[U-Boot] [PATCH] imx: mx6: add is_boot_from_usb define

[Sean Nyekjaer]

This enables us to detect if the i.MX6 SoC
is booting from USB.

Signed-off-by: Sean Nyekjaer <sean.nyekjaer at prevas.dk>
---
 arch/arm/include/asm/arch-mx6/imx-regs.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/arm/include/asm/arch-mx6/imx-regs.h b/arch/arm/include/asm/arch-mx6/imx-regs.h
index 095eb74195..10da611968 100644
--- a/arch/arm/include/asm/arch-mx6/imx-regs.h
+++ b/arch/arm/include/asm/arch-mx6/imx-regs.h
@@ -998,4 +998,11 @@ struct pwm_regs {
 	u32	cnr;
 };
 #endif /* __ASSEMBLER__*/
+
+/*
+ * If ROM fail back to USB recover mode, USBPH0_PWD will be clear to use USB
+ * If boot from the other mode, USB0_PWD will keep reset value
+ */
+#define is_boot_from_usb(void)	(!(readl(USB_PHY0_BASE_ADDR) & (1 << 20)))
+
 #endif /* __ASM_ARCH_MX6_IMX_REGS_H__ */
-- 
2.17.0