arm64: allwinner: a64: add r_ccu node

A64 SoC have a CCU (r_ccu) in PRCM block.

Add the device node for it.

The mux 3 of R_CCU is an internal oscillator, which is 16MHz according
to the user manual, and has only 30% accuracy based on our experience
on older SoCs. The real mesaured value of it on two Pine64 boards is
around 11MHz, which is around 70% of 16MHz.

Signed-off-by: Icenowy Zheng <icenowy@aosc.xyz>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
index 1c64ea2..1d4e5bc 100644 (file)
--- a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
+++ b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
@@ -98,6 +98,14 @@
                clock-output-names = "osc32k";
        };
 
+       iosc: internal-osc-clk {
+               #clock-cells = <0>;
+               compatible = "fixed-clock";
+               clock-frequency = <16000000>;
+               clock-accuracy = <300000000>;
+               clock-output-names = "iosc";
+       };
+
        psci {
                compatible = "arm,psci-0.2";
                method = "smc";
@@ -392,5 +400,14 @@
                        interrupts = <GIC_SPI 40 IRQ_TYPE_LEVEL_HIGH>,
                                     <GIC_SPI 41 IRQ_TYPE_LEVEL_HIGH>;
                };
+
+               r_ccu: clock@1f01400 {
+                       compatible = "allwinner,sun50i-a64-r-ccu";
+                       reg = <0x01f01400 0x100>;
+                       clocks = <&osc24M>, <&osc32k>, <&iosc>;
+                       clock-names = "hosc", "losc", "iosc";
+                       #clock-cells = <1>;
+                       #reset-cells = <1>;
+               };
        };
 };