140 lines
3.7 KiB
Diff
140 lines
3.7 KiB
Diff
From 8120ac611ab6881d6fcf31c1df02d77125434485 Mon Sep 17 00:00:00 2001
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From: Fedora Kernel Team <kernel-team@fedoraproject.org>
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Date: Mon, 6 Jan 2020 16:47:56 +0000
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Subject: [PATCH] SiFive Unleashed CPUFreq
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---
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arch/riscv/Kconfig | 8 +++++
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arch/riscv/boot/dts/sifive/fu540-c000.dtsi | 5 +++
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.../boot/dts/sifive/hifive-unleashed-a00.dts | 34 +++++++++++++++++++
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arch/riscv/configs/defconfig | 5 +++
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4 files changed, 52 insertions(+)
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diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
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index a31169b..06ad604 100644
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--- a/arch/riscv/Kconfig
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+++ b/arch/riscv/Kconfig
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@@ -355,6 +355,14 @@ endchoice
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endmenu
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+menu "CPU Power Management"
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+
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+source "drivers/cpuidle/Kconfig"
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+
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+source "drivers/cpufreq/Kconfig"
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+
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+endmenu
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+
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menu "Power management options"
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source "kernel/power/Kconfig"
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diff --git a/arch/riscv/boot/dts/sifive/fu540-c000.dtsi b/arch/riscv/boot/dts/sifive/fu540-c000.dtsi
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index a2e3d54..a380bc7 100644
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--- a/arch/riscv/boot/dts/sifive/fu540-c000.dtsi
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+++ b/arch/riscv/boot/dts/sifive/fu540-c000.dtsi
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@@ -30,6 +30,7 @@ cpu0: cpu@0 {
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i-cache-size = <16384>;
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reg = <0>;
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riscv,isa = "rv64imac";
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+ clocks = <&prci PRCI_CLK_COREPLL>;
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status = "disabled";
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cpu0_intc: interrupt-controller {
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#interrupt-cells = <1>;
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@@ -54,6 +55,7 @@ cpu1: cpu@1 {
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reg = <1>;
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riscv,isa = "rv64imafdc";
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tlb-split;
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+ clocks = <&prci PRCI_CLK_COREPLL>;
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next-level-cache = <&l2cache>;
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cpu1_intc: interrupt-controller {
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#interrupt-cells = <1>;
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@@ -78,6 +80,7 @@ cpu2: cpu@2 {
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reg = <2>;
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riscv,isa = "rv64imafdc";
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tlb-split;
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+ clocks = <&prci PRCI_CLK_COREPLL>;
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next-level-cache = <&l2cache>;
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cpu2_intc: interrupt-controller {
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#interrupt-cells = <1>;
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@@ -102,6 +105,7 @@ cpu3: cpu@3 {
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reg = <3>;
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riscv,isa = "rv64imafdc";
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tlb-split;
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+ clocks = <&prci PRCI_CLK_COREPLL>;
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next-level-cache = <&l2cache>;
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cpu3_intc: interrupt-controller {
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#interrupt-cells = <1>;
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@@ -126,6 +130,7 @@ cpu4: cpu@4 {
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reg = <4>;
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riscv,isa = "rv64imafdc";
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tlb-split;
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+ clocks = <&prci PRCI_CLK_COREPLL>;
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next-level-cache = <&l2cache>;
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cpu4_intc: interrupt-controller {
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#interrupt-cells = <1>;
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diff --git a/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts b/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts
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index 88cfcb9..e1724e3 100644
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--- a/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts
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+++ b/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts
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@@ -41,6 +41,40 @@ rtcclk: rtcclk {
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clock-frequency = <RTCCLK_FREQ>;
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clock-output-names = "rtcclk";
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};
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+
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+ fu540_c000_opp_table: opp-table {
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+ compatible = "operating-points-v2";
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+ opp-shared;
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+
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+ opp-350000000 {
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+ opp-hz = /bits/ 64 <350000000>;
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+ };
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+ opp-700000000 {
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+ opp-hz = /bits/ 64 <700000000>;
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+ };
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+ opp-999999999 {
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+ opp-hz = /bits/ 64 <999999999>;
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+ };
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+ opp-1400000000 {
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+ opp-hz = /bits/ 64 <1400000000>;
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+ };
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+ };
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+};
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+
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+&cpu0 {
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+ operating-points-v2 = <&fu540_c000_opp_table>;
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+};
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+&cpu1 {
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+ operating-points-v2 = <&fu540_c000_opp_table>;
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+};
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+&cpu2 {
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+ operating-points-v2 = <&fu540_c000_opp_table>;
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+};
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+&cpu3 {
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+ operating-points-v2 = <&fu540_c000_opp_table>;
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+};
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+&cpu4 {
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+ operating-points-v2 = <&fu540_c000_opp_table>;
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};
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&uart0 {
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diff --git a/arch/riscv/configs/defconfig b/arch/riscv/configs/defconfig
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index e2ff95c..a2fb392 100644
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--- a/arch/riscv/configs/defconfig
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+++ b/arch/riscv/configs/defconfig
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@@ -16,6 +16,11 @@ CONFIG_EXPERT=y
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CONFIG_BPF_SYSCALL=y
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CONFIG_SOC_SIFIVE=y
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CONFIG_SMP=y
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+CONFIG_CPU_IDLE=y
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+CONFIG_CPU_FREQ=y
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+CONFIG_CPU_FREQ_STAT=y
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+CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE=y
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+CONFIG_CPUFREQ_DT=y
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CONFIG_MODULES=y
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CONFIG_MODULE_UNLOAD=y
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CONFIG_NET=y
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--
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2.24.1
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