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| author | Thierry Reding <treding@nvidia.com> | 2020-04-17 19:08:25 +0200 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2020-05-11 16:21:47 +0200 |
| commit | 63a52f63886ab7fa1a28cc7fde08b23682f8fba1 (patch) | |
| tree | 6a058c41554d0154609370dcf1ccdbd5a2eb7446 /drivers/rtc | |
| parent | 7d65cf8c1f0ae59ef87e88067379188b46509538 (diff) | |
| download | linux-63a52f63886ab7fa1a28cc7fde08b23682f8fba1.tar.gz linux-63a52f63886ab7fa1a28cc7fde08b23682f8fba1.tar.bz2 linux-63a52f63886ab7fa1a28cc7fde08b23682f8fba1.zip | |
rtc: max77686: Use single-byte writes on MAX77620
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>
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/rtc-max77686.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/drivers/rtc/rtc-max77686.c b/drivers/rtc/rtc-max77686.c index d5a0e27dd0a0..03ebcf1c0f3d 100644 --- a/drivers/rtc/rtc-max77686.c +++ b/drivers/rtc/rtc-max77686.c @@ -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); |