geam6ul: Add mmc_late_init

Let the runtime code can set the mmcdev and mmcroot based
on the devno using mmc_get_env_dev instead of defining
separately in build-time configs using mmc_late_init func.

Cc: Matteo Lisi <matteo.lisi@engicam.com>
Cc: Michael Trimarchi <michael@amarulasolutions.com>
Cc: Stefano Babic <sbabic@denx.de>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>

board/engicam/geam6ul/geam6ul.c

@@ -7,6 +7,7 @@
  */
 
 #include <common.h>
+#include <mmc.h>
 
 #include <asm/io.h>
 #include <asm/gpio.h>
@@ -103,12 +104,33 @@ static void setup_gpmi_nand(void)
 }
 #endif /* CONFIG_NAND_MXS */
 
+#ifdef CONFIG_ENV_IS_IN_MMC
+static void mmc_late_init(void)
+{
+	char cmd[32];
+	char mmcblk[32];
+	u32 dev_no = mmc_get_env_dev();
+
+	setenv_ulong("mmcdev", dev_no);
+
+	/* Set mmcblk env */
+	sprintf(mmcblk, "/dev/mmcblk%dp2 rootwait rw", dev_no);
+	setenv("mmcroot", mmcblk);
+
+	sprintf(cmd, "mmc dev %d", dev_no);
+	run_command(cmd, 0);
+}
+#endif
+
 int board_late_init(void)
 {
 	switch ((imx6_src_get_boot_mode() & IMX6_BMODE_MASK) >>
 			IMX6_BMODE_SHIFT) {
 	case IMX6_BMODE_SD:
 	case IMX6_BMODE_ESD:
+#ifdef CONFIG_ENV_IS_IN_MMC
+		mmc_late_init();
+#endif
 		setenv("modeboot", "mmcboot");
 		break;
 	case IMX6_BMODE_NAND:

include/configs/imx6ul_geam.h

@@ -44,9 +44,7 @@
 	"fdt_file=" CONFIG_DEFAULT_FDT_FILE "\0" \
 	"fdt_addr=0x87800000\0" \
 	"boot_fdt=try\0" \
-	"mmcdev=0\0" \
 	"mmcpart=1\0" \
-	"mmcroot=/dev/mmcblk0p2 rootwait rw\0" \
 	"nandroot=ubi0:rootfs rootfstype=ubifs\0" \
 	"mmcautodetect=yes\0" \
 	"mmcargs=setenv bootargs console=${console},${baudrate} " \