linux-kernel - [PATCH v2 1/2] arm64: dts: uniphier: add CPU clock and OPP table for LD11 SoC

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Message-Id: <1476926126-6079-1-git-send-email-yamada.masahiro@socionext.com>
Date:   Thu, 20 Oct 2016 10:15:25 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     linux-arm-kernel@...ts.infradead.org
Cc:     Viresh Kumar <viresh.kumar@...aro.org>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Rob Herring <robh+dt@...nel.org>,
        Will Deacon <will.deacon@....com>,
        Mark Rutland <mark.rutland@....com>,
        Catalin Marinas <catalin.marinas@....com>
Subject: [PATCH v2 1/2] arm64: dts: uniphier: add CPU clock and OPP table for LD11 SoC

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@...ionext.com>
---

Changes in v2:
  - Match the node name to the opp-hz property.

 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..bb05f0a 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@...000000 {
+			opp-hz = /bits/ 64 <245000000>;
+			clock-latency-ns = <300>;
+		};
+		opp@...000000 {
+			opp-hz = /bits/ 64 <250000000>;
+			clock-latency-ns = <300>;
+		};
+		opp@...000000 {
+			opp-hz = /bits/ 64 <490000000>;
+			clock-latency-ns = <300>;
+		};
+		opp@...000000 {
+			opp-hz = /bits/ 64 <500000000>;
+			clock-latency-ns = <300>;
+		};
+		opp@...334000 {
+			opp-hz = /bits/ 64 <653334000>;
+			clock-latency-ns = <300>;
+		};
+		opp@...667000 {
+			opp-hz = /bits/ 64 <666667000>;
+			clock-latency-ns = <300>;
+		};
+		opp@...000000 {
+			opp-hz = /bits/ 64 <980000000>;
+			clock-latency-ns = <300>;
+		};
+	};
+
 	clocks {
 		refclk: ref {
 			compatible = "fixed-clock";
-- 
1.9.1