cm-t54: add environment partition runtime detection

Add environment partition runtime detection callback.

Signed-off-by: Dmitry Lifshitz <lifshitz@compulab.co.il>
Acked-by: Igor Grinberg <grinberg@compulab.co.il>

board/compulab/cm_t54/cm_t54.c

@@ -13,6 +13,7 @@
 #include <usb.h>
 #include <mmc.h>
 #include <palmas.h>
+#include <spl.h>
 
 #include <asm/gpio.h>
 #include <asm/arch/sys_proto.h>
@@ -74,6 +75,27 @@ static int cm_t54_palmas_regulator_set(u8 vreg, u8 vval, u8 creg, u8 cval)
 	return 0;
 }
 
+/*
+ * Routine: mmc_get_env_part
+ * Description:  setup environment storage device partition.
+ */
+#ifdef CONFIG_SYS_MMC_ENV_PART
+uint mmc_get_env_part(struct mmc *mmc)
+{
+	u32 bootmode = gd->arch.omap_boot_params.omap_bootmode;
+	uint bootpart = CONFIG_SYS_MMC_ENV_PART;
+
+	/*
+	 * If booted from eMMC boot partition then force eMMC
+	 * FIRST boot partition to be env storage
+	 */
+	if (bootmode == BOOT_DEVICE_MMC2_2)
+		bootpart = 1;
+
+	return bootpart;
+}
+#endif
+
 #if defined(CONFIG_GENERIC_MMC) && !defined(CONFIG_SPL_BUILD)
 #define SB_T54_CD_GPIO 228
 #define SB_T54_WP_GPIO 229

include/configs/cm_t54.h

@@ -49,6 +49,7 @@
 
 #define CONFIG_ENV_IS_IN_MMC
 #define CONFIG_SYS_MMC_ENV_DEV		1		/* SLOT2: eMMC(1) */
+#define CONFIG_SYS_MMC_ENV_PART		0
 #define CONFIG_ENV_OFFSET		0xc0000		/* (in bytes) 768 KB */
 #define CONFIG_ENV_SIZE			(16 << 10)	/* 16 KB */
 #define CONFIG_ENV_OFFSET_REDUND	(CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE)