[U-Boot] [PATCH v2 1/5] toradex: configblock: initialize MMC before switching partition

[Marcel Ziswiler]

From: Stefan Agner <stefan.agner at toradex.com>

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

---

Changes in v2:
- Added my S-b and others R-bs.

 board/toradex/common/tdx-cfg-block.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/board/toradex/common/tdx-cfg-block.c b/board/toradex/common/tdx-cfg-block.c
index f69c4433b2..67e0557f67 100644
--- 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");
-- 
2.21.0