[U-Boot] [PATCH v3 3/6] arm:exynos4:pinmux: Modify the gpio function for mmc

[Jaehoon Chung <jh80.chung@samsung.com>]

Hi Piotr,

On 08/29/2012 04:56 PM, Piotr Wilczek wrote:
> This patch add pinmux settings for Exynos4 for mmc0 and mmc2
> 
> Signed-off-by: Piotr Wilczek <p.wilczek@samsung.com>
> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
> CC: Minkyu Kang <mk7.kang@samsung.com>
> ---
> Changes for v2:
> - mmc initialisation code moved to pinmux instead of creating a new common code file
> Changes for v3:
> - no changes
> 
>  arch/arm/cpu/armv7/exynos/pinmux.c        |   56 +++++++++++++++++++++++++++++
>  arch/arm/include/asm/arch-exynos/periph.h |    1 +
>  2 files changed, 57 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/arm/cpu/armv7/exynos/pinmux.c b/arch/arm/cpu/armv7/exynos/pinmux.c
> index d2b7d2c..84ee05c 100644
> --- a/arch/arm/cpu/armv7/exynos/pinmux.c
> +++ b/arch/arm/cpu/armv7/exynos/pinmux.c
> @@ -209,10 +209,66 @@ static int exynos5_pinmux_config(int peripheral, int flags)
>  	return 0;
>  }
>  
> +static int exynos4_mmc_config(int peripheral, int flags)
> +{
> +	struct exynos4_gpio_part2 *gpio2 =
> +		(struct exynos4_gpio_part2 *)samsung_get_base_gpio_part2();
> +	struct s5p_gpio_bank *bank, *bank_ext;
bank, bank_ext is uninitialized.

> +	int i;
> +
> +	switch (peripheral) {
> +	case PERIPH_ID_SDMMC0:
> +		bank = &gpio2->k0;
> +		bank_ext = &gpio2->k1;
> +		break;
> +	case PERIPH_ID_SDMMC2:
> +		bank = &gpio2->k2;
> +		bank_ext = &gpio2->k3;
> +		break;
> +	}
> +	for (i = 0; i < 7; i++) {
> +		if (i == 2)
> +			continue;
> +		s5p_gpio_cfg_pin(bank, i,  GPIO_FUNC(0x2));
> +		s5p_gpio_set_pull(bank, i, GPIO_PULL_NONE);
> +		s5p_gpio_set_drv(bank, i, GPIO_DRV_4X);
> +	}
> +	if (flags & PINMUX_FLAG_8BIT_MODE) {
> +		for (i = 3; i < 7; i++) {
> +			s5p_gpio_cfg_pin(bank_ext, i,  GPIO_FUNC(0x3));
> +			s5p_gpio_set_pull(bank_ext, i, GPIO_PULL_NONE);
> +			s5p_gpio_set_drv(bank_ext, i, GPIO_DRV_4X);
> +		}
> +	}
> +
> +	return 0;
> +}
> +
> +static int exynos4_pinmux_config(int peripheral, int flags)
> +{
> +	switch (peripheral) {
> +	case PERIPH_ID_SDMMC0:
> +	case PERIPH_ID_SDMMC2:
> +		return exynos4_mmc_config(peripheral, flags);
> +	case PERIPH_ID_SDMMC1:
> +	case PERIPH_ID_SDMMC3:
> +	case PERIPH_ID_SDMMC4:
> +		printf("SDMMC device %d not implemented\n", peripheral);
> +		return -1;
> +	default:
> +		debug("%s: invalid peripheral %d", __func__, peripheral);
> +		return -1;
> +	}
> +
> +	return 0;
> +}
> +
>  int exynos_pinmux_config(int peripheral, int flags)
>  {
>  	if (cpu_is_exynos5())
>  		return exynos5_pinmux_config(peripheral, flags);
> +	else if (cpu_is_exynos4())
> +		return exynos4_pinmux_config(peripheral, flags);
>  	else {
>  		debug("pinmux functionality not supported\n");
>  		return -1;
> diff --git a/arch/arm/include/asm/arch-exynos/periph.h b/arch/arm/include/asm/arch-exynos/periph.h
> index 5db25aa..4e1da82 100644
> --- a/arch/arm/include/asm/arch-exynos/periph.h
> +++ b/arch/arm/include/asm/arch-exynos/periph.h
> @@ -34,6 +34,7 @@ enum periph_id {
>  	PERIPH_ID_SDMMC1,
>  	PERIPH_ID_SDMMC2,
>  	PERIPH_ID_SDMMC3,
> +	PERIPH_ID_SDMMC4,
>  	PERIPH_ID_SROMC,
>  	PERIPH_ID_UART0,
>  	PERIPH_ID_UART1,
>