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mfd: adp5585: Add support for a reset pin

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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>
This commit is contained in:
Nuno Sá
2025-07-01 15:32:15 +01:00
committed by Lee Jones
parent ce262d6d62
commit 45ee66c37f
1 changed files with 16 additions and 0 deletions
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16
drivers/mfd/adp5585.c
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@@ -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),