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| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2022-04-01 13:35:53 +0300 |
|---|---|---|
| committer | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2022-04-08 15:54:54 +0300 |
| commit | 0b19dde90ad004592792a928c75e80612be3e2e8 (patch) | |
| tree | 96bdd2922954ae12d22837b86f8fdefbff19891d | |
| parent | 85ebb1a6bd62147ebcfa70500d513331a8daf9e0 (diff) | |
| download | linux-stable-0b19dde90ad004592792a928c75e80612be3e2e8.tar.gz linux-stable-0b19dde90ad004592792a928c75e80612be3e2e8.tar.bz2 linux-stable-0b19dde90ad004592792a928c75e80612be3e2e8.zip | |
gpiolib: Introduce gpiochip_node_count() helper
The gpiochip_node_count() helper iterates over the device child nodes that
have the "gpio-controller" property set. It returns the number of such nodes
under a given device.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Bartosz Golaszewski <brgl@bgdev.pl>
| -rw-r--r-- | include/linux/gpio/driver.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h index bfc91f122d5f..12de0b22b4ef 100644 --- a/include/linux/gpio/driver.h +++ b/include/linux/gpio/driver.h @@ -755,4 +755,15 @@ static inline void gpiochip_unlock_as_irq(struct gpio_chip *gc, device_for_each_child_node(dev, child) \ if (!fwnode_property_present(child, "gpio-controller")) {} else +static inline unsigned int gpiochip_node_count(struct device *dev) +{ + struct fwnode_handle *child; + unsigned int count = 0; + + for_each_gpiochip_node(dev, child) + count++; + + return count; +} + #endif /* __LINUX_GPIO_DRIVER_H */ |