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authorMichał Mirosław <mirq-linux@rere.qmqm.pl>2019-12-11 05:40:55 +0300
committerUlf Hansson <ulf.hansson@linaro.org>2019-12-18 15:36:02 +0300
commitd3a5bcb4a17f1ad072484bb92c42519ff3aba6e1 (patch)
tree3bbc5b18ec08c1bddbe71bfb63e5d4183ee7a321 /include/linux/gpio
parent2c3039c14380bc7b857f7afaaed68a0b8176c3db (diff)
downloadlinux-d3a5bcb4a17f1ad072484bb92c42519ff3aba6e1.tar.xz
gpio: add gpiod_toggle_active_low()
Add possibility to toggle active-low flag of a gpio descriptor. This is useful for compatibility code, where defaults are inverted vs DT gpio flags or the active-low flag is taken from elsewhere. Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl> Link: https://lore.kernel.org/r/7ce0338e01ad17fa5a227176813941b41a7c35c1.1576031637.git.mirq-linux@rere.qmqm.pl Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'include/linux/gpio')
-rw-r--r--include/linux/gpio/consumer.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/gpio/consumer.h b/include/linux/gpio/consumer.h
index 5215fdba6b9a..bf2d017dd7b7 100644
--- a/include/linux/gpio/consumer.h
+++ b/include/linux/gpio/consumer.h
@@ -158,6 +158,7 @@ int gpiod_set_raw_array_value_cansleep(unsigned int array_size,
int gpiod_set_debounce(struct gpio_desc *desc, unsigned debounce);
int gpiod_set_transitory(struct gpio_desc *desc, bool transitory);
+void gpiod_toggle_active_low(struct gpio_desc *desc);
int gpiod_is_active_low(const struct gpio_desc *desc);
int gpiod_cansleep(const struct gpio_desc *desc);
@@ -483,6 +484,12 @@ static inline int gpiod_set_transitory(struct gpio_desc *desc, bool transitory)
return -ENOSYS;
}
+static inline void gpiod_toggle_active_low(struct gpio_desc *desc)
+{
+ /* GPIO can never have been requested */
+ WARN_ON(desc);
+}
+
static inline int gpiod_is_active_low(const struct gpio_desc *desc)
{
/* GPIO can never have been requested */