This adds support for the power button attached to the Embedded Controller
on a Dell Wyse 3020 "Ariel" board.
However, while the EC itself is controlled via I2C, the input capability
for the power button acts as a separate device attached to the SPI, hence
it has a separate device node.
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Link: https://lore.kernel.org/r/20210121034130.1381872-11-lkundrak@v3.sk'
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Drop the linux,usable-memory properties; the schema is unhappy about
them.
They've been cargo-culted from Open Firmware and I don't know what
purpose they serve. Perhaps they are meant to provide the OFW runtime.
In that case it's still okay to drop them from here; OFW is welcome to add
it upon boot.
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Link: https://lore.kernel.org/r/20210121034130.1381872-6-lkundrak@v3.sk'
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
I've managed to get about everything wrong while digging these out of
OEM's board file.
Correct the bus numbers, the exact model of the NOR flash, polarity of
the chip selects and align the SPI frequency with the data sheet.
Tested that it works now, with a slight fix to the PXA SSP driver.
Link: https://lore.kernel.org/r/20200419171157.672999-16-lkundrak@v3.sk
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Cc: <stable@vger.kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This is a Dell Wyse thin client, variously referred to as "Ariel",
"3020" or "Tx0D" where "x" stands for the software it was shipped with.
I somewhat arbitrarily chose "ariel".
There are bits missing, because the drivers are not in and bindings are not
settled yet:
* Things missing from mmp3.dtsi:
HSIC controller and its PHY (only the internal Ethernet is connected
here, the hub with external USB2 ports is connected to the U2O controller
that works well), Vivante GC2000 GPU
* &twsi1/regulator@19
Marvell 88pm867 power regulator
* &twsi3/vga-dvi-encoder@76
Chrontel CH7033B-BF VGA & DVI encoder
* &twsi3/sound-codec@30
Sound chip, probably a Marvell 88ce156
* &twsi4/embedded-controller@58
ENE KB3930QF Embedded Controller, also seems to be connected to &ssp4.
Might not need a driver -- about the only useful thing it can do is to
reboot the machine when tickled via some GPIO lines.
Also there seems to be something at &twsi1 address 0x50.
Link: https://lore.kernel.org/r/20191022152837.3553524-1-lkundrak@v3.sk
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Signed-off-by: Olof Johansson <olof@lixom.net>
