[U-Boot] [PATCH V2] imx: mx7: Add support for USB and normal boot modes

Eric Nelson eric at nelint.com
Wed Aug 30 22:13:14 UTC 2017

This adds support for two additional boot modes on the i.MX7D SoC, which
is most useful when doing U-Boot development on this chip.

1. "bmode usb" can be used to force the ROM boot loader's serial
2. "bmode normal" can be used to revert to the normal boot mode
   as specified by fuses and BOOT_MODE pins

Signed-off-by: Eric Nelson <eric at nelint.com>
V2 adds "normal" mode as suggested by Troy Kisky
 arch/arm/mach-imx/mx7/soc.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm/mach-imx/mx7/soc.c b/arch/arm/mach-imx/mx7/soc.c
index 87bf105..15be42a 100644
--- a/arch/arm/mach-imx/mx7/soc.c
+++ b/arch/arm/mach-imx/mx7/soc.c
@@ -372,6 +372,9 @@ void set_wdog_reset(struct wdog_regs *wdog)
  * to SBMR1, which will determine the boot device.
 const struct boot_mode soc_boot_modes[] = {
+	{"normal",	MAKE_CFGVAL(0x00, 0x00, 0x00, 0x00)},
+	{"usb",		MAKE_CFGVAL(0x01, 0x00, 0x00, 0x00)},
 	{"ecspi1:0",	MAKE_CFGVAL(0x00, 0x60, 0x00, 0x00)},
 	{"ecspi1:1",	MAKE_CFGVAL(0x40, 0x62, 0x00, 0x00)},
 	{"ecspi1:2",	MAKE_CFGVAL(0x80, 0x64, 0x00, 0x00)},

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