Re: [PATCH v4 05/13] pinctrl: samsung: Switch to use for_each_gpiochip_node() helper

[Krzysztof Kozlowski]

On 08/04/2022 17:39, Andy Shevchenko wrote:
> On Fri, Apr 08, 2022 at 05:22:21PM +0200, Krzysztof Kozlowski wrote:
>> On 01/04/2022 12:35, Andy Shevchenko wrote:
>>> Switch the code to use for_each_gpiochip_node() helper.
> 
> (...)
> 
>>>  /*
>>>   * Iterate over all driver pin banks to find one matching the name of node,
>>>   * skipping optional "-gpio" node suffix. When found, assign node to the bank.
>>>   */
>>> -static void samsung_banks_of_node_get(struct device *dev,
>>> -				      struct samsung_pinctrl_drv_data *d,
>>> -				      struct device_node *node)
>>> +static void samsung_banks_node_get(struct device *dev, struct samsung_pinctrl_drv_data *d)
>>
>> This is worth simplification anyway, so please split it to separate patch.
> 
> Not sure what to do and why it worth an additional churn.

Makes this change smaller so it's easier to review.

> 
>>>  {
>>>  	const char *suffix = "-gpio-bank";
>>>  	struct samsung_pin_bank *bank;
>>> -	struct device_node *child;
>>> +	struct fwnode_handle *child;
>>>  	/* Pin bank names are up to 4 characters */
>>>  	char node_name[20];
>>>  	unsigned int i;
>>> @@ -1038,17 +1037,17 @@ static void samsung_banks_of_node_get(struct device *dev,
>>>  			continue;
>>>  		}
>>>  
>>> -		for_each_child_of_node(node, child) {
>>> -			if (!of_find_property(child, "gpio-controller", NULL))
>>> -				continue;
>>
>> This does not look equivalent. There are nodes without this property.
> 
> Not sure I understand why not. The macro checks for the property and
> iterates over nodes that have this property.
> 
> Can you elaborate, please?

Eh, my bad, it is equivalent.

> 
>>> -			if (of_node_name_eq(child, node_name))
>>> +		for_each_gpiochip_node(dev, child) {
>>> +			struct device_node *np = to_of_node(child);
>>> +
>>> +			if (of_node_name_eq(np, node_name))
>>>  				break;
>>> -			else if (of_node_name_eq(child, bank->name))
>>> +			if (of_node_name_eq(np, bank->name))
>>>  				break;
>>>  		}
>>
>> This patch has to wait till someone provides you a tested-by. I might do
>> it around next week.
> 
> Fine with me, I will drop it from my repo for now.


Best regards,
Krzysztof