err(dev, "can't set alarm time\n");
421 return -EIO;
422 }
423
424 return 0;
425}
426
427static int ds1307_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
428{
429 struct i2c_client *client = to_i2c_client(dev);
430 struct ds1307 *ds1307 = i2c_get_clientdata(client);
431 int ret;
432
433 switch (cmd) {
434 case RTC_AIE_OFF:
435 if (!test_bit(HAS_ALARM, &ds1307->flags))
436 return -ENOTTY;
437
438 ret = i2c_smbus_read_byte_data(client, DS1337_REG_CONTROL);
439 if (ret < 0)
440 return ret;
441
442 ret &= ~DS1337_BIT_A1IE;
443
444 ret = i2c_smbus_write_byte_data(client,
445 DS1337_REG_CONTROL, ret);
446 if (ret < 0)
447 return ret;
448
449 break;
450
451 case RTC_AIE_ON:
452 if (!test_bit(HAS_ALARM, &ds1307->flags))
453 return -ENOTTY;
454
455 ret = i2c_smbus_read_byte_data(client, DS1337_REG_CONTROL);
456 if (ret < 0)
457 return ret;
458
459 ret |= DS1337_BIT_A1IE;
460
461 ret = i2c_smbus_write_byte_data(client,
462 DS1337_REG_CONTROL, ret);
463 if (ret < 0)
464 return ret;
465
466 break;
467
468 default:
469 return -ENOIOCTLCMD;
470 }
471
472 return 0;
473}
474
234static const struct rtc_class_ops ds13xx_rtc_ops = { 475static const struct rtc_class_ops ds13xx_rtc_ops = {
235 .read_time = ds1307_get_time, 476 .read_time = ds1307_get_time,
236 .set_time = ds1307_set_time, 477 .set_time = ds1307_set_time,
478 .read_alarm = ds1307_read_alarm,
479 .set_alarm = ds1307_set_alarm,
480 .ioctl = ds1307_ioctl,
237}; 481};
238 482
239/*----------------------------------------------------------------------*/ 483/*----------------------------------------------------------------------*/
@@ -327,6 +571,7 @@ static int __devinit ds1307_probe(struct i2c_client *client,
327 int tmp; 571 int tmp;
328 const struct chip_desc *chip = &chips[id->driver_data]; 572 const struct chip_desc *chip = &chips[id->driver_data];
329 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); 573 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
574 int want_irq = false;
330 575
331 if (!i2c_check_functionality(adapter, 576 if (!i2c_check_functionality(adapter,
332 I2C_FUNC_I2C | I2C_FUNC_SMBUS_WRITE_BYTE_DATA)) 577 I2C_FUNC_I2C | I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
@@ -353,6 +598,12 @@ static int __devinit ds1307_probe(struct i2c_client *client,
353 switch (ds1307->type) { 598 switch (ds1307->type) {
354 case ds_1337: 599 case ds_1337:
355 case ds_1339: 600 case ds_1339:
601 /* has IRQ? */
602 if (ds1307->client->irq > 0 && chip->alarm) {
603 INIT_WORK(&ds1307->work, ds1307_work);
604 want_irq = true;
605 }
606
356 ds1307->reg_addr = DS1337_REG_CONTROL; 607 ds1307->reg_addr = DS1337_REG_CONTROL;
357 ds1307->msg[1].len = 2; 608 ds1307->msg[1].len = 2;
358 609
@@ -369,8 +620,20 @@ static int __devinit ds1307_probe(struct i2c_client *client,
369 620
370 /* oscillator off? turn it on, so clock can tick. */ 621 /* oscillator off? turn it on, so clock can tick. */
371 if (ds1307->regs[0] & DS1337_BIT_nEOSC) 622 if (ds1307->regs[0] & DS1337_BIT_nEOSC)
372 i2c_smbus_write_byte_data(client, DS1337_REG_CONTROL, 623 ds1307->regs[0] &= ~DS1337_BIT_nEOSC;
373 ds1307->regs[0] & ~DS1337_BIT_nEOSC); 624
625 /* Using IRQ? Disable the square wave and both alarms.
626 * For ds1339, be sure alarms can trigger when we're
627 * running on Vbackup (BBSQI); we assume ds1337 will
628 * ignore that bit
629 */
630 if (want_irq) {
631 ds1307->regs[0] |= DS1337_BIT_INTCN | DS1339_BIT_BBSQI;
632 ds1307->regs[0] &= ~(DS1337_BIT_A2IE | DS1337_BIT_A1IE);
633 }
634
635 i2c_smbus_write_byte_data(client, DS1337_REG_CONTROL,
636 ds1307->regs[0]);
374 637
375 /* oscillator fault? clear flag, and warn */ 638 /* oscillator fault? clear flag, and warn */
376 if (ds1307->regs[1] & DS1337_BIT_OSF) { 639 if (ds1307->regs[1] & DS1337_BIT_OSF) {
@@ -495,10 +758,22 @@ read_rtc:
495 goto exit_free; 758 goto exit_free;
496 } 759 }
497 760
761 if (want_irq) {
762 err = request_irq(client->irq, ds1307_irq, 0,
763 ds1307->rtc->name, client);
764 if (err) {
765 dev_err(&client->dev,
766 "unable to request IRQ!\n");
767 goto exit_irq;
768 }
769 set_bit(HAS_ALARM, &ds1307->flags);
770 dev_dbg(&client->dev, "got IRQ %d\n", client->irq);
771 }
772
498 if (chip->nvram56) { 773 if (chip->nvram56) {
499 err = sysfs_create_bin_file(&client->dev.kobj, &nvram); 774 err = sysfs_create_bin_file(&client->dev.kobj, &nvram);
500 if (err == 0) { 775 if (err == 0) {
501 ds1307->has_nvram = true; 776 set_bit(HAS_NVRAM, &ds1307->flags);
502 dev_info(&client->dev, "56 bytes nvram\n"); 777 dev_info(&client->dev, "56 bytes nvram\n");
503 } 778 }
504 } 779 }
@@ -512,7 +787,9 @@ exit_bad:
512 ds1307->regs[2], ds1307->regs[3], 787 ds1307->regs[2], ds1307->regs[3],
513 ds1307->regs[4], ds1307->regs[5], 788 ds1307->regs[4], ds1307->regs[5],
514 ds1307->regs[6]); 789 ds1307->regs[6]);
515 790exit_irq:
791 if (ds1307->rtc)
792 rtc_device_unregister(ds1307->rtc);
516exit_free: 793exit_free:
517 kfree(ds1307); 794 kfree(ds1307);
518 return err; 795 return err;
@@ -520,9 +797,14 @@ exit_free:
520 797
521static int __devexit ds1307_remove(struct i2c_client *client) 798static int __devexit ds1307_remove(struct i2c_client *client)
522{ 799{
523 struct ds1307 *ds1307 = i2c_get_clientdata(client); 800 struct ds1307 *ds1307 = i2c_get_clientdata(client);
801
802 if (test_and_clear_bit(HAS_ALARM, &ds1307->flags)) {
803 free_irq(client->irq, client);
804 cancel_work_sync(&ds1307->work);
805 }
524 806
525 if (ds1307->has_nvram) 807 if (test_and_clear_bit(HAS_NVRAM, &ds1307->flags))
526 sysfs_remove_bin_file(&client->dev.kobj, &nvram); 808 sysfs_remove_bin_file(&client->dev.kobj, &nvram);
527 809
528 rtc_device_unregister(ds1307->rtc); 810 rtc_device_unregister(ds1307->rtc);
diff --git a/drivers/rtc/rtc-ds1374.c b/drivers/rtc/rtc-ds1374.c
index a150418fba76..a5b0fc09f0c6 100644
--- a/drivers/rtc/rtc-ds1374.c
+++ b/drivers/rtc/rtc-ds1374.c
@@ -429,12 +429,33 @@ static int __devexit ds1374_remove(struct i2c_client *client)
429 return 0; 429 return 0;
430} 430}
431 431
432#ifdef CONFIG_PM
433static int ds1374_suspend(struct i2c_client *client, pm_message_t state)
434{
435 if (client->irq >= 0 && device_may_wakeup(&client->dev))
436 enable_irq_wake(client->irq);
437 return 0;
438}
439
440static int ds1374_resume(struct i2c_client *client)
441{
442 if (client->irq >= 0 && device_may_wakeup(&client->dev))
443 disable_irq_wake(client->irq);
444 return 0;
445}
446#else
447#define ds1374_suspend NULL
448#define ds1374_resume NULL
449#endif
450
432static struct i2c_driver ds1374_driver = { 451static struct i2c_driver ds1374_driver = {
433 .driver = { 452 .driver = {
434 .name = "rtc-ds1374", 453 .name = "rtc-ds1374",
435 .owner = THIS_MODULE, 454 .owner = THIS_MODULE,
436 }, 455 },
437 .probe = ds1374_probe, 456 .probe = ds1374_probe,
457 .suspend = ds1374_suspend,
458 .resume = ds1374_resume,
438 .remove = __devexit_p(ds1374_remove), 459 .remove = __devexit_p(ds1374_remove),
439 .id_table = ds1374_id, 460 .id_table = ds1374_id,
440}; 461};
diff --git a/drivers/rtc/rtc-ds1511.c b/drivers/rtc/rtc-ds1511.c
index 0f0d27d1c4ca..86981d34fbb6 100644
--- a/drivers/rtc/rtc-ds1511.c
+++ b/drivers/rtc/rtc-ds1511.c
@@ -379,18 +379,6 @@ ds1511_interrupt(int irq, void *dev_id)
379 return IRQ_HANDLED; 379 return IRQ_HANDLED;
380} 380}
381 381
382 static void
383ds1511_rtc_release(struct device *dev)
384{
385 struct platform_device *pdev = to_platform_device(dev);
386 struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
387
388 if (pdata->irq >= 0) {
389 pdata->irqen = 0;
390 ds1511_rtc_update_alarm(pdata);
391 }
392}
393
394 static int 382 static int
395ds1511_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) 383ds1511_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
396{ 384{
@@ -428,7 +416,6 @@ static const struct rtc_class_ops ds1511_rtc_ops = {
428 .set_time = ds1511_rtc_set_time, 416 .set_time = ds1511_rtc_set_time,
429 .read_alarm = ds1511_rtc_read_alarm, 417 .read_alarm = ds1511_rtc_read_alarm,
430 .set_alarm = ds1511_rtc_set_alarm, 418 .set_alarm = ds1511_rtc_set_alarm,
431 .release = ds1511_rtc_release,
432 .ioctl = ds1511_rtc_ioctl, 419 .ioctl = ds1511_rtc_ioctl,
433}; 420};
434 421
diff --git a/drivers/rtc/rtc-ds1553.c b/drivers/rtc/rtc-ds1553.c
index a19f11415540..4ef59285b489 100644
--- a/drivers/rtc/rtc-ds1553.c
+++ b/drivers/rtc/rtc-ds1553.c
@@ -207,17 +207,6 @@ static irqreturn_t ds1553_rtc_interrupt(int irq, void *dev_id)
207 return IRQ_HANDLED; 207 return IRQ_HANDLED;
208} 208}
209 209
210static void ds1553_rtc_release(struct device *dev)
211{
212 struct platform_device *pdev = to_platform_device(dev);
213 struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
214
215 if (pdata->irq >= 0) {
216 pdata->irqen = 0;
217 ds1553_rtc_update_alarm(pdata);
218 }
219}
220
221static int ds1553_rtc_ioctl(struct device *dev, unsigned int cmd, 210static int ds1553_rtc_ioctl(struct device *dev, unsigned int cmd,
222 unsigned long arg) 211 unsigned long arg)
223{ 212{
@@ -254,7 +243,6 @@ static const struct rtc_class_ops ds1553_rtc_ops = {
254 .set_time = ds1553_rtc_set_time, 243 .set_time = ds1553_rtc_set_time,
255 .read_alarm = ds1553_rtc_read_alarm, 244 .read_alarm = ds1553_rtc_read_alarm,
256 .set_alarm = ds1553_rtc_set_alarm, 245 .set_alarm = ds1553_rtc_set_alarm,
257 .release = ds1553_rtc_release,
258 .ioctl = ds1553_rtc_ioctl, 246 .ioctl = ds1553_rtc_ioctl,
259}; 247};
260 248
diff --git a/drivers/rtc/rtc-ds1672.c b/drivers/rtc/rtc-ds1672.c
index 6fa4556f5f5c..341d7a5b45a2 100644
--- a/drivers/rtc/rtc-ds1672.c
+++ b/drivers/rtc/rtc-ds1672.c
@@ -9,17 +9,10 @@
9 * published by the Free Software Foundation. 9 * published by the Free Software Foundation.
10 */ 10 */
11 11
12#include <linux/module.h>
13#include <linux/i2c.h> 12#include <linux/i2c.h>
14#include <linux/rtc.h> 13#include <linux/rtc.h>
15 14
16#define DRV_VERSION "0.3" 15#define DRV_VERSION "0.4"
17
18/* Addresses to scan: none. This chip cannot be detected. */
19static const unsigned short normal_i2c[] = { I2C_CLIENT_END };
20
21/* Insmod parameters */
22I2C_CLIENT_INSMOD;
23 16
24/* Registers */ 17/* Registers */
25 18
@@ -29,8 +22,7 @@ I2C_CLIENT_INSMOD;
29 22
30#define DS1672_REG_CONTROL_EOSC 0x80 23#define DS1672_REG_CONTROL_EOSC 0x80
31 24
32/* Prototypes */ 25static struct i2c_driver ds1672_driver;
33static int ds1672_probe(struct i2c_adapter *adapter, int address, int kind);
34 26
35/* 27/*
36 * In the routines that deal directly with the ds1672 hardware, we use 28 * In the routines that deal directly with the ds1672 hardware, we use
@@ -44,8 +36,8 @@ static int ds1672_get_datetime(struct i2c_client *client, struct rtc_time *tm)
44 unsigned char buf[4]; 36 unsigned char buf[4];
45 37
46 struct i2c_msg msgs[] = { 38 struct i2c_msg msgs[] = {
47 { client->addr, 0, 1, &addr }, /* setup read ptr */ 39 {client->addr, 0, 1, &addr}, /* setup read ptr */
48 { client->addr, I2C_M_RD, 4, buf }, /* read date */ 40 {client->addr, I2C_M_RD, 4, buf}, /* read date */
49 }; 41 };
50 42
51 /* read date registers */ 43 /* read date registers */
@@ -80,7 +72,7 @@ static int ds1672_set_mmss(struct i2c_client *client, unsigned long secs)
80 buf[2] = (secs & 0x0000FF00) >> 8; 72 buf[2] = (secs & 0x0000FF00) >> 8;
81 buf[3] = (secs & 0x00FF0000) >> 16; 73 buf[3] = (secs & 0x00FF0000) >> 16;
82 buf[4] = (secs & 0xFF000000) >> 24; 74 buf[4] = (secs & 0xFF000000) >> 24;
83 buf[5] = 0; /* set control reg to enable counting */ 75 buf[5] = 0; /* set control reg to enable counting */
84 76
85 xfer = i2c_master_send(client, buf, 6); 77 xfer = i2c_master_send(client, buf, 6);
86 if (xfer != 6) { 78 if (xfer != 6) {
@@ -127,8 +119,8 @@ static int ds1672_get_control(struct i2c_client *client, u8 *status)
127 unsigned char addr = DS1672_REG_CONTROL; 119 unsigned char addr = DS1672_REG_CONTROL;
128 120
129 struct i2c_msg msgs[] = { 121 struct i2c_msg msgs[] = {
130 { client->addr, 0, 1, &addr }, /* setup read ptr */ 122 {client->addr, 0, 1, &addr}, /* setup read ptr */
131 { client->addr, I2C_M_RD, 1, status }, /* read control */ 123 {client->addr, I2C_M_RD, 1, status}, /* read control */
132 }; 124 };
133 125
134 /* read control register */ 126 /* read control register */
@@ -141,7 +133,8 @@ static int ds1672_get_control(struct i2c_client *client, u8 *status)
141} 133}
142 134
143/* following are the sysfs callback functions */ 135/* following are the sysfs callback functions */
144static ssize_t show_control(struct device *dev, struct device_attribute *attr, char *buf) 136static ssize_t show_control(struct device *dev, struct device_attribute *attr,
137 char *buf)
145{ 138{
146 struct i2c_client *client = to_i2c_client(dev); 139 struct i2c_client *client = to_i2c_client(dev);
147 u8 control; 140 u8 control;
@@ -152,85 +145,46 @@ static ssize_t show_control(struct device *dev, struct device_attribute *attr, c
152 return err; 145 return err;
153 146
154 return sprintf(buf, "%s\n", (control & DS1672_REG_CONTROL_EOSC) 147 return sprintf(buf, "%s\n", (control & DS1672_REG_CONTROL_EOSC)
155 ? "disabled" : "enabled"); 148 ? "disabled" : "enabled");
156} 149}
150
157static DEVICE_ATTR(control, S_IRUGO, show_control, NULL); 151static DEVICE_ATTR(control, S_IRUGO, show_control, NULL);
158 152
159static const struct rtc_class_ops ds1672_rtc_ops = { 153static const struct rtc_class_ops ds1672_rtc_ops = {
160 .read_time = ds1672_rtc_read_time, 154 .read_time = ds1672_rtc_read_time,
161 .set_time = ds1672_rtc_set_time, 155 .set_time = ds1672_rtc_set_time,
162 .set_mmss = ds1672_rtc_set_mmss, 156 .set_mmss = ds1672_rtc_set_mmss,
163}; 157};
164 158
165static int ds1672_attach(struct i2c_adapter *adapter) 159static int ds1672_remove(struct i2c_client *client)
166{ 160{
167 return i2c_probe(adapter, &addr_data, ds1672_probe);
168}
169
170static int ds1672_detach(struct i2c_client *client)
171{
172 int err;
173 struct rtc_device *rtc = i2c_get_clientdata(client); 161 struct rtc_device *rtc = i2c_get_clientdata(client);
174 162
175 if (rtc) 163 if (rtc)
176 rtc_device_unregister(rtc); 164 rtc_device_unregister(rtc);
177 165
178 if ((err = i2c_detach_client(client)))
179 return err;
180
181 kfree(client);
182
183 return 0; 166 return 0;
184} 167}
185 168
186static struct i2c_driver ds1672_driver = { 169static int ds1672_probe(struct i2c_client *client,
187 .driver = { 170 const struct i2c_device_id *id)
188 .name = "ds1672",
189 },
190 .id = I2C_DRIVERID_DS1672,
191 .attach_adapter = &ds1672_attach,
192 .detach_client = &ds1672_detach,
193};
194
195static int ds1672_probe(struct i2c_adapter *adapter, int address, int kind)
196{ 171{
197 int err = 0; 172 int err = 0;
198 u8 control; 173 u8 control;
199 struct i2c_client *client;
200 struct rtc_device *rtc; 174 struct rtc_device *rtc;
201 175
202 dev_dbg(&adapter->dev, "%s\n", __func__); 176 dev_dbg(&client->dev, "%s\n", __func__);
203 177
204 if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) { 178 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
205 err = -ENODEV; 179 return -ENODEV;
206 goto exit;
207 }
208
209 if (!(client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL))) {
210 err = -ENOMEM;
211 goto exit;
212 }
213
214 /* I2C client */
215 client->addr = address;
216 client->driver = &ds1672_driver;
217 client->adapter = adapter;
218
219 strlcpy(client->name, ds1672_driver.driver.name, I2C_NAME_SIZE);
220
221 /* Inform the i2c layer */
222 if ((err = i2c_attach_client(client)))
223 goto exit_kfree;
224 180
225 dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n"); 181 dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n");
226 182
227 rtc = rtc_device_register(ds1672_driver.driver.name, &client->dev, 183 rtc = rtc_device_register(ds1672_driver.driver.name, &client->dev,
228 &ds1672_rtc_ops, THIS_MODULE); 184 &ds1672_rtc_ops, THIS_MODULE);
229 185
230 if (IS_ERR(rtc)) { 186 if (IS_ERR(rtc))
231 err = PTR_ERR(rtc); 187 return PTR_ERR(rtc);
232 goto exit_detach;
233 }
234 188
235 i2c_set_clientdata(client, rtc); 189 i2c_set_clientdata(client, rtc);
236 190
@@ -241,7 +195,7 @@ static int ds1672_probe(struct i2c_adapter *adapter, int address, int kind)
241 195
242 if (control & DS1672_REG_CONTROL_EOSC) 196 if (control & DS1672_REG_CONTROL_EOSC)
243 dev_warn(&client->dev, "Oscillator not enabled. " 197 dev_warn(&client->dev, "Oscillator not enabled. "
244 "Set time to enable.\n"); 198 "Set time to enable.\n");
245 199
246 /* Register sysfs hooks */ 200 /* Register sysfs hooks */
247 err = device_create_file(&client->dev, &dev_attr_control); 201 err = device_create_file(&client->dev, &dev_attr_control);
@@ -250,19 +204,19 @@ static int ds1672_probe(struct i2c_adapter *adapter, int address, int kind)
250 204
251 return 0; 205 return 0;
252 206
253exit_devreg: 207 exit_devreg:
254 rtc_device_unregister(rtc); 208 rtc_device_unregister(rtc);
255
256exit_detach:
257 i2c_detach_client(client);
258
259exit_kfree:
260 kfree(client);
261
262exit:
263 return err; 209 return err;
264} 210}
265 211
212static struct i2c_driver ds1672_driver = {
213 .driver = {
214 .name = "rtc-ds1672",
215 },
216 .probe = &ds1672_probe,
217 .remove = &ds1672_remove,
218};
219
266static int __init ds1672_init(void) 220static int __init ds1672_init(void)
267{ 221{
268 return i2c_add_driver(&ds1672_driver); 222 return i2c_add_driver(&ds1672_driver);
diff --git a/drivers/rtc/rtc-ds3234.c b/drivers/rtc/rtc-ds3234.c
new file mode 100644
index 000000000000..37d131d03f33
--- /dev/null
+++ b/drivers/rtc/rtc-ds3234.c
@@ -0,0 +1,290 @@
1/* drivers/rtc/rtc-ds3234.c
2 *
3 * Driver for Dallas Semiconductor (DS3234) SPI RTC with Integrated Crystal
4 * and SRAM.
5 *
6 * Copyright (C) 2008 MIMOMax Wireless Ltd.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * Changelog:
13 *
14 * 07-May-2008: Dennis Aberilla <denzzzhome@yahoo.com>
15 * - Created based on the max6902 code. Only implements the
16 * date/time keeping functions; no SRAM yet.
17 */
18
19#include <linux/device.h>
20#include <linux/platform_device.h>
21#include <linux/rtc.h>
22#include <linux/spi/spi.h>
23#include <linux/bcd.h>
24
25#define DS3234_REG_SECONDS 0x00
26#define DS3234_REG_MINUTES 0x01
27#define DS3234_REG_HOURS 0x02
28#define DS3234_REG_DAY 0x03
29#define DS3234_REG_DATE 0x04
30#define DS3234_REG_MONTH 0x05
31#define DS3234_REG_YEAR 0x06
32#define DS3234_REG_CENTURY (1 << 7) /* Bit 7 of the Month register */
33
34#define DS3234_REG_CONTROL 0x0E
35#define DS3234_REG_CONT_STAT 0x0F
36
37#undef DS3234_DEBUG
38
39struct ds3234 {
40 struct rtc_device *rtc;
41 u8 buf[8]; /* Burst read: addr + 7 regs */
42 u8 tx_buf[2];
43 u8 rx_buf[2];
44};
45
46static void ds3234_set_reg(struct device *dev, unsigned char address,
47 unsigned char data)
48{
49 struct spi_device *spi = to_spi_device(dev);
50 unsigned char buf[2];
51
52 /* MSB must be '1' to indicate write */
53 buf[0] = address | 0x80;
54 buf[1] = data;
55
56 spi_write(spi, buf, 2);
57}
58
59static int ds3234_get_reg(struct device *dev, unsigned char address,
60 unsigned char *data)
61{
62 struct spi_device *spi = to_spi_device(dev);
63 struct ds3234 *chip = dev_get_drvdata(dev);
64 struct spi_message message;
65 struct spi_transfer xfer;
66 int status;
67
68 if (!data)
69 return -EINVAL;
70
71 /* Build our spi message */
72 spi_message_init(&message);
73 memset(&xfer, 0, sizeof(xfer));
74
75 /* Address + dummy tx byte */
76 xfer.len = 2;
77 xfer.tx_buf = chip->tx_buf;
78 xfer.rx_buf = chip->rx_buf;
79
80 chip->tx_buf[0] = address;
81 chip->tx_buf[1] = 0xff;
82
83 spi_message_add_tail(&xfer, &message);
84
85 /* do the i/o */
86 status = spi_sync(spi, &message);
87 if (status == 0)
88 status = message.status;
89 else
90 return status;
91
92 *data = chip->rx_buf[1];
93
94 return status;
95}
96
97static int ds3234_get_datetime(struct device *dev, struct rtc_time *dt)
98{
99 struct spi_device *spi = to_spi_device(dev);
100 struct ds3234 *chip = dev_get_drvdata(dev);
101 struct spi_message message;
102 struct spi_transfer xfer;
103 int status;
104
105 /* build the message */
106 spi_message_init(&message);
107 memset(&xfer, 0, sizeof(xfer));
108 xfer.len = 1 + 7; /* Addr + 7 registers */
109 xfer.tx_buf = chip->buf;
110 xfer.rx_buf = chip->buf;
111 chip->buf[0] = 0x00; /* Start address */
112 spi_message_add_tail(&xfer, &message);
113
114 /* do the i/o */
115 status = spi_sync(spi, &message);
116 if (status == 0)
117 status = message.status;
118 else
119 return status;
120
121 /* Seconds, Minutes, Hours, Day, Date, Month, Year */
122 dt->tm_sec = bcd2bin(chip->buf[1]);
123 dt->tm_min = bcd2bin(chip->buf[2]);
124 dt->tm_hour = bcd2bin(chip->buf[3] & 0x3f);
125 dt->tm_wday = bcd2bin(chip->buf[4]) - 1; /* 0 = Sun */
126 dt->tm_mday = bcd2bin(chip->buf[5]);
127 dt->tm_mon = bcd2bin(chip->buf[6] & 0x1f) - 1; /* 0 = Jan */
128 dt->tm_year = bcd2bin(chip->buf[7] & 0xff) + 100; /* Assume 20YY */
129
130#ifdef DS3234_DEBUG
131 dev_dbg(dev, "\n%s : Read RTC values\n", __func__);
132 dev_dbg(dev, "tm_hour: %i\n", dt->tm_hour);
133 dev_dbg(dev, "tm_min : %i\n", dt->tm_min);
134 dev_dbg(dev, "tm_sec : %i\n", dt->tm_sec);
135 dev_dbg(dev, "tm_wday: %i\n", dt->tm_wday);
136 dev_dbg(dev, "tm_mday: %i\n", dt->tm_mday);
137 dev_dbg(dev, "tm_mon : %i\n", dt->tm_mon);
138 dev_dbg(dev, "tm_year: %i\n", dt->tm_year);
139#endif
140
141 return 0;
142}
143
144static int ds3234_set_datetime(struct device *dev, struct rtc_time *dt)
145{
146#ifdef DS3234_DEBUG
147 dev_dbg(dev, "\n%s : Setting RTC values\n", __func__);
148 dev_dbg(dev, "tm_sec : %i\n", dt->tm_sec);
149 dev_dbg(dev, "tm_min : %i\n", dt->tm_min);
150 dev_dbg(dev, "tm_hour: %i\n", dt->tm_hour);
151 dev_dbg(dev, "tm_wday: %i\n", dt->tm_wday);
152 dev_dbg(dev, "tm_mday: %i\n", dt->tm_mday);
153 dev_dbg(dev, "tm_mon : %i\n", dt->tm_mon);
154 dev_dbg(dev, "tm_year: %i\n", dt->tm_year);
155#endif
156
157 ds3234_set_reg(dev, DS3234_REG_SECONDS, bin2bcd(dt->tm_sec));
158 ds3234_set_reg(dev, DS3234_REG_MINUTES, bin2bcd(dt->tm_min));
159 ds3234_set_reg(dev, DS3234_REG_HOURS, bin2bcd(dt->tm_hour) & 0x3f);
160
161 /* 0 = Sun */
162 ds3234_set_reg(dev, DS3234_REG_DAY, bin2bcd(dt->tm_wday + 1));
163 ds3234_set_reg(dev, DS3234_REG_DATE, bin2bcd(dt->tm_mday));
164
165 /* 0 = Jan */
166 ds3234_set_reg(dev, DS3234_REG_MONTH, bin2bcd(dt->tm_mon + 1));
167
168 /* Assume 20YY although we just want to make sure not to go negative. */
169 if (dt->tm_year > 100)
170 dt->tm_year -= 100;
171
172 ds3234_set_reg(dev, DS3234_REG_YEAR, bin2bcd(dt->tm_year));
173
174 return 0;
175}
176
177static int ds3234_read_time(struct device *dev, struct rtc_time *tm)
178{
179 return ds3234_get_datetime(dev, tm);
180}
181
182static int ds3234_set_time(struct device *dev, struct rtc_time *tm)
183{
184 return ds3234_set_datetime(dev, tm);
185}
186
187static const struct rtc_class_ops ds3234_rtc_ops = {
188 .read_time = ds3234_read_time,
189 .set_time = ds3234_set_time,
190};
191
192static int ds3234_probe(struct spi_device *spi)
193{
194 struct rtc_device *rtc;
195 unsigned char tmp;
196 struct ds3234 *chip;
197 int res;
198
199 rtc = rtc_device_register("ds3234",
200 &spi->dev, &ds3234_rtc_ops, THIS_MODULE);
201 if (IS_ERR(rtc))
202 return PTR_ERR(rtc);
203
204 spi->mode = SPI_MODE_3;
205 spi->bits_per_word = 8;
206 spi_setup(spi);
207
208 chip = kzalloc(sizeof(struct ds3234), GFP_KERNEL);
209 if (!chip) {
210 rtc_device_unregister(rtc);
211 return -ENOMEM;
212 }
213 chip->rtc = rtc;
214 dev_set_drvdata(&spi->dev, chip);
215
216 res = ds3234_get_reg(&spi->dev, DS3234_REG_SECONDS, &tmp);
217 if (res) {
218 rtc_device_unregister(rtc);
219 return res;
220 }
221
222 /* Control settings
223 *
224 * CONTROL_REG
225 * BIT 7 6 5 4 3 2 1 0
226 * EOSC BBSQW CONV RS2 RS1 INTCN A2IE A1IE
227 *
228 * 0 0 0 1 1 1 0 0
229 *
230 * CONTROL_STAT_REG
231 * BIT 7 6 5 4 3 2 1 0
232 * OSF BB32kHz CRATE1 CRATE0 EN32kHz BSY A2F A1F
233 *
234 * 1 0 0 0 1 0 0 0
235 */
236 ds3234_get_reg(&spi->dev, DS3234_REG_CONTROL, &tmp);
237 ds3234_set_reg(&spi->dev, DS3234_REG_CONTROL, tmp & 0x1c);
238
239 ds3234_get_reg(&spi->dev, DS3234_REG_CONT_STAT, &tmp);
240 ds3234_set_reg(&spi->dev, DS3234_REG_CONT_STAT, tmp & 0x88);
241
242 /* Print our settings */
243 ds3234_get_reg(&spi->dev, DS3234_REG_CONTROL, &tmp);
244 dev_info(&spi->dev, "Control Reg: 0x%02x\n", tmp);
245
246 ds3234_get_reg(&spi->dev, DS3234_REG_CONT_STAT, &tmp);
247 dev_info(&spi->dev, "Ctrl/Stat Reg: 0x%02x\n", tmp);
248
249 return 0;
250}
251
252static int __exit ds3234_remove(struct spi_device *spi)
253{
254 struct ds3234 *chip = platform_get_drvdata(spi);
255 struct rtc_device *rtc = chip->rtc;
256
257 if (rtc)
258 rtc_device_unregister(rtc);
259
260 kfree(chip);
261
262 return 0;
263}
264
265static struct spi_driver ds3234_driver = {
266 .driver = {
267 .name = "ds3234",
268 .bus = &spi_bus_type,
269 .owner = THIS_MODULE,
270 },
271 .probe = ds3234_probe,
272 .remove = __devexit_p(ds3234_remove),
273};
274
275static __init int ds3234_init(void)
276{
277 printk(KERN_INFO "DS3234 SPI RTC Driver\n");
278 return spi_register_driver(&ds3234_driver);
279}
280module_init(ds3234_init);
281
282static __exit void ds3234_exit(void)
283{
284 spi_unregister_driver(&ds3234_driver);
285}
286module_exit(ds3234_exit);
287
288MODULE_DESCRIPTION("DS3234 SPI RTC driver");
289MODULE_AUTHOR("Dennis Aberilla <denzzzhome@yahoo.com>");
290MODULE_LICENSE("GPL");
diff --git a/drivers/rtc/rtc-m41t80.c b/drivers/rtc/rtc-m41t80.c
index 24bc1689fc74..470fb2d29545 100644
--- a/drivers/rtc/rtc-m41t80.c
+++ b/drivers/rtc/rtc-m41t80.c
@@ -56,21 +56,27 @@
56#define M41T80_ALHOUR_HT (1 << 6) /* HT: Halt Update Bit */ 56#define M41T80_ALHOUR_HT (1 << 6) /* HT: Halt Update Bit */
57#define M41T80_FLAGS_AF (1 << 6) /* AF: Alarm Flag Bit */ 57#define M41T80_FLAGS_AF (1 << 6) /* AF: Alarm Flag Bit */
58#define M41T80_FLAGS_BATT_LOW (1 << 4) /* BL: Battery Low Bit */ 58#define M41T80_FLAGS_BATT_LOW (1 << 4) /* BL: Battery Low Bit */
59#define M41T80_WATCHDOG_RB2 (1 << 7) /* RB: Watchdog resolution */
60#define M41T80_WATCHDOG_RB1 (1 << 1) /* RB: Watchdog resolution */
61#define M41T80_WATCHDOG_RB0 (1 << 0) /* RB: Watchdog resolution */
59 62
60#define M41T80_FEATURE_HT (1 << 0) 63#define M41T80_FEATURE_HT (1 << 0) /* Halt feature */
61#define M41T80_FEATURE_BL (1 << 1) 64#define M41T80_FEATURE_BL (1 << 1) /* Battery low indicator */
65#define M41T80_FEATURE_SQ (1 << 2) /* Squarewave feature */
66#define M41T80_FEATURE_WD (1 << 3) /* Extra watchdog resolution */
62 67
63#define DRV_VERSION "0.05" 68#define DRV_VERSION "0.05"
64 69
65static const struct i2c_device_id m41t80_id[] = { 70static const struct i2c_device_id m41t80_id[] = {
66 { "m41t80", 0 }, 71 { "m41t65", M41T80_FEATURE_HT | M41T80_FEATURE_WD },
67 { "m41t81", M41T80_FEATURE_HT }, 72 { "m41t80", M41T80_FEATURE_SQ },
68 { "m41t81s", M41T80_FEATURE_HT | M41T80_FEATURE_BL }, 73 { "m41t81", M41T80_FEATURE_HT | M41T80_FEATURE_SQ},
69 { "m41t82", M41T80_FEATURE_HT | M41T80_FEATURE_BL }, 74 { "m41t81s", M41T80_FEATURE_HT | M41T80_FEATURE_BL | M41T80_FEATURE_SQ },
70 { "m41t83", M41T80_FEATURE_HT | M41T80_FEATURE_BL }, 75 { "m41t82", M41T80_FEATURE_HT | M41T80_FEATURE_BL | M41T80_FEATURE_SQ },
71 { "m41st84", M41T80_FEATURE_HT | M41T80_FEATURE_BL }, 76 { "m41t83", M41T80_FEATURE_HT | M41T80_FEATURE_BL | M41T80_FEATURE_SQ },
72 { "m41st85", M41T80_FEATURE_HT | M41T80_FEATURE_BL }, 77 { "m41st84", M41T80_FEATURE_HT | M41T80_FEATURE_BL | M41T80_FEATURE_SQ },
73 { "m41st87", M41T80_FEATURE_HT | M41T80_FEATURE_BL }, 78 { "m41st85", M41T80_FEATURE_HT | M41T80_FEATURE_BL | M41T80_FEATURE_SQ },
79 { "m41st87", M41T80_FEATURE_HT | M41T80_FEATURE_BL | M41T80_FEATURE_SQ },
74 { } 80 { }
75}; 81};
76MODULE_DEVICE_TABLE(i2c, m41t80_id); 82MODULE_DEVICE_TABLE(i2c, m41t80_id);
@@ -386,8 +392,12 @@ static ssize_t m41t80_sysfs_show_sqwfreq(struct device *dev,
386 struct device_attribute *attr, char *buf) 392 struct device_attribute *attr, char *buf)
387{ 393{
388 struct i2c_client *client = to_i2c_client(dev); 394 struct i2c_client *client = to_i2c_client(dev);
395 struct m41t80_data *clientdata = i2c_get_clientdata(client);
389 int val; 396 int val;
390 397
398 if (!(clientdata->features & M41T80_FEATURE_SQ))
399 return -EINVAL;
400
391 val = i2c_smbus_read_byte_data(client, M41T80_REG_SQW); 401 val = i2c_smbus_read_byte_data(client, M41T80_REG_SQW);
392 if (val < 0) 402 if (val < 0)
393 return -EIO; 403 return -EIO;
@@ -408,9 +418,13 @@ static ssize_t m41t80_sysfs_set_sqwfreq(struct device *dev,
408 const char *buf, size_t count) 418 const char *buf, size_t count)
409{ 419{
410 struct i2c_client *client = to_i2c_client(dev); 420 struct i2c_client *client = to_i2c_client(dev);
421 struct m41t80_data *clientdata = i2c_get_clientdata(client);
411 int almon, sqw; 422 int almon, sqw;
412 int val = simple_strtoul(buf, NULL, 0); 423 int val = simple_strtoul(buf, NULL, 0);
413 424
425 if (!(clientdata->features & M41T80_FEATURE_SQ))
426 return -EINVAL;
427
414 if (val) { 428 if (val) {
415 if (!is_power_of_2(val)) 429 if (!is_power_of_2(val))
416 return -EINVAL; 430 return -EINVAL;
@@ -499,6 +513,8 @@ static void wdt_ping(void)
499 .buf = i2c_data, 513 .buf = i2c_data,
500 }, 514 },
501 }; 515 };
516 struct m41t80_data *clientdata = i2c_get_clientdata(save_client);
517
502 i2c_data[0] = 0x09; /* watchdog register */ 518 i2c_data[0] = 0x09; /* watchdog register */
503 519
504 if (wdt_margin > 31) 520 if (wdt_margin > 31)
@@ -509,6 +525,13 @@ static void wdt_ping(void)
509 */ 525 */
510 i2c_data[1] = wdt_margin<<2 | 0x82; 526 i2c_data[1] = wdt_margin<<2 | 0x82;
511 527
528 /*
529 * M41T65 has three bits for watchdog resolution. Don't set bit 7, as
530 * that would be an invalid resolution.
531 */
532 if (clientdata->features & M41T80_FEATURE_WD)
533 i2c_data[1] &= ~M41T80_WATCHDOG_RB2;
534
512 i2c_transfer(save_client->adapter, msgs1, 1); 535 i2c_transfer(save_client->adapter, msgs1, 1);
513} 536}
514 537
diff --git a/drivers/rtc/rtc-m48t35.c b/drivers/rtc/rtc-m48t35.c
new file mode 100644
index 000000000000..0b2197559940
--- /dev/null
+++ b/drivers/rtc/rtc-m48t35.c
@@ -0,0 +1,235 @@
1/*
2 * Driver for the SGS-Thomson M48T35 Timekeeper RAM chip
3 *
4 * Copyright (C) 2000 Silicon Graphics, Inc.
5 * Written by Ulf Carlsson (ulfc@engr.sgi.com)
6 *
7 * Copyright (C) 2008 Thomas Bogendoerfer
8 *
9 * Based on code written by Paul Gortmaker.
10 *
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the
13 * Free Software Foundation; either version 2 of the License, or (at your
14 * option) any later version.
15 */
16
17#include <linux/module.h>
18#include <linux/rtc.h>
19#include <linux/platform_device.h>
20#include <linux/bcd.h>
21#include <linux/io.h>
22
23#define DRV_VERSION "1.0"
24
25struct m48t35_rtc {
26 u8 pad[0x7ff8]; /* starts at 0x7ff8 */
27 u8 control;
28 u8 sec;
29 u8 min;
30 u8 hour;
31 u8 day;
32 u8 date;
33 u8 month;
34 u8 year;
35};
36
37#define M48T35_RTC_SET 0x80
38#define M48T35_RTC_READ 0x40
39
40struct m48t35_priv {
41 struct rtc_device *rtc;
42 struct m48t35_rtc __iomem *reg;
43 size_t size;
44 unsigned long baseaddr;
45 spinlock_t lock;
46};
47
48static int m48t35_read_time(struct device *dev, struct rtc_time *tm)
49{
50 struct m48t35_priv *priv = dev_get_drvdata(dev);
51 u8 control;
52
53 /*
54 * Only the values that we read from the RTC are set. We leave
55 * tm_wday, tm_yday and tm_isdst untouched. Even though the
56 * RTC has RTC_DAY_OF_WEEK, we ignore it, as it is only updated
57 * by the RTC when initially set to a non-zero value.
58 */
59 spin_lock_irq(&priv->lock);
60 control = readb(&priv->reg->control);
61 writeb(control | M48T35_RTC_READ, &priv->reg->control);
62 tm->tm_sec = readb(&priv->reg->sec);
63 tm->tm_min = readb(&priv->reg->min);
64 tm->tm_hour = readb(&priv->reg->hour);
65 tm->tm_mday = readb(&priv->reg->date);
66 tm->tm_mon = readb(&priv->reg->month);
67 tm->tm_year = readb(&priv->reg->year);
68 writeb(control, &priv->reg->control);
69 spin_unlock_irq(&priv->lock);
70
71 tm->tm_sec = bcd2bin(tm->tm_sec);
72 tm->tm_min = bcd2bin(tm->tm_min);
73 tm->tm_hour = bcd2bin(tm->tm_hour);
74 tm->tm_mday = bcd2bin(tm->tm_mday);
75 tm->tm_mon = bcd2bin(tm->tm_mon);
76 tm->tm_year = bcd2bin(tm->tm_year);
77
78 /*
79 * Account for differences between how the RTC uses the values
80 * and how they are defined in a struct rtc_time;
81 */
82 tm->tm_year += 70;
83 if (tm->tm_year <= 69)
84 tm->tm_year += 100;
85
86 tm->tm_mon--;
87 return rtc_valid_tm(tm);
88}
89
90static int m48t35_set_time(struct device *dev, struct rtc_time *tm)
91{
92 struct m48t35_priv *priv = dev_get_drvdata(dev);
93 unsigned char mon, day, hrs, min, sec;
94 unsigned int yrs;
95 u8 control;
96
97 yrs = tm->tm_year + 1900;
98 mon = tm->tm_mon + 1; /* tm_mon starts at zero */
99 day = tm->tm_mday;
100 hrs = tm->tm_hour;
101 min = tm->tm_min;
102 sec = tm->tm_sec;
103
104 if (yrs < 1970)
105 return -EINVAL;
106
107 yrs -= 1970;
108 if (yrs > 255) /* They are unsigned */
109 return -EINVAL;
110
111 if (yrs > 169)
112 return -EINVAL;
113
114 if (yrs >= 100)
115 yrs -= 100;
116
117 sec = bin2bcd(sec);
118 min = bin2bcd(min);
119 hrs = bin2bcd(hrs);
120 day = bin2bcd(day);
121 mon = bin2bcd(mon);
122 yrs = bin2bcd(yrs);
123
124 spin_lock_irq(&priv->lock);
125 control = readb(&priv->reg->control);
126 writeb(control | M48T35_RTC_SET, &priv->reg->control);
127 writeb(yrs, &priv->reg->year);
128 writeb(mon, &priv->reg->month);
129 writeb(day, &priv->reg->date);
130 writeb(hrs, &priv->reg->hour);
131 writeb(min, &priv->reg->min);
132 writeb(sec, &priv->reg->sec);
133 writeb(control, &priv->reg->control);
134 spin_unlock_irq(&priv->lock);
135 return 0;
136}
137
138static const struct rtc_class_ops m48t35_ops = {
139 .read_time = m48t35_read_time,
140 .set_time = m48t35_set_time,
141};
142
143static int __devinit m48t35_probe(struct platform_device *pdev)
144{
145 struct rtc_device *rtc;
146 struct resource *res;
147 struct m48t35_priv *priv;
148 int ret = 0;
149
150 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
151 if (!res)
152 return -ENODEV;
153 priv = kzalloc(sizeof(struct m48t35_priv), GFP_KERNEL);
154 if (!priv)
155 return -ENOMEM;
156
157 priv->size = res->end - res->start + 1;
158 /*
159 * kludge: remove the #ifndef after ioc3 resource
160 * conflicts are resolved
161 */
162#ifndef CONFIG_SGI_IP27
163 if (!request_mem_region(res->start, priv->size, pdev->name)) {
164 ret = -EBUSY;
165 goto out;
166 }
167#endif
168 priv->baseaddr = res->start;
169 priv->reg = ioremap(priv->baseaddr, priv->size);
170 if (!priv->reg) {
171 ret = -ENOMEM;
172 goto out;
173 }
174 spin_lock_init(&priv->lock);
175 rtc = rtc_device_register("m48t35", &pdev->dev,
176 &m48t35_ops, THIS_MODULE);
177 if (IS_ERR(rtc)) {
178 ret = PTR_ERR(rtc);
179 goto out;
180 }
181 priv->rtc = rtc;
182 platform_set_drvdata(pdev, priv);
183 return 0;
184
185out:
186 if (priv->rtc)
187 rtc_device_unregister(priv->rtc);
188 if (priv->reg)
189 iounmap(priv->reg);
190 if (priv->baseaddr)
191 release_mem_region(priv->baseaddr, priv->size);
192 kfree(priv);
193 return ret;
194}
195
196static int __devexit m48t35_remove(struct platform_device *pdev)
197{
198 struct m48t35_priv *priv = platform_get_drvdata(pdev);
199
200 rtc_device_unregister(priv->rtc);
201 iounmap(priv->reg);
202#ifndef CONFIG_SGI_IP27
203 release_mem_region(priv->baseaddr, priv->size);
204#endif
205 kfree(priv);
206 return 0;
207}
208
209static struct platform_driver m48t35_platform_driver = {
210 .driver = {
211 .name = "rtc-m48t35",
212 .owner = THIS_MODULE,
213 },
214 .probe = m48t35_probe,
215 .remove = __devexit_p(m48t35_remove),
216};
217
218static int __init m48t35_init(void)
219{
220 return platform_driver_register(&m48t35_platform_driver);
221}
222
223static void __exit m48t35_exit(void)
224{
225 platform_driver_unregister(&m48t35_platform_driver);
226}
227
228MODULE_AUTHOR("Thomas Bogendoerfer <tsbogend@alpha.franken.de>");
229MODULE_DESCRIPTION("M48T35 RTC driver");
230MODULE_LICENSE("GPL");
231MODULE_VERSION(DRV_VERSION);
232MODULE_ALIAS("platform:rtc-m48t35");
233
234module_init(m48t35_init);
235module_exit(m48t35_exit);
diff --git a/drivers/rtc/rtc-m48t59.c b/drivers/rtc/rtc-m48t59.c
index 013e6c103b9c..ce4eff6a8d51 100644
--- a/drivers/rtc/rtc-m48t59.c
+++ b/drivers/rtc/rtc-m48t59.c
@@ -24,8 +24,9 @@
24#define NO_IRQ (-1) 24#define NO_IRQ (-1)
25#endif 25#endif
26 26
27#define M48T59_READ(reg) pdata->read_byte(dev, reg) 27#define M48T59_READ(reg) (pdata->read_byte(dev, pdata->offset + reg))
28#define M48T59_WRITE(val, reg) pdata->write_byte(dev, reg, val) 28#define M48T59_WRITE(val, reg) \
29 (pdata->write_byte(dev, pdata->offset + reg, val))
29 30
30#define M48T59_SET_BITS(mask, reg) \ 31#define M48T59_SET_BITS(mask, reg) \
31 M48T59_WRITE((M48T59_READ(reg) | (mask)), (reg)) 32 M48T59_WRITE((M48T59_READ(reg) | (mask)), (reg))
@@ -34,7 +35,6 @@
34 35
35struct m48t59_private { 36struct m48t59_private {
36 void __iomem *ioaddr; 37 void __iomem *ioaddr;
37 unsigned int size; /* iomem size */
38 int irq; 38 int irq;
39 struct rtc_device *rtc; 39 struct rtc_device *rtc;
40 spinlock_t lock; /* serialize the NVRAM and RTC access */ 40 spinlock_t lock; /* serialize the NVRAM and RTC access */
@@ -82,7 +82,8 @@ static int m48t59_rtc_read_time(struct device *dev, struct rtc_time *tm)
82 tm->tm_mday = BCD2BIN(M48T59_READ(M48T59_MDAY)); 82 tm->tm_mday = BCD2BIN(M48T59_READ(M48T59_MDAY));
83 83
84 val = M48T59_READ(M48T59_WDAY); 84 val = M48T59_READ(M48T59_WDAY);
85 if ((val & M48T59_WDAY_CEB) && (val & M48T59_WDAY_CB)) { 85 if ((pdata->type == M48T59RTC_TYPE_M48T59) &&
86 (val & M48T59_WDAY_CEB) && (val & M48T59_WDAY_CB)) {
86 dev_dbg(dev, "Century bit is enabled\n"); 87 dev_dbg(dev, "Century bit is enabled\n");
87 tm->tm_year += 100; /* one century */ 88 tm->tm_year += 100; /* one century */
88 } 89 }
@@ -126,7 +127,7 @@ static int m48t59_rtc_set_time(struct device *dev, struct rtc_time *tm)
126 M48T59_WRITE((BIN2BCD(tm->tm_mon + 1) & 0x1F), M48T59_MONTH); 127 M48T59_WRITE((BIN2BCD(tm->tm_mon + 1) & 0x1F), M48T59_MONTH);
127 M48T59_WRITE(BIN2BCD(tm->tm_year % 100), M48T59_YEAR); 128 M48T59_WRITE(BIN2BCD(tm->tm_year % 100), M48T59_YEAR);
128 129
129 if (tm->tm_year/100) 130 if (pdata->type == M48T59RTC_TYPE_M48T59 && (tm->tm_year / 100))
130 val = (M48T59_WDAY_CEB | M48T59_WDAY_CB); 131 val = (M48T59_WDAY_CEB | M48T59_WDAY_CB);
131 val |= (BIN2BCD(tm->tm_wday) & 0x07); 132 val |= (BIN2BCD(tm->tm_wday) & 0x07);
132 M48T59_WRITE(val, M48T59_WDAY); 133 M48T59_WRITE(val, M48T59_WDAY);
@@ -310,6 +311,11 @@ static const struct rtc_class_ops m48t59_rtc_ops = {
310 .proc = m48t59_rtc_proc, 311 .proc = m48t59_rtc_proc,
311}; 312};
312 313
314static const struct rtc_class_ops m48t02_rtc_ops = {
315 .read_time = m48t59_rtc_read_time,
316 .set_time = m48t59_rtc_set_time,
317};
318
313static ssize_t m48t59_nvram_read(struct kobject *kobj, 319static ssize_t m48t59_nvram_read(struct kobject *kobj,
314 struct bin_attribute *bin_attr, 320 struct bin_attribute *bin_attr,
315 char *buf, loff_t pos, size_t size) 321 char *buf, loff_t pos, size_t size)
@@ -321,7 +327,7 @@ static ssize_t m48t59_nvram_read(struct kobject *kobj,
321 ssize_t cnt = 0; 327 ssize_t cnt = 0;
322 unsigned long flags; 328 unsigned long flags;
323 329
324 for (; size > 0 && pos < M48T59_NVRAM_SIZE; cnt++, size--) { 330 for (; size > 0 && pos < pdata->offset; cnt++, size--) {
325 spin_lock_irqsave(&m48t59->lock, flags); 331 spin_lock_irqsave(&m48t59->lock, flags);
326 *buf++ = M48T59_READ(cnt); 332 *buf++ = M48T59_READ(cnt);
327 spin_unlock_irqrestore(&m48t59->lock, flags); 333 spin_unlock_irqrestore(&m48t59->lock, flags);
@@ -341,7 +347,7 @@ static ssize_t m48t59_nvram_write(struct kobject *kobj,
341 ssize_t cnt = 0; 347 ssize_t cnt = 0;
342 unsigned long flags; 348 unsigned long flags;
343 349
344 for (; size > 0 && pos < M48T59_NVRAM_SIZE; cnt++, size--) { 350 for (; size > 0 && pos < pdata->offset; cnt++, size--) {
345 spin_lock_irqsave(&m48t59->lock, flags); 351 spin_lock_irqsave(&m48t59->lock, flags);
346 M48T59_WRITE(*buf++, cnt); 352 M48T59_WRITE(*buf++, cnt);
347 spin_unlock_irqrestore(&m48t59->lock, flags); 353 spin_unlock_irqrestore(&m48t59->lock, flags);
@@ -358,7 +364,6 @@ static struct bin_attribute m48t59_nvram_attr = {
358 }, 364 },
359 .read = m48t59_nvram_read, 365 .read = m48t59_nvram_read,
360 .write = m48t59_nvram_write, 366 .write = m48t59_nvram_write,
361 .size = M48T59_NVRAM_SIZE,
362}; 367};
363 368
364static int __devinit m48t59_rtc_probe(struct platform_device *pdev) 369static int __devinit m48t59_rtc_probe(struct platform_device *pdev)
@@ -367,6 +372,8 @@ static int __devinit m48t59_rtc_probe(struct platform_device *pdev)
367 struct m48t59_private *m48t59 = NULL; 372 struct m48t59_private *m48t59 = NULL;
368 struct resource *res; 373 struct resource *res;
369 int ret = -ENOMEM; 374 int ret = -ENOMEM;
375 char *name;
376 const struct rtc_class_ops *ops;
370 377
371 /* This chip could be memory-mapped or I/O-mapped */ 378 /* This chip could be memory-mapped or I/O-mapped */
372 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 379 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -391,6 +398,8 @@ static int __devinit m48t59_rtc_probe(struct platform_device *pdev)
391 /* Ensure we only kmalloc platform data once */ 398 /* Ensure we only kmalloc platform data once */
392 pdev->dev.platform_data = pdata; 399 pdev->dev.platform_data = pdata;
393 } 400 }
401 if (!pdata->type)
402 pdata->type = M48T59RTC_TYPE_M48T59;
394 403
395 /* Try to use the generic memory read/write ops */ 404 /* Try to use the generic memory read/write ops */
396 if (!pdata->write_byte) 405 if (!pdata->write_byte)
@@ -403,10 +412,14 @@ static int __devinit m48t59_rtc_probe(struct platform_device *pdev)
403 if (!m48t59) 412 if (!m48t59)
404 return -ENOMEM; 413 return -ENOMEM;
405 414
406 m48t59->size = res->end - res->start + 1; 415 m48t59->ioaddr = pdata->ioaddr;
407 m48t59->ioaddr = ioremap(res->start, m48t59->size); 416
408 if (!m48t59->ioaddr) 417 if (!m48t59->ioaddr) {
409 goto out; 418 /* ioaddr not mapped externally */
419 m48t59->ioaddr = ioremap(res->start, res->end - res->start + 1);
420 if (!m48t59->ioaddr)
421 goto out;
422 }
410 423
411 /* Try to get irq number. We also can work in 424 /* Try to get irq number. We also can work in
412 * the mode without IRQ. 425 * the mode without IRQ.
@@ -421,14 +434,36 @@ static int __devinit m48t59_rtc_probe(struct platform_device *pdev)
421 if (ret) 434 if (ret)
422 goto out; 435 goto out;
423 } 436 }
437 switch (pdata->type) {
438 case M48T59RTC_TYPE_M48T59:
439 name = "m48t59";
440 ops = &m48t59_rtc_ops;
441 pdata->offset = 0x1ff0;
442 break;
443 case M48T59RTC_TYPE_M48T02:
444 name = "m48t02";
445 ops = &m48t02_rtc_ops;
446 pdata->offset = 0x7f0;
447 break;
448 case M48T59RTC_TYPE_M48T08:
449 name = "m48t08";
450 ops = &m48t02_rtc_ops;
451 pdata->offset = 0x1ff0;
452 break;
453 default:
454 dev_err(&pdev->dev, "Unknown RTC type\n");
455 ret = -ENODEV;
456 goto out;
457 }
424 458
425 m48t59->rtc = rtc_device_register("m48t59", &pdev->dev, 459 m48t59->rtc = rtc_device_register(name, &pdev->dev, ops, THIS_MODULE);
426 &m48t59_rtc_ops, THIS_MODULE);
427 if (IS_ERR(m48t59->rtc)) { 460 if (IS_ERR(m48t59->rtc)) {
428 ret = PTR_ERR(m48t59->rtc); 461 ret = PTR_ERR(m48t59->rtc);
429 goto out; 462 goto out;
430 } 463 }
431 464
465 m48t59_nvram_attr.size = pdata->offset;
466
432 ret = sysfs_create_bin_file(&pdev->dev.kobj, &m48t59_nvram_attr); 467 ret = sysfs_create_bin_file(&pdev->dev.kobj, &m48t59_nvram_attr);
433 if (ret) 468 if (ret)
434 goto out; 469 goto out;
@@ -452,11 +487,12 @@ out:
452static int __devexit m48t59_rtc_remove(struct platform_device *pdev) 487static int __devexit m48t59_rtc_remove(struct platform_device *pdev)
453{ 488{
454 struct m48t59_private *m48t59 = platform_get_drvdata(pdev); 489 struct m48t59_private *m48t59 = platform_get_drvdata(pdev);
490 struct m48t59_plat_data *pdata = pdev->dev.platform_data;
455 491
456 sysfs_remove_bin_file(&pdev->dev.kobj, &m48t59_nvram_attr); 492 sysfs_remove_bin_file(&pdev->dev.kobj, &m48t59_nvram_attr);
457 if (!IS_ERR(m48t59->rtc)) 493 if (!IS_ERR(m48t59->rtc))
458 rtc_device_unregister(m48t59->rtc); 494 rtc_device_unregister(m48t59->rtc);
459 if (m48t59->ioaddr) 495 if (m48t59->ioaddr && !pdata->ioaddr)
460 iounmap(m48t59->ioaddr); 496 iounmap(m48t59->ioaddr);
461 if (m48t59->irq != NO_IRQ) 497 if (m48t59->irq != NO_IRQ)
462 free_irq(m48t59->irq, &pdev->dev); 498 free_irq(m48t59->irq, &pdev->dev);
@@ -491,5 +527,5 @@ module_init(m48t59_rtc_init);
491module_exit(m48t59_rtc_exit); 527module_exit(m48t59_rtc_exit);
492 528
493MODULE_AUTHOR("Mark Zhan <rongkai.zhan@windriver.com>"); 529MODULE_AUTHOR("Mark Zhan <rongkai.zhan@windriver.com>");
494MODULE_DESCRIPTION("M48T59 RTC driver"); 530MODULE_DESCRIPTION("M48T59/M48T02/M48T08 RTC driver");
495MODULE_LICENSE("GPL"); 531MODULE_LICENSE("GPL");
diff --git a/drivers/rtc/rtc-max6900.c b/drivers/rtc/rtc-max6900.c
index ded3c0abad83..12c9cd25cad8 100644
--- a/drivers/rtc/rtc-max6900.c
+++ b/drivers/rtc/rtc-max6900.c
@@ -17,19 +17,18 @@
17#include <linux/rtc.h> 17#include <linux/rtc.h>
18#include <linux/delay.h> 18#include <linux/delay.h>
19 19
20#define DRV_NAME "max6900" 20#define DRV_VERSION "0.2"
21#define DRV_VERSION "0.1"
22 21
23/* 22/*
24 * register indices 23 * register indices
25 */ 24 */
26#define MAX6900_REG_SC 0 /* seconds 00-59 */ 25#define MAX6900_REG_SC 0 /* seconds 00-59 */
27#define MAX6900_REG_MN 1 /* minutes 00-59 */ 26#define MAX6900_REG_MN 1 /* minutes 00-59 */
28#define MAX6900_REG_HR 2 /* hours 00-23 */ 27#define MAX6900_REG_HR 2 /* hours 00-23 */
29#define MAX6900_REG_DT 3 /* day of month 00-31 */ 28#define MAX6900_REG_DT 3 /* day of month 00-31 */
30#define MAX6900_REG_MO 4 /* month 01-12 */ 29#define MAX6900_REG_MO 4 /* month 01-12 */
31#define MAX6900_REG_DW 5 /* day of week 1-7 */ 30#define MAX6900_REG_DW 5 /* day of week 1-7 */
32#define MAX6900_REG_YR 6 /* year 00-99 */ 31#define MAX6900_REG_YR 6 /* year 00-99 */
33#define MAX6900_REG_CT 7 /* control */ 32#define MAX6900_REG_CT 7 /* control */
34 /* register 8 is undocumented */ 33 /* register 8 is undocumented */
35#define MAX6900_REG_CENTURY 9 /* century */ 34#define MAX6900_REG_CENTURY 9 /* century */
@@ -39,7 +38,6 @@
39 38
40#define MAX6900_REG_CT_WP (1 << 7) /* Write Protect */ 39#define MAX6900_REG_CT_WP (1 << 7) /* Write Protect */
41 40
42
43/* 41/*
44 * register read/write commands 42 * register read/write commands
45 */ 43 */
@@ -52,16 +50,7 @@
52 50
53#define MAX6900_IDLE_TIME_AFTER_WRITE 3 /* specification says 2.5 mS */ 51#define MAX6900_IDLE_TIME_AFTER_WRITE 3 /* specification says 2.5 mS */
54 52
55#define MAX6900_I2C_ADDR 0xa0 53static struct i2c_driver max6900_driver;
56
57static const unsigned short normal_i2c[] = {
58 MAX6900_I2C_ADDR >> 1,
59 I2C_CLIENT_END
60};
61
62I2C_CLIENT_INSMOD; /* defines addr_data */
63
64static int max6900_probe(struct i2c_adapter *adapter, int addr, int kind);
65 54
66static int max6900_i2c_read_regs(struct i2c_client *client, u8 *buf) 55static int max6900_i2c_read_regs(struct i2c_client *client, u8 *buf)
67{ 56{
@@ -69,36 +58,35 @@ static int max6900_i2c_read_regs(struct i2c_client *client, u8 *buf)
69 u8 reg_century_read[1] = { MAX6900_REG_CENTURY_READ }; 58 u8 reg_century_read[1] = { MAX6900_REG_CENTURY_READ };
70 struct i2c_msg msgs[4] = { 59 struct i2c_msg msgs[4] = {
71 { 60 {
72 .addr = client->addr, 61 .addr = client->addr,
73 .flags = 0, /* write */ 62 .flags = 0, /* write */
74 .len = sizeof(reg_burst_read), 63 .len = sizeof(reg_burst_read),
75 .buf = reg_burst_read 64 .buf = reg_burst_read}
76 }, 65 ,
77 { 66 {
78 .addr = client->addr, 67 .addr = client->addr,
79 .flags = I2C_M_RD, 68 .flags = I2C_M_RD,
80 .len = MAX6900_BURST_LEN, 69 .len = MAX6900_BURST_LEN,
81 .buf = buf 70 .buf = buf}
82 }, 71 ,
83 { 72 {
84 .addr = client->addr, 73 .addr = client->addr,
85 .flags = 0, /* write */ 74 .flags = 0, /* write */
86 .len = sizeof(reg_century_read), 75 .len = sizeof(reg_century_read),
87 .buf = reg_century_read 76 .buf = reg_century_read}
88 }, 77 ,
89 { 78 {
90 .addr = client->addr, 79 .addr = client->addr,
91 .flags = I2C_M_RD, 80 .flags = I2C_M_RD,
92 .len = sizeof(buf[MAX6900_REG_CENTURY]), 81 .len = sizeof(buf[MAX6900_REG_CENTURY]),
93 .buf = &buf[MAX6900_REG_CENTURY] 82 .buf = &buf[MAX6900_REG_CENTURY]
94 } 83 }
95 }; 84 };
96 int rc; 85 int rc;
97 86
98 rc = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); 87 rc = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
99 if (rc != ARRAY_SIZE(msgs)) { 88 if (rc != ARRAY_SIZE(msgs)) {
100 dev_err(&client->dev, "%s: register read failed\n", 89 dev_err(&client->dev, "%s: register read failed\n", __func__);
101 __func__);
102 return -EIO; 90 return -EIO;
103 } 91 }
104 return 0; 92 return 0;
@@ -109,20 +97,18 @@ static int max6900_i2c_write_regs(struct i2c_client *client, u8 const *buf)
109 u8 i2c_century_buf[1 + 1] = { MAX6900_REG_CENTURY_WRITE }; 97 u8 i2c_century_buf[1 + 1] = { MAX6900_REG_CENTURY_WRITE };
110 struct i2c_msg century_msgs[1] = { 98 struct i2c_msg century_msgs[1] = {
111 { 99 {
112 .addr = client->addr, 100 .addr = client->addr,
113 .flags = 0, /* write */ 101 .flags = 0, /* write */
114 .len = sizeof(i2c_century_buf), 102 .len = sizeof(i2c_century_buf),
115 .buf = i2c_century_buf 103 .buf = i2c_century_buf}
116 }
117 }; 104 };
118 u8 i2c_burst_buf[MAX6900_BURST_LEN + 1] = { MAX6900_REG_BURST_WRITE }; 105 u8 i2c_burst_buf[MAX6900_BURST_LEN + 1] = { MAX6900_REG_BURST_WRITE };
119 struct i2c_msg burst_msgs[1] = { 106 struct i2c_msg burst_msgs[1] = {
120 { 107 {
121 .addr = client->addr, 108 .addr = client->addr,
122 .flags = 0, /* write */ 109 .flags = 0, /* write */
123 .len = sizeof(i2c_burst_buf), 110 .len = sizeof(i2c_burst_buf),
124 .buf = i2c_burst_buf 111 .buf = i2c_burst_buf}
125 }
126 }; 112 };
127 int rc; 113 int rc;
128 114
@@ -133,10 +119,12 @@ static int max6900_i2c_write_regs(struct i2c_client *client, u8 const *buf)
133 * bit as part of the burst write. 119 * bit as part of the burst write.
134 */ 120 */
135 i2c_century_buf[1] = buf[MAX6900_REG_CENTURY]; 121 i2c_century_buf[1] = buf[MAX6900_REG_CENTURY];
122
136 rc = i2c_transfer(client->adapter, century_msgs, 123 rc = i2c_transfer(client->adapter, century_msgs,
137 ARRAY_SIZE(century_msgs)); 124 ARRAY_SIZE(century_msgs));
138 if (rc != ARRAY_SIZE(century_msgs)) 125 if (rc != ARRAY_SIZE(century_msgs))
139 goto write_failed; 126 goto write_failed;
127
140 msleep(MAX6900_IDLE_TIME_AFTER_WRITE); 128 msleep(MAX6900_IDLE_TIME_AFTER_WRITE);
141 129
142 memcpy(&i2c_burst_buf[1], buf, MAX6900_BURST_LEN); 130 memcpy(&i2c_burst_buf[1], buf, MAX6900_BURST_LEN);
@@ -148,45 +136,11 @@ static int max6900_i2c_write_regs(struct i2c_client *client, u8 const *buf)
148 136
149 return 0; 137 return 0;
150 138
151write_failed: 139 write_failed:
152 dev_err(&client->dev, "%s: register write failed\n", 140 dev_err(&client->dev, "%s: register write failed\n", __func__);
153 __func__);
154 return -EIO; 141 return -EIO;
155} 142}
156 143
157static int max6900_i2c_validate_client(struct i2c_client *client)
158{
159 u8 regs[MAX6900_REG_LEN];
160 u8 zero_mask[] = {
161 0x80, /* seconds */
162 0x80, /* minutes */
163 0x40, /* hours */
164 0xc0, /* day of month */
165 0xe0, /* month */
166 0xf8, /* day of week */
167 0x00, /* year */
168 0x7f, /* control */
169 };
170 int i;
171 int rc;
172 int reserved;
173
174 reserved = i2c_smbus_read_byte_data(client, MAX6900_REG_RESERVED_READ);
175 if (reserved != 0x07)
176 return -ENODEV;
177
178 rc = max6900_i2c_read_regs(client, regs);
179 if (rc < 0)
180 return rc;
181
182 for (i = 0; i < ARRAY_SIZE(zero_mask); ++i) {
183 if (regs[i] & zero_mask[i])
184 return -ENODEV;
185 }
186
187 return 0;
188}
189
190static int max6900_i2c_read_time(struct i2c_client *client, struct rtc_time *tm) 144static int max6900_i2c_read_time(struct i2c_client *client, struct rtc_time *tm)
191{ 145{
192 int rc; 146 int rc;
@@ -202,7 +156,7 @@ static int max6900_i2c_read_time(struct i2c_client *client, struct rtc_time *tm)
202 tm->tm_mday = BCD2BIN(regs[MAX6900_REG_DT]); 156 tm->tm_mday = BCD2BIN(regs[MAX6900_REG_DT]);
203 tm->tm_mon = BCD2BIN(regs[MAX6900_REG_MO]) - 1; 157 tm->tm_mon = BCD2BIN(regs[MAX6900_REG_MO]) - 1;
204 tm->tm_year = BCD2BIN(regs[MAX6900_REG_YR]) + 158 tm->tm_year = BCD2BIN(regs[MAX6900_REG_YR]) +
205 BCD2BIN(regs[MAX6900_REG_CENTURY]) * 100 - 1900; 159 BCD2BIN(regs[MAX6900_REG_CENTURY]) * 100 - 1900;
206 tm->tm_wday = BCD2BIN(regs[MAX6900_REG_DW]); 160 tm->tm_wday = BCD2BIN(regs[MAX6900_REG_DW]);
207 161
208 return 0; 162 return 0;
@@ -211,7 +165,7 @@ static int max6900_i2c_read_time(struct i2c_client *client, struct rtc_time *tm)
211static int max6900_i2c_clear_write_protect(struct i2c_client *client) 165static int max6900_i2c_clear_write_protect(struct i2c_client *client)
212{ 166{
213 int rc; 167 int rc;
214 rc = i2c_smbus_write_byte_data (client, MAX6900_REG_CONTROL_WRITE, 0); 168 rc = i2c_smbus_write_byte_data(client, MAX6900_REG_CONTROL_WRITE, 0);
215 if (rc < 0) { 169 if (rc < 0) {
216 dev_err(&client->dev, "%s: control register write failed\n", 170 dev_err(&client->dev, "%s: control register write failed\n",
217 __func__); 171 __func__);
@@ -220,8 +174,8 @@ static int max6900_i2c_clear_write_protect(struct i2c_client *client)
220 return 0; 174 return 0;
221} 175}
222 176
223static int max6900_i2c_set_time(struct i2c_client *client, 177static int
224 struct rtc_time const *tm) 178max6900_i2c_set_time(struct i2c_client *client, struct rtc_time const *tm)
225{ 179{
226 u8 regs[MAX6900_REG_LEN]; 180 u8 regs[MAX6900_REG_LEN];
227 int rc; 181 int rc;
@@ -258,89 +212,49 @@ static int max6900_rtc_set_time(struct device *dev, struct rtc_time *tm)
258 return max6900_i2c_set_time(to_i2c_client(dev), tm); 212 return max6900_i2c_set_time(to_i2c_client(dev), tm);
259} 213}
260 214
261static int max6900_attach_adapter(struct i2c_adapter *adapter) 215static int max6900_remove(struct i2c_client *client)
262{
263 return i2c_probe(adapter, &addr_data, max6900_probe);
264}
265
266static int max6900_detach_client(struct i2c_client *client)
267{ 216{
268 struct rtc_device *const rtc = i2c_get_clientdata(client); 217 struct rtc_device *rtc = i2c_get_clientdata(client);
269 218
270 if (rtc) 219 if (rtc)
271 rtc_device_unregister(rtc); 220 rtc_device_unregister(rtc);
272 221
273 return i2c_detach_client(client); 222 return 0;
274} 223}
275 224
276static struct i2c_driver max6900_driver = {
277 .driver = {
278 .name = DRV_NAME,
279 },
280 .id = I2C_DRIVERID_MAX6900,
281 .attach_adapter = max6900_attach_adapter,
282 .detach_client = max6900_detach_client,
283};
284
285static const struct rtc_class_ops max6900_rtc_ops = { 225static const struct rtc_class_ops max6900_rtc_ops = {
286 .read_time = max6900_rtc_read_time, 226 .read_time = max6900_rtc_read_time,
287 .set_time = max6900_rtc_set_time, 227 .set_time = max6900_rtc_set_time,
288}; 228};
289 229
290static int max6900_probe(struct i2c_adapter *adapter, int addr, int kind) 230static int
231max6900_probe(struct i2c_client *client, const struct i2c_device_id *id)
291{ 232{
292 int rc = 0; 233 struct rtc_device *rtc;
293 struct i2c_client *client = NULL;
294 struct rtc_device *rtc = NULL;
295
296 if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) {
297 rc = -ENODEV;
298 goto failout;
299 }
300
301 client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
302 if (client == NULL) {
303 rc = -ENOMEM;
304 goto failout;
305 }
306
307 client->addr = addr;
308 client->adapter = adapter;
309 client->driver = &max6900_driver;
310 strlcpy(client->name, DRV_NAME, I2C_NAME_SIZE);
311
312 if (kind < 0) {
313 rc = max6900_i2c_validate_client(client);
314 if (rc < 0)
315 goto failout;
316 }
317 234
318 rc = i2c_attach_client(client); 235 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
319 if (rc < 0) 236 return -ENODEV;
320 goto failout;
321 237
322 dev_info(&client->dev, 238 dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n");
323 "chip found, driver version " DRV_VERSION "\n");
324 239
325 rtc = rtc_device_register(max6900_driver.driver.name, 240 rtc = rtc_device_register(max6900_driver.driver.name,
326 &client->dev, 241 &client->dev, &max6900_rtc_ops, THIS_MODULE);
327 &max6900_rtc_ops, THIS_MODULE); 242 if (IS_ERR(rtc))
328 if (IS_ERR(rtc)) { 243 return PTR_ERR(rtc);
329 rc = PTR_ERR(rtc);
330 goto failout_detach;
331 }
332 244
333 i2c_set_clientdata(client, rtc); 245 i2c_set_clientdata(client, rtc);
334 246
335 return 0; 247 return 0;
336
337failout_detach:
338 i2c_detach_client(client);
339failout:
340 kfree(client);
341 return rc;
342} 248}
343 249
250static struct i2c_driver max6900_driver = {
251 .driver = {
252 .name = "rtc-max6900",
253 },
254 .probe = max6900_probe,
255 .remove = max6900_remove,
256};
257
344static int __init max6900_init(void) 258static int __init max6900_init(void)
345{ 259{
346 return i2c_add_driver(&max6900_driver); 260 return i2c_add_driver(&max6900_driver);
@@ -352,6 +266,7 @@ static void __exit max6900_exit(void)
352} 266}
353 267
354MODULE_DESCRIPTION("Maxim MAX6900 RTC driver"); 268MODULE_DESCRIPTION("Maxim MAX6900 RTC driver");
269MODULE_AUTHOR("Dale Farnsworth <dale@farnsworth.org>");
355MODULE_LICENSE("GPL"); 270MODULE_LICENSE("GPL");
356MODULE_VERSION(DRV_VERSION); 271MODULE_VERSION(DRV_VERSION);
357 272
diff --git a/drivers/rtc/rtc-pcf8563.c b/drivers/rtc/rtc-pcf8563.c
index 748a502a6355..a829f20ad6d6 100644
--- a/drivers/rtc/rtc-pcf8563.c
+++ b/drivers/rtc/rtc-pcf8563.c
@@ -179,58 +179,6 @@ struct pcf8563_limit
179 unsigned char max; 179 unsigned char max;
180}; 180};
181 181
182static int pcf8563_validate_client(struct i2c_client *client)
183{
184 int i;
185
186 static const struct pcf8563_limit pattern[] = {
187 /* register, mask, min, max */
188 { PCF8563_REG_SC, 0x7F, 0, 59 },
189 { PCF8563_REG_MN, 0x7F, 0, 59 },
190 { PCF8563_REG_HR, 0x3F, 0, 23 },
191 { PCF8563_REG_DM, 0x3F, 0, 31 },
192 { PCF8563_REG_MO, 0x1F, 0, 12 },
193 };
194
195 /* check limits (only registers with bcd values) */
196 for (i = 0; i < ARRAY_SIZE(pattern); i++) {
197 int xfer;
198 unsigned char value;
199 unsigned char buf = pattern[i].reg;
200
201 struct i2c_msg msgs[] = {
202 { client->addr, 0, 1, &buf },
203 { client->addr, I2C_M_RD, 1, &buf },
204 };
205
206 xfer = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
207
208 if (xfer != ARRAY_SIZE(msgs)) {
209 dev_err(&client->dev,
210 "%s: could not read register 0x%02X\n",
211 __func__, pattern[i].reg);
212
213 return -EIO;
214 }
215
216 value = BCD2BIN(buf & pattern[i].mask);
217
218 if (value > pattern[i].max ||
219 value < pattern[i].min) {
220 dev_dbg(&client->dev,
221 "%s: pattern=%d, reg=%x, mask=0x%02x, min=%d, "
222 "max=%d, value=%d, raw=0x%02X\n",
223 __func__, i, pattern[i].reg, pattern[i].mask,
224 pattern[i].min, pattern[i].max,
225 value, buf);
226
227 return -ENODEV;
228 }
229 }
230
231 return 0;
232}
233
234static int pcf8563_rtc_read_time(struct device *dev, struct rtc_time *tm) 182static int pcf8563_rtc_read_time(struct device *dev, struct rtc_time *tm)
235{ 183{
236 return pcf8563_get_datetime(to_i2c_client(dev), tm); 184 return pcf8563_get_datetime(to_i2c_client(dev), tm);
@@ -262,12 +210,6 @@ static int pcf8563_probe(struct i2c_client *client,
262 if (!pcf8563) 210 if (!pcf8563)
263 return -ENOMEM; 211 return -ENOMEM;
264 212
265 /* Verify the chip is really an PCF8563 */
266 if (pcf8563_validate_client(client) < 0) {
267 err = -ENODEV;
268 goto exit_kfree;
269 }
270
271 dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n"); 213 dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n");
272 214
273 pcf8563->rtc = rtc_device_register(pcf8563_driver.driver.name, 215 pcf8563->rtc = rtc_device_register(pcf8563_driver.driver.name,
diff --git a/drivers/rtc/rtc-pl030.c b/drivers/rtc/rtc-pl030.c
index 8448eeb9d675..826153552157 100644
--- a/drivers/rtc/rtc-pl030.c
+++ b/drivers/rtc/rtc-pl030.c
@@ -34,15 +34,6 @@ static irqreturn_t pl030_interrupt(int irq, void *dev_id)
34 return IRQ_HANDLED; 34 return IRQ_HANDLED;
35} 35}
36 36
37static int pl030_open(struct device *dev)
38{
39 return 0;
40}
41
42static void pl030_release(struct device *dev)
43{
44}
45
46static int pl030_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) 37static int pl030_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
47{ 38{
48 return -ENOIOCTLCMD; 39 return -ENOIOCTLCMD;
@@ -104,8 +95,6 @@ static int pl030_set_time(struct device *dev, struct rtc_time *tm)
104} 95}
105 96
106static const struct rtc_class_ops pl030_ops = { 97static const struct rtc_class_ops pl030_ops = {
107 .open = pl030_open,
108 .release = pl030_release,
109 .ioctl = pl030_ioctl, 98 .ioctl = pl030_ioctl,
110 .read_time = pl030_read_time, 99 .read_time = pl030_read_time,
111 .set_time = pl030_set_time, 100 .set_time = pl030_set_time,
diff --git a/drivers/rtc/rtc-pl031.c b/drivers/rtc/rtc-pl031.c
index 08b4610ec5a6..333eec689d2f 100644
--- a/drivers/rtc/rtc-pl031.c
+++ b/drivers/rtc/rtc-pl031.c
@@ -45,18 +45,6 @@ static irqreturn_t pl031_interrupt(int irq, void *dev_id)
45 return IRQ_HANDLED; 45 return IRQ_HANDLED;
46} 46}
47 47
48static int pl031_open(struct device *dev)
49{
50 /*
51 * We request IRQ in pl031_probe, so nothing to do here...
52 */
53 return 0;
54}
55
56static void pl031_release(struct device *dev)
57{
58}
59
60static int pl031_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) 48static int pl031_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
61{ 49{
62 struct pl031_local *ldata = dev_get_drvdata(dev); 50 struct pl031_local *ldata = dev_get_drvdata(dev);
@@ -118,8 +106,6 @@ static int pl031_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
118} 106}
119 107
120static const struct rtc_class_ops pl031_ops = { 108static const struct rtc_class_ops pl031_ops = {
121 .open = pl031_open,
122 .release = pl031_release,
123 .ioctl = pl031_ioctl, 109 .ioctl = pl031_ioctl,
124 .read_time = pl031_read_time, 110 .read_time = pl031_read_time,
125 .set_time = pl031_set_time, 111 .set_time = pl031_set_time,
diff --git a/drivers/rtc/rtc-rs5c372.c b/drivers/rtc/rtc-rs5c372.c
index 56caf6b2c3e5..8b561958fb1e 100644
--- a/drivers/rtc/rtc-rs5c372.c
+++ b/drivers/rtc/rtc-rs5c372.c
@@ -1,8 +1,9 @@
1/* 1/*
2 * An I2C driver for Ricoh RS5C372 and RV5C38[67] RTCs 2 * An I2C driver for Ricoh RS5C372, R2025S/D and RV5C38[67] RTCs
3 * 3 *
4 * Copyright (C) 2005 Pavel Mironchik <pmironchik@optifacio.net> 4 * Copyright (C) 2005 Pavel Mironchik <pmironchik@optifacio.net>
5 * Copyright (C) 2006 Tower Technologies 5 * Copyright (C) 2006 Tower Technologies
6 * Copyright (C) 2008 Paul Mundt
6 * 7 *
7 * This program is free software; you can redistribute it and/or modify 8 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as 9 * it under the terms of the GNU General Public License version 2 as
@@ -13,7 +14,7 @@
13#include <linux/rtc.h> 14#include <linux/rtc.h>
14#include <linux/bcd.h> 15#include <linux/bcd.h>
15 16
16#define DRV_VERSION "0.5" 17#define DRV_VERSION "0.6"
17 18
18 19
19/* 20/*
@@ -51,7 +52,8 @@
51# define RS5C_CTRL1_CT4 (4 << 0) /* 1 Hz level irq */ 52# define RS5C_CTRL1_CT4 (4 << 0) /* 1 Hz level irq */
52#define RS5C_REG_CTRL2 15 53#define RS5C_REG_CTRL2 15
53# define RS5C372_CTRL2_24 (1 << 5) 54# define RS5C372_CTRL2_24 (1 << 5)
54# define RS5C_CTRL2_XSTP (1 << 4) 55# define R2025_CTRL2_XST (1 << 5)
56# define RS5C_CTRL2_XSTP (1 << 4) /* only if !R2025S/D */
55# define RS5C_CTRL2_CTFG (1 << 2) 57# define RS5C_CTRL2_CTFG (1 << 2)
56# define RS5C_CTRL2_AAFG (1 << 1) /* or WAFG */ 58# define RS5C_CTRL2_AAFG (1 << 1) /* or WAFG */
57# define RS5C_CTRL2_BAFG (1 << 0) /* or DAFG */ 59# define RS5C_CTRL2_BAFG (1 << 0) /* or DAFG */
@@ -63,6 +65,7 @@
63 65
64enum rtc_type { 66enum rtc_type {
65 rtc_undef = 0, 67 rtc_undef = 0,
68 rtc_r2025sd,
66 rtc_rs5c372a, 69 rtc_rs5c372a,
67 rtc_rs5c372b, 70 rtc_rs5c372b,
68 rtc_rv5c386, 71 rtc_rv5c386,
@@ -70,6 +73,7 @@ enum rtc_type {
70}; 73};
71 74
72static const struct i2c_device_id rs5c372_id[] = { 75static const struct i2c_device_id rs5c372_id[] = {
76 { "r2025sd", rtc_r2025sd },
73 { "rs5c372a", rtc_rs5c372a }, 77 { "rs5c372a", rtc_rs5c372a },
74 { "rs5c372b", rtc_rs5c372b }, 78 { "rs5c372b", rtc_rs5c372b },
75 { "rv5c386", rtc_rv5c386 }, 79 { "rv5c386", rtc_rv5c386 },
@@ -89,6 +93,7 @@ struct rs5c372 {
89 enum rtc_type type; 93 enum rtc_type type;
90 unsigned time24:1; 94 unsigned time24:1;
91 unsigned has_irq:1; 95 unsigned has_irq:1;
96 unsigned smbus:1;
92 char buf[17]; 97 char buf[17];
93 char *regs; 98 char *regs;
94}; 99};
@@ -106,10 +111,25 @@ static int rs5c_get_regs(struct rs5c372 *rs5c)
106 * 111 *
107 * The first method doesn't work with the iop3xx adapter driver, on at 112 * The first method doesn't work with the iop3xx adapter driver, on at
108 * least 80219 chips; this works around that bug. 113 * least 80219 chips; this works around that bug.
114 *
115 * The third method on the other hand doesn't work for the SMBus-only
116 * configurations, so we use the the first method there, stripping off
117 * the extra register in the process.
109 */ 118 */
110 if ((i2c_transfer(client->adapter, msgs, 1)) != 1) { 119 if (rs5c->smbus) {
111 dev_warn(&client->dev, "can't read registers\n"); 120 int addr = RS5C_ADDR(RS5C372_REG_SECS);
112 return -EIO; 121 int size = sizeof(rs5c->buf) - 1;
122
123 if (i2c_smbus_read_i2c_block_data(client, addr, size,
124 rs5c->buf + 1) != size) {
125 dev_warn(&client->dev, "can't read registers\n");
126 return -EIO;
127 }
128 } else {
129 if ((i2c_transfer(client->adapter, msgs, 1)) != 1) {
130 dev_warn(&client->dev, "can't read registers\n");
131 return -EIO;
132 }
113 } 133 }
114 134
115 dev_dbg(&client->dev, 135 dev_dbg(&client->dev,
@@ -187,6 +207,7 @@ static int rs5c372_set_datetime(struct i2c_client *client, struct rtc_time *tm)
187{ 207{
188 struct rs5c372 *rs5c = i2c_get_clientdata(client); 208 struct rs5c372 *rs5c = i2c_get_clientdata(client);
189 unsigned char buf[8]; 209 unsigned char buf[8];
210 int addr;
190 211
191 dev_dbg(&client->dev, "%s: tm is secs=%d, mins=%d, hours=%d " 212 dev_dbg(&client->dev, "%s: tm is secs=%d, mins=%d, hours=%d "
192 "mday=%d, mon=%d, year=%d, wday=%d\n", 213 "mday=%d, mon=%d, year=%d, wday=%d\n",
@@ -194,16 +215,16 @@ static int rs5c372_set_datetime(struct i2c_client *client, struct rtc_time *tm)
194 tm->tm_sec, tm->tm_min, tm->tm_hour, 215 tm->tm_sec, tm->tm_min, tm->tm_hour,
195 tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday); 216 tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
196 217
197 buf[0] = RS5C_ADDR(RS5C372_REG_SECS); 218 addr = RS5C_ADDR(RS5C372_REG_SECS);
198 buf[1] = BIN2BCD(tm->tm_sec); 219 buf[0] = BIN2BCD(tm->tm_sec);
199 buf[2] = BIN2BCD(tm->tm_min); 220 buf[1] = BIN2BCD(tm->tm_min);
200 buf[3] = rs5c_hr2reg(rs5c, tm->tm_hour); 221 buf[2] = rs5c_hr2reg(rs5c, tm->tm_hour);
201 buf[4] = BIN2BCD(tm->tm_wday); 222 buf[3] = BIN2BCD(tm->tm_wday);
202 buf[5] = BIN2BCD(tm->tm_mday); 223 buf[4] = BIN2BCD(tm->tm_mday);
203 buf[6] = BIN2BCD(tm->tm_mon + 1); 224 buf[5] = BIN2BCD(tm->tm_mon + 1);
204 buf[7] = BIN2BCD(tm->tm_year - 100); 225 buf[6] = BIN2BCD(tm->tm_year - 100);
205 226
206 if ((i2c_master_send(client, buf, 8)) != 8) { 227 if (i2c_smbus_write_i2c_block_data(client, addr, sizeof(buf), buf) < 0) {
207 dev_err(&client->dev, "%s: write error\n", __func__); 228 dev_err(&client->dev, "%s: write error\n", __func__);
208 return -EIO; 229 return -EIO;
209 } 230 }
@@ -266,16 +287,16 @@ rs5c_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
266{ 287{
267 struct i2c_client *client = to_i2c_client(dev); 288 struct i2c_client *client = to_i2c_client(dev);
268 struct rs5c372 *rs5c = i2c_get_clientdata(client); 289 struct rs5c372 *rs5c = i2c_get_clientdata(client);
269 unsigned char buf[2]; 290 unsigned char buf;
270 int status; 291 int status, addr;
271 292
272 buf[1] = rs5c->regs[RS5C_REG_CTRL1]; 293 buf = rs5c->regs[RS5C_REG_CTRL1];
273 switch (cmd) { 294 switch (cmd) {
274 case RTC_UIE_OFF: 295 case RTC_UIE_OFF:
275 case RTC_UIE_ON: 296 case RTC_UIE_ON:
276 /* some 327a modes use a different IRQ pin for 1Hz irqs */ 297 /* some 327a modes use a different IRQ pin for 1Hz irqs */
277 if (rs5c->type == rtc_rs5c372a 298 if (rs5c->type == rtc_rs5c372a
278 && (buf[1] & RS5C372A_CTRL1_SL1)) 299 && (buf & RS5C372A_CTRL1_SL1))
279 return -ENOIOCTLCMD; 300 return -ENOIOCTLCMD;
280 case RTC_AIE_OFF: 301 case RTC_AIE_OFF:
281 case RTC_AIE_ON: 302 case RTC_AIE_ON:
@@ -293,28 +314,30 @@ rs5c_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
293 if (status < 0) 314 if (status < 0)
294 return status; 315 return status;
295 316
296 buf[0] = RS5C_ADDR(RS5C_REG_CTRL1); 317 addr = RS5C_ADDR(RS5C_REG_CTRL1);
297 switch (cmd) { 318 switch (cmd) {
298 case RTC_AIE_OFF: /* alarm off */ 319 case RTC_AIE_OFF: /* alarm off */
299 buf[1] &= ~RS5C_CTRL1_AALE; 320 buf &= ~RS5C_CTRL1_AALE;
300 break; 321 break;
301 case RTC_AIE_ON: /* alarm on */ 322 case RTC_AIE_ON: /* alarm on */
302 buf[1] |= RS5C_CTRL1_AALE; 323 buf |= RS5C_CTRL1_AALE;
303 break; 324 break;
304 case RTC_UIE_OFF: /* update off */ 325 case RTC_UIE_OFF: /* update off */
305 buf[1] &= ~RS5C_CTRL1_CT_MASK; 326 buf &= ~RS5C_CTRL1_CT_MASK;
306 break; 327 break;
307 case RTC_UIE_ON: /* update on */ 328 case RTC_UIE_ON: /* update on */
308 buf[1] &= ~RS5C_CTRL1_CT_MASK; 329 buf &= ~RS5C_CTRL1_CT_MASK;
309 buf[1] |= RS5C_CTRL1_CT4; 330 buf |= RS5C_CTRL1_CT4;
310 break; 331 break;
311 } 332 }
312 if ((i2c_master_send(client, buf, 2)) != 2) { 333
334 if (i2c_smbus_write_byte_data(client, addr, buf) < 0) {
313 printk(KERN_WARNING "%s: can't update alarm\n", 335 printk(KERN_WARNING "%s: can't update alarm\n",
314 rs5c->rtc->name); 336 rs5c->rtc->name);
315 status = -EIO; 337 status = -EIO;
316 } else 338 } else
317 rs5c->regs[RS5C_REG_CTRL1] = buf[1]; 339 rs5c->regs[RS5C_REG_CTRL1] = buf;
340
318 return status; 341 return status;
319} 342}
320 343
@@ -364,8 +387,8 @@ static int rs5c_set_alarm(struct device *dev, struct rtc_wkalrm *t)
364{ 387{
365 struct i2c_client *client = to_i2c_client(dev); 388 struct i2c_client *client = to_i2c_client(dev);
366 struct rs5c372 *rs5c = i2c_get_clientdata(client); 389 struct rs5c372 *rs5c = i2c_get_clientdata(client);
367 int status; 390 int status, addr, i;
368 unsigned char buf[4]; 391 unsigned char buf[3];
369 392
370 /* only handle up to 24 hours in the future, like RTC_ALM_SET */ 393 /* only handle up to 24 hours in the future, like RTC_ALM_SET */
371 if (t->time.tm_mday != -1 394 if (t->time.tm_mday != -1
@@ -380,33 +403,36 @@ static int rs5c_set_alarm(struct device *dev, struct rtc_wkalrm *t)
380 if (status < 0) 403 if (status < 0)
381 return status; 404 return status;
382 if (rs5c->regs[RS5C_REG_CTRL1] & RS5C_CTRL1_AALE) { 405 if (rs5c->regs[RS5C_REG_CTRL1] & RS5C_CTRL1_AALE) {
383 buf[0] = RS5C_ADDR(RS5C_REG_CTRL1); 406 addr = RS5C_ADDR(RS5C_REG_CTRL1);
384 buf[1] = rs5c->regs[RS5C_REG_CTRL1] & ~RS5C_CTRL1_AALE; 407 buf[0] = rs5c->regs[RS5C_REG_CTRL1] & ~RS5C_CTRL1_AALE;
385 if (i2c_master_send(client, buf, 2) != 2) { 408 if (i2c_smbus_write_byte_data(client, addr, buf[0]) < 0) {
386 pr_debug("%s: can't disable alarm\n", rs5c->rtc->name); 409 pr_debug("%s: can't disable alarm\n", rs5c->rtc->name);
387 return -EIO; 410 return -EIO;
388 } 411 }
389 rs5c->regs[RS5C_REG_CTRL1] = buf[1]; 412 rs5c->regs[RS5C_REG_CTRL1] = buf[0];
390 } 413 }
391 414
392 /* set alarm */ 415 /* set alarm */
393 buf[0] = RS5C_ADDR(RS5C_REG_ALARM_A_MIN); 416 buf[0] = BIN2BCD(t->time.tm_min);
394 buf[1] = BIN2BCD(t->time.tm_min); 417 buf[1] = rs5c_hr2reg(rs5c, t->time.tm_hour);
395 buf[2] = rs5c_hr2reg(rs5c, t->time.tm_hour); 418 buf[2] = 0x7f; /* any/all days */
396 buf[3] = 0x7f; /* any/all days */ 419
397 if ((i2c_master_send(client, buf, 4)) != 4) { 420 for (i = 0; i < sizeof(buf); i++) {
398 pr_debug("%s: can't set alarm time\n", rs5c->rtc->name); 421 addr = RS5C_ADDR(RS5C_REG_ALARM_A_MIN + i);
399 return -EIO; 422 if (i2c_smbus_write_byte_data(client, addr, buf[i]) < 0) {
423 pr_debug("%s: can't set alarm time\n", rs5c->rtc->name);
424 return -EIO;
425 }
400 } 426 }
401 427
402 /* ... and maybe enable its irq */ 428 /* ... and maybe enable its irq */
403 if (t->enabled) { 429 if (t->enabled) {
404 buf[0] = RS5C_ADDR(RS5C_REG_CTRL1); 430 addr = RS5C_ADDR(RS5C_REG_CTRL1);
405 buf[1] = rs5c->regs[RS5C_REG_CTRL1] | RS5C_CTRL1_AALE; 431 buf[0] = rs5c->regs[RS5C_REG_CTRL1] | RS5C_CTRL1_AALE;
406 if ((i2c_master_send(client, buf, 2)) != 2) 432 if (i2c_smbus_write_byte_data(client, addr, buf[0]) < 0)
407 printk(KERN_WARNING "%s: can't enable alarm\n", 433 printk(KERN_WARNING "%s: can't enable alarm\n",
408 rs5c->rtc->name); 434 rs5c->rtc->name);
409 rs5c->regs[RS5C_REG_CTRL1] = buf[1]; 435 rs5c->regs[RS5C_REG_CTRL1] = buf[0];
410 } 436 }
411 437
412 return 0; 438 return 0;
@@ -503,18 +529,81 @@ static void rs5c_sysfs_unregister(struct device *dev)
503 529
504static struct i2c_driver rs5c372_driver; 530static struct i2c_driver rs5c372_driver;
505 531
532static int rs5c_oscillator_setup(struct rs5c372 *rs5c372)
533{
534 unsigned char buf[2];
535 int addr, i, ret = 0;
536
537 if (rs5c372->type == rtc_r2025sd) {
538 if (!(rs5c372->regs[RS5C_REG_CTRL2] & R2025_CTRL2_XST))
539 return ret;
540 rs5c372->regs[RS5C_REG_CTRL2] &= ~R2025_CTRL2_XST;
541 } else {
542 if (!(rs5c372->regs[RS5C_REG_CTRL2] & RS5C_CTRL2_XSTP))
543 return ret;
544 rs5c372->regs[RS5C_REG_CTRL2] &= ~RS5C_CTRL2_XSTP;
545 }
546
547 addr = RS5C_ADDR(RS5C_REG_CTRL1);
548 buf[0] = rs5c372->regs[RS5C_REG_CTRL1];
549 buf[1] = rs5c372->regs[RS5C_REG_CTRL2];
550
551 /* use 24hr mode */
552 switch (rs5c372->type) {
553 case rtc_rs5c372a:
554 case rtc_rs5c372b:
555 buf[1] |= RS5C372_CTRL2_24;
556 rs5c372->time24 = 1;
557 break;
558 case rtc_r2025sd:
559 case rtc_rv5c386:
560 case rtc_rv5c387a:
561 buf[0] |= RV5C387_CTRL1_24;
562 rs5c372->time24 = 1;
563 break;
564 default:
565 /* impossible */
566 break;
567 }
568
569 for (i = 0; i < sizeof(buf); i++) {
570 addr = RS5C_ADDR(RS5C_REG_CTRL1 + i);
571 ret = i2c_smbus_write_byte_data(rs5c372->client, addr, buf[i]);
572 if (unlikely(ret < 0))
573 return ret;
574 }
575
576 rs5c372->regs[RS5C_REG_CTRL1] = buf[0];
577 rs5c372->regs[RS5C_REG_CTRL2] = buf[1];
578
579 return 0;
580}
581
506static int rs5c372_probe(struct i2c_client *client, 582static int rs5c372_probe(struct i2c_client *client,
507 const struct i2c_device_id *id) 583 const struct i2c_device_id *id)
508{ 584{
509 int err = 0; 585 int err = 0;
586 int smbus_mode = 0;
510 struct rs5c372 *rs5c372; 587 struct rs5c372 *rs5c372;
511 struct rtc_time tm; 588 struct rtc_time tm;
512 589
513 dev_dbg(&client->dev, "%s\n", __func__); 590 dev_dbg(&client->dev, "%s\n", __func__);
514 591
515 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 592 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C |
516 err = -ENODEV; 593 I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_I2C_BLOCK)) {
517 goto exit; 594 /*
595 * If we don't have any master mode adapter, try breaking
596 * it down in to the barest of capabilities.
597 */
598 if (i2c_check_functionality(client->adapter,
599 I2C_FUNC_SMBUS_BYTE_DATA |
600 I2C_FUNC_SMBUS_I2C_BLOCK))
601 smbus_mode = 1;
602 else {
603 /* Still no good, give up */
604 err = -ENODEV;
605 goto exit;
606 }
518 } 607 }
519 608
520 if (!(rs5c372 = kzalloc(sizeof(struct rs5c372), GFP_KERNEL))) { 609 if (!(rs5c372 = kzalloc(sizeof(struct rs5c372), GFP_KERNEL))) {
@@ -528,6 +617,7 @@ static int rs5c372_probe(struct i2c_client *client,
528 617
529 /* we read registers 0x0f then 0x00-0x0f; skip the first one */ 618 /* we read registers 0x0f then 0x00-0x0f; skip the first one */
530 rs5c372->regs = &rs5c372->buf[1]; 619 rs5c372->regs = &rs5c372->buf[1];
620 rs5c372->smbus = smbus_mode;
531 621
532 err = rs5c_get_regs(rs5c372); 622 err = rs5c_get_regs(rs5c372);
533 if (err < 0) 623 if (err < 0)
@@ -543,6 +633,7 @@ static int rs5c372_probe(struct i2c_client *client,
543 if (rs5c372->regs[RS5C_REG_CTRL2] & RS5C372_CTRL2_24) 633 if (rs5c372->regs[RS5C_REG_CTRL2] & RS5C372_CTRL2_24)
544 rs5c372->time24 = 1; 634 rs5c372->time24 = 1;
545 break; 635 break;
636 case rtc_r2025sd:
546 case rtc_rv5c386: 637 case rtc_rv5c386:
547 case rtc_rv5c387a: 638 case rtc_rv5c387a:
548 if (rs5c372->regs[RS5C_REG_CTRL1] & RV5C387_CTRL1_24) 639 if (rs5c372->regs[RS5C_REG_CTRL1] & RV5C387_CTRL1_24)
@@ -558,39 +649,14 @@ static int rs5c372_probe(struct i2c_client *client,
558 649
559 /* if the oscillator lost power and no other software (like 650 /* if the oscillator lost power and no other software (like
560 * the bootloader) set it up, do it here. 651 * the bootloader) set it up, do it here.
652 *
653 * The R2025S/D does this a little differently than the other
654 * parts, so we special case that..
561 */ 655 */
562 if (rs5c372->regs[RS5C_REG_CTRL2] & RS5C_CTRL2_XSTP) { 656 err = rs5c_oscillator_setup(rs5c372);
563 unsigned char buf[3]; 657 if (unlikely(err < 0)) {
564 658 dev_err(&client->dev, "setup error\n");
565 rs5c372->regs[RS5C_REG_CTRL2] &= ~RS5C_CTRL2_XSTP; 659 goto exit_kfree;
566
567 buf[0] = RS5C_ADDR(RS5C_REG_CTRL1);
568 buf[1] = rs5c372->regs[RS5C_REG_CTRL1];
569 buf[2] = rs5c372->regs[RS5C_REG_CTRL2];
570
571 /* use 24hr mode */
572 switch (rs5c372->type) {
573 case rtc_rs5c372a:
574 case rtc_rs5c372b:
575 buf[2] |= RS5C372_CTRL2_24;
576 rs5c372->time24 = 1;
577 break;
578 case rtc_rv5c386:
579 case rtc_rv5c387a:
580 buf[1] |= RV5C387_CTRL1_24;
581 rs5c372->time24 = 1;
582 break;
583 default:
584 /* impossible */
585 break;
586 }
587
588 if ((i2c_master_send(client, buf, 3)) != 3) {
589 dev_err(&client->dev, "setup error\n");
590 goto exit_kfree;
591 }
592 rs5c372->regs[RS5C_REG_CTRL1] = buf[1];
593 rs5c372->regs[RS5C_REG_CTRL2] = buf[2];
594 } 660 }
595 661
596 if (rs5c372_get_datetime(client, &tm) < 0) 662 if (rs5c372_get_datetime(client, &tm) < 0)
@@ -598,6 +664,7 @@ static int rs5c372_probe(struct i2c_client *client,
598 664
599 dev_info(&client->dev, "%s found, %s, driver version " DRV_VERSION "\n", 665 dev_info(&client->dev, "%s found, %s, driver version " DRV_VERSION "\n",
600 ({ char *s; switch (rs5c372->type) { 666 ({ char *s; switch (rs5c372->type) {
667 case rtc_r2025sd: s = "r2025sd"; break;
601 case rtc_rs5c372a: s = "rs5c372a"; break; 668 case rtc_rs5c372a: s = "rs5c372a"; break;
602 case rtc_rs5c372b: s = "rs5c372b"; break; 669 case rtc_rs5c372b: s = "rs5c372b"; break;
603 case rtc_rv5c386: s = "rv5c386"; break; 670 case rtc_rv5c386: s = "rv5c386"; break;
@@ -667,7 +734,8 @@ module_exit(rs5c372_exit);
667 734
668MODULE_AUTHOR( 735MODULE_AUTHOR(
669 "Pavel Mironchik <pmironchik@optifacio.net>, " 736 "Pavel Mironchik <pmironchik@optifacio.net>, "
670 "Alessandro Zummo <a.zummo@towertech.it>"); 737 "Alessandro Zummo <a.zummo@towertech.it>, "
738 "Paul Mundt <lethal@linux-sh.org>");
671MODULE_DESCRIPTION("Ricoh RS5C372 RTC driver"); 739MODULE_DESCRIPTION("Ricoh RS5C372 RTC driver");
672MODULE_LICENSE("GPL"); 740MODULE_LICENSE("GPL");
673MODULE_VERSION(DRV_VERSION); 741MODULE_VERSION(DRV_VERSION);
diff --git a/drivers/rtc/rtc-sh.c b/drivers/rtc/rtc-sh.c
index 690a7800805a..3f393c82e32c 100644
--- a/drivers/rtc/rtc-sh.c
+++ b/drivers/rtc/rtc-sh.c
@@ -257,12 +257,6 @@ static inline void sh_rtc_setaie(struct device *dev, unsigned int enable)
257 spin_unlock_irq(&rtc->lock); 257 spin_unlock_irq(&rtc->lock);
258} 258}
259 259
260static void sh_rtc_release(struct device *dev)
261{
262 sh_rtc_setpie(dev, 0);
263 sh_rtc_setaie(dev, 0);
264}
265
266static int sh_rtc_proc(struct device *dev, struct seq_file *seq) 260static int sh_rtc_proc(struct device *dev, struct seq_file *seq)
267{ 261{
268 struct sh_rtc *rtc = dev_get_drvdata(dev); 262 struct sh_rtc *rtc = dev_get_drvdata(dev);
@@ -559,7 +553,6 @@ static int sh_rtc_irq_set_freq(struct device *dev, int freq)
559} 553}
560 554
561static struct rtc_class_ops sh_rtc_ops = { 555static struct rtc_class_ops sh_rtc_ops = {
562 .release = sh_rtc_release,
563 .ioctl = sh_rtc_ioctl, 556 .ioctl = sh_rtc_ioctl,
564 .read_time = sh_rtc_read_time, 557 .read_time = sh_rtc_read_time,
565 .set_time = sh_rtc_set_time, 558 .set_time = sh_rtc_set_time,
diff --git a/drivers/rtc/rtc-starfire.c b/drivers/rtc/rtc-starfire.c
new file mode 100644
index 000000000000..7ccb0dd700af
--- /dev/null
+++ b/drivers/rtc/rtc-starfire.c
@@ -0,0 +1,120 @@
1/* rtc-starfire.c: Starfire platform RTC driver.
2 *
3 * Copyright (C) 2008 David S. Miller <davem@davemloft.net>
4 */
5
6#include <linux/kernel.h>
7#include <linux/module.h>
8#include <linux/init.h>
9#include <linux/time.h>
10#include <linux/rtc.h>
11#include <linux/platform_device.h>
12
13#include <asm/oplib.h>
14
15MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
16MODULE_DESCRIPTION("Starfire RTC driver");
17MODULE_LICENSE("GPL");
18
19struct starfire_rtc {
20 struct rtc_device *rtc;
21 spinlock_t lock;
22};
23
24static u32 starfire_get_time(void)
25{
26 static char obp_gettod[32];
27 static u32 unix_tod;
28
29 sprintf(obp_gettod, "h# %08x unix-gettod",
30 (unsigned int) (long) &unix_tod);
31 prom_feval(obp_gettod);
32
33 return unix_tod;
34}
35
36static int starfire_read_time(struct device *dev, struct rtc_time *tm)
37{
38 struct starfire_rtc *p = dev_get_drvdata(dev);
39 unsigned long flags, secs;
40
41 spin_lock_irqsave(&p->lock, flags);
42 secs = starfire_get_time();
43 spin_unlock_irqrestore(&p->lock, flags);
44
45 rtc_time_to_tm(secs, tm);
46
47 return 0;
48}
49
50static int starfire_set_time(struct device *dev, struct rtc_time *tm)
51{
52 unsigned long secs;
53 int err;
54
55 err = rtc_tm_to_time(tm, &secs);
56 if (err)
57 return err;
58
59 /* Do nothing, time is set using the service processor
60 * console on this platform.
61 */
62 return 0;
63}
64
65static const struct rtc_class_ops starfire_rtc_ops = {
66 .read_time = starfire_read_time,
67 .set_time = starfire_set_time,
68};
69
70static int __devinit starfire_rtc_probe(struct platform_device *pdev)
71{
72 struct starfire_rtc *p = kzalloc(sizeof(*p), GFP_KERNEL);
73
74 if (!p)
75 return -ENOMEM;
76
77 spin_lock_init(&p->lock);
78
79 p->rtc = rtc_device_register("starfire", &pdev->dev,
80 &starfire_rtc_ops, THIS_MODULE);
81 if (IS_ERR(p->rtc)) {
82 int err = PTR_ERR(p->rtc);
83 kfree(p);
84 return err;
85 }
86 platform_set_drvdata(pdev, p);
87 return 0;
88}
89
90static int __devexit starfire_rtc_remove(struct platform_device *pdev)
91{
92 struct starfire_rtc *p = platform_get_drvdata(pdev);
93
94 rtc_device_unregister(p->rtc);
95 kfree(p);
96
97 return 0;
98}
99
100static struct platform_driver starfire_rtc_driver = {
101 .driver = {
102 .name = "rtc-starfire",
103 .owner = THIS_MODULE,
104 },
105 .probe = starfire_rtc_probe,
106 .remove = __devexit_p(starfire_rtc_remove),
107};
108
109static int __init starfire_rtc_init(void)
110{
111 return platform_driver_register(&starfire_rtc_driver);
112}
113
114static void __exit starfire_rtc_exit(void)
115{
116 platform_driver_unregister(&starfire_rtc_driver);
117}
118
119module_init(starfire_rtc_init);
120module_exit(starfire_rtc_exit);
diff --git a/drivers/rtc/rtc-stk17ta8.c b/drivers/rtc/rtc-stk17ta8.c
index 31d3c8c28588..9a7e920315fa 100644
--- a/drivers/rtc/rtc-stk17ta8.c
+++ b/drivers/rtc/rtc-stk17ta8.c
@@ -215,17 +215,6 @@ static irqreturn_t stk17ta8_rtc_interrupt(int irq, void *dev_id)
215 return IRQ_HANDLED; 215 return IRQ_HANDLED;
216} 216}
217 217
218static void stk17ta8_rtc_release(struct device *dev)
219{
220 struct platform_device *pdev = to_platform_device(dev);
221 struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
222
223 if (pdata->irq >= 0) {
224 pdata->irqen = 0;
225 stk17ta8_rtc_update_alarm(pdata);
226 }
227}
228
229static int stk17ta8_rtc_ioctl(struct device *dev, unsigned int cmd, 218static int stk17ta8_rtc_ioctl(struct device *dev, unsigned int cmd,
230 unsigned long arg) 219 unsigned long arg)
231{ 220{
@@ -254,7 +243,6 @@ static const struct rtc_class_ops stk17ta8_rtc_ops = {
254 .set_time = stk17ta8_rtc_set_time, 243 .set_time = stk17ta8_rtc_set_time,
255 .read_alarm = stk17ta8_rtc_read_alarm, 244 .read_alarm = stk17ta8_rtc_read_alarm,
256 .set_alarm = stk17ta8_rtc_set_alarm, 245 .set_alarm = stk17ta8_rtc_set_alarm,
257 .release = stk17ta8_rtc_release,
258 .ioctl = stk17ta8_rtc_ioctl, 246 .ioctl = stk17ta8_rtc_ioctl,
259}; 247};
260 248
diff --git a/drivers/rtc/rtc-sun4v.c b/drivers/rtc/rtc-sun4v.c
new file mode 100644
index 000000000000..2012ccbb4a53
--- /dev/null
+++ b/drivers/rtc/rtc-sun4v.c
@@ -0,0 +1,153 @@
1/* rtc-sun4c.c: Hypervisor based RTC for SUN4V systems.
2 *
3 * Copyright (C) 2008 David S. Miller <davem@davemloft.net>
4 */
5
6#include <linux/kernel.h>
7#include <linux/module.h>
8#include <linux/delay.h>
9#include <linux/init.h>
10#include <linux/time.h>
11#include <linux/rtc.h>
12#include <linux/platform_device.h>
13
14#include <asm/hypervisor.h>
15
16MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
17MODULE_DESCRIPTION("SUN4V RTC driver");
18MODULE_LICENSE("GPL");
19
20struct sun4v_rtc {
21 struct rtc_device *rtc;
22 spinlock_t lock;
23};
24
25static unsigned long hypervisor_get_time(void)
26{
27 unsigned long ret, time;
28 int retries = 10000;
29
30retry:
31 ret = sun4v_tod_get(&time);
32 if (ret == HV_EOK)
33 return time;
34 if (ret == HV_EWOULDBLOCK) {
35 if (--retries > 0) {
36 udelay(100);
37 goto retry;
38 }
39 printk(KERN_WARNING "SUN4V: tod_get() timed out.\n");
40 return 0;
41 }
42 printk(KERN_WARNING "SUN4V: tod_get() not supported.\n");
43 return 0;
44}
45
46static int sun4v_read_time(struct device *dev, struct rtc_time *tm)
47{
48 struct sun4v_rtc *p = dev_get_drvdata(dev);
49 unsigned long flags, secs;
50
51 spin_lock_irqsave(&p->lock, flags);
52 secs = hypervisor_get_time();
53 spin_unlock_irqrestore(&p->lock, flags);
54
55 rtc_time_to_tm(secs, tm);
56
57 return 0;
58}
59
60static int hypervisor_set_time(unsigned long secs)
61{
62 unsigned long ret;
63 int retries = 10000;
64
65retry:
66 ret = sun4v_tod_set(secs);
67 if (ret == HV_EOK)
68 return 0;
69 if (ret == HV_EWOULDBLOCK) {
70 if (--retries > 0) {
71 udelay(100);
72 goto retry;
73 }
74 printk(KERN_WARNING "SUN4V: tod_set() timed out.\n");
75 return -EAGAIN;
76 }
77 printk(KERN_WARNING "SUN4V: tod_set() not supported.\n");
78 return -EOPNOTSUPP;
79}
80
81static int sun4v_set_time(struct device *dev, struct rtc_time *tm)
82{
83 struct sun4v_rtc *p = dev_get_drvdata(dev);
84 unsigned long flags, secs;
85 int err;
86
87 err = rtc_tm_to_time(tm, &secs);
88 if (err)
89 return err;
90
91 spin_lock_irqsave(&p->lock, flags);
92 err = hypervisor_set_time(secs);
93 spin_unlock_irqrestore(&p->lock, flags);
94
95 return err;
96}
97
98static const struct rtc_class_ops sun4v_rtc_ops = {
99 .read_time = sun4v_read_time,
100 .set_time = sun4v_set_time,
101};
102
103static int __devinit sun4v_rtc_probe(struct platform_device *pdev)
104{
105 struct sun4v_rtc *p = kzalloc(sizeof(*p), GFP_KERNEL);
106
107 if (!p)
108 return -ENOMEM;
109
110 spin_lock_init(&p->lock);
111
112 p->rtc = rtc_device_register("sun4v", &pdev->dev,
113 &sun4v_rtc_ops, THIS_MODULE);
114 if (IS_ERR(p->rtc)) {
115 int err = PTR_ERR(p->rtc);
116 kfree(p);
117 return err;
118 }
119 platform_set_drvdata(pdev, p);
120 return 0;
121}
122
123static int __devexit sun4v_rtc_remove(struct platform_device *pdev)
124{
125 struct sun4v_rtc *p = platform_get_drvdata(pdev);
126
127 rtc_device_unregister(p->rtc);
128 kfree(p);
129
130 return 0;
131}
132
133static struct platform_driver sun4v_rtc_driver = {
134 .driver = {
135 .name = "rtc-sun4v",
136 .owner = THIS_MODULE,
137 },
138 .probe = sun4v_rtc_probe,
139 .remove = __devexit_p(sun4v_rtc_remove),
140};
141
142static int __init sun4v_rtc_init(void)
143{
144 return platform_driver_register(&sun4v_rtc_driver);
145}
146
147static void __exit sun4v_rtc_exit(void)
148{
149 platform_driver_unregister(&sun4v_rtc_driver);
150}
151
152module_init(sun4v_rtc_init);
153module_exit(sun4v_rtc_exit);
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-27 10:57:29 -0500