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@xxxxxxxxxxxx>
Reviewed-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>
> ---
> 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 |
