于 2019年10月3日 GMT+08:00 下午7:47:33, Maxime Ripard mripard@kernel.org 写到:
On Thu, Oct 03, 2019 at 12:15:24PM +0530, Jagan Teki wrote:
Allwinner MIPI DSI controllers are supplied with SoC DSI power rails via VCC-DSI pin.
Some board still work without supplying this but give more faith on datasheet and hardware schematics and document this supply property in required property list.
Reviewed-by: Rob Herring robh@kernel.org Tested-by: Merlijn Wajer merlijn@wizzup.org Signed-off-by: Jagan Teki jagan@amarulasolutions.com
.../bindings/display/allwinner,sun6i-a31-mipi-dsi.yaml | 3
+++
1 file changed, 3 insertions(+)
diff --git
a/Documentation/devicetree/bindings/display/allwinner,sun6i-a31-mipi-dsi.yaml b/Documentation/devicetree/bindings/display/allwinner,sun6i-a31-mipi-dsi.yaml
index 47950fced28d..9d4c25b104f6 100644
a/Documentation/devicetree/bindings/display/allwinner,sun6i-a31-mipi-dsi.yaml
+++
b/Documentation/devicetree/bindings/display/allwinner,sun6i-a31-mipi-dsi.yaml
@@ -36,6 +36,9 @@ properties: resets: maxItems: 1
- vcc-dsi-supply:
- description: VCC-DSI power supply of the DSI encoder
The driver treats it as mandatory, so I've added it to the binding, as suggested by the commit log.
No. The regulator_get function will return dummy regulator, rather than fail, if the regulator is not specified.
Maxime