[U-Boot] [PATCH v2 5/9] am335x_evm: Bring in 'boot_fdt' logic from i.MX

[Tom Rini]

Bring in the 'boot_fdt' environment variable that i.MX boards use to try
and load a device tree when booting.

Signed-off-by: Tom Rini <trini at ti.com>
---
 include/configs/am335x_evm.h |   21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/include/configs/am335x_evm.h b/include/configs/am335x_evm.h
index 7d755f1..85c4632 100644
--- a/include/configs/am335x_evm.h
+++ b/include/configs/am335x_evm.h
@@ -84,6 +84,7 @@
 	"loadaddr=0x80200000\0" \
 	"fdtaddr=0x80F80000\0" \
 	"fdt_high=0xffffffff\0" \
+	"boot_fdt=try\0" \
 	"rdaddr=0x81000000\0" \
 	"bootdir=/boot\0" \
 	"bootfile=uImage\0" \
@@ -131,6 +132,20 @@
 	"loadramdisk=load mmc ${mmcdev} ${rdaddr} ramdisk.gz\0" \
 	"loaduimage=load mmc ${bootpart} ${loadaddr} ${bootdir}/${bootfile}\0" \
 	"loadfdt=load mmc ${bootpart} ${fdtaddr} ${bootdir}/${fdtfile}\0" \
+	"mmcloados=run mmcargs; " \
+		"if test ${boot_fdt} = yes || test ${boot_fdt} = try; then " \
+			"if run loadfdt; then " \
+				"bootm ${loadaddr} - ${fdtaddr}; " \
+			"else " \
+				"if test ${boot_fdt} = try; then " \
+					"bootm; " \
+				"else " \
+					"echo WARN: Cannot load the DT; " \
+				"fi; " \
+			"fi; " \
+		"else " \
+			"bootm; " \
+		"fi;\0" \
 	"mmcboot=mmc dev ${mmcdev}; " \
 		"if mmc rescan; then " \
 			"echo SD/MMC found on device ${mmcdev};" \
@@ -142,11 +157,7 @@
 				"echo Running uenvcmd ...;" \
 				"run uenvcmd;" \
 			"fi;" \
-			"if run loaduimage; then " \
-				"run loadfdt;" \
-				"run mmcargs; " \
-				"bootm ${loadaddr} - ${fdtaddr};" \
-			"fi;" \
+			"run mmcloados;" \
 		"fi;\0" \
 	"spiboot=echo Booting from spi ...; " \
 		"run spiargs; " \
-- 
1.7.9.5