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authorBalaji T K <balajitk@ti.com>2009-12-13 16:16:31 -0500
committerSamuel Ortiz <sameo@linux.intel.com>2009-12-13 18:26:08 -0500
commita6b49ffd2d4bba53ad172b1e78ee51fe15ab195e (patch)
tree1fc03d75e700644c3846c0eaa8b560cd5993d4ec /drivers/rtc
parente8deb28ca8e221de0239eafb3c3d431d8854278e (diff)
rtc: Add twl6030 RTC support
This patch adds support for RTC in phoenix TWL6030. Register offset addresses have changed in TWL6030 rtc-twl.c will hence forth support all twl RTC (4030, 5030, 6030 ..) Signed-off-by: Balaji T K <balajitk@ti.com> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Reviewed-by: Tony Lindgren <tony@atomide.com> Reviewed-by: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/rtc')
-rw-r--r--drivers/rtc/Kconfig6
-rw-r--r--drivers/rtc/rtc-twl.c152
2 files changed, 114 insertions, 44 deletions
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index f2e1004d12c..71fbd6e8edf 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -258,14 +258,14 @@ config RTC_DRV_TWL92330
258 the Menelaus driver; it's not separate module. 258 the Menelaus driver; it's not separate module.
259 259
260config RTC_DRV_TWL4030 260config RTC_DRV_TWL4030
261 tristate "TI TWL4030/TWL5030/TPS659x0" 261 tristate "TI TWL4030/TWL5030/TWL6030/TPS659x0"
262 depends on RTC_CLASS && TWL4030_CORE 262 depends on RTC_CLASS && TWL4030_CORE
263 help 263 help
264 If you say yes here you get support for the RTC on the 264 If you say yes here you get support for the RTC on the
265 TWL4030 family chips, used mostly with OMAP3 platforms. 265 TWL4030/TWL5030/TWL6030 family chips, used mostly with OMAP3 platforms.
266 266
267 This driver can also be built as a module. If so, the module 267 This driver can also be built as a module. If so, the module
268 will be called rtc-twl4030. 268 will be called rtc-twl.
269 269
270config RTC_DRV_S35390A 270config RTC_DRV_S35390A
271 tristate "Seiko Instruments S-35390A" 271 tristate "Seiko Instruments S-35390A"
diff --git a/drivers/rtc/rtc-twl.c b/drivers/rtc/rtc-twl.c
index 7cea920ff6a..c6a83a2a722 100644
--- a/drivers/rtc/rtc-twl.c
+++ b/drivers/rtc/rtc-twl.c
@@ -34,27 +34,75 @@
34/* 34/*
35 * RTC block register offsets (use TWL_MODULE_RTC) 35 * RTC block register offsets (use TWL_MODULE_RTC)
36 */ 36 */
37#define REG_SECONDS_REG 0x00 37enum {
38#define REG_MINUTES_REG 0x01 38 REG_SECONDS_REG = 0,
39#define REG_HOURS_REG 0x02 39 REG_MINUTES_REG,
40#define REG_DAYS_REG 0x03 40 REG_HOURS_REG,
41#define REG_MONTHS_REG 0x04 41 REG_DAYS_REG,
42#define REG_YEARS_REG 0x05 42 REG_MONTHS_REG,
43#define REG_WEEKS_REG 0x06 43 REG_YEARS_REG,
44 44 REG_WEEKS_REG,
45#define REG_ALARM_SECONDS_REG 0x07 45
46#define REG_ALARM_MINUTES_REG 0x08 46 REG_ALARM_SECONDS_REG,
47#define REG_ALARM_HOURS_REG 0x09 47 REG_ALARM_MINUTES_REG,
48#define REG_ALARM_DAYS_REG 0x0A 48 REG_ALARM_HOURS_REG,
49#define REG_ALARM_MONTHS_REG 0x0B 49 REG_ALARM_DAYS_REG,
50#define REG_ALARM_YEARS_REG 0x0C 50 REG_ALARM_MONTHS_REG,
51 51 REG_ALARM_YEARS_REG,
52#define REG_RTC_CTRL_REG 0x0D 52
53#define REG_RTC_STATUS_REG 0x0E 53 REG_RTC_CTRL_REG,
54#define REG_RTC_INTERRUPTS_REG 0x0F 54 REG_RTC_STATUS_REG,
55 55 REG_RTC_INTERRUPTS_REG,
56#define REG_RTC_COMP_LSB_REG 0x10 56
57#define REG_RTC_COMP_MSB_REG 0x11 57 REG_RTC_COMP_LSB_REG,
58 REG_RTC_COMP_MSB_REG,
59};
60const static u8 twl4030_rtc_reg_map[] = {
61 [REG_SECONDS_REG] = 0x00,
62 [REG_MINUTES_REG] = 0x01,
63 [REG_HOURS_REG] = 0x02,
64 [REG_DAYS_REG] = 0x03,
65 [REG_MONTHS_REG] = 0x04,
66 [REG_YEARS_REG] = 0x05,
67 [REG_WEEKS_REG] = 0x06,
68
69 [REG_ALARM_SECONDS_REG] = 0x07,
70 [REG_ALARM_MINUTES_REG] = 0x08,
71 [REG_ALARM_HOURS_REG] = 0x09,
72 [REG_ALARM_DAYS_REG] = 0x0A,
73 [REG_ALARM_MONTHS_REG] = 0x0B,
74 [REG_ALARM_YEARS_REG] = 0x0C,
75
76 [REG_RTC_CTRL_REG] = 0x0D,
77 [REG_RTC_STATUS_REG] = 0x0E,
78 [REG_RTC_INTERRUPTS_REG] = 0x0F,
79
80 [REG_RTC_COMP_LSB_REG] = 0x10,
81 [REG_RTC_COMP_MSB_REG] = 0x11,
82};
83const static u8 twl6030_rtc_reg_map[] = {
84 [REG_SECONDS_REG] = 0x00,
85 [REG_MINUTES_REG] = 0x01,
86 [REG_HOURS_REG] = 0x02,
87 [REG_DAYS_REG] = 0x03,
88 [REG_MONTHS_REG] = 0x04,
89 [REG_YEARS_REG] = 0x05,
90 [REG_WEEKS_REG] = 0x06,
91
92 [REG_ALARM_SECONDS_REG] = 0x08,
93 [REG_ALARM_MINUTES_REG] = 0x09,
94 [REG_ALARM_HOURS_REG] = 0x0A,
95 [REG_ALARM_DAYS_REG] = 0x0B,
96 [REG_ALARM_MONTHS_REG] = 0x0C,
97 [REG_ALARM_YEARS_REG] = 0x0D,
98
99 [REG_RTC_CTRL_REG] = 0x10,
100 [REG_RTC_STATUS_REG] = 0x11,
101 [REG_RTC_INTERRUPTS_REG] = 0x12,
102
103 [REG_RTC_COMP_LSB_REG] = 0x13,
104 [REG_RTC_COMP_MSB_REG] = 0x14,
105};
58 106
59/* RTC_CTRL_REG bitfields */ 107/* RTC_CTRL_REG bitfields */
60#define BIT_RTC_CTRL_REG_STOP_RTC_M 0x01 108#define BIT_RTC_CTRL_REG_STOP_RTC_M 0x01
@@ -84,6 +132,7 @@
84#define ALL_TIME_REGS 6 132#define ALL_TIME_REGS 6
85 133
86/*----------------------------------------------------------------------*/ 134/*----------------------------------------------------------------------*/
135static u8 *rtc_reg_map;
87 136
88/* 137/*
89 * Supports 1 byte read from TWL RTC register. 138 * Supports 1 byte read from TWL RTC register.
@@ -92,7 +141,7 @@ static int twl_rtc_read_u8(u8 *data, u8 reg)
92{ 141{
93 int ret; 142 int ret;
94 143
95 ret = twl_i2c_read_u8(TWL_MODULE_RTC, data, reg); 144 ret = twl_i2c_read_u8(TWL_MODULE_RTC, data, (rtc_reg_map[reg]));
96 if (ret < 0) 145 if (ret < 0)
97 pr_err("twl_rtc: Could not read TWL" 146 pr_err("twl_rtc: Could not read TWL"
98 "register %X - error %d\n", reg, ret); 147 "register %X - error %d\n", reg, ret);
@@ -106,7 +155,7 @@ static int twl_rtc_write_u8(u8 data, u8 reg)
106{ 155{
107 int ret; 156 int ret;
108 157
109 ret = twl_i2c_write_u8(TWL_MODULE_RTC, data, reg); 158 ret = twl_i2c_write_u8(TWL_MODULE_RTC, data, (rtc_reg_map[reg]));
110 if (ret < 0) 159 if (ret < 0)
111 pr_err("twl_rtc: Could not write TWL" 160 pr_err("twl_rtc: Could not write TWL"
112 "register %X - error %d\n", reg, ret); 161 "register %X - error %d\n", reg, ret);
@@ -202,7 +251,7 @@ static int twl_rtc_read_time(struct device *dev, struct rtc_time *tm)
202 return ret; 251 return ret;
203 252
204 ret = twl_i2c_read(TWL_MODULE_RTC, rtc_data, 253 ret = twl_i2c_read(TWL_MODULE_RTC, rtc_data,
205 REG_SECONDS_REG, ALL_TIME_REGS); 254 (rtc_reg_map[REG_SECONDS_REG]), ALL_TIME_REGS);
206 255
207 if (ret < 0) { 256 if (ret < 0) {
208 dev_err(dev, "rtc_read_time error %d\n", ret); 257 dev_err(dev, "rtc_read_time error %d\n", ret);
@@ -244,7 +293,7 @@ static int twl_rtc_set_time(struct device *dev, struct rtc_time *tm)
244 293
245 /* update all the time registers in one shot */ 294 /* update all the time registers in one shot */
246 ret = twl_i2c_write(TWL_MODULE_RTC, rtc_data, 295 ret = twl_i2c_write(TWL_MODULE_RTC, rtc_data,
247 REG_SECONDS_REG, ALL_TIME_REGS); 296 (rtc_reg_map[REG_SECONDS_REG]), ALL_TIME_REGS);
248 if (ret < 0) { 297 if (ret < 0) {
249 dev_err(dev, "rtc_set_time error %d\n", ret); 298 dev_err(dev, "rtc_set_time error %d\n", ret);
250 goto out; 299 goto out;
@@ -267,7 +316,7 @@ static int twl_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
267 int ret; 316 int ret;
268 317
269 ret = twl_i2c_read(TWL_MODULE_RTC, rtc_data, 318 ret = twl_i2c_read(TWL_MODULE_RTC, rtc_data,
270 REG_ALARM_SECONDS_REG, ALL_TIME_REGS); 319 (rtc_reg_map[REG_ALARM_SECONDS_REG]), ALL_TIME_REGS);
271 if (ret < 0) { 320 if (ret < 0) {
272 dev_err(dev, "rtc_read_alarm error %d\n", ret); 321 dev_err(dev, "rtc_read_alarm error %d\n", ret);
273 return ret; 322 return ret;
@@ -306,7 +355,7 @@ static int twl_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
306 355
307 /* update all the alarm registers in one shot */ 356 /* update all the alarm registers in one shot */
308 ret = twl_i2c_write(TWL_MODULE_RTC, alarm_data, 357 ret = twl_i2c_write(TWL_MODULE_RTC, alarm_data,
309 REG_ALARM_SECONDS_REG, ALL_TIME_REGS); 358 (rtc_reg_map[REG_ALARM_SECONDS_REG]), ALL_TIME_REGS);
310 if (ret) { 359 if (ret) {
311 dev_err(dev, "rtc_set_alarm error %d\n", ret); 360 dev_err(dev, "rtc_set_alarm error %d\n", ret);
312 goto out; 361 goto out;
@@ -352,21 +401,23 @@ static irqreturn_t twl_rtc_interrupt(int irq, void *rtc)
352 if (res) 401 if (res)
353 goto out; 402 goto out;
354 403
355 /* Clear on Read enabled. RTC_IT bit of TWL4030_INT_PWR_ISR1 404 if (twl_class_is_4030()) {
356 * needs 2 reads to clear the interrupt. One read is done in 405 /* Clear on Read enabled. RTC_IT bit of TWL4030_INT_PWR_ISR1
357 * do_twl_pwrirq(). Doing the second read, to clear 406 * needs 2 reads to clear the interrupt. One read is done in
358 * the bit. 407 * do_twl_pwrirq(). Doing the second read, to clear
359 * 408 * the bit.
360 * FIXME the reason PWR_ISR1 needs an extra read is that 409 *
361 * RTC_IF retriggered until we cleared REG_ALARM_M above. 410 * FIXME the reason PWR_ISR1 needs an extra read is that
362 * But re-reading like this is a bad hack; by doing so we 411 * RTC_IF retriggered until we cleared REG_ALARM_M above.
363 * risk wrongly clearing status for some other IRQ (losing 412 * But re-reading like this is a bad hack; by doing so we
364 * the interrupt). Be smarter about handling RTC_UF ... 413 * risk wrongly clearing status for some other IRQ (losing
365 */ 414 * the interrupt). Be smarter about handling RTC_UF ...
366 res = twl_i2c_read_u8(TWL4030_MODULE_INT, 415 */
416 res = twl_i2c_read_u8(TWL4030_MODULE_INT,
367 &rd_reg, TWL4030_INT_PWR_ISR1); 417 &rd_reg, TWL4030_INT_PWR_ISR1);
368 if (res) 418 if (res)
369 goto out; 419 goto out;
420 }
370 421
371 /* Notify RTC core on event */ 422 /* Notify RTC core on event */
372 rtc_update_irq(rtc, 1, events); 423 rtc_update_irq(rtc, 1, events);
@@ -432,6 +483,13 @@ static int __devinit twl_rtc_probe(struct platform_device *pdev)
432 goto out1; 483 goto out1;
433 } 484 }
434 485
486 if (twl_class_is_6030()) {
487 twl6030_interrupt_unmask(TWL6030_RTC_INT_MASK,
488 REG_INT_MSK_LINE_A);
489 twl6030_interrupt_unmask(TWL6030_RTC_INT_MASK,
490 REG_INT_MSK_STS_A);
491 }
492
435 /* Check RTC module status, Enable if it is off */ 493 /* Check RTC module status, Enable if it is off */
436 ret = twl_rtc_read_u8(&rd_reg, REG_RTC_CTRL_REG); 494 ret = twl_rtc_read_u8(&rd_reg, REG_RTC_CTRL_REG);
437 if (ret < 0) 495 if (ret < 0)
@@ -472,6 +530,13 @@ static int __devexit twl_rtc_remove(struct platform_device *pdev)
472 530
473 mask_rtc_irq_bit(BIT_RTC_INTERRUPTS_REG_IT_ALARM_M); 531 mask_rtc_irq_bit(BIT_RTC_INTERRUPTS_REG_IT_ALARM_M);
474 mask_rtc_irq_bit(BIT_RTC_INTERRUPTS_REG_IT_TIMER_M); 532 mask_rtc_irq_bit(BIT_RTC_INTERRUPTS_REG_IT_TIMER_M);
533 if (twl_class_is_6030()) {
534 twl6030_interrupt_mask(TWL6030_RTC_INT_MASK,
535 REG_INT_MSK_LINE_A);
536 twl6030_interrupt_mask(TWL6030_RTC_INT_MASK,
537 REG_INT_MSK_STS_A);
538 }
539
475 540
476 free_irq(irq, rtc); 541 free_irq(irq, rtc);
477 542
@@ -526,6 +591,11 @@ static struct platform_driver twl4030rtc_driver = {
526 591
527static int __init twl_rtc_init(void) 592static int __init twl_rtc_init(void)
528{ 593{
594 if (twl_class_is_4030())
595 rtc_reg_map = (u8 *) twl4030_rtc_reg_map;
596 else
597 rtc_reg_map = (u8 *) twl6030_rtc_reg_map;
598
529 return platform_driver_register(&twl4030rtc_driver); 599 return platform_driver_register(&twl4030rtc_driver);
530} 600}
531module_init(twl_rtc_init); 601module_init(twl_rtc_init);