[PATCH v2 03/23] sunxi: pinctrl: Implement get_pin_muxing function

[Andre Przywara]

On Thu, 17 Mar 2022 22:54:00 -0500
Samuel Holland <samuel at sholland.org> wrote:

> The pinmux command uses this function to display pinmux status.
> 
> Since the driver cannot map pin numbers to a list of supported
> functions, only functions which are common across all pins can be
> reported by name.
> 
> Signed-off-by: Samuel Holland <samuel at sholland.org>

I can surely live with that drawback:

Reviewed-by: Andre Przywara <andre.przywara at arm.com>

Cheers,
Andre

> ---
> 
> (no changes since v1)
> 
>  drivers/pinctrl/sunxi/pinctrl-sunxi.c | 27 +++++++++++++++++++++++++++
>  1 file changed, 27 insertions(+)
> 
> diff --git a/drivers/pinctrl/sunxi/pinctrl-sunxi.c b/drivers/pinctrl/sunxi/pinctrl-sunxi.c
> index 6ea8245c8e..4e453cec54 100644
> --- a/drivers/pinctrl/sunxi/pinctrl-sunxi.c
> +++ b/drivers/pinctrl/sunxi/pinctrl-sunxi.c
> @@ -82,6 +82,32 @@ static int sunxi_pinctrl_pinmux_set(struct udevice *dev, uint pin_selector,
>  	return 0;
>  }
>  
> +static int sunxi_pinctrl_get_pin_muxing(struct udevice *dev, uint pin_selector,
> +					char *buf, int size)
> +{
> +	struct sunxi_pinctrl_plat *plat = dev_get_plat(dev);
> +	int bank = pin_selector / SUNXI_GPIOS_PER_BANK;
> +	int pin	 = pin_selector % SUNXI_GPIOS_PER_BANK;
> +	int mux  = sunxi_gpio_get_cfgbank(plat->base + bank, pin);
> +
> +	switch (mux) {
> +	case SUNXI_GPIO_INPUT:
> +		strlcpy(buf, "gpio input", size);
> +		break;
> +	case SUNXI_GPIO_OUTPUT:
> +		strlcpy(buf, "gpio output", size);
> +		break;
> +	case SUNXI_GPIO_DISABLE:
> +		strlcpy(buf, "disabled", size);
> +		break;
> +	default:
> +		snprintf(buf, size, "function %d", mux);
> +		break;
> +	}
> +
> +	return 0;
> +}
> +
>  static const struct pinctrl_ops sunxi_pinctrl_ops = {
>  	.get_pins_count		= sunxi_pinctrl_get_pins_count,
>  	.get_pin_name		= sunxi_pinctrl_get_pin_name,
> @@ -89,6 +115,7 @@ static const struct pinctrl_ops sunxi_pinctrl_ops = {
>  	.get_function_name	= sunxi_pinctrl_get_function_name,
>  	.pinmux_set		= sunxi_pinctrl_pinmux_set,
>  	.set_state		= pinctrl_generic_set_state,
> +	.get_pin_muxing		= sunxi_pinctrl_get_pin_muxing,
>  };
>  
>  static int sunxi_pinctrl_bind(struct udevice *dev)