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@ccbib.org>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
index 8401e7f887ffd260d7fc698e66c8c65b01d5604d..1b2ef28c42bd1eaf2c37557b2b27d90ff1d86d8c 100644 (file)
--- 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>;