[U-Boot] [PATCH v4 3/3] fastboot: ARM: OMAP5: Enable reboot-bootloader

[Dileep Katta]

Implemented fb_set_reboot_flag() for OMAP5 to set
an environment variable 'dofastboot' when reboot-bootloader called.

This environment variable will be checked in boot command and fastboot
will be called if the variable is set.
If the bootcmd env variable of OMAP5 common is overwritten with board-specific
command, then these changes will not apply.

This was originally intended for DRA7 platform, but now applies to all OMAP5.

Ref:
http://git.omapzoom.org/?p=repo/u-boot.git;a=commit;h=19da2e436e9806259cf1f4988b9e046ab256bf2c

Signed-off-by: Angela Stegmaier <angelabaker at ti.com>
Signed-off-by: Dileep Katta <dileep.katta at linaro.org>
---
Changes in v2:
        - None
Changes in v3:
        - Changed the implementation to be more abstract
        - Used environment variable instead of board-specific registers
        - Moved the code to OMAP5
Changes in v4:
	- Removed udelay and sleep after saveenv

 arch/arm/cpu/armv7/omap-common/boot-common.c | 10 ++++++++++
 include/configs/ti_omap5_common.h            |  7 +++++++
 2 files changed, 17 insertions(+)

diff --git a/arch/arm/cpu/armv7/omap-common/boot-common.c b/arch/arm/cpu/armv7/omap-common/boot-common.c
index 17500f2..55ca94d 100644
--- a/arch/arm/cpu/armv7/omap-common/boot-common.c
+++ b/arch/arm/cpu/armv7/omap-common/boot-common.c
@@ -162,3 +162,13 @@ void arch_preboot_os(void)
 	ahci_reset(DWC_AHSATA_BASE);
 }
 #endif
+
+#ifdef CONFIG_CMD_FASTBOOT
+int fb_set_reboot_flag(void)
+{
+	printf("Setting reboot to fastboot flag ...\n");
+	setenv("dofastboot", "1");
+	saveenv();
+	return 0;
+}
+#endif
diff --git a/include/configs/ti_omap5_common.h b/include/configs/ti_omap5_common.h
index cd92454..24f8021 100644
--- a/include/configs/ti_omap5_common.h
+++ b/include/configs/ti_omap5_common.h
@@ -141,13 +141,20 @@
 	"loadfdt=load mmc ${bootpart} ${fdtaddr} ${bootdir}/${fdtfile};\0" \
 	DFUARGS \
 
+
 #define CONFIG_BOOTCOMMAND \
+	"if test ${dofastboot} -eq 1; then " \
+		"echo Boot fastboot requested, resetting dofastboot ...;" \
+		"setenv dofastboot 0; saveenv;" \
+		"echo Booting into fastboot ...; fastboot;" \
+	"fi;" \
 	"run findfdt; " \
 	"run mmcboot;" \
 	"setenv mmcdev 1; " \
 	"setenv bootpart 1:2; " \
 	"setenv mmcroot /dev/mmcblk0p2 rw; " \
 	"run mmcboot;" \
+	""
 
 
 /*
-- 
1.8.3.2