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hwmon: (ltc2992) Use new GPIO line value setter callbacks

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struct gpio_chip now has callbacks for setting line values that return
an integer, allowing to indicate failures. Convert the driver to using
them.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Link: https://lore.kernel.org/r/20250407-gpiochip-set-rv-hwmon-v1-1-1fa38f34dc07@linaro.org
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
[groeck: Fixed multi-line alignment issue]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Bartosz Golaszewski 2025-04-07 09:16:16 +02:00 committed by Guenter Roeck
parent 73e5b6b51f
commit e894b6442a
1 changed files with 20 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
drivers/hwmon/ltc2992.c
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@ -256,33 +256,38 @@ static int ltc2992_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask
return 0;
}
static void ltc2992_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
static int ltc2992_gpio_set(struct gpio_chip *chip, unsigned int offset,
int value)
{
struct ltc2992_state *st = gpiochip_get_data(chip);
unsigned long gpio_ctrl;
int reg;
int reg, ret;
mutex_lock(&st->gpio_mutex);
reg = ltc2992_read_reg(st, ltc2992_gpio_addr_map[offset].ctrl, 1);
if (reg < 0) {
mutex_unlock(&st->gpio_mutex);
return;
return reg;
}
gpio_ctrl = reg;
assign_bit(ltc2992_gpio_addr_map[offset].ctrl_bit, &gpio_ctrl, value);
ltc2992_write_reg(st, ltc2992_gpio_addr_map[offset].ctrl, 1, gpio_ctrl);
ret = ltc2992_write_reg(st, ltc2992_gpio_addr_map[offset].ctrl, 1,
gpio_ctrl);
mutex_unlock(&st->gpio_mutex);
return ret;
}
static void ltc2992_gpio_set_multiple(struct gpio_chip *chip, unsigned long *mask,
unsigned long *bits)
static int ltc2992_gpio_set_multiple(struct gpio_chip *chip, unsigned long *mask,
unsigned long *bits)
{
struct ltc2992_state *st = gpiochip_get_data(chip);
unsigned long gpio_ctrl_io = 0;
unsigned long gpio_ctrl = 0;
unsigned int gpio_nr;
int ret;
for_each_set_bit(gpio_nr, mask, LTC2992_GPIO_NR) {
if (gpio_nr < 3)
@ -293,9 +298,14 @@ static void ltc2992_gpio_set_multiple(struct gpio_chip *chip, unsigned long *mas
}
mutex_lock(&st->gpio_mutex);
ltc2992_write_reg(st, LTC2992_GPIO_IO_CTRL, 1, gpio_ctrl_io);
ltc2992_write_reg(st, LTC2992_GPIO_CTRL, 1, gpio_ctrl);
ret = ltc2992_write_reg(st, LTC2992_GPIO_IO_CTRL, 1, gpio_ctrl_io);
if (ret)
goto out;
ret = ltc2992_write_reg(st, LTC2992_GPIO_CTRL, 1, gpio_ctrl);
out:
mutex_unlock(&st->gpio_mutex);
return ret;
}
static int ltc2992_config_gpio(struct ltc2992_state *st)
@ -329,8 +339,8 @@ static int ltc2992_config_gpio(struct ltc2992_state *st)
st->gc.ngpio = ARRAY_SIZE(st->gpio_names);
st->gc.get = ltc2992_gpio_get;
st->gc.get_multiple = ltc2992_gpio_get_multiple;
st->gc.set = ltc2992_gpio_set;
st->gc.set_multiple = ltc2992_gpio_set_multiple;
st->gc.set_rv = ltc2992_gpio_set;
st->gc.set_multiple_rv = ltc2992_gpio_set_multiple;
ret = devm_gpiochip_add_data(&st->client->dev, &st->gc, st);
if (ret)