diff options
| author | Clément Le Goffic <clement.legoffic@foss.st.com> | 2025-06-13 13:14:12 +0300 |
|---|---|---|
| committer | Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2025-06-19 10:05:33 +0300 |
| commit | deefc7083414de81aad102b60f0390f600d7eb79 (patch) | |
| tree | 3ab62240d9323708853465807e1fc727879ee13c /drivers/gpio/gpio-mmio.c | |
| parent | 19272b37aa4f83ca52bdf9c16d5d81bdd1354494 (diff) | |
| download | linux-deefc7083414de81aad102b60f0390f600d7eb79.tar.xz | |
gpio: mmio: add BGPIOF_NO_INPUT flag for GPO gpiochip
When using bgpio_init with a gpiochip acting as a GPO (output only), the
gpiochip ops `direction_input` was set to `bgpio_simple_dir_in` by
default but we have no input ability.
Adding this flag allows to set a valid ops for the `direction_output`
ops without setting a valid ops for `direction_input` by default.
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Clément Le Goffic <clement.legoffic@foss.st.com>
Link: https://lore.kernel.org/r/20250613-hdp-upstream-v5-1-6fd6f0dc527c@foss.st.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Diffstat (limited to 'drivers/gpio/gpio-mmio.c')
| -rw-r--r-- | drivers/gpio/gpio-mmio.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/gpio/gpio-mmio.c b/drivers/gpio/gpio-mmio.c index 4841e4ebe7a6..09b9e1275e7e 100644 --- a/drivers/gpio/gpio-mmio.c +++ b/drivers/gpio/gpio-mmio.c @@ -335,6 +335,11 @@ static int bgpio_dir_return(struct gpio_chip *gc, unsigned int gpio, bool dir_ou return pinctrl_gpio_direction_input(gc, gpio); } +static int bgpio_dir_in_err(struct gpio_chip *gc, unsigned int gpio) +{ + return -EINVAL; +} + static int bgpio_simple_dir_in(struct gpio_chip *gc, unsigned int gpio) { return bgpio_dir_return(gc, gpio, false); @@ -566,7 +571,11 @@ static int bgpio_setup_direction(struct gpio_chip *gc, gc->direction_output = bgpio_dir_out_err; else gc->direction_output = bgpio_simple_dir_out; - gc->direction_input = bgpio_simple_dir_in; + + if (flags & BGPIOF_NO_INPUT) + gc->direction_input = bgpio_dir_in_err; + else + gc->direction_input = bgpio_simple_dir_in; } return 0; |