The Libretech ALL-H3-CC has a high density connector for attaching
an eMMC module. The module form factor and connection is specific
to Libretech, and has provisions for split vmmc/vqmmc (core and I/O)
voltage supplies, but this board does not wire the vqmmc side. The
H2+/H3/H5 SoCs do not support alternate I/O voltages for eMMC either.
Only 3.3V is supported. A specific module that ties vqmmc to vmmc,
with both at 3.3V, must be used.
Given that a) eMMC is not designed to be hotplugged, b) power is
always provided on the pins, and c) MMC controllers can deal with
missing cards, we can enable this by default. If a module is attached
it will be picked up by the system.
The device tree change was also submitted to the Linux Kernel and
has already been queued up for 4.19.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
Reviewed-by: Jagan Teki <jagan@openedev.com>
Update the device tree files from the Linux tree as of v4.18-rc3,
exactly Linux commit:
commit 55c5ba5e49a0a124ed416880e8227b493474495e
Author: Chen-Yu Tsai <wens@csie.org>
Date: Tue Apr 24 19:34:22 2018 +0800
arm64: dts: allwinner: h5: Add cpu0 label for first cpu
Since the H3 and H5 are very similar (aside from the actual ARM cores),
they share most the SoC .dtsi and thus have to be updated together.
One tiny change is the removal of the "arm/" prefix from the include
path in the sun50i-h5.dtsi, which is needed because we don't share the
same sophisticated DT directory layout of Linux.
Also we need to fix up the board .dts files already, since the .dtsi
removes some pins, so the .dts can't reference them anymore. This is to
maintain bisectability.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
Acked-by: Jagan Teki <jagan@amarulasolutions.com>
The Libre Computer Project ALL-H3-CC has three models, all using the
same board design, but with different pin compatible SoCs and amount of
DRAM.
Currently only the H3 1GB DRAM variant is supported. To support the two
other variants, first split the original device tree into a common board
design part and an SoC specific part.
The SoC part only defines which SoC is used and model name, and includes
the SoC specific dtsi file and the common design dtsi file.
Also fix up the SPDX identifier line to use the correct comment style,
and place it on the first line.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
Reviewed-by: Jagan Teki <jagan@openedev.com>
