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gpiolib: of: support bias pull disable

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On top of looking at PULL_UP and PULL_DOWN flags, also look at
PULL_DISABLE and set the appropriate GPIO flag. The GPIO core will then
pass down this to controllers that support it.

Signed-off-by: Nuno Sá <nuno.sa@analog.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
This commit is contained in:
Nuno Sá 2022-07-13 15:14:19 +02:00 committed by Bartosz Golaszewski
parent c269df8c5a
commit 31bea23119
2 changed files with 8 additions and 0 deletions
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7
drivers/gpio/gpiolib-of.c
View File

@ -354,6 +354,9 @@ struct gpio_desc *gpiod_get_from_of_node(const struct device_node *node,
if (flags & OF_GPIO_PULL_DOWN)
lflags |= GPIO_PULL_DOWN;
if (flags & OF_GPIO_PULL_DISABLE)
lflags |= GPIO_PULL_DISABLE;
ret = gpiod_configure_flags(desc, propname, lflags, dflags);
if (ret < 0) {
gpiod_put(desc);
@ -556,6 +559,8 @@ struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id,
*flags |= GPIO_PULL_UP;
if (of_flags & OF_GPIO_PULL_DOWN)
*flags |= GPIO_PULL_DOWN;
if (of_flags & OF_GPIO_PULL_DISABLE)
*flags |= GPIO_PULL_DISABLE;
return desc;
}
@ -621,6 +626,8 @@ static struct gpio_desc *of_parse_own_gpio(struct device_node *np,
*lflags |= GPIO_PULL_UP;
if (xlate_flags & OF_GPIO_PULL_DOWN)
*lflags |= GPIO_PULL_DOWN;
if (xlate_flags & OF_GPIO_PULL_DISABLE)
*lflags |= GPIO_PULL_DISABLE;
if (of_property_read_bool(np, "input"))
*dflags |= GPIOD_IN;

1
include/linux/of_gpio.h
View File

@ -29,6 +29,7 @@ enum of_gpio_flags {
OF_GPIO_TRANSITORY = 0x8,
OF_GPIO_PULL_UP = 0x10,
OF_GPIO_PULL_DOWN = 0x20,
OF_GPIO_PULL_DISABLE = 0x40,
};
#ifdef CONFIG_OF_GPIO