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[PATCH v4 3/5] arm64: allwinner: a64: add r_ccu node

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From: Icenowy Zheng <icenowy@aosc.xyz>

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>
---
Changes in v4:
- Temporarily dropped the CCU headers.
Changes in v3:
- Change osc32000 to iosc, which is 16MHz plus minus 30%, according to the
  RTC chapter of the user manual and our experiences on A33.
Changes in v2:
- Add osc32000.

 arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
index 1c64ea2d23f9..1d4e5bcced0c 100644
--- 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>;
+		};
 	};
 };
-- 
2.12.2

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[PATCH v4 0/5] Add support for the R_CCU on Allwinner H3/A64 SoCs Icenowy Zheng <icenowy@aosc.io> - 2017-04-04 12:00 +0200
  [PATCH v4 1/5] dt-bindings: update device tree binding for Allwinner PRCM CCUs Icenowy Zheng <icenowy@aosc.io> - 2017-04-04 12:00 +0200
  [PATCH v4 2/5] clk: sunxi-ng: add support for PRCM CCUs Icenowy Zheng <icenowy@aosc.io> - 2017-04-04 12:00 +0200
  [PATCH v4 3/5] arm64: allwinner: a64: add r_ccu node Icenowy Zheng <icenowy@aosc.io> - 2017-04-04 12:20 +0200
  [PATCH v4 4/5] ARM: sunxi: h3/h5: switch apb0-related clocks to r_ccu Icenowy Zheng <icenowy@aosc.io> - 2017-04-04 12:40 +0200
  [PATCH v4 5/5] arm64: allwinner: a64: add R_PIO pinctrl node Icenowy Zheng <icenowy@aosc.io> - 2017-04-04 12:50 +0200
  Re: [PATCH v4 0/5] Add support for the R_CCU on Allwinner H3/A64 SoCs Maxime Ripard <maxime.ripard@free-electrons.com> - 2017-04-04 17:50 +0200

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