The hardware is described in detail on Kobol's wiki at
https://wiki.kobol.io/helios64/intro/.

This commit is based on downstream work in Armbian by Aditya Prayoga [1].
The devicetree is taken from Linux v5.12-rc1 and was originally submitted there by
Uwe Kleine-Koenig [2].

[1] https://github.com/ukleinek/armbian-build/blob/35c85295d351830aa59b624db524ba04b238faae/patch/kernel/rockchip64-current/add-board-helios64.patch
[2] https://github.com/torvalds/linux/blob/7a7fd0de4a9804299793e564a555a49c1fc924cb/arch/arm64/boot/dts/rockchip/rk3399-kobol-helios64.dts

Signed-off-by: Dennis Gilmore <dennis@ausil.us>

- mvebu: Turris MOX misc updates (cmds, rescue mode, LED's etc)
  (Marek)
- mvebu: correct Armada 8K addresses (Heinrich)

0x04000000- 0x06000000 is reserved memory. We cannot load to anything here.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Stefan Roese <sr@denx.de>

Enable configuration options to support Turris network boot. This
includes FIT support and some crypto commands.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>

Add nodes for SPI NOR partitions to the device tree of Turris MOX, as
are in Linux' device tree.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Stefan Roese <sr@denx.de>

Add default fdtfile environment variable with value
marvell/armada-3720-turris-mox.dtb.

This can be useful for some boot scenarios.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>

Configure blinking on ethernet PHY LEDs on the MOX A board when entering
rescue mode via reset button.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>

Add necessary config options and board code to support board factory
reset / rescue mode on Turris MOX.

In order to also support invoking rescue mode from U-Boot console,
without having to press the factory reset button, put the rescue command
into `bootcmd_rescue` default environment variable. When factory reset
button is pressed, invoke rescue mode via distroboot by setting
`boot_targets` to `rescue`.

Rescue boot from console can be invoked by running
  run bootcmd_rescue

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>

Add nodes for indicator LED and reset button so that board code can
implement board factory reset mechanism.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>

The fragmented files were not correctly read because of two issues:

- The squashfs_file_info struct has a field named 'comp', which tells if
the file's fragment is compressed or not. This field was always set to
'true' in sqfs_get_regfile_info and sqfs_get_lregfile_info. It should
actually take sqfs_frag_lookup's return value. This patch addresses
these two assignments.

- In sqfs_read, the fragments (compressed or not) were copied to the
output buffer through a for loop which was reading data at the wrong
offset. Replace these loops by equivalent calls to memcpy, with the
right parameters.

I tested this patch by comparing the MD5 checksum of a few fragmented
files with the respective md5sum output in sandbox, considering both
compressed and uncompressed fragments.

Signed-off-by: Joao Marcos Costa <jmcosta944@gmail.com>
Tested-by: Richard Genoud <richard.genoud@posteo.net>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>