[U-Boot] [PATCH 3/3] ARM: configs: cm_fx6: add mtd support

[Christopher Spinrath]

The cm-fx6 module has an on-board spi flash chip. Enable mtd support
and the mtdparts command. Also define a default partitioning, add
it to the default environment, and enable support to overwrite the
partitioning defined in a device tree by it.

These changes move the effective default partitioning from the device
tree shipped with the vendor kernels to u-boot which becomes the single
point of definition for the partitioning for all device tree based
kernels (in particular, for the upstream linux kernel which does not
have a default partitioning defined in its device tree).

Signed-off-by: Christopher Spinrath <christopher.spinrath at rwth-aachen.de>
---
 include/configs/cm_fx6.h | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/include/configs/cm_fx6.h b/include/configs/cm_fx6.h
index f054ca8..c839b03 100644
--- a/include/configs/cm_fx6.h
+++ b/include/configs/cm_fx6.h
@@ -18,6 +18,7 @@
 #define CONFIG_MACH_TYPE		4273
 
 /* CMD */
+#define CONFIG_CMD_MTDPARTS
 
 /* MMC */
 #define CONFIG_SYS_FSL_USDHC_NUM	3
@@ -53,6 +54,20 @@
 #define CONFIG_SF_DEFAULT_SPEED		25000000
 #define CONFIG_SF_DEFAULT_MODE		(SPI_MODE_0)
 
+/* MTD support */
+#ifndef CONFIG_SPL_BUILD
+#define CONFIG_FDT_FIXUP_PARTITIONS
+#define CONFIG_MTD_DEVICE
+#define CONFIG_MTD_PARTITIONS
+#define CONFIG_SPI_FLASH_MTD
+#endif
+
+#define MTDIDS_DEFAULT		"nor0=spi0.0"
+#define MTDPARTS_DEFAULT	"mtdparts=spi0.0:" \
+				"768k(uboot)," \
+				"256k(uboot-environment)," \
+				"-(reserved)"
+
 /* Environment */
 #define CONFIG_ENV_IS_IN_SPI_FLASH
 #define CONFIG_ENV_SPI_MAX_HZ		CONFIG_SF_DEFAULT_SPEED
@@ -83,6 +98,8 @@
 	"video_dvi=mxcfb0:dev=dvi,1280x800M-32 at 50,if=RGB32\0" \
 	"doboot=bootm ${loadaddr}\0" \
 	"doloadfdt=false\0" \
+	"mtdids=" MTDIDS_DEFAULT "\0" \
+	"mtdparts=" MTDPARTS_DEFAULT "\0" \
 	"setboottypez=setenv kernel ${zImage};" \
 		"setenv doboot bootz ${loadaddr} - ${fdtaddr};" \
 		"setenv doloadfdt true;\0" \
@@ -157,7 +174,7 @@
 	"run setupnandboot;" \
 	"run nandboot;"
 
-#define CONFIG_PREBOOT		"usb start"
+#define CONFIG_PREBOOT		"usb start;sf probe"
 
 /* SPI */
 #define CONFIG_SPI
-- 
2.8.3