ARM64: dts: meson: meson-gx: add the SAR ADC

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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@googlemail.com>
Tested-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

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Martin Blumenstingl 2017-01-22 19:17:14 +01:00 • committed by Kevin Hilman

parent 249a2243e9

commit bd80ef5ed4

4 changed files with 32 additions and 0 deletions

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8

arch/arm64/boot/dts/amlogic/meson-gx.dtsi

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10

arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi

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10

arch/arm64/boot/dts/amlogic/meson-gxl.dtsi

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4

arch/arm64/boot/dts/amlogic/meson-gxm.dtsi

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