From: Bartosz Golaszewski bartosz.golaszewski@linaro.org
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 --- drivers/staging/greybus/gpio.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-)
diff --git a/drivers/staging/greybus/gpio.c b/drivers/staging/greybus/gpio.c index 16bcf7fc8158..f81c34160f72 100644 --- a/drivers/staging/greybus/gpio.c +++ b/drivers/staging/greybus/gpio.c @@ -185,8 +185,8 @@ static int gb_gpio_get_value_operation(struct gb_gpio_controller *ggc, return 0; }
-static void gb_gpio_set_value_operation(struct gb_gpio_controller *ggc, - u8 which, bool value_high) +static int gb_gpio_set_value_operation(struct gb_gpio_controller *ggc, + u8 which, bool value_high) { struct device *dev = &ggc->gbphy_dev->dev; struct gb_gpio_set_value_request request; @@ -195,7 +195,7 @@ static void gb_gpio_set_value_operation(struct gb_gpio_controller *ggc, if (ggc->lines[which].direction == 1) { dev_warn(dev, "refusing to set value of input gpio %u\n", which); - return; + return -EPERM; }
request.which = which; @@ -204,10 +204,12 @@ static void gb_gpio_set_value_operation(struct gb_gpio_controller *ggc, &request, sizeof(request), NULL, 0); if (ret) { dev_err(dev, "failed to set value of gpio %u\n", which); - return; + return ret; }
ggc->lines[which].value = request.value; + + return 0; }
static int gb_gpio_set_debounce_operation(struct gb_gpio_controller *ggc, @@ -457,11 +459,11 @@ static int gb_gpio_get(struct gpio_chip *chip, unsigned int offset) return ggc->lines[which].value; }
-static void gb_gpio_set(struct gpio_chip *chip, unsigned int offset, int value) +static int gb_gpio_set(struct gpio_chip *chip, unsigned int offset, int value) { struct gb_gpio_controller *ggc = gpiochip_get_data(chip);
- gb_gpio_set_value_operation(ggc, (u8)offset, !!value); + return gb_gpio_set_value_operation(ggc, (u8)offset, !!value); }
static int gb_gpio_set_config(struct gpio_chip *chip, unsigned int offset, @@ -555,7 +557,7 @@ static int gb_gpio_probe(struct gbphy_device *gbphy_dev, gpio->direction_input = gb_gpio_direction_input; gpio->direction_output = gb_gpio_direction_output; gpio->get = gb_gpio_get; - gpio->set = gb_gpio_set; + gpio->set_rv = gb_gpio_set; gpio->set_config = gb_gpio_set_config; gpio->base = -1; /* Allocate base dynamically */ gpio->ngpio = ggc->line_max + 1;
--- base-commit: 0af2f6be1b4281385b618cb86ad946eded089ac8 change-id: 20250331-gpiochip-set-rv-greybus-cd2365755186
Best regards,