linux-kernel - [PATCHv2 3/5] arm64: dts: allwinner: a64: add simplefb for A64 SoC

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Date:   Thu, 15 Mar 2018 16:25:08 +0000
From:   Harald Geyer <harald@...ib.org>
To:     Maxime Ripard <maxime.ripard@...tlin.com>,
        Chen-Yu Tsai <wens@...e.org>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Andre Przywara <andre.przywara@....com>,
        Icenowy Zheng <icenowy@...c.io>, info@...mex.com,
        Harald Geyer <harald@...ib.org>
Subject: [PATCHv2 3/5] arm64: dts: allwinner: a64: add simplefb for A64 SoC

The A64 SoC features two display pipelines, one has a LCD output, the
other has a HDMI output.

Add support for simplefb for the LCD output. Tested on Teres I.

This patch was inspired by work of Icenowy Zheng.

Signed-off-by: Harald Geyer <harald@...ib.org>
---
changes since v1: none

 arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
index 8401e7f887ff..1b2ef28c42bd 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
+++ b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
@@ -52,6 +52,26 @@
 	#address-cells = <1>;
 	#size-cells = <1>;
 
+	chosen {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+
+/*
+ * The pipeline mixer0-lcd0 depends on clock CLK_MIXER0 from DE2 CCU.
+ * However there is no support for this clock on A64 yet, so we depend
+ * on the upstream clocks here to keep them (and thus CLK_MIXER0) up.
+ */
+		simplefb_lcd: framebuffer-lcd {
+			compatible = "allwinner,simple-framebuffer",
+				     "simple-framebuffer";
+			allwinner,pipeline = "mixer0-lcd0";
+			clocks = <&ccu CLK_TCON0>,
+				 <&ccu CLK_DE>, <&ccu CLK_BUS_DE>;
+			status = "disabled";
+		};
+	};
+
 	cpus {
 		#address-cells = <1>;
 		#size-cells = <0>;
-- 
2.11.0