From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexey Brodkin Subject: [PATCH 2/4] drm: Add DT bindings documentation for ARC PGU display controller Date: Fri, 19 Feb 2016 16:03:52 +0300 Message-ID: <1455887034-7739-3-git-send-email-abrodkin@synopsys.com> References: <1455887034-7739-1-git-send-email-abrodkin@synopsys.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1455887034-7739-1-git-send-email-abrodkin@synopsys.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-snps-arc" Errors-To: linux-snps-arc-bounces+gla-linux-snps-arc=m.gmane.org@lists.infradead.org To: linux-kernel@vger.kernel.org Cc: Mark Rutland , devicetree@vger.kernel.org, Pawel Moll , Ian Campbell , Alexey Brodkin , Rob Herring , Kumar Gala , linux-snps-arc@lists.infradead.org List-Id: devicetree@vger.kernel.org This add DT bindings documentation for ARC PGU display controller. Signed-off-by: Alexey Brodkin Cc: Rob Herring Cc: Pawel Moll Cc: Mark Rutland Cc: Ian Campbell Cc: Kumar Gala Cc: devicetree@vger.kernel.org Cc: linux-snps-arc@lists.infradead.org --- .../devicetree/bindings/display/snps,arcpgu.txt | 74 ++++++++++++++++++++++ 1 file changed, 74 insertions(+) create mode 100644 Documentation/devicetree/bindings/display/snps,arcpgu.txt diff --git a/Documentation/devicetree/bindings/display/snps,arcpgu.txt b/Documentation/devicetree/bindings/display/snps,arcpgu.txt new file mode 100644 index 0000000..c8382fb --- /dev/null +++ b/Documentation/devicetree/bindings/display/snps,arcpgu.txt @@ -0,0 +1,74 @@ +ARC PGU + +This is a display controller found on several development boards produced +by Synopsys. The ARC PGU is an RGB streamer that reads the data from a +framebuffer and sends it to a single digital encoder (usually HDMI). + +Required properties: + - compatible: "snps,arcpgu" + - reg: Physical base address and length of the controller's registers. + - clocks: A list of phandle + clock-specifier pairs, one for each + entry in 'clock-names'. + - clock-names: A list of clock names. For ARC PGU it should contain: + - "pxlclk" for the clock feeding the output PLL of the controller. + - encoder-slave: Phandle of encoder chip. + +Required sub-nodes: + - port: The PGU connection to an encoder chip. The connection is modelled + using the OF graph bindings specified in + Documentation/devicetree/bindings/graph.txt. + +Example: + +/ { + ... + + pgu@0xXXXXXXXX { + compatible = "snps,arcpgu"; + reg = <0xXXXXXXXX 0x400>; + clocks = <&clock_node>; + clock-names = "pxlclk"; + encoder-slave = <&encoder_node>; + + port { + pgu_output: endpoint { + remote-endpoint = <&hdmi_enc_input>; + }; + }; + }; + + /* HDMI encoder on I2C bus */ + i2c@0xXXXXXXXX { + compatible = "..."; + + encoder_node:encoder_node@0xXXXXXXXX{ + compatible="..."; + + ports { + port@0 { + reg = <0>; + hdmi_enc_input:endpoint { + remote-endpoint = <&pgu_output>; + }; + }; + + port@1 { + reg = <1>; + hdmi_enc_output:endpoint { + remote-endpoint = <&hdmi_connector_in>; + }; + }; + }; + }; + } + + hdmi0: connector { + compatible = "hdmi-connector"; + + port { + hdmi_connector_in: endpoint { + remote-endpoint = <&hdmi_enc_output>; + }; + }; + }; +}; -- 2.5.0