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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>
This commit is contained in:
Icenowy Zheng 2017-04-04 17:50:58 +08:00 committed by Maxime Ripard
parent c1ae3cfa0e
commit 791a9e001d
1 changed files with 17 additions and 0 deletions
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17
arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
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@ -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>;
};
};
};