From 1eb006249e2fe84e889a89154d71a9cb0093eed8 Mon Sep 17 00:00:00 2001 From: Stephan Gerhold Date: Tue, 3 Aug 2021 12:12:37 +0200 Subject: [PATCH] arm: mach-snapdragon: misc: Initialize eMMC if necessary At the moment U-Boot produces an empty MAC address (02:00:00:00:00:00) if the eMMC is not used by anything in U-Boot (e.g. with CONFIG_ENV_IS_NOWHERE=y instead of having the environment on eMMC). This happens because then there is nothing that actually initializes the eMMC and reads the "cid" that is later accessed. To fix this, call mmc_init() to ensure the eMMC is initialized. There is no functional difference if the eMMC is already initialized since then mmc_init() will just return without doing anything. Reviewed-by: Ramon Fried Signed-off-by: Stephan Gerhold --- arch/arm/mach-snapdragon/misc.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/arm/mach-snapdragon/misc.c b/arch/arm/mach-snapdragon/misc.c index 985625a..fbd5f4d 100644 --- a/arch/arm/mach-snapdragon/misc.c +++ b/arch/arm/mach-snapdragon/misc.c @@ -33,6 +33,9 @@ u32 msm_board_serial(void) if (!mmc_dev) return 0; + if (mmc_init(mmc_dev)) + return 0; + return UNSTUFF_BITS(mmc_dev->cid, 16, 32); } -- 2.7.4