diff options
| author | Nuno Sá <nuno.sa@analog.com> | 2025-07-01 15:32:15 +0100 |
|---|---|---|
| committer | Lee Jones <lee@kernel.org> | 2025-07-01 21:50:51 +0100 |
| commit | 45ee66c37f9bd8cff7718c70d84e0291d385a093 (patch) | |
| tree | af983400373adc01816593f19dbbe214ae8df270 | |
| parent | ce262d6d629a926c8c9a2075af3b9a270ab6c641 (diff) | |
mfd: adp5585: Add support for a reset pin
Make sure to perform an Hardware reset during probe if the pin is given
in FW.
Signed-off-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20250701-dev-adp5589-fw-v7-20-b1fcfe9e9826@analog.com
Signed-off-by: Lee Jones <lee@kernel.org>
| -rw-r--r-- | drivers/mfd/adp5585.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/mfd/adp5585.c b/drivers/mfd/adp5585.c index 11a26f668653..58f7cebe2ea4 100644 --- a/drivers/mfd/adp5585.c +++ b/drivers/mfd/adp5585.c @@ -12,6 +12,7 @@ #include <linux/device.h> #include <linux/err.h> #include <linux/i2c.h> +#include <linux/gpio/consumer.h> #include <linux/mfd/adp5585.h> #include <linux/mfd/core.h> #include <linux/mod_devicetable.h> @@ -690,6 +691,7 @@ static int adp5585_i2c_probe(struct i2c_client *i2c) { struct regmap_config *regmap_config; struct adp5585_dev *adp5585; + struct gpio_desc *gpio; unsigned int id; int ret; @@ -714,6 +716,20 @@ static int adp5585_i2c_probe(struct i2c_client *i2c) if (ret) return ret; + gpio = devm_gpiod_get_optional(&i2c->dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(gpio)) + return PTR_ERR(gpio); + + /* + * Note the timings are not documented anywhere in the datasheet. They are just + * reasonable values that work. + */ + if (gpio) { + fsleep(30); + gpiod_set_value_cansleep(gpio, 0); + fsleep(60); + } + adp5585->regmap = devm_regmap_init_i2c(i2c, regmap_config); if (IS_ERR(adp5585->regmap)) return dev_err_probe(&i2c->dev, PTR_ERR(adp5585->regmap), |