[PATCH v1 2/5] pinctrl: stm32: Replace custom code by gpiochip_count() call

[Fabien DESSENNE]

Hi Andy,


On 25/03/2022 21:03, Andy Shevchenko wrote:
> Since we have generic function to count GPIO controller nodes
> under given device, there is no need to open code it. Replace
> custom code by gpiochip_count() call.
> 
> Signed-off-by: Andy Shevchenko <andriy.shevchenko at linux.intel.com>
> ---
>   drivers/pinctrl/stm32/pinctrl-stm32.c | 8 +++-----
>   1 file changed, 3 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/pinctrl/stm32/pinctrl-stm32.c b/drivers/pinctrl/stm32/pinctrl-stm32.c
> index 9ed764731570..d4bbeec82c1f 100644
> --- 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)

Here we look for "available" child, while the new generic helper 
gpiochip_count() looks for any child, available or not.
Would it be possible to hav gpiochip_count() looking for available child 
as well?
It looks like there is '_available_' version of 
'device_for_each_child_node', maybe this shall be added too.


> -		if (of_property_read_bool(child, "gpio-controller"))
> -			banks++;
> -
> +	banks = gpiochip_count(dev);
>   	if (!banks) {
>   		dev_err(dev, "at least one GPIO bank is required\n");
>   		return -EINVAL;

Fabien