[PATCH 11/11] pinctrl: scmi: select the GPIO function on GPIO requests

[Clément Le Goffic]

Hi Andy,

On 11/3/26 12:41 PM, Andy Shevchenko wrote:
> On Fri, Oct 30, 2026 at 04:58:42PM +0100, Clément Le Goffic wrote:
>> On a GPIO request, select the GPIO function of the pin, on the pin for a
>> pin-only function or on its single-pin group. Without a GPIO function the
>> mux is left as it is.
> 
> ...
> 
>> +static int pinctrl_scmi_gpio_mux_set(struct scmi_pinctrl *pmx, unsigned int pin)
>> +{
>> +	const unsigned int *elems, *pins;
>> +	unsigned int nr_elems, nr_pins, i;
>> +	bool pin_only, gpio;
>> +	int nr_functions, func, ret;
>> +
>> +	nr_functions = pinctrl_ops->count_get(pmx->ph, FUNCTION_TYPE);
> 
> Is nr_functions signed for a purpose? Can it hold an error code?

No indeed, will fix in v2.

> 
>> +	for (func = 0; func < nr_functions; func++) {
> 
> 	for (int func = 0; func < nr_functions; func++) {
> 
>> +		ret = pinctrl_ops->function_flags_get(pmx->ph, func, &pin_only,
>> +						      &gpio);
>> +		if (ret)
>> +			return ret;
>> +
>> +		if (!gpio)
>> +			continue;
>> +
>> +		ret = pinctrl_ops->function_groups_get(pmx->ph, func, &nr_elems,
>> +						       &elems);
>> +		if (ret)
>> +			return ret;
> 
>> +		for (i = 0; i < nr_elems; i++) {
> 
> 		for (unsigned int i = 0; i < nr_elems; i++) {

Ack

> 
>> +			if (pin_only) {
>> +				if (elems[i] != pin)
>> +					continue;
>> +
>> +				return pinctrl_ops->pin_mux_set(pmx->ph, func,
>> +								pin);
>> +			}
>> +
>> +			ret = pinctrl_ops->group_pins_get(pmx->ph, elems[i],
>> +							  &pins, &nr_pins);
>> +			if (ret)
>> +				return ret;
>> +
>> +			if (nr_pins == 1 && pins[0] == pin)
>> +				return pinctrl_ops->mux_set(pmx->ph, func,
>> +							    elems[i]);
>> +		}
>> +	}
>> +
>> +	return 0;
>> +}
> 

Best regards,
Clément