Messages in this thread Patch in this message | | | From | Andy Shevchenko <> | Subject | [PATCH v3 02/13] gpiolib: Introduce gpiochip_node_count() helper | Date | Wed, 30 Mar 2022 17:50:19 +0300 |
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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> --- include/linux/gpio/driver.h | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h index 2142ffc7338c..e38565a5056c 100644 --- a/include/linux/gpio/driver.h +++ b/include/linux/gpio/driver.h @@ -752,4 +752,15 @@ 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 */ -- 2.35.1
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