pinctrl: stm32: Replace custom code by gpiochip_node_count() call

Since we have generic function to count GPIO controller nodes
under a given device, there is no need to open code it. Replace
custom code by gpiochip_node_count() call.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Fabien Dessenne <fabien.dessenne@foss.st.com>

diff --git a/drivers/pinctrl/stm32/pinctrl-stm32.c b/drivers/pinctrl/stm32/pinctrl-stm32.c
index 9ed7647..91b9a64 100644 (file)
--- a/drivers/pinctrl/stm32/pinctrl-stm32.c
+++ b/drivers/pinctrl/stm32/pinctrl-stm32.c
@@ -1423,7 +1423,8 @@ int stm32_pctl_probe(struct platform_device *pdev)
        struct device *dev = &pdev->dev;
        struct stm32_pinctrl *pctl;
        struct pinctrl_pin_desc *pins;
-       int i, ret, hwlock_id, banks = 0;
+       int i, ret, hwlock_id;
+       unsigned int banks;
 
        if (!np)
                return -EINVAL;
@@ -1513,10 +1514,7 @@ int stm32_pctl_probe(struct platform_device *pdev)
                return PTR_ERR(pctl->pctl_dev);
        }
 
-       for_each_available_child_of_node(np, child)
-               if (of_property_read_bool(child, "gpio-controller"))
-                       banks++;
-
+       banks = gpiochip_node_count(dev);
        if (!banks) {
                dev_err(dev, "at least one GPIO bank is required\n");
                return -EINVAL;