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-rw-r--r--drivers/rtc/rtc-max77686.c90
1 files changed, 80 insertions, 10 deletions
diff --git a/drivers/rtc/rtc-max77686.c b/drivers/rtc/rtc-max77686.c
index 8c4ca35..1f501b6 100644
--- a/drivers/rtc/rtc-max77686.c
+++ b/drivers/rtc/rtc-max77686.c
@@ -57,6 +57,8 @@ struct max77686_rtc_driver_data {
unsigned long delay;
/* Mask used to read RTC registers value */
u8 mask;
+ /* Registers offset to I2C addresses map */
+ const unsigned int *map;
};
struct max77686_rtc_info {
@@ -79,9 +81,69 @@ enum MAX77686_RTC_OP {
MAX77686_RTC_READ,
};
+/* These are not registers but just offsets that are mapped to addresses */
+enum max77686_rtc_reg_offset {
+ REG_RTC_CONTROLM = 0,
+ REG_RTC_CONTROL,
+ REG_RTC_UPDATE0,
+ REG_WTSR_SMPL_CNTL,
+ REG_RTC_SEC,
+ REG_RTC_MIN,
+ REG_RTC_HOUR,
+ REG_RTC_WEEKDAY,
+ REG_RTC_MONTH,
+ REG_RTC_YEAR,
+ REG_RTC_DATE,
+ REG_ALARM1_SEC,
+ REG_ALARM1_MIN,
+ REG_ALARM1_HOUR,
+ REG_ALARM1_WEEKDAY,
+ REG_ALARM1_MONTH,
+ REG_ALARM1_YEAR,
+ REG_ALARM1_DATE,
+ REG_ALARM2_SEC,
+ REG_ALARM2_MIN,
+ REG_ALARM2_HOUR,
+ REG_ALARM2_WEEKDAY,
+ REG_ALARM2_MONTH,
+ REG_ALARM2_YEAR,
+ REG_ALARM2_DATE,
+ REG_RTC_END,
+};
+
+/* Maps RTC registers offset to the MAX77686 register addresses */
+static const unsigned int max77686_map[REG_RTC_END] = {
+ [REG_RTC_CONTROLM] = MAX77686_RTC_CONTROLM,
+ [REG_RTC_CONTROL] = MAX77686_RTC_CONTROL,
+ [REG_RTC_UPDATE0] = MAX77686_RTC_UPDATE0,
+ [REG_WTSR_SMPL_CNTL] = MAX77686_WTSR_SMPL_CNTL,
+ [REG_RTC_SEC] = MAX77686_RTC_SEC,
+ [REG_RTC_MIN] = MAX77686_RTC_MIN,
+ [REG_RTC_HOUR] = MAX77686_RTC_HOUR,
+ [REG_RTC_WEEKDAY] = MAX77686_RTC_WEEKDAY,
+ [REG_RTC_MONTH] = MAX77686_RTC_MONTH,
+ [REG_RTC_YEAR] = MAX77686_RTC_YEAR,
+ [REG_RTC_DATE] = MAX77686_RTC_DATE,
+ [REG_ALARM1_SEC] = MAX77686_ALARM1_SEC,
+ [REG_ALARM1_MIN] = MAX77686_ALARM1_MIN,
+ [REG_ALARM1_HOUR] = MAX77686_ALARM1_HOUR,
+ [REG_ALARM1_WEEKDAY] = MAX77686_ALARM1_WEEKDAY,
+ [REG_ALARM1_MONTH] = MAX77686_ALARM1_MONTH,
+ [REG_ALARM1_YEAR] = MAX77686_ALARM1_YEAR,
+ [REG_ALARM1_DATE] = MAX77686_ALARM1_DATE,
+ [REG_ALARM2_SEC] = MAX77686_ALARM2_SEC,
+ [REG_ALARM2_MIN] = MAX77686_ALARM2_MIN,
+ [REG_ALARM2_HOUR] = MAX77686_ALARM2_HOUR,
+ [REG_ALARM2_WEEKDAY] = MAX77686_ALARM2_WEEKDAY,
+ [REG_ALARM2_MONTH] = MAX77686_ALARM2_MONTH,
+ [REG_ALARM2_YEAR] = MAX77686_ALARM2_YEAR,
+ [REG_ALARM2_DATE] = MAX77686_ALARM2_DATE,
+};
+
static const struct max77686_rtc_driver_data max77686_drv_data = {
.delay = 16000,
.mask = 0x7f,
+ .map = max77686_map,
};
static void max77686_rtc_data_to_tm(u8 *data, struct rtc_time *tm,
@@ -139,7 +201,8 @@ static int max77686_rtc_update(struct max77686_rtc_info *info,
data = 1 << RTC_RBUDR_SHIFT;
ret = regmap_update_bits(info->max77686->rtc_regmap,
- MAX77686_RTC_UPDATE0, data, data);
+ info->drv_data->map[REG_RTC_UPDATE0],
+ data, data);
if (ret < 0)
dev_err(info->dev, "%s: fail to write update reg(ret=%d, data=0x%x)\n",
__func__, ret, data);
@@ -164,7 +227,8 @@ static int max77686_rtc_read_time(struct device *dev, struct rtc_time *tm)
goto out;
ret = regmap_bulk_read(info->max77686->rtc_regmap,
- MAX77686_RTC_SEC, data, ARRAY_SIZE(data));
+ info->drv_data->map[REG_RTC_SEC],
+ data, ARRAY_SIZE(data));
if (ret < 0) {
dev_err(info->dev, "%s: fail to read time reg(%d)\n", __func__, ret);
goto out;
@@ -192,7 +256,8 @@ static int max77686_rtc_set_time(struct device *dev, struct rtc_time *tm)
mutex_lock(&info->lock);
ret = regmap_bulk_write(info->max77686->rtc_regmap,
- MAX77686_RTC_SEC, data, ARRAY_SIZE(data));
+ info->drv_data->map[REG_RTC_SEC],
+ data, ARRAY_SIZE(data));
if (ret < 0) {
dev_err(info->dev, "%s: fail to write time reg(%d)\n", __func__,
ret);
@@ -211,6 +276,7 @@ static int max77686_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
struct max77686_rtc_info *info = dev_get_drvdata(dev);
u8 data[RTC_NR_TIME];
unsigned int val;
+ const unsigned int *map = info->drv_data->map;
int i, ret;
mutex_lock(&info->lock);
@@ -220,7 +286,7 @@ static int max77686_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
goto out;
ret = regmap_bulk_read(info->max77686->rtc_regmap,
- MAX77686_ALARM1_SEC, data, ARRAY_SIZE(data));
+ map[REG_ALARM1_SEC], data, ARRAY_SIZE(data));
if (ret < 0) {
dev_err(info->dev, "%s:%d fail to read alarm reg(%d)\n",
__func__, __LINE__, ret);
@@ -258,6 +324,7 @@ static int max77686_rtc_stop_alarm(struct max77686_rtc_info *info)
u8 data[RTC_NR_TIME];
int ret, i;
struct rtc_time tm;
+ const unsigned int *map = info->drv_data->map;
if (!mutex_is_locked(&info->lock))
dev_warn(info->dev, "%s: should have mutex locked\n", __func__);
@@ -267,7 +334,7 @@ static int max77686_rtc_stop_alarm(struct max77686_rtc_info *info)
goto out;
ret = regmap_bulk_read(info->max77686->rtc_regmap,
- MAX77686_ALARM1_SEC, data, ARRAY_SIZE(data));
+ map[REG_ALARM1_SEC], data, ARRAY_SIZE(data));
if (ret < 0) {
dev_err(info->dev, "%s: fail to read alarm reg(%d)\n",
__func__, ret);
@@ -280,7 +347,7 @@ static int max77686_rtc_stop_alarm(struct max77686_rtc_info *info)
data[i] &= ~ALARM_ENABLE_MASK;
ret = regmap_bulk_write(info->max77686->rtc_regmap,
- MAX77686_ALARM1_SEC, data, ARRAY_SIZE(data));
+ map[REG_ALARM1_SEC], data, ARRAY_SIZE(data));
if (ret < 0) {
dev_err(info->dev, "%s: fail to write alarm reg(%d)\n",
__func__, ret);
@@ -297,6 +364,7 @@ static int max77686_rtc_start_alarm(struct max77686_rtc_info *info)
u8 data[RTC_NR_TIME];
int ret;
struct rtc_time tm;
+ const unsigned int *map = info->drv_data->map;
if (!mutex_is_locked(&info->lock))
dev_warn(info->dev, "%s: should have mutex locked\n", __func__);
@@ -306,7 +374,7 @@ static int max77686_rtc_start_alarm(struct max77686_rtc_info *info)
goto out;
ret = regmap_bulk_read(info->max77686->rtc_regmap,
- MAX77686_ALARM1_SEC, data, ARRAY_SIZE(data));
+ map[REG_ALARM1_SEC], data, ARRAY_SIZE(data));
if (ret < 0) {
dev_err(info->dev, "%s: fail to read alarm reg(%d)\n",
__func__, ret);
@@ -327,7 +395,7 @@ static int max77686_rtc_start_alarm(struct max77686_rtc_info *info)
data[RTC_DATE] |= (1 << ALARM_ENABLE_SHIFT);
ret = regmap_bulk_write(info->max77686->rtc_regmap,
- MAX77686_ALARM1_SEC, data, ARRAY_SIZE(data));
+ map[REG_ALARM1_SEC], data, ARRAY_SIZE(data));
if (ret < 0) {
dev_err(info->dev, "%s: fail to write alarm reg(%d)\n",
__func__, ret);
@@ -356,7 +424,8 @@ static int max77686_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
goto out;
ret = regmap_bulk_write(info->max77686->rtc_regmap,
- MAX77686_ALARM1_SEC, data, ARRAY_SIZE(data));
+ info->drv_data->map[REG_ALARM1_SEC],
+ data, ARRAY_SIZE(data));
if (ret < 0) {
dev_err(info->dev, "%s: fail to write alarm reg(%d)\n",
@@ -422,7 +491,8 @@ static int max77686_rtc_init_reg(struct max77686_rtc_info *info)
info->rtc_24hr_mode = 1;
ret = regmap_bulk_write(info->max77686->rtc_regmap,
- MAX77686_RTC_CONTROLM, data, ARRAY_SIZE(data));
+ info->drv_data->map[REG_RTC_CONTROLM],
+ data, ARRAY_SIZE(data));
if (ret < 0) {
dev_err(info->dev, "%s: fail to write controlm reg(%d)\n",
__func__, ret);
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