[U-Boot] [PATCH v3 6/9] board: icore-rqs: Fix mmc get env device

[Jagan Teki <jagannadh.teki@gmail.com>]

As per USDHC boot eFUSE descriptions:
USDHC3 => devno 2
USDHC4 => devno 3

Linux will detect mmc0, mmc1, mmc2 based on the status
"okay" on usdhc so imx6qdl-icore-rqs.dtsi has enabled
usdhc1, usdhc3 and usdhc4.But U-Boot can detect based
on the aliases so add mmc1, mmc2 for usdhc3 and usdhc4
respectively and return the board_mmc_get_env_dev
by subtracting -1

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
---
 arch/arm/dts/imx6qdl-icore-rqs.dtsi     | 5 +++++
 board/engicam/icorem6_rqs/icorem6_rqs.c | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/arch/arm/dts/imx6qdl-icore-rqs.dtsi b/arch/arm/dts/imx6qdl-icore-rqs.dtsi
index 65cbf5a..816cdce 100644
--- a/arch/arm/dts/imx6qdl-icore-rqs.dtsi
+++ b/arch/arm/dts/imx6qdl-icore-rqs.dtsi
@@ -43,6 +43,11 @@
 #include <dt-bindings/clock/imx6qdl-clock.h>
 
 / {
+	aliases {
+		mmc1 = &usdhc3;
+		mmc2 = &usdhc4;
+	};
+
 	memory {
 		reg = <0x10000000 0x80000000>;
 	};
diff --git a/board/engicam/icorem6_rqs/icorem6_rqs.c b/board/engicam/icorem6_rqs/icorem6_rqs.c
index cd73dfa..a55a754 100644
--- a/board/engicam/icorem6_rqs/icorem6_rqs.c
+++ b/board/engicam/icorem6_rqs/icorem6_rqs.c
@@ -13,7 +13,7 @@ DECLARE_GLOBAL_DATA_PTR;
 #ifdef CONFIG_ENV_IS_IN_MMC
 int board_mmc_get_env_dev(int devno)
 {
-	return devno;
+	return devno - 1;
 }
 #endif
 
-- 
2.7.4