[PATCH 03/12] ARM: i.MX53: Detect booting from USB

[Sascha Hauer]

The USB download mode can be detected by reading the BMOD[0|1]
bits. Add support for it.

Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---
 arch/arm/mach-imx/boot.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm/mach-imx/boot.c b/arch/arm/mach-imx/boot.c
index c72ec61..b66c29d 100644
--- a/arch/arm/mach-imx/boot.c
+++ b/arch/arm/mach-imx/boot.c
@@ -217,6 +217,12 @@ void imx53_get_boot_source(enum bootsource *src, int *instance)
 	void __iomem *src_base = IOMEM(MX53_SRC_BASE_ADDR);
 	uint32_t cfg1 = readl(src_base + IMX53_SRC_SBMR);
 
+	if (((cfg1 >> 24) & 0x3) == 0x3) {
+		*src = BOOTSOURCE_USB;
+		*instance = 0;
+		return;
+	}
+
 	switch ((cfg1 & 0xff) >> 4) {
 	case 2:
 		*src = BOOTSOURCE_HD;
-- 
2.8.1