u-boot fw-utils: Add alternate fw_env config
Allows fw_setenv/fw_printenv tools to access alternate bmc image.
Change-Id: I7f634fd1201f5df1af01f4407d9d8791557242ae
Signed-off-by: Edward A. James <eajames@us.ibm.com>
diff --git a/meta-openbmc-bsp/meta-aspeed/meta-ast2400/recipes-bsp/u-boot/files/alt_fw_env.config b/meta-openbmc-bsp/meta-aspeed/meta-ast2400/recipes-bsp/u-boot/files/alt_fw_env.config
new file mode 100644
index 0000000..185603c
--- /dev/null
+++ b/meta-openbmc-bsp/meta-aspeed/meta-ast2400/recipes-bsp/u-boot/files/alt_fw_env.config
@@ -0,0 +1,25 @@
+# Configuration file for fw_(printenv/setenv) utility.
+# Up to two entries are valid, in this case the redundant
+# environment sector is assumed present.
+# Notice, that the "Number of sectors" is ignored on NOR and SPI-dataflash.
+# Futhermore, if the Flash sector size is ommitted, this value is assumed to
+# be the same as the Environment size, which is valid for NOR and SPI-dataflash
+
+# NOR example
+# MTD device name Device offset Env. size Flash sector size Number of sectors
+#/dev/mtd1 0x0000 0x20000 0x20000
+#/dev/mtd2 0x0000 0x4000 0x4000
+
+# MTD SPI-dataflash example
+# MTD device name Device offset Env. size Flash sector size Number of sectors
+#/dev/mtd2 0x00000 0x20000
+/dev/mtd/alt-u-boot-env 0x00000 0x10000
+/dev/mtd/alt-u-boot-env 0x10000 0x10000
+#/dev/mtd5 0x4200 0x4200
+#/dev/mtd6 0x4200 0x4200
+
+# NAND example
+#/dev/mtd0 0x4000 0x4000 0x20000 2
+
+# Block device example
+#/dev/mmcblk0 0xc0000 0x20000