Dreamplug 3.2.5 alternate new kernel

This kernel is for Dreamplugs only and addresses a few issues including the new U-Boot(s) that use a different machine id.

You can download at
http://www.spinifex.net/plugs/downloads/dreamplug/kernel/dreamplug-3.2.5.tar.xz

Install instructions are at
http://www.spinifex.net/plugs/downloads/dreamplug/kernel/README.kernel

The alternate features are:

U-Boot arcNumber
Dreamplug U-Boots use different arcNumbers depending on when you aquired your Dreamplug. It is either 2659(0xA63) or 3550(0xDDE). The 2659 is also used by the Guruplug. This kernel will boot a Dreamplug which uses either value. There is no need to update the U-Boot environment.
I have tested this on three different U-Boots with both arcNumbers. I would welcome further testing.

SPI flash
This kernel contains support for reading and writing the SPI flash using the u-boot-tools fw_printenv/fw_saveenv utilities.
To take advantage of this feature install u-boot-tools -

Code:

# apt-get install u-boot-tools

Then set the config file to -

Code:

# cat /etc/fw_env.config

# Configuration file for fw_(printenv/saveenv) utility.
# Up to two entries are valid, in this case the redundand
# environment sector is assumed present.
# MTD device name Device offset Env. size Flash sector size
/dev/mtd0 0x30000 0x1000 0x1000

This is known to work for
U-Boot 2011.06-02334-g8f495d9-dirty (Mar 28 2011 - 05:21:06)

Backup your environment before testing fw_saveenv.
The device offset may change for other versions of U-Boot.

** IMPORTANT **
Because this gives you unconstrained access to the SPI flash, you can use this facility to destroy U-Boot and render your Dreamplug unusable.

Boot from ESATA
The kernels is compiled with CONFIG_SATA_MV=y set in the .config. This means that these kernels can be used to boot from a (micro) SDHC with the rootfs on an ESATA drive.

LEDS
The Dreamplug LEDS are named left to right as:
plug:blue:2
plug:green:3
plug:blue:4

CPU Frequency Scaling
To make use of this -

Code:

# apt-get install cpufrequtils

and see kernel Documentation/cpu-freq/user-guide.txt