On Tue, 19 Feb 2019 15:46:26 +0530, Jagan Teki wrote:

Goodix CTP controllers support analog, digital and gpio regulator
supplies on relevant controller pin configurations.

Out of which AVDD28 and VDDIO regulators are required in few goodix CTP
chips during power-on sequence.

AVDD22, DVDD12 regulators have no relevant functionality described from
datasheet [1].

So, document both AVDD28, VDDIO regulators into optional properties since
few of the goodix chip do work without these regulator power-on sequence.

[1] GT5663 Datasheet_English_20151106_Rev.01

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
---
 Documentation/devicetree/bindings/input/touchscreen/goodix.txt | 2 ++
 1 file changed, 2 insertions(+)

Reviewed-by: Rob Herring <robh@kernel.org>