toradex: configblock: initialize MMC before switching partition

If the module is in serial downloader mode, we do no longer read the
environment from eMMC. Therefor, the eMMC is unitialized when trying
to read the config block. Use mmc_init to initialize the selected
MMC device before using it.

Note: In case the MMC has already been initialized, the mmc_init
detects that and returns immediately.

Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
Acked-by: Max Krummenacher <max.krummenacher@toradex.com>
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Reviewed-by: Igor Opaniuk <igor.opaniuk@toradex.com>
Reviewed-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>

diff --git a/board/toradex/common/tdx-cfg-block.c b/board/toradex/common/tdx-cfg-block.c
index f69c4433b24376398724e155cf38e3677e278888..67e0557f678143d85422c467000f23fd5c3742ce 100644 (file)
--- a/board/toradex/common/tdx-cfg-block.c
+++ b/board/toradex/common/tdx-cfg-block.c
@@ -129,6 +129,10 @@ static int tdx_cfg_block_mmc_storage(u8 *config_block, int write)
                ret = -ENODEV;
                goto out;
        }
+       if (mmc_init(mmc)) {
+               puts("MMC init failed\n");
+               return -EINVAL;
+       }
        if (part != mmc_get_blk_desc(mmc)->hwpart) {
                if (blk_select_hwpart_devnum(IF_TYPE_MMC, dev, part)) {
                        puts("MMC partition switch failed\n");