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| author | Andreas Kemnade <andreas@kemnade.info> | 2026-07-04 10:40:54 +0200 |
|---|---|---|
| committer | Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com> | 2026-07-06 12:01:07 +0200 |
| commit | db4a79713ed8e252d5e4edf6eaaa80948b6855a2 (patch) | |
| tree | 9c82d885331e4446ca9438971be4faad344b56e1 | |
| parent | 8cdeaa50eae8dad34885515f62559ee83e7e8dda (diff) | |
| download | linux-next-db4a79713ed8e252d5e4edf6eaaa80948b6855a2.tar.gz linux-next-db4a79713ed8e252d5e4edf6eaaa80948b6855a2.zip | |
gpios: palmas: add .get_direction() op
Accessing debug/gpio is quite noisy without a get_direction()
implementation. To calm that down add an implementation.
Fixes: 3d50a2785271 ("gpio: palmas: Add support for Palmas GPIO")
Cc: stable@vger.kernel.org
Reviewed-by: Linus Walleij <linusw@kernel.org>
Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
Link: https://patch.msgid.link/20260704-palmas-getdirection-v2-1-2fd85fee3832@kemnade.info
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
| -rw-r--r-- | drivers/gpio/gpio-palmas.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-palmas.c b/drivers/gpio/gpio-palmas.c index e377f6dd4ccf..e64ee0487718 100644 --- a/drivers/gpio/gpio-palmas.c +++ b/drivers/gpio/gpio-palmas.c @@ -116,6 +116,24 @@ static int palmas_gpio_input(struct gpio_chip *gc, unsigned offset) return ret; } +static int palmas_gpio_get_direction(struct gpio_chip *gc, unsigned int offset) +{ + struct palmas_gpio *pg = gpiochip_get_data(gc); + struct palmas *palmas = pg->palmas; + unsigned int val; + unsigned int reg; + int ret; + int gpio16 = (offset/8); + + offset %= 8; + reg = (gpio16) ? PALMAS_GPIO_DATA_DIR2 : PALMAS_GPIO_DATA_DIR; + ret = palmas_read(palmas, PALMAS_GPIO_BASE, reg, &val); + if (ret) + return ret; + + return (val & BIT(offset)) ? GPIO_LINE_DIRECTION_OUT : GPIO_LINE_DIRECTION_IN; +} + static int palmas_gpio_to_irq(struct gpio_chip *gc, unsigned offset) { struct palmas_gpio *pg = gpiochip_get_data(gc); @@ -165,6 +183,7 @@ static int palmas_gpio_probe(struct platform_device *pdev) palmas_gpio->gpio_chip.can_sleep = true; palmas_gpio->gpio_chip.direction_input = palmas_gpio_input; palmas_gpio->gpio_chip.direction_output = palmas_gpio_output; + palmas_gpio->gpio_chip.get_direction = palmas_gpio_get_direction; palmas_gpio->gpio_chip.to_irq = palmas_gpio_to_irq; palmas_gpio->gpio_chip.set = palmas_gpio_set; palmas_gpio->gpio_chip.get = palmas_gpio_get; |