[U-Boot] [PATCH v3 03/11] board:samsung: check the boot device and init the right mmc driver.

[Przemyslaw Marczak]

hello Jaehoon,

On 06/27/2014 11:45 AM, Jaehoon Chung wrote:
> On 06/27/2014 06:40 PM, Minkyu Kang wrote:
>> Dear Przemyslaw Marczak,
>>
>> On 26/06/14 23:15, Przemyslaw Marczak wrote:
>>> It is possible to boot device using a micro SD or eMMC slots.
>>> In this situation, boot device should be registered as a block
>>> device 0 in the MMC framework, because CONFIG_SYS_MMC_ENV_DEV
>>> is usually set to "0" in the most config cases.
>>>
>>> Signed-off-by: Przemyslaw Marczak <p.marczak at samsung.com>
>>> ---
>>> Changes V3:
>>> - separate two changes into two commits
>>> ---
>>>   board/samsung/common/board.c | 24 +++++++++++++++++-------
>>>   1 file changed, 17 insertions(+), 7 deletions(-)
>>>
>>> diff --git a/board/samsung/common/board.c b/board/samsung/common/board.c
>>> index ecf3f76..f07a900 100644
>>> --- a/board/samsung/common/board.c
>>> +++ b/board/samsung/common/board.c
>>> @@ -251,18 +251,28 @@ int board_mmc_init(bd_t *bis)
>>>   {
>>>   	int ret;
>>>
>>> +	if (boot_device() == BOOT_DEVICE_SDMMC) {
>>> +#ifdef CONFIG_SDHCI
>>> +		/* mmc initializattion for available channels */
>>> +		ret = exynos_mmc_init(gd->fdt_blob);
>>> +#endif
>>>   #ifdef CONFIG_DWMMC
>>> -	/* dwmmc initializattion for available channels */
>>> -	ret = exynos_dwmmc_init(gd->fdt_blob);
>>> -	if (ret)
>>> -		debug("dwmmc init failed\n");
>>> +		/* dwmmc initializattion for available channels */
>>> +		ret = exynos_dwmmc_init(gd->fdt_blob);
>>> +#endif
>>> +	} else {
>>> +#ifdef CONFIG_DWMMC
>>> +		/* dwmmc initializattion for available channels */
>>> +		ret = exynos_dwmmc_init(gd->fdt_blob);
>>>   #endif
>>>   #ifdef CONFIG_SDHCI
>>> -	/* mmc initializattion for available channels */
>>> -	ret = exynos_mmc_init(gd->fdt_blob);
>>> +		/* mmc initializattion for available channels */
>>> +		ret = exynos_mmc_init(gd->fdt_blob);
>>> +#endif
>>> +	}
>>> +
>>
>> It looks little confused.
>> Could you please re-arrange this code like this?
>
> If re-arrange the below code, i want to call the dwmmc-init function at first.
> Is there a special reason for sequence(sdhci->dwmmc)?
>
> Best Regards,
> Jaehoon Chung

Please look at my proposed solution in the reply to Minkyu email.

Thanks,
-- 
Przemyslaw Marczak
Samsung R&D Institute Poland
Samsung Electronics
p.marczak at samsung.com