fw_env: calculate default number of env sectors

[karo-tx-uboot.git] / tools / env / fw_env.config

diff --git a/tools/env/fw_env.config b/tools/env/fw_env.config
index 2432bd866c593d204d20083a7663b76dfc653a3d..c9b9f6a16091f1969559f8b0b4eabbcaa47cec45 100644 (file)
--- a/tools/env/fw_env.config
+++ b/tools/env/fw_env.config
@@ -1,7 +1,22 @@
-# Configuration file for fw_(printenv/saveenv) utility.
-# Up to two entries are valid, in this case the redundand
+# 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 not required 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
 
-# MTD device name      Device offset   Env. size       Flash sector size
+# NOR example
+# MTD device name      Device offset   Env. size       Flash sector size       Number of sectors
 /dev/mtd1              0x0000          0x4000          0x4000
 /dev/mtd2              0x0000          0x4000          0x4000
+
+# MTD SPI-dataflash example
+# MTD device name      Device offset   Env. size       Flash sector size       Number of sectors
+#/dev/mtd5             0x4200          0x4200
+#/dev/mtd6             0x4200          0x4200
+
+# NAND example
+#/dev/mtd0             0x4000          0x4000          0x20000                 2
+
+# Block device example
+#/dev/mmcblk0          0xc0000         0x20000