[PATCH v3 1/4] drm: arm: Add DT bindings documentation for HDLCD driver.

Liviu Dudau
2015-12-02T14:51:55Z

On Wed, Dec 02, 2015 at 08:25:15AM -0600, Rob Herring wrote:
> On Wed, Dec 02, 2015 at 12:22:59PM +0000, Liviu Dudau wrote:
> > Cc: Rob Herring <robh+dt@kernel.org>
> > Cc: Pawel Moll <pawel.moll@arm.com>
> > Cc: Mark Rutland <mark.rutland@arm.com>
> > Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
> > Cc: Kumar Gala <galak@codeaurora.org>
> >
> > Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com>
>
> I still think you should have a more specific compatible string, but
> here's some rope:

:) Now I need to find some soap and a small wooden box.

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

Thanks!
Liviu

>
> > ---
> > .../devicetree/bindings/display/arm,hdlcd.txt | 79 ++++++++++++++++++++++
> > 1 file changed, 79 insertions(+)
> > create mode 100644 Documentation/devicetree/bindings/display/arm,hdlcd.txt
> >
> > diff --git a/Documentation/devicetree/bindings/display/arm,hdlcd.txt b/Documentation/devicetree/bindings/display/arm,hdlcd.txt
> > new file mode 100644
> > index 0000000..78bc242
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/display/arm,hdlcd.txt
> > @@ -0,0 +1,79 @@
> > +ARM HDLCD
> > +
> > +This is a display controller found on several development platforms produced
> > +by ARM Ltd and in more modern of its' Fast Models. The HDLCD is an RGB
> > +streamer that reads the data from a framebuffer and sends it to a single
> > +digital encoder (DVI or HDMI).
> > +
> > +Required properties:
> > + - compatible: "arm,hdlcd"
> > + - reg: Physical base address and length of the controller's registers.
> > + - interrupts: One interrupt used by the display controller to notify the
> > + interrupt controller when any of the interrupt sources programmed in
> > + the interrupt mask register have activated.
> > + - clocks: A list of phandle + clock-specifier pairs, one for each
> > + entry in 'clock-names'.
> > + - clock-names: A list of clock names. For HDLCD it should contain:
> > + - "pxlclk" for the clock feeding the output PLL of the controller.
> > +
> > +Required sub-nodes:
> > + - port: The HDLCD connection to an encoder chip. The connection is modeled
> > + using the OF graph bindings specified in
> > + Documentation/devicetree/bindings/graph.txt.
> > +
> > +Optional properties:
> > + - memory-region: phandle to a node describing memory (see
> > + Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt) to be
> > + used for the framebuffer; if not present, the framebuffer may be located
> > + anywhere in memory.
> > +
> > +
> > +Example:
> > +
> > +/ {
> > + ...
> > +
> > + hdlcd at 2b000000 {
> > + compatible = "arm,hdlcd";
> > + reg = <0 0x2b000000 0 0x1000>;
> > + interrupts = <GIC_SPI 85 IRQ_TYPE_LEVEL_HIGH>;
> > + clocks = <&oscclk5>;
> > + clock-names = "pxlclk";
> > + port {
> > + hdlcd_output: endpoint at 0 {
> > + remote-endpoint = <&hdmi_enc_input>;
> > + };
> > + };
> > + };
> > +
> > + /* HDMI encoder on I2C bus */
> > + i2c at 7ffa0000 {
> > + ....
> > + hdmi-transmitter at 70 {
> > + compatible = ".....";
> > + reg = <0x70>;
> > + port at 0 {
> > + hdmi_enc_input: endpoint {
> > + remote-endpoint = <&hdlcd_output>;
> > + };
> > +
> > + hdmi_enc_output: endpoint {
> > + remote-endpoint = <&hdmi_1_port>;
> > + };
> > + };
> > + };
> > +
> > + };
> > +
> > + hdmi1: connector at 1 {
> > + compatible = "hdmi-connector";
> > + type = "a";
> > + port {
> > + hdmi_1_port: endpoint {
> > + remote-endpoint = <&hdmi_enc_output>;
> > + };
> > + };
> > + };
> > +
> > + ...
> > +};
> > --
> > 2.6.2
> >
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