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Subject[PATCH 2/3] arm64: dts: uniphier: add CPU clock and OPP table for LD11 SoC
Date
Add a CPU clock to every CPU node and a CPU OPP table to use the
generic cpufreq driver.

Note:
clock-latency-ns (300ns) was calculated based on the CPU-gear switch
sequencer spec; it takes 12 clock cycles on the sequencer running
at 50 MHz, plus a bit additional latency.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
---

arch/arm64/boot/dts/socionext/uniphier-ld11.dtsi | 38 ++++++++++++++++++++++++
1 file changed, 38 insertions(+)

diff --git a/arch/arm64/boot/dts/socionext/uniphier-ld11.dtsi b/arch/arm64/boot/dts/socionext/uniphier-ld11.dtsi
index 73e0acf..e3eb10f 100644
--- a/arch/arm64/boot/dts/socionext/uniphier-ld11.dtsi
+++ b/arch/arm64/boot/dts/socionext/uniphier-ld11.dtsi
@@ -70,14 +70,18 @@
device_type = "cpu";
compatible = "arm,cortex-a53", "arm,armv8";
reg = <0 0x000>;
+ clocks = <&sys_clk 33>;
enable-method = "psci";
+ operating-points-v2 = <&cluster0_opp>;
};

cpu1: cpu@1 {
device_type = "cpu";
compatible = "arm,cortex-a53", "arm,armv8";
reg = <0 0x001>;
+ clocks = <&sys_clk 33>;
enable-method = "psci";
+ operating-points-v2 = <&cluster0_opp>;
};
};

@@ -86,6 +90,40 @@
method = "smc";
};

+ cluster0_opp: opp_table {
+ compatible = "operating-points-v2";
+ opp-shared;
+
+ opp@245000000 {
+ opp-hz = /bits/ 64 <245000000>;
+ clock-latency-ns = <300>;
+ };
+ opp@250000000 {
+ opp-hz = /bits/ 64 <250000000>;
+ clock-latency-ns = <300>;
+ };
+ opp@490000000 {
+ opp-hz = /bits/ 64 <490000000>;
+ clock-latency-ns = <300>;
+ };
+ opp@500000000 {
+ opp-hz = /bits/ 64 <500000000>;
+ clock-latency-ns = <300>;
+ };
+ opp@653333333 {
+ opp-hz = /bits/ 64 <653334000>;
+ clock-latency-ns = <300>;
+ };
+ opp@666666666 {
+ opp-hz = /bits/ 64 <666667000>;
+ clock-latency-ns = <300>;
+ };
+ opp@980000000 {
+ opp-hz = /bits/ 64 <980000000>;
+ clock-latency-ns = <300>;
+ };
+ };
+
clocks {
refclk: ref {
compatible = "fixed-clock";
--
1.9.1
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