arm: mvebu: fix boot from UART on ClearFog Base
The ClearFog Base boot from UART when setting the DIP switches to 01001.
Unfortunately, the SPL code sometimes fails to detect the UART boot
method at run-time. Add an alternative SAR UART boot value to fix this.
Note that this alternative value is not documented (Armada 38x Hardware
Specifications, Table 48). But experimentations showed it on the
ClearFog Base.
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/arch/arm/mach-mvebu/include/mach/soc.h b/arch/arm/mach-mvebu/include/mach/soc.h
index cdd64fb..1d30276 100644
--- a/arch/arm/mach-mvebu/include/mach/soc.h
+++ b/arch/arm/mach-mvebu/include/mach/soc.h
@@ -142,6 +142,7 @@
#define BOOT_DEV_SEL_MASK (0x3f << BOOT_DEV_SEL_OFFS)
#define BOOT_FROM_UART 0x28
+#define BOOT_FROM_UART_ALT 0x3f
#define BOOT_FROM_SPI 0x32
#define BOOT_FROM_MMC 0x30
#define BOOT_FROM_MMC_ALT 0x31
diff --git a/arch/arm/mach-mvebu/spl.c b/arch/arm/mach-mvebu/spl.c
index 3cf02a5..a72a769 100644
--- a/arch/arm/mach-mvebu/spl.c
+++ b/arch/arm/mach-mvebu/spl.c
@@ -42,6 +42,9 @@
return BOOT_DEVICE_MMC1;
#endif
case BOOT_FROM_UART:
+#ifdef BOOT_FROM_UART_ALT
+ case BOOT_FROM_UART_ALT:
+#endif
return BOOT_DEVICE_UART;
case BOOT_FROM_SPI:
default: