drivers/rtc/rtc-s5m.c: add support for S2MPS13 RTC

The S2MPS13 RTC is almost the same as S2MPS14. The differences when
updating alarm are:
1. Set WUDR+AUDR field instead of WUDR+RUDR.
2. Clear the AUDR field later (it is not auto-cleared).

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 19 insertions, 1 deletions

diff --git a/drivers/rtc/rtc-s5m.c b/drivers/rtc/rtc-s5m.c
index 4008b84246ca..f0cb0ecb3d8d 100644
--- a/drivers/rtc/rtc-s5m.c
+++ b/drivers/rtc/rtc-s5m.c
@@ -187,6 +187,7 @@ static inline int s5m_check_peding_alarm_interrupt(struct s5m_rtc_info *info,
                 val &= S5M_ALARM0_STATUS;
                 break;
         case S2MPS14X:
+        case S2MPS13X:
                 ret = regmap_read(info->s5m87xx->regmap_pmic, S2MPS14_REG_ST2,
                                 &val);
                 val &= S2MPS_ALARM0_STATUS;
@@ -252,6 +253,9 @@ static inline int s5m8767_rtc_set_alarm_reg(struct s5m_rtc_info *info)
         case S2MPS14X:
                 data |= S2MPS_RTC_RUDR_MASK;
                 break;
+        case S2MPS13X:
+                data |= S2MPS13_RTC_AUDR_MASK;
+                break;
         default:
                 return -EINVAL;
         }
@@ -265,6 +269,11 @@ static inline int s5m8767_rtc_set_alarm_reg(struct s5m_rtc_info *info)
 
         ret = s5m8767_wait_for_udr_update(info);
 
+        /* On S2MPS13 the AUDR is not auto-cleared */
+        if (info->device_type == S2MPS13X)
+                regmap_update_bits(info->regmap, info->regs->rtc_udr_update,
+                                   S2MPS13_RTC_AUDR_MASK, 0);
+
         return ret;
 }
 
@@ -306,7 +315,7 @@ static int s5m_rtc_read_time(struct device *dev, struct rtc_time *tm)
         u8 data[info->regs->regs_count];
         int ret;
 
-        if (info->device_type == S2MPS14X) {
+        if (info->device_type == S2MPS14X || info->device_type == S2MPS13X) {
                 ret = regmap_update_bits(info->regmap,
                                 info->regs->rtc_udr_update,
                                 S2MPS_RTC_RUDR_MASK, S2MPS_RTC_RUDR_MASK);
@@ -329,6 +338,7 @@ static int s5m_rtc_read_time(struct device *dev, struct rtc_time *tm)
 
         case S5M8767X:
         case S2MPS14X:
+        case S2MPS13X:
                 s5m8767_data_to_tm(data, tm, info->rtc_24hr_mode);
                 break;
 
@@ -355,6 +365,7 @@ static int s5m_rtc_set_time(struct device *dev, struct rtc_time *tm)
                 break;
         case S5M8767X:
         case S2MPS14X:
+        case S2MPS13X:
                 ret = s5m8767_tm_to_data(tm, data);
                 break;
         default:
@@ -402,6 +413,7 @@ static int s5m_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
 
         case S5M8767X:
         case S2MPS14X:
+        case S2MPS13X:
                 s5m8767_data_to_tm(data, &alrm->time, info->rtc_24hr_mode);
                 alrm->enabled = 0;
                 for (i = 0; i < info->regs->regs_count; i++) {
@@ -450,6 +462,7 @@ static int s5m_rtc_stop_alarm(struct s5m_rtc_info *info)
 
         case S5M8767X:
         case S2MPS14X:
+        case S2MPS13X:
                 for (i = 0; i < info->regs->regs_count; i++)
                         data[i] &= ~ALARM_ENABLE_MASK;
 
@@ -494,6 +507,7 @@ static int s5m_rtc_start_alarm(struct s5m_rtc_info *info)
 
         case S5M8767X:
         case S2MPS14X:
+        case S2MPS13X:
                 data[RTC_SEC] |= ALARM_ENABLE_MASK;
                 data[RTC_MIN] |= ALARM_ENABLE_MASK;
                 data[RTC_HOUR] |= ALARM_ENABLE_MASK;
@@ -533,6 +547,7 @@ static int s5m_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
 
         case S5M8767X:
         case S2MPS14X:
+        case S2MPS13X:
                 s5m8767_tm_to_data(&alrm->time, data);
                 break;
 
@@ -615,6 +630,7 @@ static int s5m8767_rtc_init_reg(struct s5m_rtc_info *info)
                 break;
 
         case S2MPS14X:
+        case S2MPS13X:
                 data[0] = (0 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT);
                 ret = regmap_write(info->regmap, info->regs->ctrl, data[0]);
                 break;
@@ -652,6 +668,7 @@ static int s5m_rtc_probe(struct platform_device *pdev)
 
         switch (pdata->device_type) {
         case S2MPS14X:
+        case S2MPS13X:
                 regmap_cfg = &s2mps14_rtc_regmap_config;
                 info->regs = &s2mps_rtc_regs;
                 alarm_irq = S2MPS14_IRQ_RTCA0;
@@ -772,6 +789,7 @@ static SIMPLE_DEV_PM_OPS(s5m_rtc_pm_ops, s5m_rtc_suspend, s5m_rtc_resume);
 
 static const struct platform_device_id s5m_rtc_id[] = {
         { "s5m-rtc",            S5M8767X },
+        { "s2mps13-rtc",        S2MPS13X },
         { "s2mps14-rtc",        S2MPS14X },
         { },
 };