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rtc: max77686: Use single-byte writes on MAX77620

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The MAX77620 doesn't support bulk writes, so make sure the regmap code
breaks bulk writes into multiple single-byte writes.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Link: https://lore.kernel.org/r/20200417170825.2551367-3-thierry.reding@gmail.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Thierry Reding 2020-04-17 19:08:25 +02:00 committed by Alexandre Belloni
parent 7d65cf8c1f
commit 63a52f6388
1 changed files with 16 additions and 6 deletions
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22
drivers/rtc/rtc-max77686.c
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@ -78,6 +78,8 @@ struct max77686_rtc_driver_data {
int alarm_pending_status_reg;
/* RTC IRQ CHIP for regmap */
const struct regmap_irq_chip *rtc_irq_chip;
/* regmap configuration for the chip */
const struct regmap_config *regmap_config;
};
struct max77686_rtc_info {
@ -182,6 +184,11 @@ static const struct regmap_irq_chip max77686_rtc_irq_chip = {
.num_irqs = ARRAY_SIZE(max77686_rtc_irqs),
};
static const struct regmap_config max77686_rtc_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
};
static const struct max77686_rtc_driver_data max77686_drv_data = {
.delay = 16000,
.mask = 0x7f,
@ -191,6 +198,13 @@ static const struct max77686_rtc_driver_data max77686_drv_data = {
.alarm_pending_status_reg = MAX77686_REG_STATUS2,
.rtc_i2c_addr = MAX77686_I2C_ADDR_RTC,
.rtc_irq_chip = &max77686_rtc_irq_chip,
.regmap_config = &max77686_rtc_regmap_config,
};
static const struct regmap_config max77620_rtc_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.use_single_write = true,
};
static const struct max77686_rtc_driver_data max77620_drv_data = {
@ -202,6 +216,7 @@ static const struct max77686_rtc_driver_data max77620_drv_data = {
.alarm_pending_status_reg = MAX77686_INVALID_REG,
.rtc_i2c_addr = MAX77620_I2C_ADDR_RTC,
.rtc_irq_chip = &max77686_rtc_irq_chip,
.regmap_config = &max77620_rtc_regmap_config,
};
static const unsigned int max77802_map[REG_RTC_END] = {
@ -658,11 +673,6 @@ static int max77686_rtc_init_reg(struct max77686_rtc_info *info)
return ret;
}
static const struct regmap_config max77686_rtc_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
};
static int max77686_init_rtc_regmap(struct max77686_rtc_info *info)
{
struct device *parent = info->dev->parent;
@ -698,7 +708,7 @@ static int max77686_init_rtc_regmap(struct max77686_rtc_info *info)
}
info->rtc_regmap = devm_regmap_init_i2c(info->rtc,
&max77686_rtc_regmap_config);
info->drv_data->regmap_config);
if (IS_ERR(info->rtc_regmap)) {
ret = PTR_ERR(info->rtc_regmap);
dev_err(info->dev, "Failed to allocate RTC regmap: %d\n", ret);