[U-Boot] [PATCH 4/4] SMDK5250: Initialise and enable dwmmc channels

Jaehoon Chung
2012-12-06T04:08:50Z

On 12/05/2012 10:31 PM, Amar wrote:
> This patch initialises and enables dwmmc channels 0 and 2 for SMDK5250.
> It also initialises the pinmux for the same.
>
> Signed-off-by: Amarendra Reddy <amarendra.xt@samsung.com>
> ---
> board/samsung/smdk5250/smdk5250.c | 22 +++++++++++++++++++++-
> include/configs/smdk5250.h | 4 ++--
> 2 files changed, 23 insertions(+), 3 deletions(-)
>
> diff --git a/board/samsung/smdk5250/smdk5250.c b/board/samsung/smdk5250/smdk5250.c
> index 4c50342..9503510 100644
> --- a/board/samsung/smdk5250/smdk5250.c
> +++ b/board/samsung/smdk5250/smdk5250.c
> @@ -26,6 +26,7 @@
> #include <netdev.h>
> #include <spi.h>
> #include <asm/arch/cpu.h>
> +#include <asm/arch/dwmmc.h>
> #include <asm/arch/gpio.h>
> #include <asm/arch/mmc.h>
> #include <asm/arch/pinmux.h>
> @@ -139,13 +140,32 @@ int board_mmc_init(bd_t *bis)
> {
> int err;
>
> + err = exynos_pinmux_config(PERIPH_ID_SDMMC2, PINMUX_FLAG_NONE);
> + if (err) {
> + debug("SDMMC2 not configured\n");
> + return err;
> + }
If return error, we didn't need to initialize the MMC0?
And why do you initialize the MMC2 before initialized MMC0?
I didn't test the this patch, but i think if you inserted SD-card, it didn't work well.
> +
> + /*SD: dwmmc Channel-2 with 4 bit bus width */
> + err = exynos_dwmmc_init(2, 4);
> + if (err) {
> + debug("dwmmc Channel-2 init failed\n");
> + return err;
> + }
> +
> err = exynos_pinmux_config(PERIPH_ID_SDMMC0, PINMUX_FLAG_8BIT_MODE);
> if (err) {
> debug("SDMMC0 not configured\n");
> return err;
> }
>
> - err = s5p_mmc_init(0, 8);
> + /*eMMC: dwmmc Channel-0 with 8 bit bus width */
> + err = exynos_dwmmc_init(0, 8);
> + if (err) {
> + debug("dwmmc Channel-0 init failed\n");
> + return err;
> + }
> +
> return err;
> }
> #endif
> diff --git a/include/configs/smdk5250.h b/include/configs/smdk5250.h
> index e412da8..7dc2d96 100644
> --- a/include/configs/smdk5250.h
> +++ b/include/configs/smdk5250.h
> @@ -77,8 +77,8 @@
> /* SD/MMC configuration */
> #define CONFIG_GENERIC_MMC
> #define CONFIG_MMC
> -#define CONFIG_SDHCI
> -#define CONFIG_S5P_SDHCI
> +#define CONFIG_DWMMC
> +#define CONFIG_EXYNOS_DWMMC
>
> #define CONFIG_BOARD_EARLY_INIT_F
>
>