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gpios: palmas: add .get_direction() op

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commit db4a79713e upstream.

Accessing debug/gpio is quite noisy without a get_direction()
implementation. To calm that down add an implementation.

Fixes: 3d50a27852 ("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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andreas Kemnade
2026-07-24 16:03:42 +02:00
committed by Greg Kroah-Hartman
parent 0ea41686d7
commit f916210f9d
1 changed files with 19 additions and 0 deletions
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drivers/gpio/gpio-palmas.c
+19
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@@ -117,6 +117,24 @@ 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;