[PATCH v2 04/11] ARM: at91: Provide at91_mux_pio_pin for use in lowlevel

[Ahmad Fatoum]

On 28.06.22 22:38, Sam Ravnborg wrote:
> Lowlevel init code may wish the ability to configure pins, e.g. for low
> level debug UART. The pinctrl-at91 driver already exports an
> at91_mux_pin function, but that one is only usable after driver
> probe. Instead, provide an at91_mux_pio_pin function, which can be used
> at all times.
> 
> This is similar to the already existing at91_mux_pio3_pin function
> 
> Signed-off-by: Sam Ravnborg <sam at ravnborg.org>

Reviewed-by: Ahmad Fatoum <a.fatoum at pengutronix.de>

> ---
>  arch/arm/mach-at91/include/mach/gpio.h | 25 +++++++++++++++++++++++++
>  1 file changed, 25 insertions(+)
> 
> diff --git a/arch/arm/mach-at91/include/mach/gpio.h b/arch/arm/mach-at91/include/mach/gpio.h
> index ddd6971e3..7f84f41e5 100644
> --- a/arch/arm/mach-at91/include/mach/gpio.h
> +++ b/arch/arm/mach-at91/include/mach/gpio.h
> @@ -151,6 +151,31 @@ static inline int at91_mux_gpio_get(void __iomem *pio, unsigned mask)
>  	return (pdsr & mask) != 0;
>  }
>  
> +static inline void at91_mux_pio_pin(void __iomem *pio, unsigned mask,
> +				    enum at91_mux mux, int gpio_state)
> +{
> +	at91_mux_disable_interrupt(pio, mask);
> +
> +	switch(mux) {
> +	case AT91_MUX_GPIO:
> +		at91_mux_gpio_enable(pio, mask);
> +		break;
> +	case AT91_MUX_PERIPH_A:
> +		at91_mux_set_A_periph(pio, mask);
> +		break;
> +	case AT91_MUX_PERIPH_B:
> +		at91_mux_set_B_periph(pio, mask);
> +		break;
> +	default:
> +		/* ignore everything else */
> +		break;
> +	}
> +	if (mux != AT91_MUX_GPIO)
> +		at91_mux_gpio_disable(pio, mask);
> +
> +	at91_mux_set_pullup(pio, mask, gpio_state & GPIO_PULL_UP);
> +}
> +
>  static inline void at91_mux_pio3_pin(void __iomem *pio, unsigned mask,
>  				     enum at91_mux mux, int gpio_state)
>  {


-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |