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author | Krzysztof Kozlowski <k.kozlowski@samsung.com> | 2014-06-10 15:18:46 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-06-10 15:34:47 -0700 |
commit | 0c5deb1ea92fefa6ee69e2da8b887723bdecf3d9 (patch) | |
tree | 1fb14a31b5a4696a2c7ae16fa9c1e2abc5c010b9 /drivers/rtc/rtc-s5m.c | |
parent | f8b23bbdad5dfb50af101a56c58ad4e83510a9a6 (diff) | |
download | linux-0c5deb1ea92fefa6ee69e2da8b887723bdecf3d9.tar.gz linux-0c5deb1ea92fefa6ee69e2da8b887723bdecf3d9.tar.bz2 linux-0c5deb1ea92fefa6ee69e2da8b887723bdecf3d9.zip |
rtc: s5m: add support for S2MPS14 RTC
Add support for S2MPS14 to the rtc-s5m driver. Differences in S2MPS14
(in comparison to S5M8767):
- Layout of registers
- Lack of century support for time and alarms (7 registers used for
storing time/alarm)
- Two buffer control registers: WUDR and RUDR
- No register for enabling writing time
- RTC interrupts are reported in main PMIC I2C device
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Lee Jones <lee.jones@linaro.org>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Sangbeom Kim <sbkim73@samsung.com>
Cc: Samuel Ortiz <sameo@linux.intel.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/rtc/rtc-s5m.c')
-rw-r--r-- | drivers/rtc/rtc-s5m.c | 101 |
1 files changed, 84 insertions, 17 deletions
diff --git a/drivers/rtc/rtc-s5m.c b/drivers/rtc/rtc-s5m.c index 59860128a221..76287ebd0e35 100644 --- a/drivers/rtc/rtc-s5m.c +++ b/drivers/rtc/rtc-s5m.c @@ -17,16 +17,14 @@ #include <linux/module.h> #include <linux/i2c.h> -#include <linux/slab.h> #include <linux/bcd.h> -#include <linux/bitops.h> #include <linux/regmap.h> #include <linux/rtc.h> -#include <linux/delay.h> #include <linux/platform_device.h> #include <linux/mfd/samsung/core.h> #include <linux/mfd/samsung/irq.h> #include <linux/mfd/samsung/rtc.h> +#include <linux/mfd/samsung/s2mps14.h> /* * Maximum number of retries for checking changes in UDR field @@ -74,6 +72,21 @@ static const struct s5m_rtc_reg_config s5m_rtc_regs = { .rtc_udr_mask = S5M_RTC_UDR_MASK, }; +/* + * Register map for S2MPS14. + * It may be also suitable for S2MPS11 but this was not tested. + */ +static const struct s5m_rtc_reg_config s2mps_rtc_regs = { + .regs_count = 7, + .time = S2MPS_RTC_SEC, + .ctrl = S2MPS_RTC_CTRL, + .alarm0 = S2MPS_ALARM0_SEC, + .alarm1 = S2MPS_ALARM1_SEC, + .smpl_wtsr = S2MPS_WTSR_SMPL_CNTL, + .rtc_udr_update = S2MPS_RTC_UDR_CON, + .rtc_udr_mask = S2MPS_RTC_WUDR_MASK, +}; + struct s5m_rtc_info { struct device *dev; struct i2c_client *i2c; @@ -178,6 +191,11 @@ static inline int s5m_check_peding_alarm_interrupt(struct s5m_rtc_info *info, ret = regmap_read(info->regmap, S5M_RTC_STATUS, &val); val &= S5M_ALARM0_STATUS; break; + case S2MPS14X: + ret = regmap_read(info->s5m87xx->regmap_pmic, S2MPS14_REG_ST2, + &val); + val &= S2MPS_ALARM0_STATUS; + break; default: return -EINVAL; } @@ -203,8 +221,9 @@ static inline int s5m8767_rtc_set_time_reg(struct s5m_rtc_info *info) return ret; } - data |= S5M_RTC_TIME_EN_MASK; data |= info->regs->rtc_udr_mask; + if (info->device_type == S5M8763X || info->device_type == S5M8767X) + data |= S5M_RTC_TIME_EN_MASK; ret = regmap_write(info->regmap, info->regs->rtc_udr_update, data); if (ret < 0) { @@ -229,8 +248,18 @@ static inline int s5m8767_rtc_set_alarm_reg(struct s5m_rtc_info *info) return ret; } - data &= ~S5M_RTC_TIME_EN_MASK; data |= info->regs->rtc_udr_mask; + switch (info->device_type) { + case S5M8763X: + case S5M8767X: + data &= ~S5M_RTC_TIME_EN_MASK; + break; + case S2MPS14X: + data |= S2MPS_RTC_RUDR_MASK; + break; + default: + return -EINVAL; + } ret = regmap_write(info->regmap, info->regs->rtc_udr_update, data); if (ret < 0) { @@ -282,6 +311,17 @@ 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) { + ret = regmap_update_bits(info->regmap, + info->regs->rtc_udr_update, + S2MPS_RTC_RUDR_MASK, S2MPS_RTC_RUDR_MASK); + if (ret) { + dev_err(dev, + "Failed to prepare registers for time reading: %d\n", + ret); + return ret; + } + } ret = regmap_bulk_read(info->regmap, info->regs->time, data, info->regs->regs_count); if (ret < 0) @@ -293,6 +333,7 @@ static int s5m_rtc_read_time(struct device *dev, struct rtc_time *tm) break; case S5M8767X: + case S2MPS14X: s5m8767_data_to_tm(data, tm, info->rtc_24hr_mode); break; @@ -318,6 +359,7 @@ static int s5m_rtc_set_time(struct device *dev, struct rtc_time *tm) s5m8763_tm_to_data(tm, data); break; case S5M8767X: + case S2MPS14X: ret = s5m8767_tm_to_data(tm, data); break; default: @@ -364,6 +406,7 @@ static int s5m_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm) break; case S5M8767X: + case S2MPS14X: s5m8767_data_to_tm(data, &alrm->time, info->rtc_24hr_mode); alrm->enabled = 0; for (i = 0; i < info->regs->regs_count; i++) { @@ -411,6 +454,7 @@ static int s5m_rtc_stop_alarm(struct s5m_rtc_info *info) break; case S5M8767X: + case S2MPS14X: for (i = 0; i < info->regs->regs_count; i++) data[i] &= ~ALARM_ENABLE_MASK; @@ -454,6 +498,7 @@ static int s5m_rtc_start_alarm(struct s5m_rtc_info *info) break; case S5M8767X: + case S2MPS14X: data[RTC_SEC] |= ALARM_ENABLE_MASK; data[RTC_MIN] |= ALARM_ENABLE_MASK; data[RTC_HOUR] |= ALARM_ENABLE_MASK; @@ -492,6 +537,7 @@ static int s5m_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) break; case S5M8767X: + case S2MPS14X: s5m8767_tm_to_data(&alrm->time, data); break; @@ -578,19 +624,33 @@ static int s5m8767_rtc_init_reg(struct s5m_rtc_info *info) u8 data[2]; int ret; - /* UDR update time. Default of 7.32 ms is too long. */ - ret = regmap_update_bits(info->regmap, S5M_RTC_UDR_CON, - S5M_RTC_UDR_T_MASK, S5M_RTC_UDR_T_450_US); - if (ret < 0) - dev_err(info->dev, "%s: fail to change UDR time: %d\n", - __func__, ret); + switch (info->device_type) { + case S5M8763X: + case S5M8767X: + /* UDR update time. Default of 7.32 ms is too long. */ + ret = regmap_update_bits(info->regmap, S5M_RTC_UDR_CON, + S5M_RTC_UDR_T_MASK, S5M_RTC_UDR_T_450_US); + if (ret < 0) + dev_err(info->dev, "%s: fail to change UDR time: %d\n", + __func__, ret); - /* Set RTC control register : Binary mode, 24hour mode */ - data[0] = (1 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT); - data[1] = (0 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT); + /* Set RTC control register : Binary mode, 24hour mode */ + data[0] = (1 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT); + data[1] = (0 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT); + + ret = regmap_raw_write(info->regmap, S5M_ALARM0_CONF, data, 2); + break; + + case S2MPS14X: + data[0] = (0 << BCD_EN_SHIFT) | (1 << MODEL24_SHIFT); + ret = regmap_write(info->regmap, info->regs->ctrl, data[0]); + break; + + default: + return -EINVAL; + } info->rtc_24hr_mode = 1; - ret = regmap_raw_write(info->regmap, S5M_ALARM0_CONF, data, 2); if (ret < 0) { dev_err(info->dev, "%s: fail to write controlm reg(%d)\n", __func__, ret); @@ -620,6 +680,7 @@ static int s5m_rtc_probe(struct platform_device *pdev) switch (pdata->device_type) { case S2MPS14X: regmap_cfg = &s2mps14_rtc_regmap_config; + info->regs = &s2mps_rtc_regs; break; case S5M8763X: regmap_cfg = &s5m_rtc_regmap_config; @@ -654,6 +715,11 @@ static int s5m_rtc_probe(struct platform_device *pdev) info->wtsr_smpl = s5m87xx->wtsr_smpl; switch (pdata->device_type) { + case S2MPS14X: + info->irq = regmap_irq_get_virq(s5m87xx->irq_data, + S2MPS14_IRQ_RTCA0); + break; + case S5M8763X: info->irq = regmap_irq_get_virq(s5m87xx->irq_data, S5M8763_IRQ_ALARM0); @@ -768,7 +834,8 @@ static int s5m_rtc_suspend(struct device *dev) 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", 0 }, + { "s5m-rtc", S5M8767X }, + { "s2mps14-rtc", S2MPS14X }, }; static struct platform_driver s5m_rtc_driver = { @@ -787,6 +854,6 @@ module_platform_driver(s5m_rtc_driver); /* Module information */ MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>"); -MODULE_DESCRIPTION("Samsung S5M RTC driver"); +MODULE_DESCRIPTION("Samsung S5M/S2MPS14 RTC driver"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:s5m-rtc"); |