Re: [PATCH V2 1/2] pinctrl: bcm2835: Implement bcm2835_pinconf_get

[Andy Shevchenko <andy.shevchenko@gmail.com>]

Sat, Mar 02, 2024 at 10:54:29AM +0100, Stefan Wahren kirjoitti:
> Even the driver already has implemented pin_dbg_show, it could
> be helpful to implement pin_conf_get for a more generic behavior.
> Contrary to the BCM2711, the BCM2835 SOC doesn't allow to read
> the bias config, so the implementation is limited to the basics.

> +	switch (param) {
> +	case PIN_CONFIG_INPUT_ENABLE:
> +		if (fsel != BCM2835_FSEL_GPIO_IN)
> +			return -EINVAL;
> +
> +		*config = pinconf_to_config_packed(param, 1);

> +		return 0;

Either use break here (and in similar situations)...

> +	case PIN_CONFIG_OUTPUT_ENABLE:
> +		if (fsel != BCM2835_FSEL_GPIO_OUT)
> +			return -EINVAL;
> +
> +		*config = pinconf_to_config_packed(param, 1);
> +		return 0;
> +
> +	case PIN_CONFIG_OUTPUT:
> +		if (fsel != BCM2835_FSEL_GPIO_OUT)
> +			return -EINVAL;
> +
> +		val = bcm2835_gpio_get_bit(pc, GPLEV0, pin);
> +		*config = pinconf_to_config_packed(param, val);
> +		return 0;
> +
> +	default:
> +		break;

...and return from here directly.

> +	}
> +
>  	return -ENOTSUPP;

I.o.w. it's better to have a single point of returning a success code.

>  }

-- 
With Best Regards,
Andy Shevchenko