diff mbox

[2/2] drm: bridge: add sil902x DT bindings doc

Message ID 1452079551-30914-2-git-send-email-boris.brezillon@free-electrons.com (mailing list archive)
State New, archived
Headers show

Commit Message

Boris BREZILLON Jan. 6, 2016, 11:25 a.m. UTC
Add Sil9022 DT bindings description.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
---
 .../devicetree/bindings/display/bridge/sil902x.txt | 31 ++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/bridge/sil902x.txt

Comments

Rob Herring (Arm) Jan. 6, 2016, 1:19 p.m. UTC | #1
On Wed, Jan 06, 2016 at 12:25:51PM +0100, Boris Brezillon wrote:
> Add Sil9022 DT bindings description.
> 
> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
> ---
>  .../devicetree/bindings/display/bridge/sil902x.txt | 31 ++++++++++++++++++++++
>  1 file changed, 31 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/bridge/sil902x.txt
> 
> diff --git a/Documentation/devicetree/bindings/display/bridge/sil902x.txt b/Documentation/devicetree/bindings/display/bridge/sil902x.txt
> new file mode 100644
> index 0000000..7f1339f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/bridge/sil902x.txt
> @@ -0,0 +1,31 @@
> +sil902x HDMI bridge bindings
> +
> +Required properties:
> +	- compatible: "sil,sil9022"
> +	- reg: i2c address of the bridge
> +	- reset-gpios: OF device-tree gpio specification for RST_N pin.
> +
> +Optional properties:
> +	- interrupts-extended or interrupt-parent + interrupts: describe
> +	  the interrupt line used to inform the host about hotplug events.
> +
> +Optional subnodes:
> +	- video input: Device node can contain video input port node to
> +	  connect the bridge to a display controller output (See this
> +	  documentation [1]).
> +
> +[1]: Documentation/devicetree/bindings/media/video-interfaces.txt
> +
> +Example:
> +	hdmi-bridge@39 {
> +		compatible = "sil,sil9022";
> +		reg = <0x39>;
> +		reset-gpios = <&gpx1 5 1 0 0>;

4 GPIO cells? Valid, but unusual.

> +		ports {
> +			port@0 {

Either need a reg property here or drop the unit address. You could 
remove ports as well.

> +				bridge_in: endpoint {
> +					remote-endpoint = <&dc_out>;
> +				};
> +			};
> +		};
> +	};
> -- 
> 2.1.4
>
Boris BREZILLON Jan. 6, 2016, 1:24 p.m. UTC | #2
Hi Rob,

On Wed, 6 Jan 2016 07:19:59 -0600
Rob Herring <robh@kernel.org> wrote:

> On Wed, Jan 06, 2016 at 12:25:51PM +0100, Boris Brezillon wrote:
> > Add Sil9022 DT bindings description.
> > 
> > Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
> > ---
> >  .../devicetree/bindings/display/bridge/sil902x.txt | 31 ++++++++++++++++++++++
> >  1 file changed, 31 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/display/bridge/sil902x.txt
> > 
> > diff --git a/Documentation/devicetree/bindings/display/bridge/sil902x.txt b/Documentation/devicetree/bindings/display/bridge/sil902x.txt
> > new file mode 100644
> > index 0000000..7f1339f
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/display/bridge/sil902x.txt
> > @@ -0,0 +1,31 @@
> > +sil902x HDMI bridge bindings
> > +
> > +Required properties:
> > +	- compatible: "sil,sil9022"
> > +	- reg: i2c address of the bridge
> > +	- reset-gpios: OF device-tree gpio specification for RST_N pin.
> > +
> > +Optional properties:
> > +	- interrupts-extended or interrupt-parent + interrupts: describe
> > +	  the interrupt line used to inform the host about hotplug events.
> > +
> > +Optional subnodes:
> > +	- video input: Device node can contain video input port node to
> > +	  connect the bridge to a display controller output (See this
> > +	  documentation [1]).
> > +
> > +[1]: Documentation/devicetree/bindings/media/video-interfaces.txt
> > +
> > +Example:
> > +	hdmi-bridge@39 {
> > +		compatible = "sil,sil9022";
> > +		reg = <0x39>;
> > +		reset-gpios = <&gpx1 5 1 0 0>;
> 
> 4 GPIO cells? Valid, but unusual.

Hehe, I blindly copied nxp,ptn3460 doc, which is defining such GPIO
descriptors :-). I can change that if you want.

> 
> > +		ports {
> > +			port@0 {
> 
> Either need a reg property here or drop the unit address. You could 
> remove ports as well.

Actually we'll likely define a 2nd port for the audio input, so I'd
prefer keeping the ports and @0 suffix and adding a reg property rather
than just defining port { ... };

Best Regards,

Boris
diff mbox

Patch

diff --git a/Documentation/devicetree/bindings/display/bridge/sil902x.txt b/Documentation/devicetree/bindings/display/bridge/sil902x.txt
new file mode 100644
index 0000000..7f1339f
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/bridge/sil902x.txt
@@ -0,0 +1,31 @@ 
+sil902x HDMI bridge bindings
+
+Required properties:
+	- compatible: "sil,sil9022"
+	- reg: i2c address of the bridge
+	- reset-gpios: OF device-tree gpio specification for RST_N pin.
+
+Optional properties:
+	- interrupts-extended or interrupt-parent + interrupts: describe
+	  the interrupt line used to inform the host about hotplug events.
+
+Optional subnodes:
+	- video input: Device node can contain video input port node to
+	  connect the bridge to a display controller output (See this
+	  documentation [1]).
+
+[1]: Documentation/devicetree/bindings/media/video-interfaces.txt
+
+Example:
+	hdmi-bridge@39 {
+		compatible = "sil,sil9022";
+		reg = <0x39>;
+		reset-gpios = <&gpx1 5 1 0 0>;
+		ports {
+			port@0 {
+				bridge_in: endpoint {
+					remote-endpoint = <&dc_out>;
+				};
+			};
+		};
+	};