aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/rtc
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2014-06-06 19:35:10 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2014-06-06 19:35:10 -0400
commit57d326169e878a1a37b2bccd1cf81f6809ee67b9 (patch)
tree86ed74ae4dc2beaebce1c67b8459f1873b777d3a /drivers/rtc
parent7b215de3d0abbc4f6daf2efd19e8809af0564490 (diff)
parent0244756edc4b98c129e92c7061d9f383708cf786 (diff)
Merge branch 'akpm' (patches from Andrew Morton) into next
Merge more updates from Andrew Morton: - Most of the rest of MM. This includes "mark remap_file_pages syscall as deprecated" but the actual "replace remap_file_pages syscall with emulation" is held back. I guess we'll need to work out when to pull the trigger on that one. - various minor cleanups to obscure filesystems - the drivers/rtc queue - hfsplus updates - ufs, hpfs, fatfs, affs, reiserfs - Documentation/ - signals - procfs - cpu hotplug - lib/idr.c - rapidio - sysctl - ipc updates * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (171 commits) ufs: sb mutex merge + mutex_destroy powerpc: update comments for generic idle conversion cris: update comments for generic idle conversion idle: remove cpu_idle() forward declarations nbd: zero from and len fields in NBD_CMD_DISCONNECT. mm: convert some level-less printks to pr_* MAINTAINERS: adi-buildroot-devel is moderated MAINTAINERS: add linux-api for review of API/ABI changes mm/kmemleak-test.c: use pr_fmt for logging fs/dlm/debug_fs.c: replace seq_printf by seq_puts fs/dlm/lockspace.c: convert simple_str to kstr fs/dlm/config.c: convert simple_str to kstr mm: mark remap_file_pages() syscall as deprecated mm: memcontrol: remove unnecessary memcg argument from soft limit functions mm: memcontrol: clean up memcg zoneinfo lookup mm/memblock.c: call kmemleak directly from memblock_(alloc|free) mm/mempool.c: update the kmemleak stack trace for mempool allocations lib/radix-tree.c: update the kmemleak stack trace for radix tree allocations mm: introduce kmemleak_update_trace() mm/kmemleak.c: use %u to print ->checksum ...
Diffstat (limited to 'drivers/rtc')
-rw-r--r--drivers/rtc/Kconfig42
-rw-r--r--drivers/rtc/Makefile4
-rw-r--r--drivers/rtc/interface.c14
-rw-r--r--drivers/rtc/rtc-88pm860x.c3
-rw-r--r--drivers/rtc/rtc-at91rm9200.c16
-rw-r--r--drivers/rtc/rtc-bfin.c16
-rw-r--r--drivers/rtc/rtc-cmos.c85
-rw-r--r--drivers/rtc/rtc-da9052.c122
-rw-r--r--drivers/rtc/rtc-da9063.c333
-rw-r--r--drivers/rtc/rtc-ds1343.c689
-rw-r--r--drivers/rtc/rtc-ds1742.c2
-rw-r--r--drivers/rtc/rtc-efi.c2
-rw-r--r--drivers/rtc/rtc-hym8563.c5
-rw-r--r--drivers/rtc/rtc-isl12057.c2
-rw-r--r--drivers/rtc/rtc-m41t80.c104
-rw-r--r--drivers/rtc/rtc-mcp795.c199
-rw-r--r--drivers/rtc/rtc-mv.c2
-rw-r--r--drivers/rtc/rtc-omap.c138
-rw-r--r--drivers/rtc/rtc-palmas.c2
-rw-r--r--drivers/rtc/rtc-pxa.c2
-rw-r--r--drivers/rtc/rtc-sa1100.c2
-rw-r--r--drivers/rtc/rtc-xgene.c278
22 files changed, 1838 insertions, 224 deletions
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 2e565f8e5165..71988b69eca6 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -386,12 +386,12 @@ config RTC_DRV_PCF8583
386 will be called rtc-pcf8583. 386 will be called rtc-pcf8583.
387 387
388config RTC_DRV_M41T80 388config RTC_DRV_M41T80
389 tristate "ST M41T62/65/M41T80/81/82/83/84/85/87" 389 tristate "ST M41T62/65/M41T80/81/82/83/84/85/87 and compatible"
390 help 390 help
391 If you say Y here you will get support for the ST M41T60 391 If you say Y here you will get support for the ST M41T60
392 and M41T80 RTC chips series. Currently, the following chips are 392 and M41T80 RTC chips series. Currently, the following chips are
393 supported: M41T62, M41T65, M41T80, M41T81, M41T82, M41T83, M41ST84, 393 supported: M41T62, M41T65, M41T80, M41T81, M41T82, M41T83, M41ST84,
394 M41ST85, and M41ST87. 394 M41ST85, M41ST87, and MicroCrystal RV4162.
395 395
396 This driver can also be built as a module. If so, the module 396 This driver can also be built as a module. If so, the module
397 will be called rtc-m41t80. 397 will be called rtc-m41t80.
@@ -573,6 +573,17 @@ config RTC_DRV_DS1305
573 This driver can also be built as a module. If so, the module 573 This driver can also be built as a module. If so, the module
574 will be called rtc-ds1305. 574 will be called rtc-ds1305.
575 575
576config RTC_DRV_DS1343
577 select REGMAP_SPI
578 tristate "Dallas/Maxim DS1343/DS1344"
579 help
580 If you say yes here you get support for the
581 Dallas/Maxim DS1343 and DS1344 real time clock chips.
582 Support for trickle charger, alarm is provided.
583
584 This driver can also be built as a module. If so, the module
585 will be called rtc-ds1343.
586
576config RTC_DRV_DS1347 587config RTC_DRV_DS1347
577 tristate "Dallas/Maxim DS1347" 588 tristate "Dallas/Maxim DS1347"
578 help 589 help
@@ -650,6 +661,14 @@ config RTC_DRV_RX4581
650 This driver can also be built as a module. If so the module 661 This driver can also be built as a module. If so the module
651 will be called rtc-rx4581. 662 will be called rtc-rx4581.
652 663
664config RTC_DRV_MCP795
665 tristate "Microchip MCP795"
666 help
667 If you say yes here you will get support for the Microchip MCP795.
668
669 This driver can also be built as a module. If so the module
670 will be called rtc-mcp795.
671
653endif # SPI_MASTER 672endif # SPI_MASTER
654 673
655comment "Platform RTC drivers" 674comment "Platform RTC drivers"
@@ -758,6 +777,16 @@ config RTC_DRV_DA9055
758 This driver can also be built as a module. If so, the module 777 This driver can also be built as a module. If so, the module
759 will be called rtc-da9055 778 will be called rtc-da9055
760 779
780config RTC_DRV_DA9063
781 tristate "Dialog Semiconductor DA9063 RTC"
782 depends on MFD_DA9063
783 help
784 If you say yes here you will get support for the RTC subsystem
785 of the Dialog Semiconductor DA9063.
786
787 This driver can also be built as a module. If so, the module
788 will be called "rtc-da9063".
789
761config RTC_DRV_EFI 790config RTC_DRV_EFI
762 tristate "EFI RTC" 791 tristate "EFI RTC"
763 depends on IA64 792 depends on IA64
@@ -1327,6 +1356,15 @@ config RTC_DRV_MOXART
1327 This driver can also be built as a module. If so, the module 1356 This driver can also be built as a module. If so, the module
1328 will be called rtc-moxart 1357 will be called rtc-moxart
1329 1358
1359config RTC_DRV_XGENE
1360 tristate "APM X-Gene RTC"
1361 help
1362 If you say yes here you get support for the APM X-Gene SoC real time
1363 clock.
1364
1365 This driver can also be built as a module, if so, the module
1366 will be called "rtc-xgene".
1367
1330comment "HID Sensor RTC drivers" 1368comment "HID Sensor RTC drivers"
1331 1369
1332config RTC_DRV_HID_SENSOR_TIME 1370config RTC_DRV_HID_SENSOR_TIME
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index 40a09915c8f6..70347d041d10 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -32,6 +32,7 @@ obj-$(CONFIG_RTC_DRV_CMOS) += rtc-cmos.o
32obj-$(CONFIG_RTC_DRV_COH901331) += rtc-coh901331.o 32obj-$(CONFIG_RTC_DRV_COH901331) += rtc-coh901331.o
33obj-$(CONFIG_RTC_DRV_DA9052) += rtc-da9052.o 33obj-$(CONFIG_RTC_DRV_DA9052) += rtc-da9052.o
34obj-$(CONFIG_RTC_DRV_DA9055) += rtc-da9055.o 34obj-$(CONFIG_RTC_DRV_DA9055) += rtc-da9055.o
35obj-$(CONFIG_RTC_DRV_DA9063) += rtc-da9063.o
35obj-$(CONFIG_RTC_DRV_DAVINCI) += rtc-davinci.o 36obj-$(CONFIG_RTC_DRV_DAVINCI) += rtc-davinci.o
36obj-$(CONFIG_RTC_DRV_DM355EVM) += rtc-dm355evm.o 37obj-$(CONFIG_RTC_DRV_DM355EVM) += rtc-dm355evm.o
37obj-$(CONFIG_RTC_DRV_VRTC) += rtc-mrst.o 38obj-$(CONFIG_RTC_DRV_VRTC) += rtc-mrst.o
@@ -40,6 +41,7 @@ obj-$(CONFIG_RTC_DRV_DS1286) += rtc-ds1286.o
40obj-$(CONFIG_RTC_DRV_DS1302) += rtc-ds1302.o 41obj-$(CONFIG_RTC_DRV_DS1302) += rtc-ds1302.o
41obj-$(CONFIG_RTC_DRV_DS1305) += rtc-ds1305.o 42obj-$(CONFIG_RTC_DRV_DS1305) += rtc-ds1305.o
42obj-$(CONFIG_RTC_DRV_DS1307) += rtc-ds1307.o 43obj-$(CONFIG_RTC_DRV_DS1307) += rtc-ds1307.o
44obj-$(CONFIG_RTC_DRV_DS1343) += rtc-ds1343.o
43obj-$(CONFIG_RTC_DRV_DS1347) += rtc-ds1347.o 45obj-$(CONFIG_RTC_DRV_DS1347) += rtc-ds1347.o
44obj-$(CONFIG_RTC_DRV_DS1374) += rtc-ds1374.o 46obj-$(CONFIG_RTC_DRV_DS1374) += rtc-ds1374.o
45obj-$(CONFIG_RTC_DRV_DS1390) += rtc-ds1390.o 47obj-$(CONFIG_RTC_DRV_DS1390) += rtc-ds1390.o
@@ -80,6 +82,7 @@ obj-$(CONFIG_RTC_DRV_MAX8997) += rtc-max8997.o
80obj-$(CONFIG_RTC_DRV_MAX6902) += rtc-max6902.o 82obj-$(CONFIG_RTC_DRV_MAX6902) += rtc-max6902.o
81obj-$(CONFIG_RTC_DRV_MAX77686) += rtc-max77686.o 83obj-$(CONFIG_RTC_DRV_MAX77686) += rtc-max77686.o
82obj-$(CONFIG_RTC_DRV_MC13XXX) += rtc-mc13xxx.o 84obj-$(CONFIG_RTC_DRV_MC13XXX) += rtc-mc13xxx.o
85obj-$(CONFIG_RTC_DRV_MCP795) += rtc-mcp795.o
83obj-$(CONFIG_RTC_DRV_MSM6242) += rtc-msm6242.o 86obj-$(CONFIG_RTC_DRV_MSM6242) += rtc-msm6242.o
84obj-$(CONFIG_RTC_DRV_MPC5121) += rtc-mpc5121.o 87obj-$(CONFIG_RTC_DRV_MPC5121) += rtc-mpc5121.o
85obj-$(CONFIG_RTC_DRV_MV) += rtc-mv.o 88obj-$(CONFIG_RTC_DRV_MV) += rtc-mv.o
@@ -135,5 +138,6 @@ obj-$(CONFIG_RTC_DRV_VT8500) += rtc-vt8500.o
135obj-$(CONFIG_RTC_DRV_WM831X) += rtc-wm831x.o 138obj-$(CONFIG_RTC_DRV_WM831X) += rtc-wm831x.o
136obj-$(CONFIG_RTC_DRV_WM8350) += rtc-wm8350.o 139obj-$(CONFIG_RTC_DRV_WM8350) += rtc-wm8350.o
137obj-$(CONFIG_RTC_DRV_X1205) += rtc-x1205.o 140obj-$(CONFIG_RTC_DRV_X1205) += rtc-x1205.o
141obj-$(CONFIG_RTC_DRV_XGENE) += rtc-xgene.o
138obj-$(CONFIG_RTC_DRV_SIRFSOC) += rtc-sirfsoc.o 142obj-$(CONFIG_RTC_DRV_SIRFSOC) += rtc-sirfsoc.o
139obj-$(CONFIG_RTC_DRV_MOXART) += rtc-moxart.o 143obj-$(CONFIG_RTC_DRV_MOXART) += rtc-moxart.o
diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c
index c2eff6082363..5813fa52c3d4 100644
--- a/drivers/rtc/interface.c
+++ b/drivers/rtc/interface.c
@@ -292,7 +292,8 @@ int __rtc_read_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm)
292 dev_dbg(&rtc->dev, "alarm rollover: %s\n", "year"); 292 dev_dbg(&rtc->dev, "alarm rollover: %s\n", "year");
293 do { 293 do {
294 alarm->time.tm_year++; 294 alarm->time.tm_year++;
295 } while (rtc_valid_tm(&alarm->time) != 0); 295 } while (!is_leap_year(alarm->time.tm_year + 1900)
296 && rtc_valid_tm(&alarm->time) != 0);
296 break; 297 break;
297 298
298 default: 299 default:
@@ -300,7 +301,16 @@ int __rtc_read_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm)
300 } 301 }
301 302
302done: 303done:
303 return 0; 304 err = rtc_valid_tm(&alarm->time);
305
306 if (err) {
307 dev_warn(&rtc->dev, "invalid alarm value: %d-%d-%d %d:%d:%d\n",
308 alarm->time.tm_year + 1900, alarm->time.tm_mon + 1,
309 alarm->time.tm_mday, alarm->time.tm_hour, alarm->time.tm_min,
310 alarm->time.tm_sec);
311 }
312
313 return err;
304} 314}
305 315
306int rtc_read_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm) 316int rtc_read_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm)
diff --git a/drivers/rtc/rtc-88pm860x.c b/drivers/rtc/rtc-88pm860x.c
index 816504846cdd..0c6add1a38dc 100644
--- a/drivers/rtc/rtc-88pm860x.c
+++ b/drivers/rtc/rtc-88pm860x.c
@@ -293,7 +293,7 @@ static int pm860x_rtc_dt_init(struct platform_device *pdev,
293 int ret; 293 int ret;
294 if (!np) 294 if (!np)
295 return -ENODEV; 295 return -ENODEV;
296 np = of_find_node_by_name(np, "rtc"); 296 np = of_get_child_by_name(np, "rtc");
297 if (!np) { 297 if (!np) {
298 dev_err(&pdev->dev, "failed to find rtc node\n"); 298 dev_err(&pdev->dev, "failed to find rtc node\n");
299 return -ENODEV; 299 return -ENODEV;
@@ -301,6 +301,7 @@ static int pm860x_rtc_dt_init(struct platform_device *pdev,
301 ret = of_property_read_u32(np, "marvell,88pm860x-vrtc", &info->vrtc); 301 ret = of_property_read_u32(np, "marvell,88pm860x-vrtc", &info->vrtc);
302 if (ret) 302 if (ret)
303 info->vrtc = 0; 303 info->vrtc = 0;
304 of_node_put(np);
304 return 0; 305 return 0;
305} 306}
306#else 307#else
diff --git a/drivers/rtc/rtc-at91rm9200.c b/drivers/rtc/rtc-at91rm9200.c
index 3281c90691c3..44fe83ee9bee 100644
--- a/drivers/rtc/rtc-at91rm9200.c
+++ b/drivers/rtc/rtc-at91rm9200.c
@@ -48,6 +48,7 @@ struct at91_rtc_config {
48 48
49static const struct at91_rtc_config *at91_rtc_config; 49static const struct at91_rtc_config *at91_rtc_config;
50static DECLARE_COMPLETION(at91_rtc_updated); 50static DECLARE_COMPLETION(at91_rtc_updated);
51static DECLARE_COMPLETION(at91_rtc_upd_rdy);
51static unsigned int at91_alarm_year = AT91_RTC_EPOCH; 52static unsigned int at91_alarm_year = AT91_RTC_EPOCH;
52static void __iomem *at91_rtc_regs; 53static void __iomem *at91_rtc_regs;
53static int irq; 54static int irq;
@@ -161,6 +162,8 @@ static int at91_rtc_settime(struct device *dev, struct rtc_time *tm)
161 1900 + tm->tm_year, tm->tm_mon, tm->tm_mday, 162 1900 + tm->tm_year, tm->tm_mon, tm->tm_mday,
162 tm->tm_hour, tm->tm_min, tm->tm_sec); 163 tm->tm_hour, tm->tm_min, tm->tm_sec);
163 164
165 wait_for_completion(&at91_rtc_upd_rdy);
166
164 /* Stop Time/Calendar from counting */ 167 /* Stop Time/Calendar from counting */
165 cr = at91_rtc_read(AT91_RTC_CR); 168 cr = at91_rtc_read(AT91_RTC_CR);
166 at91_rtc_write(AT91_RTC_CR, cr | AT91_RTC_UPDCAL | AT91_RTC_UPDTIM); 169 at91_rtc_write(AT91_RTC_CR, cr | AT91_RTC_UPDCAL | AT91_RTC_UPDTIM);
@@ -183,7 +186,9 @@ static int at91_rtc_settime(struct device *dev, struct rtc_time *tm)
183 186
184 /* Restart Time/Calendar */ 187 /* Restart Time/Calendar */
185 cr = at91_rtc_read(AT91_RTC_CR); 188 cr = at91_rtc_read(AT91_RTC_CR);
189 at91_rtc_write(AT91_RTC_SCCR, AT91_RTC_SECEV);
186 at91_rtc_write(AT91_RTC_CR, cr & ~(AT91_RTC_UPDCAL | AT91_RTC_UPDTIM)); 190 at91_rtc_write(AT91_RTC_CR, cr & ~(AT91_RTC_UPDCAL | AT91_RTC_UPDTIM));
191 at91_rtc_write_ier(AT91_RTC_SECEV);
187 192
188 return 0; 193 return 0;
189} 194}
@@ -290,8 +295,10 @@ static irqreturn_t at91_rtc_interrupt(int irq, void *dev_id)
290 if (rtsr) { /* this interrupt is shared! Is it ours? */ 295 if (rtsr) { /* this interrupt is shared! Is it ours? */
291 if (rtsr & AT91_RTC_ALARM) 296 if (rtsr & AT91_RTC_ALARM)
292 events |= (RTC_AF | RTC_IRQF); 297 events |= (RTC_AF | RTC_IRQF);
293 if (rtsr & AT91_RTC_SECEV) 298 if (rtsr & AT91_RTC_SECEV) {
294 events |= (RTC_UF | RTC_IRQF); 299 complete(&at91_rtc_upd_rdy);
300 at91_rtc_write_idr(AT91_RTC_SECEV);
301 }
295 if (rtsr & AT91_RTC_ACKUPD) 302 if (rtsr & AT91_RTC_ACKUPD)
296 complete(&at91_rtc_updated); 303 complete(&at91_rtc_updated);
297 304
@@ -413,6 +420,11 @@ static int __init at91_rtc_probe(struct platform_device *pdev)
413 return PTR_ERR(rtc); 420 return PTR_ERR(rtc);
414 platform_set_drvdata(pdev, rtc); 421 platform_set_drvdata(pdev, rtc);
415 422
423 /* enable SECEV interrupt in order to initialize at91_rtc_upd_rdy
424 * completion.
425 */
426 at91_rtc_write_ier(AT91_RTC_SECEV);
427
416 dev_info(&pdev->dev, "AT91 Real Time Clock driver.\n"); 428 dev_info(&pdev->dev, "AT91 Real Time Clock driver.\n");
417 return 0; 429 return 0;
418} 430}
diff --git a/drivers/rtc/rtc-bfin.c b/drivers/rtc/rtc-bfin.c
index 0c53f452849d..fe4bdb06a55a 100644
--- a/drivers/rtc/rtc-bfin.c
+++ b/drivers/rtc/rtc-bfin.c
@@ -346,7 +346,7 @@ static int bfin_rtc_probe(struct platform_device *pdev)
346{ 346{
347 struct bfin_rtc *rtc; 347 struct bfin_rtc *rtc;
348 struct device *dev = &pdev->dev; 348 struct device *dev = &pdev->dev;
349 int ret = 0; 349 int ret;
350 unsigned long timeout = jiffies + HZ; 350 unsigned long timeout = jiffies + HZ;
351 351
352 dev_dbg_stamp(dev); 352 dev_dbg_stamp(dev);
@@ -361,16 +361,17 @@ static int bfin_rtc_probe(struct platform_device *pdev)
361 /* Register our RTC with the RTC framework */ 361 /* Register our RTC with the RTC framework */
362 rtc->rtc_dev = devm_rtc_device_register(dev, pdev->name, &bfin_rtc_ops, 362 rtc->rtc_dev = devm_rtc_device_register(dev, pdev->name, &bfin_rtc_ops,
363 THIS_MODULE); 363 THIS_MODULE);
364 if (unlikely(IS_ERR(rtc->rtc_dev))) { 364 if (unlikely(IS_ERR(rtc->rtc_dev)))
365 ret = PTR_ERR(rtc->rtc_dev); 365 return PTR_ERR(rtc->rtc_dev);
366 goto err;
367 }
368 366
369 /* Grab the IRQ and init the hardware */ 367 /* Grab the IRQ and init the hardware */
370 ret = devm_request_irq(dev, IRQ_RTC, bfin_rtc_interrupt, 0, 368 ret = devm_request_irq(dev, IRQ_RTC, bfin_rtc_interrupt, 0,
371 pdev->name, dev); 369 pdev->name, dev);
372 if (unlikely(ret)) 370 if (unlikely(ret))
373 goto err; 371 dev_err(&pdev->dev,
372 "unable to request IRQ; alarm won't work, "
373 "and writes will be delayed\n");
374
374 /* sometimes the bootloader touched things, but the write complete was not 375 /* sometimes the bootloader touched things, but the write complete was not
375 * enabled, so let's just do a quick timeout here since the IRQ will not fire ... 376 * enabled, so let's just do a quick timeout here since the IRQ will not fire ...
376 */ 377 */
@@ -381,9 +382,6 @@ static int bfin_rtc_probe(struct platform_device *pdev)
381 bfin_write_RTC_SWCNT(0); 382 bfin_write_RTC_SWCNT(0);
382 383
383 return 0; 384 return 0;
384
385err:
386 return ret;
387} 385}
388 386
389static int bfin_rtc_remove(struct platform_device *pdev) 387static int bfin_rtc_remove(struct platform_device *pdev)
diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c
index 0963c9309c74..b0e4a3eb33c7 100644
--- a/drivers/rtc/rtc-cmos.c
+++ b/drivers/rtc/rtc-cmos.c
@@ -647,6 +647,7 @@ cmos_do_probe(struct device *dev, struct resource *ports, int rtc_irq)
647 int retval = 0; 647 int retval = 0;
648 unsigned char rtc_control; 648 unsigned char rtc_control;
649 unsigned address_space; 649 unsigned address_space;
650 u32 flags = 0;
650 651
651 /* there can be only one ... */ 652 /* there can be only one ... */
652 if (cmos_rtc.dev) 653 if (cmos_rtc.dev)
@@ -660,9 +661,12 @@ cmos_do_probe(struct device *dev, struct resource *ports, int rtc_irq)
660 * REVISIT non-x86 systems may instead use memory space resources 661 * REVISIT non-x86 systems may instead use memory space resources
661 * (needing ioremap etc), not i/o space resources like this ... 662 * (needing ioremap etc), not i/o space resources like this ...
662 */ 663 */
663 ports = request_region(ports->start, 664 if (RTC_IOMAPPED)
664 resource_size(ports), 665 ports = request_region(ports->start, resource_size(ports),
665 driver_name); 666 driver_name);
667 else
668 ports = request_mem_region(ports->start, resource_size(ports),
669 driver_name);
666 if (!ports) { 670 if (!ports) {
667 dev_dbg(dev, "i/o registers already in use\n"); 671 dev_dbg(dev, "i/o registers already in use\n");
668 return -EBUSY; 672 return -EBUSY;
@@ -699,6 +703,11 @@ cmos_do_probe(struct device *dev, struct resource *ports, int rtc_irq)
699 * expect CMOS_READ and friends to handle. 703 * expect CMOS_READ and friends to handle.
700 */ 704 */
701 if (info) { 705 if (info) {
706 if (info->flags)
707 flags = info->flags;
708 if (info->address_space)
709 address_space = info->address_space;
710
702 if (info->rtc_day_alarm && info->rtc_day_alarm < 128) 711 if (info->rtc_day_alarm && info->rtc_day_alarm < 128)
703 cmos_rtc.day_alrm = info->rtc_day_alarm; 712 cmos_rtc.day_alrm = info->rtc_day_alarm;
704 if (info->rtc_mon_alarm && info->rtc_mon_alarm < 128) 713 if (info->rtc_mon_alarm && info->rtc_mon_alarm < 128)
@@ -726,18 +735,21 @@ cmos_do_probe(struct device *dev, struct resource *ports, int rtc_irq)
726 735
727 spin_lock_irq(&rtc_lock); 736 spin_lock_irq(&rtc_lock);
728 737
729 /* force periodic irq to CMOS reset default of 1024Hz; 738 if (!(flags & CMOS_RTC_FLAGS_NOFREQ)) {
730 * 739 /* force periodic irq to CMOS reset default of 1024Hz;
731 * REVISIT it's been reported that at least one x86_64 ALI mobo 740 *
732 * doesn't use 32KHz here ... for portability we might need to 741 * REVISIT it's been reported that at least one x86_64 ALI
733 * do something about other clock frequencies. 742 * mobo doesn't use 32KHz here ... for portability we might
734 */ 743 * need to do something about other clock frequencies.
735 cmos_rtc.rtc->irq_freq = 1024; 744 */
736 hpet_set_periodic_freq(cmos_rtc.rtc->irq_freq); 745 cmos_rtc.rtc->irq_freq = 1024;
737 CMOS_WRITE(RTC_REF_CLCK_32KHZ | 0x06, RTC_FREQ_SELECT); 746 hpet_set_periodic_freq(cmos_rtc.rtc->irq_freq);
747 CMOS_WRITE(RTC_REF_CLCK_32KHZ | 0x06, RTC_FREQ_SELECT);
748 }
738 749
739 /* disable irqs */ 750 /* disable irqs */
740 cmos_irq_disable(&cmos_rtc, RTC_PIE | RTC_AIE | RTC_UIE); 751 if (is_valid_irq(rtc_irq))
752 cmos_irq_disable(&cmos_rtc, RTC_PIE | RTC_AIE | RTC_UIE);
741 753
742 rtc_control = CMOS_READ(RTC_CONTROL); 754 rtc_control = CMOS_READ(RTC_CONTROL);
743 755
@@ -802,14 +814,18 @@ cleanup1:
802 cmos_rtc.dev = NULL; 814 cmos_rtc.dev = NULL;
803 rtc_device_unregister(cmos_rtc.rtc); 815 rtc_device_unregister(cmos_rtc.rtc);
804cleanup0: 816cleanup0:
805 release_region(ports->start, resource_size(ports)); 817 if (RTC_IOMAPPED)
818 release_region(ports->start, resource_size(ports));
819 else
820 release_mem_region(ports->start, resource_size(ports));
806 return retval; 821 return retval;
807} 822}
808 823
809static void cmos_do_shutdown(void) 824static void cmos_do_shutdown(int rtc_irq)
810{ 825{
811 spin_lock_irq(&rtc_lock); 826 spin_lock_irq(&rtc_lock);
812 cmos_irq_disable(&cmos_rtc, RTC_IRQMASK); 827 if (is_valid_irq(rtc_irq))
828 cmos_irq_disable(&cmos_rtc, RTC_IRQMASK);
813 spin_unlock_irq(&rtc_lock); 829 spin_unlock_irq(&rtc_lock);
814} 830}
815 831
@@ -818,7 +834,7 @@ static void __exit cmos_do_remove(struct device *dev)
818 struct cmos_rtc *cmos = dev_get_drvdata(dev); 834 struct cmos_rtc *cmos = dev_get_drvdata(dev);
819 struct resource *ports; 835 struct resource *ports;
820 836
821 cmos_do_shutdown(); 837 cmos_do_shutdown(cmos->irq);
822 838
823 sysfs_remove_bin_file(&dev->kobj, &nvram); 839 sysfs_remove_bin_file(&dev->kobj, &nvram);
824 840
@@ -831,7 +847,10 @@ static void __exit cmos_do_remove(struct device *dev)
831 cmos->rtc = NULL; 847 cmos->rtc = NULL;
832 848
833 ports = cmos->iomem; 849 ports = cmos->iomem;
834 release_region(ports->start, resource_size(ports)); 850 if (RTC_IOMAPPED)
851 release_region(ports->start, resource_size(ports));
852 else
853 release_mem_region(ports->start, resource_size(ports));
835 cmos->iomem = NULL; 854 cmos->iomem = NULL;
836 855
837 cmos->dev = NULL; 856 cmos->dev = NULL;
@@ -1065,10 +1084,13 @@ static void __exit cmos_pnp_remove(struct pnp_dev *pnp)
1065 1084
1066static void cmos_pnp_shutdown(struct pnp_dev *pnp) 1085static void cmos_pnp_shutdown(struct pnp_dev *pnp)
1067{ 1086{
1068 if (system_state == SYSTEM_POWER_OFF && !cmos_poweroff(&pnp->dev)) 1087 struct device *dev = &pnp->dev;
1088 struct cmos_rtc *cmos = dev_get_drvdata(dev);
1089
1090 if (system_state == SYSTEM_POWER_OFF && !cmos_poweroff(dev))
1069 return; 1091 return;
1070 1092
1071 cmos_do_shutdown(); 1093 cmos_do_shutdown(cmos->irq);
1072} 1094}
1073 1095
1074static const struct pnp_device_id rtc_ids[] = { 1096static const struct pnp_device_id rtc_ids[] = {
@@ -1143,11 +1165,21 @@ static inline void cmos_of_init(struct platform_device *pdev) {}
1143 1165
1144static int __init cmos_platform_probe(struct platform_device *pdev) 1166static int __init cmos_platform_probe(struct platform_device *pdev)
1145{ 1167{
1168 struct resource *resource;
1169 int irq;
1170
1146 cmos_of_init(pdev); 1171 cmos_of_init(pdev);
1147 cmos_wake_setup(&pdev->dev); 1172 cmos_wake_setup(&pdev->dev);
1148 return cmos_do_probe(&pdev->dev, 1173
1149 platform_get_resource(pdev, IORESOURCE_IO, 0), 1174 if (RTC_IOMAPPED)
1150 platform_get_irq(pdev, 0)); 1175 resource = platform_get_resource(pdev, IORESOURCE_IO, 0);
1176 else
1177 resource = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1178 irq = platform_get_irq(pdev, 0);
1179 if (irq < 0)
1180 irq = -1;
1181
1182 return cmos_do_probe(&pdev->dev, resource, irq);
1151} 1183}
1152 1184
1153static int __exit cmos_platform_remove(struct platform_device *pdev) 1185static int __exit cmos_platform_remove(struct platform_device *pdev)
@@ -1158,10 +1190,13 @@ static int __exit cmos_platform_remove(struct platform_device *pdev)
1158 1190
1159static void cmos_platform_shutdown(struct platform_device *pdev) 1191static void cmos_platform_shutdown(struct platform_device *pdev)
1160{ 1192{
1161 if (system_state == SYSTEM_POWER_OFF && !cmos_poweroff(&pdev->dev)) 1193 struct device *dev = &pdev->dev;
1194 struct cmos_rtc *cmos = dev_get_drvdata(dev);
1195
1196 if (system_state == SYSTEM_POWER_OFF && !cmos_poweroff(dev))
1162 return; 1197 return;
1163 1198
1164 cmos_do_shutdown(); 1199 cmos_do_shutdown(cmos->irq);
1165} 1200}
1166 1201
1167/* work with hotplug and coldplug */ 1202/* work with hotplug and coldplug */
diff --git a/drivers/rtc/rtc-da9052.c b/drivers/rtc/rtc-da9052.c
index a1cbf64242a5..e5c9486cf452 100644
--- a/drivers/rtc/rtc-da9052.c
+++ b/drivers/rtc/rtc-da9052.c
@@ -20,28 +20,28 @@
20#include <linux/mfd/da9052/da9052.h> 20#include <linux/mfd/da9052/da9052.h>
21#include <linux/mfd/da9052/reg.h> 21#include <linux/mfd/da9052/reg.h>
22 22
23#define rtc_err(da9052, fmt, ...) \ 23#define rtc_err(rtc, fmt, ...) \
24 dev_err(da9052->dev, "%s: " fmt, __func__, ##__VA_ARGS__) 24 dev_err(rtc->da9052->dev, "%s: " fmt, __func__, ##__VA_ARGS__)
25 25
26struct da9052_rtc { 26struct da9052_rtc {
27 struct rtc_device *rtc; 27 struct rtc_device *rtc;
28 struct da9052 *da9052; 28 struct da9052 *da9052;
29}; 29};
30 30
31static int da9052_rtc_enable_alarm(struct da9052 *da9052, bool enable) 31static int da9052_rtc_enable_alarm(struct da9052_rtc *rtc, bool enable)
32{ 32{
33 int ret; 33 int ret;
34 if (enable) { 34 if (enable) {
35 ret = da9052_reg_update(da9052, DA9052_ALARM_Y_REG, 35 ret = da9052_reg_update(rtc->da9052, DA9052_ALARM_Y_REG,
36 DA9052_ALARM_Y_ALARM_ON, 36 DA9052_ALARM_Y_ALARM_ON|DA9052_ALARM_Y_TICK_ON,
37 DA9052_ALARM_Y_ALARM_ON); 37 DA9052_ALARM_Y_ALARM_ON);
38 if (ret != 0) 38 if (ret != 0)
39 rtc_err(da9052, "Failed to enable ALM: %d\n", ret); 39 rtc_err(rtc, "Failed to enable ALM: %d\n", ret);
40 } else { 40 } else {
41 ret = da9052_reg_update(da9052, DA9052_ALARM_Y_REG, 41 ret = da9052_reg_update(rtc->da9052, DA9052_ALARM_Y_REG,
42 DA9052_ALARM_Y_ALARM_ON, 0); 42 DA9052_ALARM_Y_ALARM_ON|DA9052_ALARM_Y_TICK_ON, 0);
43 if (ret != 0) 43 if (ret != 0)
44 rtc_err(da9052, "Write error: %d\n", ret); 44 rtc_err(rtc, "Write error: %d\n", ret);
45 } 45 }
46 return ret; 46 return ret;
47} 47}
@@ -49,31 +49,20 @@ static int da9052_rtc_enable_alarm(struct da9052 *da9052, bool enable)
49static irqreturn_t da9052_rtc_irq(int irq, void *data) 49static irqreturn_t da9052_rtc_irq(int irq, void *data)
50{ 50{
51 struct da9052_rtc *rtc = data; 51 struct da9052_rtc *rtc = data;
52 int ret;
53 52
54 ret = da9052_reg_read(rtc->da9052, DA9052_ALARM_MI_REG); 53 rtc_update_irq(rtc->rtc, 1, RTC_IRQF | RTC_AF);
55 if (ret < 0) {
56 rtc_err(rtc->da9052, "Read error: %d\n", ret);
57 return IRQ_NONE;
58 }
59
60 if (ret & DA9052_ALARMMI_ALARMTYPE) {
61 da9052_rtc_enable_alarm(rtc->da9052, 0);
62 rtc_update_irq(rtc->rtc, 1, RTC_IRQF | RTC_AF);
63 } else
64 rtc_update_irq(rtc->rtc, 1, RTC_IRQF | RTC_PF);
65 54
66 return IRQ_HANDLED; 55 return IRQ_HANDLED;
67} 56}
68 57
69static int da9052_read_alarm(struct da9052 *da9052, struct rtc_time *rtc_tm) 58static int da9052_read_alarm(struct da9052_rtc *rtc, struct rtc_time *rtc_tm)
70{ 59{
71 int ret; 60 int ret;
72 uint8_t v[5]; 61 uint8_t v[5];
73 62
74 ret = da9052_group_read(da9052, DA9052_ALARM_MI_REG, 5, v); 63 ret = da9052_group_read(rtc->da9052, DA9052_ALARM_MI_REG, 5, v);
75 if (ret != 0) { 64 if (ret != 0) {
76 rtc_err(da9052, "Failed to group read ALM: %d\n", ret); 65 rtc_err(rtc, "Failed to group read ALM: %d\n", ret);
77 return ret; 66 return ret;
78 } 67 }
79 68
@@ -84,23 +73,33 @@ static int da9052_read_alarm(struct da9052 *da9052, struct rtc_time *rtc_tm)
84 rtc_tm->tm_min = v[0] & DA9052_RTC_MIN; 73 rtc_tm->tm_min = v[0] & DA9052_RTC_MIN;
85 74
86 ret = rtc_valid_tm(rtc_tm); 75 ret = rtc_valid_tm(rtc_tm);
87 if (ret != 0)
88 return ret;
89 return ret; 76 return ret;
90} 77}
91 78
92static int da9052_set_alarm(struct da9052 *da9052, struct rtc_time *rtc_tm) 79static int da9052_set_alarm(struct da9052_rtc *rtc, struct rtc_time *rtc_tm)
93{ 80{
81 struct da9052 *da9052 = rtc->da9052;
82 unsigned long alm_time;
94 int ret; 83 int ret;
95 uint8_t v[3]; 84 uint8_t v[3];
96 85
86 ret = rtc_tm_to_time(rtc_tm, &alm_time);
87 if (ret != 0)
88 return ret;
89
90 if (rtc_tm->tm_sec > 0) {
91 alm_time += 60 - rtc_tm->tm_sec;
92 rtc_time_to_tm(alm_time, rtc_tm);
93 }
94 BUG_ON(rtc_tm->tm_sec); /* it will cause repeated irqs if not zero */
95
97 rtc_tm->tm_year -= 100; 96 rtc_tm->tm_year -= 100;
98 rtc_tm->tm_mon += 1; 97 rtc_tm->tm_mon += 1;
99 98
100 ret = da9052_reg_update(da9052, DA9052_ALARM_MI_REG, 99 ret = da9052_reg_update(da9052, DA9052_ALARM_MI_REG,
101 DA9052_RTC_MIN, rtc_tm->tm_min); 100 DA9052_RTC_MIN, rtc_tm->tm_min);
102 if (ret != 0) { 101 if (ret != 0) {
103 rtc_err(da9052, "Failed to write ALRM MIN: %d\n", ret); 102 rtc_err(rtc, "Failed to write ALRM MIN: %d\n", ret);
104 return ret; 103 return ret;
105 } 104 }
106 105
@@ -115,22 +114,22 @@ static int da9052_set_alarm(struct da9052 *da9052, struct rtc_time *rtc_tm)
115 ret = da9052_reg_update(da9052, DA9052_ALARM_Y_REG, 114 ret = da9052_reg_update(da9052, DA9052_ALARM_Y_REG,
116 DA9052_RTC_YEAR, rtc_tm->tm_year); 115 DA9052_RTC_YEAR, rtc_tm->tm_year);
117 if (ret != 0) 116 if (ret != 0)
118 rtc_err(da9052, "Failed to write ALRM YEAR: %d\n", ret); 117 rtc_err(rtc, "Failed to write ALRM YEAR: %d\n", ret);
119 118
120 return ret; 119 return ret;
121} 120}
122 121
123static int da9052_rtc_get_alarm_status(struct da9052 *da9052) 122static int da9052_rtc_get_alarm_status(struct da9052_rtc *rtc)
124{ 123{
125 int ret; 124 int ret;
126 125
127 ret = da9052_reg_read(da9052, DA9052_ALARM_Y_REG); 126 ret = da9052_reg_read(rtc->da9052, DA9052_ALARM_Y_REG);
128 if (ret < 0) { 127 if (ret < 0) {
129 rtc_err(da9052, "Failed to read ALM: %d\n", ret); 128 rtc_err(rtc, "Failed to read ALM: %d\n", ret);
130 return ret; 129 return ret;
131 } 130 }
132 ret &= DA9052_ALARM_Y_ALARM_ON; 131
133 return (ret > 0) ? 1 : 0; 132 return !!(ret&DA9052_ALARM_Y_ALARM_ON);
134} 133}
135 134
136static int da9052_rtc_read_time(struct device *dev, struct rtc_time *rtc_tm) 135static int da9052_rtc_read_time(struct device *dev, struct rtc_time *rtc_tm)
@@ -141,7 +140,7 @@ static int da9052_rtc_read_time(struct device *dev, struct rtc_time *rtc_tm)
141 140
142 ret = da9052_group_read(rtc->da9052, DA9052_COUNT_S_REG, 6, v); 141 ret = da9052_group_read(rtc->da9052, DA9052_COUNT_S_REG, 6, v);
143 if (ret < 0) { 142 if (ret < 0) {
144 rtc_err(rtc->da9052, "Failed to read RTC time : %d\n", ret); 143 rtc_err(rtc, "Failed to read RTC time : %d\n", ret);
145 return ret; 144 return ret;
146 } 145 }
147 146
@@ -153,18 +152,14 @@ static int da9052_rtc_read_time(struct device *dev, struct rtc_time *rtc_tm)
153 rtc_tm->tm_sec = v[0] & DA9052_RTC_SEC; 152 rtc_tm->tm_sec = v[0] & DA9052_RTC_SEC;
154 153
155 ret = rtc_valid_tm(rtc_tm); 154 ret = rtc_valid_tm(rtc_tm);
156 if (ret != 0) { 155 return ret;
157 rtc_err(rtc->da9052, "rtc_valid_tm failed: %d\n", ret);
158 return ret;
159 }
160
161 return 0;
162} 156}
163 157
164static int da9052_rtc_set_time(struct device *dev, struct rtc_time *tm) 158static int da9052_rtc_set_time(struct device *dev, struct rtc_time *tm)
165{ 159{
166 struct da9052_rtc *rtc; 160 struct da9052_rtc *rtc;
167 uint8_t v[6]; 161 uint8_t v[6];
162 int ret;
168 163
169 rtc = dev_get_drvdata(dev); 164 rtc = dev_get_drvdata(dev);
170 165
@@ -175,7 +170,10 @@ static int da9052_rtc_set_time(struct device *dev, struct rtc_time *tm)
175 v[4] = tm->tm_mon + 1; 170 v[4] = tm->tm_mon + 1;
176 v[5] = tm->tm_year - 100; 171 v[5] = tm->tm_year - 100;
177 172
178 return da9052_group_write(rtc->da9052, DA9052_COUNT_S_REG, 6, v); 173 ret = da9052_group_write(rtc->da9052, DA9052_COUNT_S_REG, 6, v);
174 if (ret < 0)
175 rtc_err(rtc, "failed to set RTC time: %d\n", ret);
176 return ret;
179} 177}
180 178
181static int da9052_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) 179static int da9052_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
@@ -184,13 +182,13 @@ static int da9052_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
184 struct rtc_time *tm = &alrm->time; 182 struct rtc_time *tm = &alrm->time;
185 struct da9052_rtc *rtc = dev_get_drvdata(dev); 183 struct da9052_rtc *rtc = dev_get_drvdata(dev);
186 184
187 ret = da9052_read_alarm(rtc->da9052, tm); 185 ret = da9052_read_alarm(rtc, tm);
188 186 if (ret < 0) {
189 if (ret) 187 rtc_err(rtc, "failed to read RTC alarm: %d\n", ret);
190 return ret; 188 return ret;
189 }
191 190
192 alrm->enabled = da9052_rtc_get_alarm_status(rtc->da9052); 191 alrm->enabled = da9052_rtc_get_alarm_status(rtc);
193
194 return 0; 192 return 0;
195} 193}
196 194
@@ -200,16 +198,15 @@ static int da9052_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
200 struct rtc_time *tm = &alrm->time; 198 struct rtc_time *tm = &alrm->time;
201 struct da9052_rtc *rtc = dev_get_drvdata(dev); 199 struct da9052_rtc *rtc = dev_get_drvdata(dev);
202 200
203 ret = da9052_rtc_enable_alarm(rtc->da9052, 0); 201 ret = da9052_rtc_enable_alarm(rtc, 0);
204 if (ret < 0) 202 if (ret < 0)
205 return ret; 203 return ret;
206 204
207 ret = da9052_set_alarm(rtc->da9052, tm); 205 ret = da9052_set_alarm(rtc, tm);
208 if (ret) 206 if (ret < 0)
209 return ret; 207 return ret;
210 208
211 ret = da9052_rtc_enable_alarm(rtc->da9052, 1); 209 ret = da9052_rtc_enable_alarm(rtc, 1);
212
213 return ret; 210 return ret;
214} 211}
215 212
@@ -217,7 +214,7 @@ static int da9052_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
217{ 214{
218 struct da9052_rtc *rtc = dev_get_drvdata(dev); 215 struct da9052_rtc *rtc = dev_get_drvdata(dev);
219 216
220 return da9052_rtc_enable_alarm(rtc->da9052, enabled); 217 return da9052_rtc_enable_alarm(rtc, enabled);
221} 218}
222 219
223static const struct rtc_class_ops da9052_rtc_ops = { 220static const struct rtc_class_ops da9052_rtc_ops = {
@@ -239,10 +236,23 @@ static int da9052_rtc_probe(struct platform_device *pdev)
239 236
240 rtc->da9052 = dev_get_drvdata(pdev->dev.parent); 237 rtc->da9052 = dev_get_drvdata(pdev->dev.parent);
241 platform_set_drvdata(pdev, rtc); 238 platform_set_drvdata(pdev, rtc);
239
240 ret = da9052_reg_write(rtc->da9052, DA9052_BBAT_CONT_REG, 0xFE);
241 if (ret < 0) {
242 rtc_err(rtc,
243 "Failed to setup RTC battery charging: %d\n", ret);
244 return ret;
245 }
246
247 ret = da9052_reg_update(rtc->da9052, DA9052_ALARM_Y_REG,
248 DA9052_ALARM_Y_TICK_ON, 0);
249 if (ret != 0)
250 rtc_err(rtc, "Failed to disable TICKS: %d\n", ret);
251
242 ret = da9052_request_irq(rtc->da9052, DA9052_IRQ_ALARM, "ALM", 252 ret = da9052_request_irq(rtc->da9052, DA9052_IRQ_ALARM, "ALM",
243 da9052_rtc_irq, rtc); 253 da9052_rtc_irq, rtc);
244 if (ret != 0) { 254 if (ret != 0) {
245 rtc_err(rtc->da9052, "irq registration failed: %d\n", ret); 255 rtc_err(rtc, "irq registration failed: %d\n", ret);
246 return ret; 256 return ret;
247 } 257 }
248 258
@@ -261,7 +271,7 @@ static struct platform_driver da9052_rtc_driver = {
261 271
262module_platform_driver(da9052_rtc_driver); 272module_platform_driver(da9052_rtc_driver);
263 273
264MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>"); 274MODULE_AUTHOR("Anthony Olech <Anthony.Olech@diasemi.com>");
265MODULE_DESCRIPTION("RTC driver for Dialog DA9052 PMIC"); 275MODULE_DESCRIPTION("RTC driver for Dialog DA9052 PMIC");
266MODULE_LICENSE("GPL"); 276MODULE_LICENSE("GPL");
267MODULE_ALIAS("platform:da9052-rtc"); 277MODULE_ALIAS("platform:da9052-rtc");
diff --git a/drivers/rtc/rtc-da9063.c b/drivers/rtc/rtc-da9063.c
new file mode 100644
index 000000000000..595393098b09
--- /dev/null
+++ b/drivers/rtc/rtc-da9063.c
@@ -0,0 +1,333 @@
1/* rtc-da9063.c - Real time clock device driver for DA9063
2 * Copyright (C) 2013-14 Dialog Semiconductor Ltd.
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
13 */
14
15#include <linux/kernel.h>
16#include <linux/module.h>
17#include <linux/init.h>
18#include <linux/platform_device.h>
19#include <linux/interrupt.h>
20#include <linux/rtc.h>
21#include <linux/slab.h>
22#include <linux/delay.h>
23#include <linux/regmap.h>
24#include <linux/mfd/da9063/registers.h>
25#include <linux/mfd/da9063/core.h>
26
27#define YEARS_TO_DA9063(year) ((year) - 100)
28#define MONTHS_TO_DA9063(month) ((month) + 1)
29#define YEARS_FROM_DA9063(year) ((year) + 100)
30#define MONTHS_FROM_DA9063(month) ((month) - 1)
31
32#define RTC_DATA_LEN (DA9063_REG_COUNT_Y - DA9063_REG_COUNT_S + 1)
33#define RTC_SEC 0
34#define RTC_MIN 1
35#define RTC_HOUR 2
36#define RTC_DAY 3
37#define RTC_MONTH 4
38#define RTC_YEAR 5
39
40struct da9063_rtc {
41 struct rtc_device *rtc_dev;
42 struct da9063 *hw;
43 struct rtc_time alarm_time;
44 bool rtc_sync;
45};
46
47static void da9063_data_to_tm(u8 *data, struct rtc_time *tm)
48{
49 tm->tm_sec = data[RTC_SEC] & DA9063_COUNT_SEC_MASK;
50 tm->tm_min = data[RTC_MIN] & DA9063_COUNT_MIN_MASK;
51 tm->tm_hour = data[RTC_HOUR] & DA9063_COUNT_HOUR_MASK;
52 tm->tm_mday = data[RTC_DAY] & DA9063_COUNT_DAY_MASK;
53 tm->tm_mon = MONTHS_FROM_DA9063(data[RTC_MONTH] &
54 DA9063_COUNT_MONTH_MASK);
55 tm->tm_year = YEARS_FROM_DA9063(data[RTC_YEAR] &
56 DA9063_COUNT_YEAR_MASK);
57}
58
59static void da9063_tm_to_data(struct rtc_time *tm, u8 *data)
60{
61 data[RTC_SEC] &= ~DA9063_COUNT_SEC_MASK;
62 data[RTC_SEC] |= tm->tm_sec & DA9063_COUNT_SEC_MASK;
63
64 data[RTC_MIN] &= ~DA9063_COUNT_MIN_MASK;
65 data[RTC_MIN] |= tm->tm_min & DA9063_COUNT_MIN_MASK;
66
67 data[RTC_HOUR] &= ~DA9063_COUNT_HOUR_MASK;
68 data[RTC_HOUR] |= tm->tm_hour & DA9063_COUNT_HOUR_MASK;
69
70 data[RTC_DAY] &= ~DA9063_COUNT_DAY_MASK;
71 data[RTC_DAY] |= tm->tm_mday & DA9063_COUNT_DAY_MASK;
72
73 data[RTC_MONTH] &= ~DA9063_COUNT_MONTH_MASK;
74 data[RTC_MONTH] |= MONTHS_TO_DA9063(tm->tm_mon) &
75 DA9063_COUNT_MONTH_MASK;
76
77 data[RTC_YEAR] &= ~DA9063_COUNT_YEAR_MASK;
78 data[RTC_YEAR] |= YEARS_TO_DA9063(tm->tm_year) &
79 DA9063_COUNT_YEAR_MASK;
80}
81
82static int da9063_rtc_stop_alarm(struct device *dev)
83{
84 struct da9063_rtc *rtc = dev_get_drvdata(dev);
85
86 return regmap_update_bits(rtc->hw->regmap, DA9063_REG_ALARM_Y,
87 DA9063_ALARM_ON, 0);
88}
89
90static int da9063_rtc_start_alarm(struct device *dev)
91{
92 struct da9063_rtc *rtc = dev_get_drvdata(dev);
93
94 return regmap_update_bits(rtc->hw->regmap, DA9063_REG_ALARM_Y,
95 DA9063_ALARM_ON, DA9063_ALARM_ON);
96}
97
98static int da9063_rtc_read_time(struct device *dev, struct rtc_time *tm)
99{
100 struct da9063_rtc *rtc = dev_get_drvdata(dev);
101 unsigned long tm_secs;
102 unsigned long al_secs;
103 u8 data[RTC_DATA_LEN];
104 int ret;
105
106 ret = regmap_bulk_read(rtc->hw->regmap, DA9063_REG_COUNT_S,
107 data, RTC_DATA_LEN);
108 if (ret < 0) {
109 dev_err(dev, "Failed to read RTC time data: %d\n", ret);
110 return ret;
111 }
112
113 if (!(data[RTC_SEC] & DA9063_RTC_READ)) {
114 dev_dbg(dev, "RTC not yet ready to be read by the host\n");
115 return -EINVAL;
116 }
117
118 da9063_data_to_tm(data, tm);
119
120 rtc_tm_to_time(tm, &tm_secs);
121 rtc_tm_to_time(&rtc->alarm_time, &al_secs);
122
123 /* handle the rtc synchronisation delay */
124 if (rtc->rtc_sync == true && al_secs - tm_secs == 1)
125 memcpy(tm, &rtc->alarm_time, sizeof(struct rtc_time));
126 else
127 rtc->rtc_sync = false;
128
129 return rtc_valid_tm(tm);
130}
131
132static int da9063_rtc_set_time(struct device *dev, struct rtc_time *tm)
133{
134 struct da9063_rtc *rtc = dev_get_drvdata(dev);
135 u8 data[RTC_DATA_LEN];
136 int ret;
137
138 da9063_tm_to_data(tm, data);
139 ret = regmap_bulk_write(rtc->hw->regmap, DA9063_REG_COUNT_S,
140 data, RTC_DATA_LEN);
141 if (ret < 0)
142 dev_err(dev, "Failed to set RTC time data: %d\n", ret);
143
144 return ret;
145}
146
147static int da9063_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
148{
149 struct da9063_rtc *rtc = dev_get_drvdata(dev);
150 u8 data[RTC_DATA_LEN];
151 int ret;
152 unsigned int val;
153
154 ret = regmap_bulk_read(rtc->hw->regmap, DA9063_REG_ALARM_S,
155 &data[RTC_SEC], RTC_DATA_LEN);
156 if (ret < 0)
157 return ret;
158
159 da9063_data_to_tm(data, &alrm->time);
160
161 alrm->enabled = !!(data[RTC_YEAR] & DA9063_ALARM_ON);
162
163 ret = regmap_read(rtc->hw->regmap, DA9063_REG_EVENT_A, &val);
164 if (ret < 0)
165 return ret;
166
167 if (val & (DA9063_E_ALARM))
168 alrm->pending = 1;
169 else
170 alrm->pending = 0;
171
172 return 0;
173}
174
175static int da9063_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
176{
177 struct da9063_rtc *rtc = dev_get_drvdata(dev);
178 u8 data[RTC_DATA_LEN];
179 int ret;
180
181 da9063_tm_to_data(&alrm->time, data);
182
183 ret = da9063_rtc_stop_alarm(dev);
184 if (ret < 0) {
185 dev_err(dev, "Failed to stop alarm: %d\n", ret);
186 return ret;
187 }
188
189 ret = regmap_bulk_write(rtc->hw->regmap, DA9063_REG_ALARM_S,
190 data, RTC_DATA_LEN);
191 if (ret < 0) {
192 dev_err(dev, "Failed to write alarm: %d\n", ret);
193 return ret;
194 }
195
196 rtc->alarm_time = alrm->time;
197
198 if (alrm->enabled) {
199 ret = da9063_rtc_start_alarm(dev);
200 if (ret < 0) {
201 dev_err(dev, "Failed to start alarm: %d\n", ret);
202 return ret;
203 }
204 }
205
206 return ret;
207}
208
209static int da9063_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
210{
211 if (enabled)
212 return da9063_rtc_start_alarm(dev);
213 else
214 return da9063_rtc_stop_alarm(dev);
215}
216
217static irqreturn_t da9063_alarm_event(int irq, void *data)
218{
219 struct da9063_rtc *rtc = data;
220
221 regmap_update_bits(rtc->hw->regmap, DA9063_REG_ALARM_Y,
222 DA9063_ALARM_ON, 0);
223
224 rtc->rtc_sync = true;
225 rtc_update_irq(rtc->rtc_dev, 1, RTC_IRQF | RTC_AF);
226
227 return IRQ_HANDLED;
228}
229
230static const struct rtc_class_ops da9063_rtc_ops = {
231 .read_time = da9063_rtc_read_time,
232 .set_time = da9063_rtc_set_time,
233 .read_alarm = da9063_rtc_read_alarm,
234 .set_alarm = da9063_rtc_set_alarm,
235 .alarm_irq_enable = da9063_rtc_alarm_irq_enable,
236};
237
238static int da9063_rtc_probe(struct platform_device *pdev)
239{
240 struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
241 struct da9063_rtc *rtc;
242 int irq_alarm;
243 u8 data[RTC_DATA_LEN];
244 int ret;
245
246 ret = regmap_update_bits(da9063->regmap, DA9063_REG_CONTROL_E,
247 DA9063_RTC_EN, DA9063_RTC_EN);
248 if (ret < 0) {
249 dev_err(&pdev->dev, "Failed to enable RTC\n");
250 goto err;
251 }
252
253 ret = regmap_update_bits(da9063->regmap, DA9063_REG_EN_32K,
254 DA9063_CRYSTAL, DA9063_CRYSTAL);
255 if (ret < 0) {
256 dev_err(&pdev->dev, "Failed to run 32kHz oscillator\n");
257 goto err;
258 }
259
260 ret = regmap_update_bits(da9063->regmap, DA9063_REG_ALARM_S,
261 DA9063_ALARM_STATUS_TICK | DA9063_ALARM_STATUS_ALARM,
262 0);
263 if (ret < 0) {
264 dev_err(&pdev->dev, "Failed to access RTC alarm register\n");
265 goto err;
266 }
267
268 ret = regmap_update_bits(da9063->regmap, DA9063_REG_ALARM_S,
269 DA9063_ALARM_STATUS_ALARM,
270 DA9063_ALARM_STATUS_ALARM);
271 if (ret < 0) {
272 dev_err(&pdev->dev, "Failed to access RTC alarm register\n");
273 goto err;
274 }
275
276 ret = regmap_update_bits(da9063->regmap, DA9063_REG_ALARM_Y,
277 DA9063_TICK_ON, 0);
278 if (ret < 0) {
279 dev_err(&pdev->dev, "Failed to disable TICKs\n");
280 goto err;
281 }
282
283 ret = regmap_bulk_read(da9063->regmap, DA9063_REG_ALARM_S,
284 data, RTC_DATA_LEN);
285 if (ret < 0) {
286 dev_err(&pdev->dev, "Failed to read initial alarm data: %d\n",
287 ret);
288 goto err;
289 }
290
291 rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL);
292 if (!rtc)
293 return -ENOMEM;
294
295 platform_set_drvdata(pdev, rtc);
296
297 irq_alarm = platform_get_irq_byname(pdev, "ALARM");
298 ret = devm_request_threaded_irq(&pdev->dev, irq_alarm, NULL,
299 da9063_alarm_event,
300 IRQF_TRIGGER_LOW | IRQF_ONESHOT,
301 "ALARM", rtc);
302 if (ret) {
303 dev_err(&pdev->dev, "Failed to request ALARM IRQ %d: %d\n",
304 irq_alarm, ret);
305 goto err;
306 }
307
308 rtc->hw = da9063;
309 rtc->rtc_dev = devm_rtc_device_register(&pdev->dev, DA9063_DRVNAME_RTC,
310 &da9063_rtc_ops, THIS_MODULE);
311 if (IS_ERR(rtc->rtc_dev))
312 return PTR_ERR(rtc->rtc_dev);
313
314 da9063_data_to_tm(data, &rtc->alarm_time);
315 rtc->rtc_sync = false;
316err:
317 return ret;
318}
319
320static struct platform_driver da9063_rtc_driver = {
321 .probe = da9063_rtc_probe,
322 .driver = {
323 .name = DA9063_DRVNAME_RTC,
324 .owner = THIS_MODULE,
325 },
326};
327
328module_platform_driver(da9063_rtc_driver);
329
330MODULE_AUTHOR("S Twiss <stwiss.opensource@diasemi.com>");
331MODULE_DESCRIPTION("Real time clock device driver for Dialog DA9063");
332MODULE_LICENSE("GPL v2");
333MODULE_ALIAS("platform:" DA9063_DRVNAME_RTC);
diff --git a/drivers/rtc/rtc-ds1343.c b/drivers/rtc/rtc-ds1343.c
new file mode 100644
index 000000000000..c3719189dd96
--- /dev/null
+++ b/drivers/rtc/rtc-ds1343.c
@@ -0,0 +1,689 @@
1/* rtc-ds1343.c
2 *
3 * Driver for Dallas Semiconductor DS1343 Low Current, SPI Compatible
4 * Real Time Clock
5 *
6 * Author : Raghavendra Chandra Ganiga <ravi23ganiga@gmail.com>
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 */
13
14#include <linux/init.h>
15#include <linux/module.h>
16#include <linux/interrupt.h>
17#include <linux/device.h>
18#include <linux/spi/spi.h>
19#include <linux/regmap.h>
20#include <linux/rtc.h>
21#include <linux/bcd.h>
22#include <linux/pm.h>
23#include <linux/slab.h>
24
25#define DS1343_DRV_VERSION "01.00"
26#define DALLAS_MAXIM_DS1343 0
27#define DALLAS_MAXIM_DS1344 1
28
29/* RTC DS1343 Registers */
30#define DS1343_SECONDS_REG 0x00
31#define DS1343_MINUTES_REG 0x01
32#define DS1343_HOURS_REG 0x02
33#define DS1343_DAY_REG 0x03
34#define DS1343_DATE_REG 0x04
35#define DS1343_MONTH_REG 0x05
36#define DS1343_YEAR_REG 0x06
37#define DS1343_ALM0_SEC_REG 0x07
38#define DS1343_ALM0_MIN_REG 0x08
39#define DS1343_ALM0_HOUR_REG 0x09
40#define DS1343_ALM0_DAY_REG 0x0A
41#define DS1343_ALM1_SEC_REG 0x0B
42#define DS1343_ALM1_MIN_REG 0x0C
43#define DS1343_ALM1_HOUR_REG 0x0D
44#define DS1343_ALM1_DAY_REG 0x0E
45#define DS1343_CONTROL_REG 0x0F
46#define DS1343_STATUS_REG 0x10
47#define DS1343_TRICKLE_REG 0x11
48
49/* DS1343 Control Registers bits */
50#define DS1343_EOSC 0x80
51#define DS1343_DOSF 0x20
52#define DS1343_EGFIL 0x10
53#define DS1343_SQW 0x08
54#define DS1343_INTCN 0x04
55#define DS1343_A1IE 0x02
56#define DS1343_A0IE 0x01
57
58/* DS1343 Status Registers bits */
59#define DS1343_OSF 0x80
60#define DS1343_IRQF1 0x02
61#define DS1343_IRQF0 0x01
62
63/* DS1343 Trickle Charger Registers bits */
64#define DS1343_TRICKLE_MAGIC 0xa0
65#define DS1343_TRICKLE_DS1 0x08
66#define DS1343_TRICKLE_1K 0x01
67#define DS1343_TRICKLE_2K 0x02
68#define DS1343_TRICKLE_4K 0x03
69
70static const struct spi_device_id ds1343_id[] = {
71 { "ds1343", DALLAS_MAXIM_DS1343 },
72 { "ds1344", DALLAS_MAXIM_DS1344 },
73 { }
74};
75MODULE_DEVICE_TABLE(spi, ds1343_id);
76
77struct ds1343_priv {
78 struct spi_device *spi;
79 struct rtc_device *rtc;
80 struct regmap *map;
81 struct mutex mutex;
82 unsigned int irqen;
83 int irq;
84 int alarm_sec;
85 int alarm_min;
86 int alarm_hour;
87 int alarm_mday;
88};
89
90static int ds1343_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
91{
92 switch (cmd) {
93#ifdef RTC_SET_CHARGE
94 case RTC_SET_CHARGE:
95 {
96 int val;
97
98 if (copy_from_user(&val, (int __user *)arg, sizeof(int)))
99 return -EFAULT;
100
101 return regmap_write(priv->map, DS1343_TRICKLE_REG, val);
102 }
103 break;
104#endif
105 }
106
107 return -ENOIOCTLCMD;
108}
109
110static ssize_t ds1343_show_glitchfilter(struct device *dev,
111 struct device_attribute *attr, char *buf)
112{
113 struct ds1343_priv *priv = dev_get_drvdata(dev);
114 int glitch_filt_status, data;
115
116 regmap_read(priv->map, DS1343_CONTROL_REG, &data);
117
118 glitch_filt_status = !!(data & DS1343_EGFIL);
119
120 if (glitch_filt_status)
121 return sprintf(buf, "enabled\n");
122 else
123 return sprintf(buf, "disabled\n");
124}
125
126static ssize_t ds1343_store_glitchfilter(struct device *dev,
127 struct device_attribute *attr,
128 const char *buf, size_t count)
129{
130 struct ds1343_priv *priv = dev_get_drvdata(dev);
131 int data;
132
133 regmap_read(priv->map, DS1343_CONTROL_REG, &data);
134
135 if (strncmp(buf, "enabled", 7) == 0)
136 data |= DS1343_EGFIL;
137
138 else if (strncmp(buf, "disabled", 8) == 0)
139 data &= ~(DS1343_EGFIL);
140
141 else
142 return -EINVAL;
143
144 regmap_write(priv->map, DS1343_CONTROL_REG, data);
145
146 return count;
147}
148
149static DEVICE_ATTR(glitch_filter, S_IRUGO | S_IWUSR, ds1343_show_glitchfilter,
150 ds1343_store_glitchfilter);
151
152static ssize_t ds1343_show_alarmstatus(struct device *dev,
153 struct device_attribute *attr, char *buf)
154{
155 struct ds1343_priv *priv = dev_get_drvdata(dev);
156 int alarmstatus, data;
157
158 regmap_read(priv->map, DS1343_CONTROL_REG, &data);
159
160 alarmstatus = !!(data & DS1343_A0IE);
161
162 if (alarmstatus)
163 return sprintf(buf, "enabled\n");
164 else
165 return sprintf(buf, "disabled\n");
166}
167
168static DEVICE_ATTR(alarm_status, S_IRUGO, ds1343_show_alarmstatus, NULL);
169
170static ssize_t ds1343_show_alarmmode(struct device *dev,
171 struct device_attribute *attr, char *buf)
172{
173 struct ds1343_priv *priv = dev_get_drvdata(dev);
174 int alarm_mode, data;
175 char *alarm_str;
176
177 regmap_read(priv->map, DS1343_ALM0_SEC_REG, &data);
178 alarm_mode = (data & 0x80) >> 4;
179
180 regmap_read(priv->map, DS1343_ALM0_MIN_REG, &data);
181 alarm_mode |= (data & 0x80) >> 5;
182
183 regmap_read(priv->map, DS1343_ALM0_HOUR_REG, &data);
184 alarm_mode |= (data & 0x80) >> 6;
185
186 regmap_read(priv->map, DS1343_ALM0_DAY_REG, &data);
187 alarm_mode |= (data & 0x80) >> 7;
188
189 switch (alarm_mode) {
190 case 15:
191 alarm_str = "each second";
192 break;
193
194 case 7:
195 alarm_str = "seconds match";
196 break;
197
198 case 3:
199 alarm_str = "minutes and seconds match";
200 break;
201
202 case 1:
203 alarm_str = "hours, minutes and seconds match";
204 break;
205
206 case 0:
207 alarm_str = "day, hours, minutes and seconds match";
208 break;
209
210 default:
211 alarm_str = "invalid";
212 break;
213 }
214
215 return sprintf(buf, "%s\n", alarm_str);
216}
217
218static DEVICE_ATTR(alarm_mode, S_IRUGO, ds1343_show_alarmmode, NULL);
219
220static ssize_t ds1343_show_tricklecharger(struct device *dev,
221 struct device_attribute *attr, char *buf)
222{
223 struct ds1343_priv *priv = dev_get_drvdata(dev);
224 int data;
225 char *diodes = "disabled", *resistors = " ";
226
227 regmap_read(priv->map, DS1343_TRICKLE_REG, &data);
228
229 if ((data & 0xf0) == DS1343_TRICKLE_MAGIC) {
230 switch (data & 0x0c) {
231 case DS1343_TRICKLE_DS1:
232 diodes = "one diode,";
233 break;
234
235 default:
236 diodes = "no diode,";
237 break;
238 }
239
240 switch (data & 0x03) {
241 case DS1343_TRICKLE_1K:
242 resistors = "1k Ohm";
243 break;
244
245 case DS1343_TRICKLE_2K:
246 resistors = "2k Ohm";
247 break;
248
249 case DS1343_TRICKLE_4K:
250 resistors = "4k Ohm";
251 break;
252
253 default:
254 diodes = "disabled";
255 break;
256 }
257 }
258
259 return sprintf(buf, "%s %s\n", diodes, resistors);
260}
261
262static DEVICE_ATTR(trickle_charger, S_IRUGO, ds1343_show_tricklecharger, NULL);
263
264static int ds1343_sysfs_register(struct device *dev)
265{
266 struct ds1343_priv *priv = dev_get_drvdata(dev);
267 int err;
268
269 err = device_create_file(dev, &dev_attr_glitch_filter);
270 if (err)
271 return err;
272
273 err = device_create_file(dev, &dev_attr_trickle_charger);
274 if (err)
275 goto error1;
276
277 if (priv->irq <= 0)
278 return err;
279
280 err = device_create_file(dev, &dev_attr_alarm_mode);
281 if (err)
282 goto error2;
283
284 err = device_create_file(dev, &dev_attr_alarm_status);
285 if (!err)
286 return err;
287
288 device_remove_file(dev, &dev_attr_alarm_mode);
289
290error2:
291 device_remove_file(dev, &dev_attr_trickle_charger);
292
293error1:
294 device_remove_file(dev, &dev_attr_glitch_filter);
295
296 return err;
297}
298
299static void ds1343_sysfs_unregister(struct device *dev)
300{
301 struct ds1343_priv *priv = dev_get_drvdata(dev);
302
303 device_remove_file(dev, &dev_attr_glitch_filter);
304 device_remove_file(dev, &dev_attr_trickle_charger);
305
306 if (priv->irq <= 0)
307 return;
308
309 device_remove_file(dev, &dev_attr_alarm_status);
310 device_remove_file(dev, &dev_attr_alarm_mode);
311}
312
313static int ds1343_read_time(struct device *dev, struct rtc_time *dt)
314{
315 struct ds1343_priv *priv = dev_get_drvdata(dev);
316 unsigned char buf[7];
317 int res;
318
319 res = regmap_bulk_read(priv->map, DS1343_SECONDS_REG, buf, 7);
320 if (res)
321 return res;
322
323 dt->tm_sec = bcd2bin(buf[0]);
324 dt->tm_min = bcd2bin(buf[1]);
325 dt->tm_hour = bcd2bin(buf[2] & 0x3F);
326 dt->tm_wday = bcd2bin(buf[3]) - 1;
327 dt->tm_mday = bcd2bin(buf[4]);
328 dt->tm_mon = bcd2bin(buf[5] & 0x1F) - 1;
329 dt->tm_year = bcd2bin(buf[6]) + 100; /* year offset from 1900 */
330
331 return rtc_valid_tm(dt);
332}
333
334static int ds1343_set_time(struct device *dev, struct rtc_time *dt)
335{
336 struct ds1343_priv *priv = dev_get_drvdata(dev);
337 int res;
338
339 res = regmap_write(priv->map, DS1343_SECONDS_REG,
340 bin2bcd(dt->tm_sec));
341 if (res)
342 return res;
343
344 res = regmap_write(priv->map, DS1343_MINUTES_REG,
345 bin2bcd(dt->tm_min));
346 if (res)
347 return res;
348
349 res = regmap_write(priv->map, DS1343_HOURS_REG,
350 bin2bcd(dt->tm_hour) & 0x3F);
351 if (res)
352 return res;
353
354 res = regmap_write(priv->map, DS1343_DAY_REG,
355 bin2bcd(dt->tm_wday + 1));
356 if (res)
357 return res;
358
359 res = regmap_write(priv->map, DS1343_DATE_REG,
360 bin2bcd(dt->tm_mday));
361 if (res)
362 return res;
363
364 res = regmap_write(priv->map, DS1343_MONTH_REG,
365 bin2bcd(dt->tm_mon + 1));
366 if (res)
367 return res;
368
369 dt->tm_year %= 100;
370
371 res = regmap_write(priv->map, DS1343_YEAR_REG,
372 bin2bcd(dt->tm_year));
373 if (res)
374 return res;
375
376 return 0;
377}
378
379static int ds1343_update_alarm(struct device *dev)
380{
381 struct ds1343_priv *priv = dev_get_drvdata(dev);
382 unsigned int control, stat;
383 unsigned char buf[4];
384 int res = 0;
385
386 res = regmap_read(priv->map, DS1343_CONTROL_REG, &control);
387 if (res)
388 return res;
389
390 res = regmap_read(priv->map, DS1343_STATUS_REG, &stat);
391 if (res)
392 return res;
393
394 control &= ~(DS1343_A0IE);
395 stat &= ~(DS1343_IRQF0);
396
397 res = regmap_write(priv->map, DS1343_CONTROL_REG, control);
398 if (res)
399 return res;
400
401 res = regmap_write(priv->map, DS1343_STATUS_REG, stat);
402 if (res)
403 return res;
404
405 buf[0] = priv->alarm_sec < 0 || (priv->irqen & RTC_UF) ?
406 0x80 : bin2bcd(priv->alarm_sec) & 0x7F;
407 buf[1] = priv->alarm_min < 0 || (priv->irqen & RTC_UF) ?
408 0x80 : bin2bcd(priv->alarm_min) & 0x7F;
409 buf[2] = priv->alarm_hour < 0 || (priv->irqen & RTC_UF) ?
410 0x80 : bin2bcd(priv->alarm_hour) & 0x3F;
411 buf[3] = priv->alarm_mday < 0 || (priv->irqen & RTC_UF) ?
412 0x80 : bin2bcd(priv->alarm_mday) & 0x7F;
413
414 res = regmap_bulk_write(priv->map, DS1343_ALM0_SEC_REG, buf, 4);
415 if (res)
416 return res;
417
418 if (priv->irqen) {
419 control |= DS1343_A0IE;
420 res = regmap_write(priv->map, DS1343_CONTROL_REG, control);
421 }
422
423 return res;
424}
425
426static int ds1343_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
427{
428 struct ds1343_priv *priv = dev_get_drvdata(dev);
429 int res = 0;
430 unsigned int stat;
431
432 if (priv->irq <= 0)
433 return -EINVAL;
434
435 mutex_lock(&priv->mutex);
436
437 res = regmap_read(priv->map, DS1343_STATUS_REG, &stat);
438 if (res)
439 goto out;
440
441 alarm->enabled = !!(priv->irqen & RTC_AF);
442 alarm->pending = !!(stat & DS1343_IRQF0);
443
444 alarm->time.tm_sec = priv->alarm_sec < 0 ? 0 : priv->alarm_sec;
445 alarm->time.tm_min = priv->alarm_min < 0 ? 0 : priv->alarm_min;
446 alarm->time.tm_hour = priv->alarm_hour < 0 ? 0 : priv->alarm_hour;
447 alarm->time.tm_mday = priv->alarm_mday < 0 ? 0 : priv->alarm_mday;
448
449 alarm->time.tm_mon = -1;
450 alarm->time.tm_year = -1;
451 alarm->time.tm_wday = -1;
452 alarm->time.tm_yday = -1;
453 alarm->time.tm_isdst = -1;
454
455out:
456 mutex_unlock(&priv->mutex);
457 return res;
458}
459
460static int ds1343_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
461{
462 struct ds1343_priv *priv = dev_get_drvdata(dev);
463 int res = 0;
464
465 if (priv->irq <= 0)
466 return -EINVAL;
467
468 mutex_lock(&priv->mutex);
469
470 priv->alarm_sec = alarm->time.tm_sec;
471 priv->alarm_min = alarm->time.tm_min;
472 priv->alarm_hour = alarm->time.tm_hour;
473 priv->alarm_mday = alarm->time.tm_mday;
474
475 if (alarm->enabled)
476 priv->irqen |= RTC_AF;
477
478 res = ds1343_update_alarm(dev);
479
480 mutex_unlock(&priv->mutex);
481
482 return res;
483}
484
485static int ds1343_alarm_irq_enable(struct device *dev, unsigned int enabled)
486{
487 struct ds1343_priv *priv = dev_get_drvdata(dev);
488 int res = 0;
489
490 if (priv->irq <= 0)
491 return -EINVAL;
492
493 mutex_lock(&priv->mutex);
494
495 if (enabled)
496 priv->irqen |= RTC_AF;
497 else
498 priv->irqen &= ~RTC_AF;
499
500 res = ds1343_update_alarm(dev);
501
502 mutex_unlock(&priv->mutex);
503
504 return res;
505}
506
507static irqreturn_t ds1343_thread(int irq, void *dev_id)
508{
509 struct ds1343_priv *priv = dev_id;
510 unsigned int stat, control;
511 int res = 0;
512
513 mutex_lock(&priv->mutex);
514
515 res = regmap_read(priv->map, DS1343_STATUS_REG, &stat);
516 if (res)
517 goto out;
518
519 if (stat & DS1343_IRQF0) {
520 stat &= ~DS1343_IRQF0;
521 regmap_write(priv->map, DS1343_STATUS_REG, stat);
522
523 res = regmap_read(priv->map, DS1343_CONTROL_REG, &control);
524 if (res)
525 goto out;
526
527 control &= ~DS1343_A0IE;
528 regmap_write(priv->map, DS1343_CONTROL_REG, control);
529
530 rtc_update_irq(priv->rtc, 1, RTC_AF | RTC_IRQF);
531 }
532
533out:
534 mutex_unlock(&priv->mutex);
535 return IRQ_HANDLED;
536}
537
538static const struct rtc_class_ops ds1343_rtc_ops = {
539 .ioctl = ds1343_ioctl,
540 .read_time = ds1343_read_time,
541 .set_time = ds1343_set_time,
542 .read_alarm = ds1343_read_alarm,
543 .set_alarm = ds1343_set_alarm,
544 .alarm_irq_enable = ds1343_alarm_irq_enable,
545};
546
547static int ds1343_probe(struct spi_device *spi)
548{
549 struct ds1343_priv *priv;
550 struct regmap_config config;
551 unsigned int data;
552 int res;
553
554 memset(&config, 0, sizeof(config));
555 config.reg_bits = 8;
556 config.val_bits = 8;
557 config.write_flag_mask = 0x80;
558
559 priv = devm_kzalloc(&spi->dev, sizeof(struct ds1343_priv), GFP_KERNEL);
560 if (!priv)
561 return -ENOMEM;
562
563 priv->spi = spi;
564 mutex_init(&priv->mutex);
565
566 /* RTC DS1347 works in spi mode 3 and
567 * its chip select is active high
568 */
569 spi->mode = SPI_MODE_3 | SPI_CS_HIGH;
570 spi->bits_per_word = 8;
571 res = spi_setup(spi);
572 if (res)
573 return res;
574
575 spi_set_drvdata(spi, priv);
576
577 priv->map = devm_regmap_init_spi(spi, &config);
578
579 if (IS_ERR(priv->map)) {
580 dev_err(&spi->dev, "spi regmap init failed for rtc ds1343\n");
581 return PTR_ERR(priv->map);
582 }
583
584 res = regmap_read(priv->map, DS1343_SECONDS_REG, &data);
585 if (res)
586 return res;
587
588 regmap_read(priv->map, DS1343_CONTROL_REG, &data);
589 data |= DS1343_INTCN;
590 data &= ~(DS1343_EOSC | DS1343_A1IE | DS1343_A0IE);
591 regmap_write(priv->map, DS1343_CONTROL_REG, data);
592
593 regmap_read(priv->map, DS1343_STATUS_REG, &data);
594 data &= ~(DS1343_OSF | DS1343_IRQF1 | DS1343_IRQF0);
595 regmap_write(priv->map, DS1343_STATUS_REG, data);
596
597 priv->rtc = devm_rtc_device_register(&spi->dev, "ds1343",
598 &ds1343_rtc_ops, THIS_MODULE);
599 if (IS_ERR(priv->rtc)) {
600 dev_err(&spi->dev, "unable to register rtc ds1343\n");
601 return PTR_ERR(priv->rtc);
602 }
603
604 priv->irq = spi->irq;
605
606 if (priv->irq >= 0) {
607 res = devm_request_threaded_irq(&spi->dev, spi->irq, NULL,
608 ds1343_thread,
609 IRQF_NO_SUSPEND | IRQF_ONESHOT,
610 "ds1343", priv);
611 if (res) {
612 priv->irq = -1;
613 dev_err(&spi->dev,
614 "unable to request irq for rtc ds1343\n");
615 } else {
616 device_set_wakeup_capable(&spi->dev, 1);
617 }
618 }
619
620 res = ds1343_sysfs_register(&spi->dev);
621 if (res)
622 dev_err(&spi->dev,
623 "unable to create sysfs entries for rtc ds1343\n");
624
625 return 0;
626}
627
628static int ds1343_remove(struct spi_device *spi)
629{
630 struct ds1343_priv *priv = spi_get_drvdata(spi);
631
632 if (spi->irq) {
633 mutex_lock(&priv->mutex);
634 priv->irqen &= ~RTC_AF;
635 mutex_unlock(&priv->mutex);
636
637 devm_free_irq(&spi->dev, spi->irq, priv);
638 }
639
640 spi_set_drvdata(spi, NULL);
641
642 ds1343_sysfs_unregister(&spi->dev);
643
644 return 0;
645}
646
647#ifdef CONFIG_PM_SLEEP
648
649static int ds1343_suspend(struct device *dev)
650{
651 struct spi_device *spi = to_spi_device(dev);
652
653 if (spi->irq >= 0 && device_may_wakeup(dev))
654 enable_irq_wake(spi->irq);
655
656 return 0;
657}
658
659static int ds1343_resume(struct device *dev)
660{
661 struct spi_device *spi = to_spi_device(dev);
662
663 if (spi->irq >= 0 && device_may_wakeup(dev))
664 disable_irq_wake(spi->irq);
665
666 return 0;
667}
668
669#endif
670
671static SIMPLE_DEV_PM_OPS(ds1343_pm, ds1343_suspend, ds1343_resume);
672
673static struct spi_driver ds1343_driver = {
674 .driver = {
675 .name = "ds1343",
676 .owner = THIS_MODULE,
677 .pm = &ds1343_pm,
678 },
679 .probe = ds1343_probe,
680 .remove = ds1343_remove,
681 .id_table = ds1343_id,
682};
683
684module_spi_driver(ds1343_driver);
685
686MODULE_DESCRIPTION("DS1343 RTC SPI Driver");
687MODULE_AUTHOR("Raghavendra Chandra Ganiga <ravi23ganiga@gmail.com>");
688MODULE_LICENSE("GPL v2");
689MODULE_VERSION(DS1343_DRV_VERSION);
diff --git a/drivers/rtc/rtc-ds1742.c b/drivers/rtc/rtc-ds1742.c
index 942103dac30f..c6b2191a4128 100644
--- a/drivers/rtc/rtc-ds1742.c
+++ b/drivers/rtc/rtc-ds1742.c
@@ -219,7 +219,7 @@ static int ds1742_rtc_remove(struct platform_device *pdev)
219 return 0; 219 return 0;
220} 220}
221 221
222static struct of_device_id __maybe_unused ds1742_rtc_of_match[] = { 222static const struct of_device_id __maybe_unused ds1742_rtc_of_match[] = {
223 { .compatible = "maxim,ds1742", }, 223 { .compatible = "maxim,ds1742", },
224 { } 224 { }
225}; 225};
diff --git a/drivers/rtc/rtc-efi.c b/drivers/rtc/rtc-efi.c
index 797aa0252ba9..c4c38431012e 100644
--- a/drivers/rtc/rtc-efi.c
+++ b/drivers/rtc/rtc-efi.c
@@ -35,7 +35,7 @@ static inline int
35compute_yday(efi_time_t *eft) 35compute_yday(efi_time_t *eft)
36{ 36{
37 /* efi_time_t.month is in the [1-12] so, we need -1 */ 37 /* efi_time_t.month is in the [1-12] so, we need -1 */
38 return rtc_year_days(eft->day - 1, eft->month - 1, eft->year); 38 return rtc_year_days(eft->day, eft->month - 1, eft->year);
39} 39}
40/* 40/*
41 * returns day of the week [0-6] 0=Sunday 41 * returns day of the week [0-6] 0=Sunday
diff --git a/drivers/rtc/rtc-hym8563.c b/drivers/rtc/rtc-hym8563.c
index e5f13c4310fe..b936bb4096b5 100644
--- a/drivers/rtc/rtc-hym8563.c
+++ b/drivers/rtc/rtc-hym8563.c
@@ -418,6 +418,9 @@ static struct clk *hym8563_clkout_register_clk(struct hym8563 *hym8563)
418 init.num_parents = 0; 418 init.num_parents = 0;
419 hym8563->clkout_hw.init = &init; 419 hym8563->clkout_hw.init = &init;
420 420
421 /* optional override of the clockname */
422 of_property_read_string(node, "clock-output-names", &init.name);
423
421 /* register the clock */ 424 /* register the clock */
422 clk = clk_register(&client->dev, &hym8563->clkout_hw); 425 clk = clk_register(&client->dev, &hym8563->clkout_hw);
423 426
@@ -585,7 +588,7 @@ static const struct i2c_device_id hym8563_id[] = {
585}; 588};
586MODULE_DEVICE_TABLE(i2c, hym8563_id); 589MODULE_DEVICE_TABLE(i2c, hym8563_id);
587 590
588static struct of_device_id hym8563_dt_idtable[] = { 591static const struct of_device_id hym8563_dt_idtable[] = {
589 { .compatible = "haoyu,hym8563" }, 592 { .compatible = "haoyu,hym8563" },
590 {}, 593 {},
591}; 594};
diff --git a/drivers/rtc/rtc-isl12057.c b/drivers/rtc/rtc-isl12057.c
index 41bd76aaff76..455b601d731d 100644
--- a/drivers/rtc/rtc-isl12057.c
+++ b/drivers/rtc/rtc-isl12057.c
@@ -278,7 +278,7 @@ static int isl12057_probe(struct i2c_client *client,
278} 278}
279 279
280#ifdef CONFIG_OF 280#ifdef CONFIG_OF
281static struct of_device_id isl12057_dt_match[] = { 281static const struct of_device_id isl12057_dt_match[] = {
282 { .compatible = "isl,isl12057" }, 282 { .compatible = "isl,isl12057" },
283 { }, 283 { },
284}; 284};
diff --git a/drivers/rtc/rtc-m41t80.c b/drivers/rtc/rtc-m41t80.c
index a5248aa1abf1..7ff7427c2e6a 100644
--- a/drivers/rtc/rtc-m41t80.c
+++ b/drivers/rtc/rtc-m41t80.c
@@ -66,8 +66,6 @@
66#define M41T80_FEATURE_WD (1 << 3) /* Extra watchdog resolution */ 66#define M41T80_FEATURE_WD (1 << 3) /* Extra watchdog resolution */
67#define M41T80_FEATURE_SQ_ALT (1 << 4) /* RSx bits are in reg 4 */ 67#define M41T80_FEATURE_SQ_ALT (1 << 4) /* RSx bits are in reg 4 */
68 68
69#define DRV_VERSION "0.05"
70
71static DEFINE_MUTEX(m41t80_rtc_mutex); 69static DEFINE_MUTEX(m41t80_rtc_mutex);
72static const struct i2c_device_id m41t80_id[] = { 70static const struct i2c_device_id m41t80_id[] = {
73 { "m41t62", M41T80_FEATURE_SQ | M41T80_FEATURE_SQ_ALT }, 71 { "m41t62", M41T80_FEATURE_SQ | M41T80_FEATURE_SQ_ALT },
@@ -80,6 +78,7 @@ static const struct i2c_device_id m41t80_id[] = {
80 { "m41st84", M41T80_FEATURE_HT | M41T80_FEATURE_BL | M41T80_FEATURE_SQ }, 78 { "m41st84", M41T80_FEATURE_HT | M41T80_FEATURE_BL | M41T80_FEATURE_SQ },
81 { "m41st85", M41T80_FEATURE_HT | M41T80_FEATURE_BL | M41T80_FEATURE_SQ }, 79 { "m41st85", M41T80_FEATURE_HT | M41T80_FEATURE_BL | M41T80_FEATURE_SQ },
82 { "m41st87", M41T80_FEATURE_HT | M41T80_FEATURE_BL | M41T80_FEATURE_SQ }, 80 { "m41st87", M41T80_FEATURE_HT | M41T80_FEATURE_BL | M41T80_FEATURE_SQ },
81 { "rv4162", M41T80_FEATURE_SQ | M41T80_FEATURE_WD | M41T80_FEATURE_SQ_ALT },
83 { } 82 { }
84}; 83};
85MODULE_DEVICE_TABLE(i2c, m41t80_id); 84MODULE_DEVICE_TABLE(i2c, m41t80_id);
@@ -232,7 +231,7 @@ static ssize_t m41t80_sysfs_show_flags(struct device *dev,
232 231
233 val = i2c_smbus_read_byte_data(client, M41T80_REG_FLAGS); 232 val = i2c_smbus_read_byte_data(client, M41T80_REG_FLAGS);
234 if (val < 0) 233 if (val < 0)
235 return -EIO; 234 return val;
236 return sprintf(buf, "%#x\n", val); 235 return sprintf(buf, "%#x\n", val);
237} 236}
238static DEVICE_ATTR(flags, S_IRUGO, m41t80_sysfs_show_flags, NULL); 237static DEVICE_ATTR(flags, S_IRUGO, m41t80_sysfs_show_flags, NULL);
@@ -252,7 +251,7 @@ static ssize_t m41t80_sysfs_show_sqwfreq(struct device *dev,
252 reg_sqw = M41T80_REG_WDAY; 251 reg_sqw = M41T80_REG_WDAY;
253 val = i2c_smbus_read_byte_data(client, reg_sqw); 252 val = i2c_smbus_read_byte_data(client, reg_sqw);
254 if (val < 0) 253 if (val < 0)
255 return -EIO; 254 return val;
256 val = (val >> 4) & 0xf; 255 val = (val >> 4) & 0xf;
257 switch (val) { 256 switch (val) {
258 case 0: 257 case 0:
@@ -271,7 +270,7 @@ static ssize_t m41t80_sysfs_set_sqwfreq(struct device *dev,
271{ 270{
272 struct i2c_client *client = to_i2c_client(dev); 271 struct i2c_client *client = to_i2c_client(dev);
273 struct m41t80_data *clientdata = i2c_get_clientdata(client); 272 struct m41t80_data *clientdata = i2c_get_clientdata(client);
274 int almon, sqw, reg_sqw; 273 int almon, sqw, reg_sqw, rc;
275 int val = simple_strtoul(buf, NULL, 0); 274 int val = simple_strtoul(buf, NULL, 0);
276 275
277 if (!(clientdata->features & M41T80_FEATURE_SQ)) 276 if (!(clientdata->features & M41T80_FEATURE_SQ))
@@ -291,21 +290,30 @@ static ssize_t m41t80_sysfs_set_sqwfreq(struct device *dev,
291 /* disable SQW, set SQW frequency & re-enable */ 290 /* disable SQW, set SQW frequency & re-enable */
292 almon = i2c_smbus_read_byte_data(client, M41T80_REG_ALARM_MON); 291 almon = i2c_smbus_read_byte_data(client, M41T80_REG_ALARM_MON);
293 if (almon < 0) 292 if (almon < 0)
294 return -EIO; 293 return almon;
295 reg_sqw = M41T80_REG_SQW; 294 reg_sqw = M41T80_REG_SQW;
296 if (clientdata->features & M41T80_FEATURE_SQ_ALT) 295 if (clientdata->features & M41T80_FEATURE_SQ_ALT)
297 reg_sqw = M41T80_REG_WDAY; 296 reg_sqw = M41T80_REG_WDAY;
298 sqw = i2c_smbus_read_byte_data(client, reg_sqw); 297 sqw = i2c_smbus_read_byte_data(client, reg_sqw);
299 if (sqw < 0) 298 if (sqw < 0)
300 return -EIO; 299 return sqw;
301 sqw = (sqw & 0x0f) | (val << 4); 300 sqw = (sqw & 0x0f) | (val << 4);
302 if (i2c_smbus_write_byte_data(client, M41T80_REG_ALARM_MON, 301
303 almon & ~M41T80_ALMON_SQWE) < 0 || 302 rc = i2c_smbus_write_byte_data(client, M41T80_REG_ALARM_MON,
304 i2c_smbus_write_byte_data(client, reg_sqw, sqw) < 0) 303 almon & ~M41T80_ALMON_SQWE);
305 return -EIO; 304 if (rc < 0)
306 if (val && i2c_smbus_write_byte_data(client, M41T80_REG_ALARM_MON, 305 return rc;
307 almon | M41T80_ALMON_SQWE) < 0) 306
308 return -EIO; 307 if (val) {
308 rc = i2c_smbus_write_byte_data(client, reg_sqw, sqw);
309 if (rc < 0)
310 return rc;
311
312 rc = i2c_smbus_write_byte_data(client, M41T80_REG_ALARM_MON,
313 almon | M41T80_ALMON_SQWE);
314 if (rc <0)
315 return rc;
316 }
309 return count; 317 return count;
310} 318}
311static DEVICE_ATTR(sqwfreq, S_IRUGO | S_IWUSR, 319static DEVICE_ATTR(sqwfreq, S_IRUGO | S_IWUSR,
@@ -629,40 +637,28 @@ static int m41t80_probe(struct i2c_client *client,
629 struct m41t80_data *clientdata = NULL; 637 struct m41t80_data *clientdata = NULL;
630 638
631 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C 639 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C
632 | I2C_FUNC_SMBUS_BYTE_DATA)) { 640 | I2C_FUNC_SMBUS_BYTE_DATA))
633 rc = -ENODEV; 641 return -ENODEV;
634 goto exit;
635 }
636
637 dev_info(&client->dev,
638 "chip found, driver version " DRV_VERSION "\n");
639 642
640 clientdata = devm_kzalloc(&client->dev, sizeof(*clientdata), 643 clientdata = devm_kzalloc(&client->dev, sizeof(*clientdata),
641 GFP_KERNEL); 644 GFP_KERNEL);
642 if (!clientdata) { 645 if (!clientdata)
643 rc = -ENOMEM; 646 return -ENOMEM;
644 goto exit;
645 }
646 647
647 clientdata->features = id->driver_data; 648 clientdata->features = id->driver_data;
648 i2c_set_clientdata(client, clientdata); 649 i2c_set_clientdata(client, clientdata);
649 650
650 rtc = devm_rtc_device_register(&client->dev, client->name, 651 rtc = devm_rtc_device_register(&client->dev, client->name,
651 &m41t80_rtc_ops, THIS_MODULE); 652 &m41t80_rtc_ops, THIS_MODULE);
652 if (IS_ERR(rtc)) { 653 if (IS_ERR(rtc))
653 rc = PTR_ERR(rtc); 654 return PTR_ERR(rtc);
654 rtc = NULL;
655 goto exit;
656 }
657 655
658 clientdata->rtc = rtc; 656 clientdata->rtc = rtc;
659 657
660 /* Make sure HT (Halt Update) bit is cleared */ 658 /* Make sure HT (Halt Update) bit is cleared */
661 rc = i2c_smbus_read_byte_data(client, M41T80_REG_ALARM_HOUR); 659 rc = i2c_smbus_read_byte_data(client, M41T80_REG_ALARM_HOUR);
662 if (rc < 0)
663 goto ht_err;
664 660
665 if (rc & M41T80_ALHOUR_HT) { 661 if (rc >= 0 && rc & M41T80_ALHOUR_HT) {
666 if (clientdata->features & M41T80_FEATURE_HT) { 662 if (clientdata->features & M41T80_FEATURE_HT) {
667 m41t80_get_datetime(client, &tm); 663 m41t80_get_datetime(client, &tm);
668 dev_info(&client->dev, "HT bit was set!\n"); 664 dev_info(&client->dev, "HT bit was set!\n");
@@ -673,53 +669,44 @@ static int m41t80_probe(struct i2c_client *client,
673 tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, 669 tm.tm_mon + 1, tm.tm_mday, tm.tm_hour,
674 tm.tm_min, tm.tm_sec); 670 tm.tm_min, tm.tm_sec);
675 } 671 }
676 if (i2c_smbus_write_byte_data(client, 672 rc = i2c_smbus_write_byte_data(client, M41T80_REG_ALARM_HOUR,
677 M41T80_REG_ALARM_HOUR, 673 rc & ~M41T80_ALHOUR_HT);
678 rc & ~M41T80_ALHOUR_HT) < 0) 674 }
679 goto ht_err; 675
676 if (rc < 0) {
677 dev_err(&client->dev, "Can't clear HT bit\n");
678 return rc;
680 } 679 }
681 680
682 /* Make sure ST (stop) bit is cleared */ 681 /* Make sure ST (stop) bit is cleared */
683 rc = i2c_smbus_read_byte_data(client, M41T80_REG_SEC); 682 rc = i2c_smbus_read_byte_data(client, M41T80_REG_SEC);
684 if (rc < 0)
685 goto st_err;
686 683
687 if (rc & M41T80_SEC_ST) { 684 if (rc >= 0 && rc & M41T80_SEC_ST)
688 if (i2c_smbus_write_byte_data(client, M41T80_REG_SEC, 685 rc = i2c_smbus_write_byte_data(client, M41T80_REG_SEC,
689 rc & ~M41T80_SEC_ST) < 0) 686 rc & ~M41T80_SEC_ST);
690 goto st_err; 687 if (rc < 0) {
688 dev_err(&client->dev, "Can't clear ST bit\n");
689 return rc;
691 } 690 }
692 691
693 rc = m41t80_sysfs_register(&client->dev); 692 rc = m41t80_sysfs_register(&client->dev);
694 if (rc) 693 if (rc)
695 goto exit; 694 return rc;
696 695
697#ifdef CONFIG_RTC_DRV_M41T80_WDT 696#ifdef CONFIG_RTC_DRV_M41T80_WDT
698 if (clientdata->features & M41T80_FEATURE_HT) { 697 if (clientdata->features & M41T80_FEATURE_HT) {
699 save_client = client; 698 save_client = client;
700 rc = misc_register(&wdt_dev); 699 rc = misc_register(&wdt_dev);
701 if (rc) 700 if (rc)
702 goto exit; 701 return rc;
703 rc = register_reboot_notifier(&wdt_notifier); 702 rc = register_reboot_notifier(&wdt_notifier);
704 if (rc) { 703 if (rc) {
705 misc_deregister(&wdt_dev); 704 misc_deregister(&wdt_dev);
706 goto exit; 705 return rc;
707 } 706 }
708 } 707 }
709#endif 708#endif
710 return 0; 709 return 0;
711
712st_err:
713 rc = -EIO;
714 dev_err(&client->dev, "Can't clear ST bit\n");
715 goto exit;
716ht_err:
717 rc = -EIO;
718 dev_err(&client->dev, "Can't clear HT bit\n");
719 goto exit;
720
721exit:
722 return rc;
723} 710}
724 711
725static int m41t80_remove(struct i2c_client *client) 712static int m41t80_remove(struct i2c_client *client)
@@ -750,4 +737,3 @@ module_i2c_driver(m41t80_driver);
750MODULE_AUTHOR("Alexander Bigga <ab@mycable.de>"); 737MODULE_AUTHOR("Alexander Bigga <ab@mycable.de>");
751MODULE_DESCRIPTION("ST Microelectronics M41T80 series RTC I2C Client Driver"); 738MODULE_DESCRIPTION("ST Microelectronics M41T80 series RTC I2C Client Driver");
752MODULE_LICENSE("GPL"); 739MODULE_LICENSE("GPL");
753MODULE_VERSION(DRV_VERSION);
diff --git a/drivers/rtc/rtc-mcp795.c b/drivers/rtc/rtc-mcp795.c
new file mode 100644
index 000000000000..34295bf00416
--- /dev/null
+++ b/drivers/rtc/rtc-mcp795.c
@@ -0,0 +1,199 @@
1/*
2 * SPI Driver for Microchip MCP795 RTC
3 *
4 * Copyright (C) Josef Gajdusek <atx@atx.name>
5 *
6 * based on other Linux RTC drivers
7 *
8 * Device datasheet:
9 * http://ww1.microchip.com/downloads/en/DeviceDoc/22280A.pdf
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 *
15 * */
16
17#include <linux/module.h>
18#include <linux/kernel.h>
19#include <linux/device.h>
20#include <linux/printk.h>
21#include <linux/spi/spi.h>
22#include <linux/rtc.h>
23
24/* MCP795 Instructions, see datasheet table 3-1 */
25#define MCP795_EEREAD 0x03
26#define MCP795_EEWRITE 0x02
27#define MCP795_EEWRDI 0x04
28#define MCP795_EEWREN 0x06
29#define MCP795_SRREAD 0x05
30#define MCP795_SRWRITE 0x01
31#define MCP795_READ 0x13
32#define MCP795_WRITE 0x12
33#define MCP795_UNLOCK 0x14
34#define MCP795_IDWRITE 0x32
35#define MCP795_IDREAD 0x33
36#define MCP795_CLRWDT 0x44
37#define MCP795_CLRRAM 0x54
38
39#define MCP795_ST_BIT 0x80
40#define MCP795_24_BIT 0x40
41
42static int mcp795_rtcc_read(struct device *dev, u8 addr, u8 *buf, u8 count)
43{
44 struct spi_device *spi = to_spi_device(dev);
45 int ret;
46 u8 tx[2];
47
48 tx[0] = MCP795_READ;
49 tx[1] = addr;
50 ret = spi_write_then_read(spi, tx, sizeof(tx), buf, count);
51
52 if (ret)
53 dev_err(dev, "Failed reading %d bytes from address %x.\n",
54 count, addr);
55
56 return ret;
57}
58
59static int mcp795_rtcc_write(struct device *dev, u8 addr, u8 *data, u8 count)
60{
61 struct spi_device *spi = to_spi_device(dev);
62 int ret;
63 u8 tx[2 + count];
64
65 tx[0] = MCP795_WRITE;
66 tx[1] = addr;
67 memcpy(&tx[2], data, count);
68
69 ret = spi_write(spi, tx, 2 + count);
70
71 if (ret)
72 dev_err(dev, "Failed to write %d bytes to address %x.\n",
73 count, addr);
74
75 return ret;
76}
77
78static int mcp795_rtcc_set_bits(struct device *dev, u8 addr, u8 mask, u8 state)
79{
80 int ret;
81 u8 tmp;
82
83 ret = mcp795_rtcc_read(dev, addr, &tmp, 1);
84 if (ret)
85 return ret;
86
87 if ((tmp & mask) != state) {
88 tmp = (tmp & ~mask) | state;
89 ret = mcp795_rtcc_write(dev, addr, &tmp, 1);
90 }
91
92 return ret;
93}
94
95static int mcp795_set_time(struct device *dev, struct rtc_time *tim)
96{
97 int ret;
98 u8 data[7];
99
100 /* Read first, so we can leave config bits untouched */
101 ret = mcp795_rtcc_read(dev, 0x01, data, sizeof(data));
102
103 if (ret)
104 return ret;
105
106 data[0] = (data[0] & 0x80) | ((tim->tm_sec / 10) << 4) | (tim->tm_sec % 10);
107 data[1] = (data[1] & 0x80) | ((tim->tm_min / 10) << 4) | (tim->tm_min % 10);
108 data[2] = ((tim->tm_hour / 10) << 4) | (tim->tm_hour % 10);
109 data[4] = ((tim->tm_mday / 10) << 4) | ((tim->tm_mday) % 10);
110 data[5] = (data[5] & 0x10) | (tim->tm_mon / 10) | (tim->tm_mon % 10);
111
112 if (tim->tm_year > 100)
113 tim->tm_year -= 100;
114
115 data[6] = ((tim->tm_year / 10) << 4) | (tim->tm_year % 10);
116
117 ret = mcp795_rtcc_write(dev, 0x01, data, sizeof(data));
118
119 if (ret)
120 return ret;
121
122 dev_dbg(dev, "Set mcp795: %04d-%02d-%02d %02d:%02d:%02d\n",
123 tim->tm_year + 1900, tim->tm_mon, tim->tm_mday,
124 tim->tm_hour, tim->tm_min, tim->tm_sec);
125
126 return 0;
127}
128
129static int mcp795_read_time(struct device *dev, struct rtc_time *tim)
130{
131 int ret;
132 u8 data[7];
133
134 ret = mcp795_rtcc_read(dev, 0x01, data, sizeof(data));
135
136 if (ret)
137 return ret;
138
139 tim->tm_sec = ((data[0] & 0x70) >> 4) * 10 + (data[0] & 0x0f);
140 tim->tm_min = ((data[1] & 0x70) >> 4) * 10 + (data[1] & 0x0f);
141 tim->tm_hour = ((data[2] & 0x30) >> 4) * 10 + (data[2] & 0x0f);
142 tim->tm_mday = ((data[4] & 0x30) >> 4) * 10 + (data[4] & 0x0f);
143 tim->tm_mon = ((data[5] & 0x10) >> 4) * 10 + (data[5] & 0x0f);
144 tim->tm_year = ((data[6] & 0xf0) >> 4) * 10 + (data[6] & 0x0f) + 100; /* Assume we are in 20xx */
145
146 dev_dbg(dev, "Read from mcp795: %04d-%02d-%02d %02d:%02d:%02d\n",
147 tim->tm_year + 1900, tim->tm_mon, tim->tm_mday,
148 tim->tm_hour, tim->tm_min, tim->tm_sec);
149
150 return rtc_valid_tm(tim);
151}
152
153static struct rtc_class_ops mcp795_rtc_ops = {
154 .read_time = mcp795_read_time,
155 .set_time = mcp795_set_time
156};
157
158static int mcp795_probe(struct spi_device *spi)
159{
160 struct rtc_device *rtc;
161 int ret;
162
163 spi->mode = SPI_MODE_0;
164 spi->bits_per_word = 8;
165 ret = spi_setup(spi);
166 if (ret) {
167 dev_err(&spi->dev, "Unable to setup SPI\n");
168 return ret;
169 }
170
171 /* Start the oscillator */
172 mcp795_rtcc_set_bits(&spi->dev, 0x01, MCP795_ST_BIT, MCP795_ST_BIT);
173 /* Clear the 12 hour mode flag*/
174 mcp795_rtcc_set_bits(&spi->dev, 0x03, MCP795_24_BIT, 0);
175
176 rtc = devm_rtc_device_register(&spi->dev, "rtc-mcp795",
177 &mcp795_rtc_ops, THIS_MODULE);
178 if (IS_ERR(rtc))
179 return PTR_ERR(rtc);
180
181 spi_set_drvdata(spi, rtc);
182
183 return 0;
184}
185
186static struct spi_driver mcp795_driver = {
187 .driver = {
188 .name = "rtc-mcp795",
189 .owner = THIS_MODULE,
190 },
191 .probe = mcp795_probe,
192};
193
194module_spi_driver(mcp795_driver);
195
196MODULE_DESCRIPTION("MCP795 RTC SPI Driver");
197MODULE_AUTHOR("Josef Gajdusek <atx@atx.name>");
198MODULE_LICENSE("GPL");
199MODULE_ALIAS("spi:mcp795");
diff --git a/drivers/rtc/rtc-mv.c b/drivers/rtc/rtc-mv.c
index d15a999363fc..6aaec2fc7c0d 100644
--- a/drivers/rtc/rtc-mv.c
+++ b/drivers/rtc/rtc-mv.c
@@ -319,7 +319,7 @@ static int __exit mv_rtc_remove(struct platform_device *pdev)
319} 319}
320 320
321#ifdef CONFIG_OF 321#ifdef CONFIG_OF
322static struct of_device_id rtc_mv_of_match_table[] = { 322static const struct of_device_id rtc_mv_of_match_table[] = {
323 { .compatible = "marvell,orion-rtc", }, 323 { .compatible = "marvell,orion-rtc", },
324 {} 324 {}
325}; 325};
diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c
index 26de5f8c2ae4..21142e6574a9 100644
--- a/drivers/rtc/rtc-omap.c
+++ b/drivers/rtc/rtc-omap.c
@@ -73,43 +73,52 @@
73#define OMAP_RTC_IRQWAKEEN 0x7c 73#define OMAP_RTC_IRQWAKEEN 0x7c
74 74
75/* OMAP_RTC_CTRL_REG bit fields: */ 75/* OMAP_RTC_CTRL_REG bit fields: */
76#define OMAP_RTC_CTRL_SPLIT (1<<7) 76#define OMAP_RTC_CTRL_SPLIT BIT(7)
77#define OMAP_RTC_CTRL_DISABLE (1<<6) 77#define OMAP_RTC_CTRL_DISABLE BIT(6)
78#define OMAP_RTC_CTRL_SET_32_COUNTER (1<<5) 78#define OMAP_RTC_CTRL_SET_32_COUNTER BIT(5)
79#define OMAP_RTC_CTRL_TEST (1<<4) 79#define OMAP_RTC_CTRL_TEST BIT(4)
80#define OMAP_RTC_CTRL_MODE_12_24 (1<<3) 80#define OMAP_RTC_CTRL_MODE_12_24 BIT(3)
81#define OMAP_RTC_CTRL_AUTO_COMP (1<<2) 81#define OMAP_RTC_CTRL_AUTO_COMP BIT(2)
82#define OMAP_RTC_CTRL_ROUND_30S (1<<1) 82#define OMAP_RTC_CTRL_ROUND_30S BIT(1)
83#define OMAP_RTC_CTRL_STOP (1<<0) 83#define OMAP_RTC_CTRL_STOP BIT(0)
84 84
85/* OMAP_RTC_STATUS_REG bit fields: */ 85/* OMAP_RTC_STATUS_REG bit fields: */
86#define OMAP_RTC_STATUS_POWER_UP (1<<7) 86#define OMAP_RTC_STATUS_POWER_UP BIT(7)
87#define OMAP_RTC_STATUS_ALARM (1<<6) 87#define OMAP_RTC_STATUS_ALARM BIT(6)
88#define OMAP_RTC_STATUS_1D_EVENT (1<<5) 88#define OMAP_RTC_STATUS_1D_EVENT BIT(5)
89#define OMAP_RTC_STATUS_1H_EVENT (1<<4) 89#define OMAP_RTC_STATUS_1H_EVENT BIT(4)
90#define OMAP_RTC_STATUS_1M_EVENT (1<<3) 90#define OMAP_RTC_STATUS_1M_EVENT BIT(3)
91#define OMAP_RTC_STATUS_1S_EVENT (1<<2) 91#define OMAP_RTC_STATUS_1S_EVENT BIT(2)
92#define OMAP_RTC_STATUS_RUN (1<<1) 92#define OMAP_RTC_STATUS_RUN BIT(1)
93#define OMAP_RTC_STATUS_BUSY (1<<0) 93#define OMAP_RTC_STATUS_BUSY BIT(0)
94 94
95/* OMAP_RTC_INTERRUPTS_REG bit fields: */ 95/* OMAP_RTC_INTERRUPTS_REG bit fields: */
96#define OMAP_RTC_INTERRUPTS_IT_ALARM (1<<3) 96#define OMAP_RTC_INTERRUPTS_IT_ALARM BIT(3)
97#define OMAP_RTC_INTERRUPTS_IT_TIMER (1<<2) 97#define OMAP_RTC_INTERRUPTS_IT_TIMER BIT(2)
98
99/* OMAP_RTC_OSC_REG bit fields: */
100#define OMAP_RTC_OSC_32KCLK_EN BIT(6)
98 101
99/* OMAP_RTC_IRQWAKEEN bit fields: */ 102/* OMAP_RTC_IRQWAKEEN bit fields: */
100#define OMAP_RTC_IRQWAKEEN_ALARM_WAKEEN (1<<1) 103#define OMAP_RTC_IRQWAKEEN_ALARM_WAKEEN BIT(1)
101 104
102/* OMAP_RTC_KICKER values */ 105/* OMAP_RTC_KICKER values */
103#define KICK0_VALUE 0x83e70b13 106#define KICK0_VALUE 0x83e70b13
104#define KICK1_VALUE 0x95a4f1e0 107#define KICK1_VALUE 0x95a4f1e0
105 108
106#define OMAP_RTC_HAS_KICKER 0x1 109#define OMAP_RTC_HAS_KICKER BIT(0)
107 110
108/* 111/*
109 * Few RTC IP revisions has special WAKE-EN Register to enable Wakeup 112 * Few RTC IP revisions has special WAKE-EN Register to enable Wakeup
110 * generation for event Alarm. 113 * generation for event Alarm.
111 */ 114 */
112#define OMAP_RTC_HAS_IRQWAKEEN 0x2 115#define OMAP_RTC_HAS_IRQWAKEEN BIT(1)
116
117/*
118 * Some RTC IP revisions (like those in AM335x and DRA7x) need
119 * the 32KHz clock to be explicitly enabled.
120 */
121#define OMAP_RTC_HAS_32KCLK_EN BIT(2)
113 122
114static void __iomem *rtc_base; 123static void __iomem *rtc_base;
115 124
@@ -162,17 +171,28 @@ static irqreturn_t rtc_irq(int irq, void *rtc)
162 171
163static int omap_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) 172static int omap_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
164{ 173{
165 u8 reg; 174 u8 reg, irqwake_reg = 0;
175 struct platform_device *pdev = to_platform_device(dev);
176 const struct platform_device_id *id_entry =
177 platform_get_device_id(pdev);
166 178
167 local_irq_disable(); 179 local_irq_disable();
168 rtc_wait_not_busy(); 180 rtc_wait_not_busy();
169 reg = rtc_read(OMAP_RTC_INTERRUPTS_REG); 181 reg = rtc_read(OMAP_RTC_INTERRUPTS_REG);
170 if (enabled) 182 if (id_entry->driver_data & OMAP_RTC_HAS_IRQWAKEEN)
183 irqwake_reg = rtc_read(OMAP_RTC_IRQWAKEEN);
184
185 if (enabled) {
171 reg |= OMAP_RTC_INTERRUPTS_IT_ALARM; 186 reg |= OMAP_RTC_INTERRUPTS_IT_ALARM;
172 else 187 irqwake_reg |= OMAP_RTC_IRQWAKEEN_ALARM_WAKEEN;
188 } else {
173 reg &= ~OMAP_RTC_INTERRUPTS_IT_ALARM; 189 reg &= ~OMAP_RTC_INTERRUPTS_IT_ALARM;
190 irqwake_reg &= ~OMAP_RTC_IRQWAKEEN_ALARM_WAKEEN;
191 }
174 rtc_wait_not_busy(); 192 rtc_wait_not_busy();
175 rtc_write(reg, OMAP_RTC_INTERRUPTS_REG); 193 rtc_write(reg, OMAP_RTC_INTERRUPTS_REG);
194 if (id_entry->driver_data & OMAP_RTC_HAS_IRQWAKEEN)
195 rtc_write(irqwake_reg, OMAP_RTC_IRQWAKEEN);
176 local_irq_enable(); 196 local_irq_enable();
177 197
178 return 0; 198 return 0;
@@ -272,7 +292,10 @@ static int omap_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
272 292
273static int omap_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm) 293static int omap_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
274{ 294{
275 u8 reg; 295 u8 reg, irqwake_reg = 0;
296 struct platform_device *pdev = to_platform_device(dev);
297 const struct platform_device_id *id_entry =
298 platform_get_device_id(pdev);
276 299
277 if (tm2bcd(&alm->time) < 0) 300 if (tm2bcd(&alm->time) < 0)
278 return -EINVAL; 301 return -EINVAL;
@@ -288,11 +311,19 @@ static int omap_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
288 rtc_write(alm->time.tm_sec, OMAP_RTC_ALARM_SECONDS_REG); 311 rtc_write(alm->time.tm_sec, OMAP_RTC_ALARM_SECONDS_REG);
289 312
290 reg = rtc_read(OMAP_RTC_INTERRUPTS_REG); 313 reg = rtc_read(OMAP_RTC_INTERRUPTS_REG);
291 if (alm->enabled) 314 if (id_entry->driver_data & OMAP_RTC_HAS_IRQWAKEEN)
315 irqwake_reg = rtc_read(OMAP_RTC_IRQWAKEEN);
316
317 if (alm->enabled) {
292 reg |= OMAP_RTC_INTERRUPTS_IT_ALARM; 318 reg |= OMAP_RTC_INTERRUPTS_IT_ALARM;
293 else 319 irqwake_reg |= OMAP_RTC_IRQWAKEEN_ALARM_WAKEEN;
320 } else {
294 reg &= ~OMAP_RTC_INTERRUPTS_IT_ALARM; 321 reg &= ~OMAP_RTC_INTERRUPTS_IT_ALARM;
322 irqwake_reg &= ~OMAP_RTC_IRQWAKEEN_ALARM_WAKEEN;
323 }
295 rtc_write(reg, OMAP_RTC_INTERRUPTS_REG); 324 rtc_write(reg, OMAP_RTC_INTERRUPTS_REG);
325 if (id_entry->driver_data & OMAP_RTC_HAS_IRQWAKEEN)
326 rtc_write(irqwake_reg, OMAP_RTC_IRQWAKEEN);
296 327
297 local_irq_enable(); 328 local_irq_enable();
298 329
@@ -319,7 +350,8 @@ static struct platform_device_id omap_rtc_devtype[] = {
319 }, 350 },
320 [OMAP_RTC_DATA_AM3352_IDX] = { 351 [OMAP_RTC_DATA_AM3352_IDX] = {
321 .name = "am3352-rtc", 352 .name = "am3352-rtc",
322 .driver_data = OMAP_RTC_HAS_KICKER | OMAP_RTC_HAS_IRQWAKEEN, 353 .driver_data = OMAP_RTC_HAS_KICKER | OMAP_RTC_HAS_IRQWAKEEN |
354 OMAP_RTC_HAS_32KCLK_EN,
323 }, 355 },
324 [OMAP_RTC_DATA_DA830_IDX] = { 356 [OMAP_RTC_DATA_DA830_IDX] = {
325 .name = "da830-rtc", 357 .name = "da830-rtc",
@@ -352,6 +384,12 @@ static int __init omap_rtc_probe(struct platform_device *pdev)
352 if (of_id) 384 if (of_id)
353 pdev->id_entry = of_id->data; 385 pdev->id_entry = of_id->data;
354 386
387 id_entry = platform_get_device_id(pdev);
388 if (!id_entry) {
389 dev_err(&pdev->dev, "no matching device entry\n");
390 return -ENODEV;
391 }
392
355 omap_rtc_timer = platform_get_irq(pdev, 0); 393 omap_rtc_timer = platform_get_irq(pdev, 0);
356 if (omap_rtc_timer <= 0) { 394 if (omap_rtc_timer <= 0) {
357 pr_debug("%s: no update irq?\n", pdev->name); 395 pr_debug("%s: no update irq?\n", pdev->name);
@@ -373,8 +411,7 @@ static int __init omap_rtc_probe(struct platform_device *pdev)
373 pm_runtime_enable(&pdev->dev); 411 pm_runtime_enable(&pdev->dev);
374 pm_runtime_get_sync(&pdev->dev); 412 pm_runtime_get_sync(&pdev->dev);
375 413
376 id_entry = platform_get_device_id(pdev); 414 if (id_entry->driver_data & OMAP_RTC_HAS_KICKER) {
377 if (id_entry && (id_entry->driver_data & OMAP_RTC_HAS_KICKER)) {
378 rtc_writel(KICK0_VALUE, OMAP_RTC_KICK0_REG); 415 rtc_writel(KICK0_VALUE, OMAP_RTC_KICK0_REG);
379 rtc_writel(KICK1_VALUE, OMAP_RTC_KICK1_REG); 416 rtc_writel(KICK1_VALUE, OMAP_RTC_KICK1_REG);
380 } 417 }
@@ -393,6 +430,10 @@ static int __init omap_rtc_probe(struct platform_device *pdev)
393 */ 430 */
394 rtc_write(0, OMAP_RTC_INTERRUPTS_REG); 431 rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
395 432
433 /* enable RTC functional clock */
434 if (id_entry->driver_data & OMAP_RTC_HAS_32KCLK_EN)
435 rtc_writel(OMAP_RTC_OSC_32KCLK_EN, OMAP_RTC_OSC_REG);
436
396 /* clear old status */ 437 /* clear old status */
397 reg = rtc_read(OMAP_RTC_STATUS_REG); 438 reg = rtc_read(OMAP_RTC_STATUS_REG);
398 if (reg & (u8) OMAP_RTC_STATUS_POWER_UP) { 439 if (reg & (u8) OMAP_RTC_STATUS_POWER_UP) {
@@ -452,7 +493,7 @@ static int __init omap_rtc_probe(struct platform_device *pdev)
452 return 0; 493 return 0;
453 494
454fail0: 495fail0:
455 if (id_entry && (id_entry->driver_data & OMAP_RTC_HAS_KICKER)) 496 if (id_entry->driver_data & OMAP_RTC_HAS_KICKER)
456 rtc_writel(0, OMAP_RTC_KICK0_REG); 497 rtc_writel(0, OMAP_RTC_KICK0_REG);
457 pm_runtime_put_sync(&pdev->dev); 498 pm_runtime_put_sync(&pdev->dev);
458 pm_runtime_disable(&pdev->dev); 499 pm_runtime_disable(&pdev->dev);
@@ -469,7 +510,7 @@ static int __exit omap_rtc_remove(struct platform_device *pdev)
469 /* leave rtc running, but disable irqs */ 510 /* leave rtc running, but disable irqs */
470 rtc_write(0, OMAP_RTC_INTERRUPTS_REG); 511 rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
471 512
472 if (id_entry && (id_entry->driver_data & OMAP_RTC_HAS_KICKER)) 513 if (id_entry->driver_data & OMAP_RTC_HAS_KICKER)
473 rtc_writel(0, OMAP_RTC_KICK0_REG); 514 rtc_writel(0, OMAP_RTC_KICK0_REG);
474 515
475 /* Disable the clock/module */ 516 /* Disable the clock/module */
@@ -484,28 +525,16 @@ static u8 irqstat;
484 525
485static int omap_rtc_suspend(struct device *dev) 526static int omap_rtc_suspend(struct device *dev)
486{ 527{
487 u8 irqwake_stat;
488 struct platform_device *pdev = to_platform_device(dev);
489 const struct platform_device_id *id_entry =
490 platform_get_device_id(pdev);
491
492 irqstat = rtc_read(OMAP_RTC_INTERRUPTS_REG); 528 irqstat = rtc_read(OMAP_RTC_INTERRUPTS_REG);
493 529
494 /* FIXME the RTC alarm is not currently acting as a wakeup event 530 /* FIXME the RTC alarm is not currently acting as a wakeup event
495 * source on some platforms, and in fact this enable() call is just 531 * source on some platforms, and in fact this enable() call is just
496 * saving a flag that's never used... 532 * saving a flag that's never used...
497 */ 533 */
498 if (device_may_wakeup(dev)) { 534 if (device_may_wakeup(dev))
499 enable_irq_wake(omap_rtc_alarm); 535 enable_irq_wake(omap_rtc_alarm);
500 536 else
501 if (id_entry->driver_data & OMAP_RTC_HAS_IRQWAKEEN) {
502 irqwake_stat = rtc_read(OMAP_RTC_IRQWAKEEN);
503 irqwake_stat |= OMAP_RTC_IRQWAKEEN_ALARM_WAKEEN;
504 rtc_write(irqwake_stat, OMAP_RTC_IRQWAKEEN);
505 }
506 } else {
507 rtc_write(0, OMAP_RTC_INTERRUPTS_REG); 537 rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
508 }
509 538
510 /* Disable the clock/module */ 539 /* Disable the clock/module */
511 pm_runtime_put_sync(dev); 540 pm_runtime_put_sync(dev);
@@ -515,25 +544,14 @@ static int omap_rtc_suspend(struct device *dev)
515 544
516static int omap_rtc_resume(struct device *dev) 545static int omap_rtc_resume(struct device *dev)
517{ 546{
518 u8 irqwake_stat;
519 struct platform_device *pdev = to_platform_device(dev);
520 const struct platform_device_id *id_entry =
521 platform_get_device_id(pdev);
522
523 /* Enable the clock/module so that we can access the registers */ 547 /* Enable the clock/module so that we can access the registers */
524 pm_runtime_get_sync(dev); 548 pm_runtime_get_sync(dev);
525 549
526 if (device_may_wakeup(dev)) { 550 if (device_may_wakeup(dev))
527 disable_irq_wake(omap_rtc_alarm); 551 disable_irq_wake(omap_rtc_alarm);
528 552 else
529 if (id_entry->driver_data & OMAP_RTC_HAS_IRQWAKEEN) {
530 irqwake_stat = rtc_read(OMAP_RTC_IRQWAKEEN);
531 irqwake_stat &= ~OMAP_RTC_IRQWAKEEN_ALARM_WAKEEN;
532 rtc_write(irqwake_stat, OMAP_RTC_IRQWAKEEN);
533 }
534 } else {
535 rtc_write(irqstat, OMAP_RTC_INTERRUPTS_REG); 553 rtc_write(irqstat, OMAP_RTC_INTERRUPTS_REG);
536 } 554
537 return 0; 555 return 0;
538} 556}
539#endif 557#endif
diff --git a/drivers/rtc/rtc-palmas.c b/drivers/rtc/rtc-palmas.c
index c360d62fb3f6..4dfe2d793fa3 100644
--- a/drivers/rtc/rtc-palmas.c
+++ b/drivers/rtc/rtc-palmas.c
@@ -352,7 +352,7 @@ static SIMPLE_DEV_PM_OPS(palmas_rtc_pm_ops, palmas_rtc_suspend,
352 palmas_rtc_resume); 352 palmas_rtc_resume);
353 353
354#ifdef CONFIG_OF 354#ifdef CONFIG_OF
355static struct of_device_id of_palmas_rtc_match[] = { 355static const struct of_device_id of_palmas_rtc_match[] = {
356 { .compatible = "ti,palmas-rtc"}, 356 { .compatible = "ti,palmas-rtc"},
357 { }, 357 { },
358}; 358};
diff --git a/drivers/rtc/rtc-pxa.c b/drivers/rtc/rtc-pxa.c
index cccbf9d89729..4561f375327d 100644
--- a/drivers/rtc/rtc-pxa.c
+++ b/drivers/rtc/rtc-pxa.c
@@ -389,7 +389,7 @@ static int __exit pxa_rtc_remove(struct platform_device *pdev)
389} 389}
390 390
391#ifdef CONFIG_OF 391#ifdef CONFIG_OF
392static struct of_device_id pxa_rtc_dt_ids[] = { 392static const struct of_device_id pxa_rtc_dt_ids[] = {
393 { .compatible = "marvell,pxa-rtc" }, 393 { .compatible = "marvell,pxa-rtc" },
394 {} 394 {}
395}; 395};
diff --git a/drivers/rtc/rtc-sa1100.c b/drivers/rtc/rtc-sa1100.c
index 0f7adeb1944a..b6e1ca08c2c0 100644
--- a/drivers/rtc/rtc-sa1100.c
+++ b/drivers/rtc/rtc-sa1100.c
@@ -338,7 +338,7 @@ static SIMPLE_DEV_PM_OPS(sa1100_rtc_pm_ops, sa1100_rtc_suspend,
338 sa1100_rtc_resume); 338 sa1100_rtc_resume);
339 339
340#ifdef CONFIG_OF 340#ifdef CONFIG_OF
341static struct of_device_id sa1100_rtc_dt_ids[] = { 341static const struct of_device_id sa1100_rtc_dt_ids[] = {
342 { .compatible = "mrvl,sa1100-rtc", }, 342 { .compatible = "mrvl,sa1100-rtc", },
343 { .compatible = "mrvl,mmp-rtc", }, 343 { .compatible = "mrvl,mmp-rtc", },
344 {} 344 {}
diff --git a/drivers/rtc/rtc-xgene.c b/drivers/rtc/rtc-xgene.c
new file mode 100644
index 000000000000..14129cc85bdb
--- /dev/null
+++ b/drivers/rtc/rtc-xgene.c
@@ -0,0 +1,278 @@
1/*
2 * APM X-Gene SoC Real Time Clock Driver
3 *
4 * Copyright (c) 2014, Applied Micro Circuits Corporation
5 * Author: Rameshwar Prasad Sahu <rsahu@apm.com>
6 * Loc Ho <lho@apm.com>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
20 *
21 */
22
23#include <linux/init.h>
24#include <linux/module.h>
25#include <linux/of.h>
26#include <linux/platform_device.h>
27#include <linux/io.h>
28#include <linux/slab.h>
29#include <linux/clk.h>
30#include <linux/delay.h>
31#include <linux/rtc.h>
32
33/* RTC CSR Registers */
34#define RTC_CCVR 0x00
35#define RTC_CMR 0x04
36#define RTC_CLR 0x08
37#define RTC_CCR 0x0C
38#define RTC_CCR_IE BIT(0)
39#define RTC_CCR_MASK BIT(1)
40#define RTC_CCR_EN BIT(2)
41#define RTC_CCR_WEN BIT(3)
42#define RTC_STAT 0x10
43#define RTC_STAT_BIT BIT(0)
44#define RTC_RSTAT 0x14
45#define RTC_EOI 0x18
46#define RTC_VER 0x1C
47
48struct xgene_rtc_dev {
49 struct rtc_device *rtc;
50 struct device *dev;
51 unsigned long alarm_time;
52 void __iomem *csr_base;
53 struct clk *clk;
54 unsigned int irq_wake;
55};
56
57static int xgene_rtc_read_time(struct device *dev, struct rtc_time *tm)
58{
59 struct xgene_rtc_dev *pdata = dev_get_drvdata(dev);
60
61 rtc_time_to_tm(readl(pdata->csr_base + RTC_CCVR), tm);
62 return rtc_valid_tm(tm);
63}
64
65static int xgene_rtc_set_mmss(struct device *dev, unsigned long secs)
66{
67 struct xgene_rtc_dev *pdata = dev_get_drvdata(dev);
68
69 /*
70 * NOTE: After the following write, the RTC_CCVR is only reflected
71 * after the update cycle of 1 seconds.
72 */
73 writel((u32) secs, pdata->csr_base + RTC_CLR);
74 readl(pdata->csr_base + RTC_CLR); /* Force a barrier */
75
76 return 0;
77}
78
79static int xgene_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
80{
81 struct xgene_rtc_dev *pdata = dev_get_drvdata(dev);
82
83 rtc_time_to_tm(pdata->alarm_time, &alrm->time);
84 alrm->enabled = readl(pdata->csr_base + RTC_CCR) & RTC_CCR_IE;
85
86 return 0;
87}
88
89static int xgene_rtc_alarm_irq_enable(struct device *dev, u32 enabled)
90{
91 struct xgene_rtc_dev *pdata = dev_get_drvdata(dev);
92 u32 ccr;
93
94 ccr = readl(pdata->csr_base + RTC_CCR);
95 if (enabled) {
96 ccr &= ~RTC_CCR_MASK;
97 ccr |= RTC_CCR_IE;
98 } else {
99 ccr &= ~RTC_CCR_IE;
100 ccr |= RTC_CCR_MASK;
101 }
102 writel(ccr, pdata->csr_base + RTC_CCR);
103
104 return 0;
105}
106
107static int xgene_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
108{
109 struct xgene_rtc_dev *pdata = dev_get_drvdata(dev);
110 unsigned long rtc_time;
111 unsigned long alarm_time;
112
113 rtc_time = readl(pdata->csr_base + RTC_CCVR);
114 rtc_tm_to_time(&alrm->time, &alarm_time);
115
116 pdata->alarm_time = alarm_time;
117 writel((u32) pdata->alarm_time, pdata->csr_base + RTC_CMR);
118
119 xgene_rtc_alarm_irq_enable(dev, alrm->enabled);
120
121 return 0;
122}
123
124static const struct rtc_class_ops xgene_rtc_ops = {
125 .read_time = xgene_rtc_read_time,
126 .set_mmss = xgene_rtc_set_mmss,
127 .read_alarm = xgene_rtc_read_alarm,
128 .set_alarm = xgene_rtc_set_alarm,
129 .alarm_irq_enable = xgene_rtc_alarm_irq_enable,
130};
131
132static irqreturn_t xgene_rtc_interrupt(int irq, void *id)
133{
134 struct xgene_rtc_dev *pdata = (struct xgene_rtc_dev *) id;
135
136 /* Check if interrupt asserted */
137 if (!(readl(pdata->csr_base + RTC_STAT) & RTC_STAT_BIT))
138 return IRQ_NONE;
139
140 /* Clear interrupt */
141 readl(pdata->csr_base + RTC_EOI);
142
143 rtc_update_irq(pdata->rtc, 1, RTC_IRQF | RTC_AF);
144
145 return IRQ_HANDLED;
146}
147
148static int xgene_rtc_probe(struct platform_device *pdev)
149{
150 struct xgene_rtc_dev *pdata;
151 struct resource *res;
152 int ret;
153 int irq;
154
155 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
156 if (!pdata)
157 return -ENOMEM;
158 platform_set_drvdata(pdev, pdata);
159 pdata->dev = &pdev->dev;
160
161 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
162 pdata->csr_base = devm_ioremap_resource(&pdev->dev, res);
163 if (IS_ERR(pdata->csr_base))
164 return PTR_ERR(pdata->csr_base);
165
166 irq = platform_get_irq(pdev, 0);
167 if (irq < 0) {
168 dev_err(&pdev->dev, "No IRQ resource\n");
169 return irq;
170 }
171 ret = devm_request_irq(&pdev->dev, irq, xgene_rtc_interrupt, 0,
172 dev_name(&pdev->dev), pdata);
173 if (ret) {
174 dev_err(&pdev->dev, "Could not request IRQ\n");
175 return ret;
176 }
177
178 pdata->clk = devm_clk_get(&pdev->dev, NULL);
179 if (IS_ERR(pdata->clk)) {
180 dev_err(&pdev->dev, "Couldn't get the clock for RTC\n");
181 return -ENODEV;
182 }
183 clk_prepare_enable(pdata->clk);
184
185 /* Turn on the clock and the crystal */
186 writel(RTC_CCR_EN, pdata->csr_base + RTC_CCR);
187
188 device_init_wakeup(&pdev->dev, 1);
189
190 pdata->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
191 &xgene_rtc_ops, THIS_MODULE);
192 if (IS_ERR(pdata->rtc)) {
193 clk_disable_unprepare(pdata->clk);
194 return PTR_ERR(pdata->rtc);
195 }
196
197 /* HW does not support update faster than 1 seconds */
198 pdata->rtc->uie_unsupported = 1;
199
200 return 0;
201}
202
203static int xgene_rtc_remove(struct platform_device *pdev)
204{
205 struct xgene_rtc_dev *pdata = platform_get_drvdata(pdev);
206
207 xgene_rtc_alarm_irq_enable(&pdev->dev, 0);
208 device_init_wakeup(&pdev->dev, 0);
209 clk_disable_unprepare(pdata->clk);
210 return 0;
211}
212
213#ifdef CONFIG_PM_SLEEP
214static int xgene_rtc_suspend(struct device *dev)
215{
216 struct platform_device *pdev = to_platform_device(dev);
217 struct xgene_rtc_dev *pdata = platform_get_drvdata(pdev);
218 int irq;
219
220 irq = platform_get_irq(pdev, 0);
221 if (device_may_wakeup(&pdev->dev)) {
222 if (!enable_irq_wake(irq))
223 pdata->irq_wake = 1;
224 } else {
225 xgene_rtc_alarm_irq_enable(dev, 0);
226 clk_disable(pdata->clk);
227 }
228
229 return 0;
230}
231
232static int xgene_rtc_resume(struct device *dev)
233{
234 struct platform_device *pdev = to_platform_device(dev);
235 struct xgene_rtc_dev *pdata = platform_get_drvdata(pdev);
236 int irq;
237
238 irq = platform_get_irq(pdev, 0);
239 if (device_may_wakeup(&pdev->dev)) {
240 if (pdata->irq_wake) {
241 disable_irq_wake(irq);
242 pdata->irq_wake = 0;
243 }
244 } else {
245 clk_enable(pdata->clk);
246 xgene_rtc_alarm_irq_enable(dev, 1);
247 }
248
249 return 0;
250}
251#endif
252
253static SIMPLE_DEV_PM_OPS(xgene_rtc_pm_ops, xgene_rtc_suspend, xgene_rtc_resume);
254
255#ifdef CONFIG_OF
256static const struct of_device_id xgene_rtc_of_match[] = {
257 {.compatible = "apm,xgene-rtc" },
258 { }
259};
260MODULE_DEVICE_TABLE(of, xgene_rtc_of_match);
261#endif
262
263static struct platform_driver xgene_rtc_driver = {
264 .probe = xgene_rtc_probe,
265 .remove = xgene_rtc_remove,
266 .driver = {
267 .owner = THIS_MODULE,
268 .name = "xgene-rtc",
269 .pm = &xgene_rtc_pm_ops,
270 .of_match_table = of_match_ptr(xgene_rtc_of_match),
271 },
272};
273
274module_platform_driver(xgene_rtc_driver);
275
276MODULE_DESCRIPTION("APM X-Gene SoC RTC driver");
277MODULE_AUTHOR("Rameshwar Sahu <rsahu@apm.com>");
278MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-14 05:31:56 -0500