[U-Boot] [PATCH v2] Add support for initializing MMC

[Chee, Tien Fong <tien.fong.chee@intel.com>]

On Sun, 2018-12-30 at 00:28 +0800, tien.fong.chee at intel.com wrote:
> From: Tien Fong Chee <tien.fong.chee@intel.com>
> 
> Firmware loader would encounter problem if the MMC is accessed before
> initializing it. This patch would adding the support of probing block
> device and initializing MMC before the MMC is accessed by firmware
> loader.
> 
> Signed-off-by: Tien Fong Chee <tien.fong.chee@intel.com>
> 
> ---
> Changes in v2:
> - Initializing MMC through probing the blk device
Please ignore this patch, just realized missing a line status checking
code. I would resend another patch.
> ---
>  drivers/misc/fs_loader.c | 32 ++++++++++++++++++++++++++++++++
>  1 file changed, 32 insertions(+)
> 
> diff --git a/drivers/misc/fs_loader.c b/drivers/misc/fs_loader.c
> index 57a14a3..d981b5a 100644
> --- a/drivers/misc/fs_loader.c
> +++ b/drivers/misc/fs_loader.c
> @@ -12,6 +12,7 @@
>  #include <linux/string.h>
>  #include <mapmem.h>
>  #include <malloc.h>
> +#include <mmc.h>
>  #include <spl.h>
>  
>  DECLARE_GLOBAL_DATA_PTR;
> @@ -252,6 +253,37 @@ static int fs_loader_ofdata_to_platdata(struct
> udevice *dev)
>  
>  static int fs_loader_probe(struct udevice *dev)
>  {
> +#if defined(CONFIG_DM_MMC) && defined(CONFIG_BLK)
> +	int ret;
> +	struct device_platdata *plat = dev->platdata;
> +
> +	ret = mmc_initialize(NULL);
> +	if (ret) {
> +		debug("MMC: could not initialize mmc. error: %d\n",
> ret);
> +
> +		return ret;
> +	}
> +
> +	if (plat->phandlepart.phandle) {
> +		ofnode node = ofnode_get_by_phandle(plat-
> >phandlepart.phandle);
> +
> +		struct udevice *mmc_dev = NULL;
> +
> +		ret = device_get_global_by_ofnode(node, &mmc_dev);
> +		if (!ret) {
> +			struct mmc *mmc = mmc_get_mmc_dev(mmc_dev);
> +			struct udevice *dev;
> +
> +			if (blk_get_from_parent(mmc->dev, &dev))
> +			{
> +				debug("MMC: No block device: %d\n",
> +					ret);
> +
> +				return ret;
> +			}
> +		}
> +	}
> +#endif
>  	return 0;
>  };
>