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Message-Id: <1449490265-6752-2-git-send-email-Liviu.Dudau@arm.com>
Date: Mon, 7 Dec 2015 12:11:02 +0000
From: Liviu Dudau <Liviu.Dudau@....com>
To: David Airlie <airlied@...ux.ie>,
Catalin Marinas <catalin.marinas@....com>,
Will Deacon <will.deacon@....com>,
Rob Herring <robh+dt@...nel.org>,
Sudeep Holla <sudeep.holla@....com>,
Jon Medhurst <tixy@...aro.org>,
Mark Rutland <mark.rutland@....com>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Kumar Gala <galak@...eaurora.org>,
Rob Herring <robh@...nel.org>,
Russell King <rmk+kernel@....linux.org.uk>
Cc: Pawel Moll <pawel.moll@....com>, Arnd Bergmann <arnd@...db.de>,
Olof Johansson <olof@...om.net>,
Punit Agrawal <punit.agrawal@....com>,
DRI devel <dri-devel@...ts.freedesktop.org>,
devicetree <devicetree@...r.kernel.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Andrew Morton <akpm@...ux-foundation.org>,
LAKML <linux-arm-kernel@...ts.infradead.org>,
LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH v5 1/4] drm: arm: Add DT bindings documentation for HDLCD driver.
Cc: Pawel Moll <pawel.moll@....com>
Cc: Mark Rutland <mark.rutland@....com>
Cc: Ian Campbell <ijc+devicetree@...lion.org.uk>
Cc: Kumar Gala <galak@...eaurora.org>
Signed-off-by: Liviu Dudau <Liviu.Dudau@....com>
Acked-by: Rob Herring <robh@...nel.org>
---
.../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@...00000 {
+ 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@0 {
+ remote-endpoint = <&hdmi_enc_input>;
+ };
+ };
+ };
+
+ /* HDMI encoder on I2C bus */
+ i2c@...a0000 {
+ ....
+ hdmi-transmitter@70 {
+ compatible = ".....";
+ reg = <0x70>;
+ port@0 {
+ hdmi_enc_input: endpoint {
+ remote-endpoint = <&hdlcd_output>;
+ };
+
+ hdmi_enc_output: endpoint {
+ remote-endpoint = <&hdmi_1_port>;
+ };
+ };
+ };
+
+ };
+
+ hdmi1: connector@1 {
+ compatible = "hdmi-connector";
+ type = "a";
+ port {
+ hdmi_1_port: endpoint {
+ remote-endpoint = <&hdmi_enc_output>;
+ };
+ };
+ };
+
+ ...
+};
--
2.6.2
--
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