diff options
| author | Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2024-01-29 10:11:41 +0100 |
|---|---|---|
| committer | Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2024-02-12 10:50:30 +0100 |
| commit | d23dc4a9a88f16d0327e7b4bb03e6f43c1a1b166 (patch) | |
| tree | 050643d3a7698c2f2cd0c4b769237fbed0952dcd /drivers/gpio/gpiolib.h | |
| parent | 0857c39bfd09183792c680858b4416498ee1d1ca (diff) | |
gpio: provide and use gpiod_get_label()
We will soon serialize access to the descriptor label using SRCU. The
write-side of the protection will require calling synchronize_srcu()
which must not be called from atomic context. We have two irq helpers:
gpiochip_lock_as_irq() and gpiochip_unlock_as_irq() that set the label
if the GPIO is not requested but is being used as interrupt. They are
called with a spinlock held from the interrupt subsystem.
They must not do it if we are to use SRCU so instead let's move the
special corner case to a dedicated getter.
First: let's implement and use the getter where it's applicable.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Diffstat (limited to 'drivers/gpio/gpiolib.h')
| -rw-r--r-- | drivers/gpio/gpiolib.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpio/gpiolib.h b/drivers/gpio/gpiolib.h index c3ae5bfa3f2e..1058f326fe2b 100644 --- a/drivers/gpio/gpiolib.h +++ b/drivers/gpio/gpiolib.h @@ -208,6 +208,7 @@ int gpio_set_debounce_timeout(struct gpio_desc *desc, unsigned int debounce); int gpiod_hog(struct gpio_desc *desc, const char *name, unsigned long lflags, enum gpiod_flags dflags); int gpiochip_get_ngpios(struct gpio_chip *gc, struct device *dev); +const char *gpiod_get_label(struct gpio_desc *desc); /* * Return the GPIO number of the passed descriptor relative to its chip |