gpio: pisosr: remove unneeded direction_output() callback

GPIO core can handle input-only chips that don't implement the
direction_output() callback at all. There's no need for the driver to
provide a dummy implementation so drop it.

Link: https://lore.kernel.org/r/20250625081222.12744-1-brgl@bgdev.pl
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

diff --git a/drivers/gpio/gpio-pisosr.c b/drivers/gpio/gpio-pisosr.c
index e3013e778e151ccc543a40ea6bc10c522fa53008..a69b74866a134426b312630aba35eccbf3649608 100644 (file)
--- a/drivers/gpio/gpio-pisosr.c
+++ b/drivers/gpio/gpio-pisosr.c
@@ -67,13 +67,6 @@ static int pisosr_gpio_direction_input(struct gpio_chip *chip,
        return 0;
 }
 
-static int pisosr_gpio_direction_output(struct gpio_chip *chip,
-                                       unsigned offset, int value)
-{
-       /* This device is input only */
-       return -EINVAL;
-}
-
 static int pisosr_gpio_get(struct gpio_chip *chip, unsigned offset)
 {
        struct pisosr_gpio *gpio = gpiochip_get_data(chip);
@@ -108,7 +101,6 @@ static const struct gpio_chip template_chip = {
        .owner                  = THIS_MODULE,
        .get_direction          = pisosr_gpio_get_direction,
        .direction_input        = pisosr_gpio_direction_input,
-       .direction_output       = pisosr_gpio_direction_output,
        .get                    = pisosr_gpio_get,
        .get_multiple           = pisosr_gpio_get_multiple,
        .base                   = -1,