From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Fri, 1 Apr 2022 10:35:53 +0000 (+0300)
Subject: gpiolib: Introduce gpiochip_node_count() helper
X-Git-Tag: v6.1-rc5~1223^2~31^2~13
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0b19dde90ad004592792a928c75e80612be3e2e8;p=platform%2Fkernel%2Flinux-starfive.git

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>
---

diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
index bfc91f1..12de0b2 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 */