[PATCH v4 3/3] ARM64: dts: meson: meson-gx: add the SAR ADC

[Kevin Hilman]

Martin Blumenstingl <martin.blumenstingl at googlemail.com> writes:

> Add the SAR ADC to meson-gxbb.dtsi and meson-gxl.dtsi. GXBB provides a
> 10-bit ADC while GXL and GXM provide a 12-bit ADC.
> Some boards use resistor ladder buttons connected through one of the ADC
> channels. On newer devices (GXL and GXM) some boards use pull-ups/downs
> to change the resistance (and thus the ADC value) on one of the ADC
> channels to indicate the board revision.
>
> Signed-off-by: Martin Blumenstingl <martin.blumenstingl at googlemail.com>
> Tested-by: Neil Armstrong <narmstrong at baylibre.com>
> Reviewed-by: Andreas Färber <afaerber at suse.de>

Now that IIO driver looks like it will be merged shortly, I applied this
to v4.11/dt64.

Didn't make the first pull request for arm-soc, but may still make it if
I have time to send another batch.

Kevin