diff options
| author | Asmaa Mnebhi <asmaa@nvidia.com> | 2023-07-11 11:12:48 -0400 |
|---|---|---|
| committer | Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2023-07-18 20:59:25 +0200 |
| commit | 55b2395e4e92adc492c6b30ac109eb78250dcd9d (patch) | |
| tree | e239c02e1fd509d38d7347d8b3939471a8a8ec0d /drivers/gpio/gpiolib.h | |
| parent | 0f93a345aa42c40e2145c3719d878e7daa4eb6ee (diff) | |
gpio: mmio: handle "ngpios" properly in bgpio_init()
bgpio_init() uses "sz" argument to populate ngpio, which is not
accurate. Instead, read the "ngpios" property from the DT and if it
doesn't exist, use the "sz" argument. With this change, drivers no
longer need to overwrite the ngpio variable after calling bgpio_init().
If the "ngpios" property is specified, bgpio_bits is calculated
as the round up value of ngpio. At the moment, the only requirement
specified is that the round up value must be a multiple of 8 but
it should also be a power of 2 because we provide accessors based
on the bank size in bgpio_setup_accessors().
Signed-off-by: Asmaa Mnebhi <asmaa@nvidia.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
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 7c562fbb9fb0..08e8e8274883 100644 --- a/drivers/gpio/gpiolib.h +++ b/drivers/gpio/gpiolib.h @@ -218,6 +218,7 @@ int gpiod_configure_flags(struct gpio_desc *desc, const char *con_id, 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); /* * Return the GPIO number of the passed descriptor relative to its chip |