On Mon, Feb 27, 2017 at 12:26:40AM +0000, Andre Przywara wrote:
> Instead of hard-coding GPIO pins used for a certain peripheral, we
> should just use the pinctrl information from the DT.
> The sun8i-emac driver has some simple implementation of that, so
> let's just generalize this and move the code into a more common
> location.
> On the way we add support for the new, generic pinctrl binding now
> used by all Allwinner SoCs.
>
> Signed-off-by: Andre Przywara <andre.przyw...@arm.com>
> ---
> arch/arm/include/asm/arch-sunxi/gpio.h | 4 ++
> arch/arm/mach-sunxi/pinmux.c | 77
> ++++++++++++++++++++++++++++++++++
> 2 files changed, 81 insertions(+)
>
> diff --git a/arch/arm/include/asm/arch-sunxi/gpio.h
> b/arch/arm/include/asm/arch-sunxi/gpio.h
> index 85a4ec3..ba8c661 100644
> --- a/arch/arm/include/asm/arch-sunxi/gpio.h
> +++ b/arch/arm/include/asm/arch-sunxi/gpio.h
> @@ -239,4 +239,8 @@ int axp_gpio_init(void);
> static inline int axp_gpio_init(void) { return 0; }
> #endif
>
> +int sunxi_gpio_parse_pin_name(const char *pin_name);
> +int sunxi_gpio_setup_dt_pins(const void * volatile fdt_blob, int node,
> + const char * mux_name, int mux_sel);
> +
> #endif /* _SUNXI_GPIO_H */
> diff --git a/arch/arm/mach-sunxi/pinmux.c b/arch/arm/mach-sunxi/pinmux.c
> index b026f78..f1e1e8f 100644
> --- a/arch/arm/mach-sunxi/pinmux.c
> +++ b/arch/arm/mach-sunxi/pinmux.c
> @@ -9,6 +9,9 @@
> #include <common.h>
> #include <asm/io.h>
> #include <asm/arch/gpio.h>
> +#include <fdtdec.h>
> +#include <fdt_support.h>
> +#include <dt-bindings/pinctrl/sun4i-a10.h>
>
> void sunxi_gpio_set_cfgbank(struct sunxi_gpio *pio, int bank_offset, u32 val)
> {
> @@ -69,3 +72,77 @@ int sunxi_gpio_set_pull(u32 pin, u32 val)
>
> return 0;
> }
> +
> +int sunxi_gpio_parse_pin_name(const char *pin_name)
> +{
> + int pin;
> +
> + if (pin_name[0] != 'P')
> + return -1;
> +
> + if (pin_name[1] < 'A' || pin_name[1] > 'Z')
> + return -1;
> +
> + pin = (pin_name[1] - 'A') << 5;
> + pin += simple_strtol(&pin_name[2], NULL, 10);
> +
> + return pin;
> +}That function already exists, sunxi_name_to_gpio. Maxime -- Maxime Ripard, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com
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