[U-Boot] [RFC PATCH 1/3] at91: add new gpio pin macros

[Bo Shen <voice.shen@atmel.com>]

Hi Andreas,

On 10/29/2013 20:53, Andreas Bie?mann wrote:
> Signed-off-by: Andreas Bie?mann <andreas.devel@googlemail.com>
> ---
>   arch/arm/include/asm/arch-at91/gpio.h |   34 ++++++++++++++++++++++++++++-----
>   1 file changed, 29 insertions(+), 5 deletions(-)
>
> diff --git a/arch/arm/include/asm/arch-at91/gpio.h b/arch/arm/include/asm/arch-at91/gpio.h
> index 0700427..f9ca11e 100644
> --- a/arch/arm/include/asm/arch-at91/gpio.h
> +++ b/arch/arm/include/asm/arch-at91/gpio.h
> @@ -227,8 +227,32 @@ static inline unsigned pin_to_mask(unsigned pin)
>   	at91_set_pio_value((x - PIN_BASE) / 32,(x % 32), y)
>   #define at91_get_gpio_value(x) \
>   	at91_get_pio_value((x - PIN_BASE) / 32,(x % 32))
> -#else
> -#define at91_set_gpio_value(x, y)	at91_set_pio_value(x, y)
> -#define at91_get_gpio_value(x)		at91_get_pio_value(x)
> -#endif
> -#endif
> +#else /* CONFIG_ATMEL_LEGACY */
> +
> +#define GPIO_PIOA_BASE  (0)
> +#define GPIO_PIOB_BASE  (GPIO_PIOA_BASE + 32)
> +#define GPIO_PIOC_BASE  (GPIO_PIOB_BASE + 32)
> +#define GPIO_PIOD_BASE  (GPIO_PIOC_BASE + 32)
> +#define GPIO_PIOE_BASE  (GPIO_PIOD_BASE + 32)
> +#define GPIO_PIN_PA(x)  (GPIO_PIOA_BASE + (x))
> +#define GPIO_PIN_PB(x)  (GPIO_PIOB_BASE + (x))
> +#define GPIO_PIN_PC(x)  (GPIO_PIOC_BASE + (x))
> +#define GPIO_PIN_PD(x)  (GPIO_PIOD_BASE + (x))
> +#define GPIO_PIN_PE(x)  (GPIO_PIOE_BASE + (x))
> +
> +#define at91_gpio_to_port(gpio) (gpio / 32)
> +#define at91_gpio_to_pin(gpio)  (gpio % 32)

This is an exception for at91sam9x5 and at91sam9n12 SoCs, which PIOB and 
PIOD are not 32 pins. PIOB only has 19 pins, while PIOD only has 22 pins.

> +/* remove after transition to generic gpio API of all users */
> +#define at91_set_gpio_value(x, y) \
> +	at91_set_pio_value(at91_gpio_to_port(x), at91_gpio_to_pin(x), y)
> +#define at91_get_gpio_value(x) \
> +	at91_get_pio_value(at91_gpio_to_port(x), at91_gpio_to_pin(x))
> +
> +#define at91_set_gpio_input(x, y) \
> +	at91_set_pio_input(at91_gpio_to_port(x), at91_gpio_to_pin(x), y)
> +#define at91_set_gpio_output(x, y) \
> +	at91_set_pio_output(at91_gpio_to_port(x), at91_gpio_to_pin(x), y)
> +
> +#endif /* CONFIG_ATMEL_LEGACY */
> +#endif /* __ASM_ARCH_AT91_GPIO_H */
>

Best Regards,
Bo Shen