From e8537b35bf48979803958c489876952d100afa0a Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Wed, 7 Jun 2017 11:46:14 -0300 Subject: [media] dt-bindings: media/s5p-cec.txt: document needs-hpd property Needed for boards that wire the CEC pin in such a way that it is unavailable when the HPD is low. Signed-off-by: Hans Verkuil Acked-by: Rob Herring Signed-off-by: Mauro Carvalho Chehab --- Documentation/devicetree/bindings/media/s5p-cec.txt | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Documentation/devicetree/bindings/media/s5p-cec.txt b/Documentation/devicetree/bindings/media/s5p-cec.txt index 4bb08d9d940b..261af4d1a791 100644 --- a/Documentation/devicetree/bindings/media/s5p-cec.txt +++ b/Documentation/devicetree/bindings/media/s5p-cec.txt @@ -17,6 +17,12 @@ Required properties: - samsung,syscon-phandle - phandle to the PMU system controller - hdmi-phandle - phandle to the HDMI controller +Optional: + - needs-hpd : if present the CEC support is only available when the HPD + is high. Some boards only let the CEC pin through if the HPD is high, for + example if there is a level converter that uses the HPD to power up + or down. + Example: hdmicec: cec@100B0000 { -- cgit v1.2.3