[PATCH 1/2][SRU][HIRSUTE][RISCV] Revert "SiFive Unleashed CPUFreq"

[Colin King]

From: Colin Ian King <colin.king at canonical.com>

The SiFive Unleashed CPU frequency is known to be unreliabe especially
when using the latest device tree and the default Ubuntu CPU frequency
schedule settings. Revert the CPU Frequency commit for now until we
get a suitable upstream fix that works more reliably with our default
Ubuntu configs.

BugLink: https://bugs.launchpad.net/bugs/1917433

This reverts commit 3949df6ecdca04339bc8a3925c2ba7f881cf82b1.
---
 arch/riscv/Kconfig                            |  8 -----
 arch/riscv/boot/dts/sifive/fu540-c000.dtsi    |  5 ---
 .../boot/dts/sifive/hifive-unleashed-a00.dts  | 34 -------------------
 arch/riscv/configs/defconfig                  |  5 ---
 4 files changed, 52 deletions(-)

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index b0a7a37b2ae1..3230c1d48562 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -396,14 +396,6 @@ config BUILTIN_DTB
 	depends on RISCV_M_MODE
 	depends on OF
 
-menu "CPU Power Management"
-
-source "drivers/cpuidle/Kconfig"
-
-source "drivers/cpufreq/Kconfig"
-
-endmenu
-
 menu "Power management options"
 
 source "kernel/power/Kconfig"
diff --git a/arch/riscv/boot/dts/sifive/fu540-c000.dtsi b/arch/riscv/boot/dts/sifive/fu540-c000.dtsi
index 023a8fd14cf6..7db861053483 100644
--- a/arch/riscv/boot/dts/sifive/fu540-c000.dtsi
+++ b/arch/riscv/boot/dts/sifive/fu540-c000.dtsi
@@ -30,7 +30,6 @@ cpu0: cpu at 0 {
 			i-cache-size = <16384>;
 			reg = <0>;
 			riscv,isa = "rv64imac";
-			clocks = <&prci PRCI_CLK_COREPLL>;
 			status = "disabled";
 			cpu0_intc: interrupt-controller {
 				#interrupt-cells = <1>;
@@ -55,7 +54,6 @@ cpu1: cpu at 1 {
 			reg = <1>;
 			riscv,isa = "rv64imafdc";
 			tlb-split;
-			clocks = <&prci PRCI_CLK_COREPLL>;
 			next-level-cache = <&l2cache>;
 			cpu1_intc: interrupt-controller {
 				#interrupt-cells = <1>;
@@ -80,7 +78,6 @@ cpu2: cpu at 2 {
 			reg = <2>;
 			riscv,isa = "rv64imafdc";
 			tlb-split;
-			clocks = <&prci PRCI_CLK_COREPLL>;
 			next-level-cache = <&l2cache>;
 			cpu2_intc: interrupt-controller {
 				#interrupt-cells = <1>;
@@ -105,7 +102,6 @@ cpu3: cpu at 3 {
 			reg = <3>;
 			riscv,isa = "rv64imafdc";
 			tlb-split;
-			clocks = <&prci PRCI_CLK_COREPLL>;
 			next-level-cache = <&l2cache>;
 			cpu3_intc: interrupt-controller {
 				#interrupt-cells = <1>;
@@ -130,7 +126,6 @@ cpu4: cpu at 4 {
 			reg = <4>;
 			riscv,isa = "rv64imafdc";
 			tlb-split;
-			clocks = <&prci PRCI_CLK_COREPLL>;
 			next-level-cache = <&l2cache>;
 			cpu4_intc: interrupt-controller {
 				#interrupt-cells = <1>;
diff --git a/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts b/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts
index c8a47bf32f04..9bafe4673cca 100644
--- a/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts
+++ b/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts
@@ -78,40 +78,6 @@ gpio-restart {
 		compatible = "gpio-restart";
 		gpios = <&gpio 10 GPIO_ACTIVE_LOW>;
 	};
-
-	fu540_c000_opp_table: opp-table {
-		compatible = "operating-points-v2";
-		opp-shared;
-
-		opp-350000000 {
-			opp-hz = /bits/ 64 <350000000>;
-		};
-		opp-700000000 {
-			opp-hz = /bits/ 64 <700000000>;
-		};
-		opp-999999999 {
-			opp-hz = /bits/ 64 <999999999>;
-		};
-		opp-1400000000 {
-			opp-hz = /bits/ 64 <1400000000>;
-		};
-	};
-};
-
-&cpu0 {
-	operating-points-v2 = <&fu540_c000_opp_table>;
-};
-&cpu1 {
-	operating-points-v2 = <&fu540_c000_opp_table>;
-};
-&cpu2 {
-	operating-points-v2 = <&fu540_c000_opp_table>;
-};
-&cpu3 {
-	operating-points-v2 = <&fu540_c000_opp_table>;
-};
-&cpu4 {
-	operating-points-v2 = <&fu540_c000_opp_table>;
 };
 
 &uart0 {
diff --git a/arch/riscv/configs/defconfig b/arch/riscv/configs/defconfig
index 58f4bce82d91..4da4886246a4 100644
--- a/arch/riscv/configs/defconfig
+++ b/arch/riscv/configs/defconfig
@@ -17,11 +17,6 @@ CONFIG_BPF_SYSCALL=y
 CONFIG_SOC_SIFIVE=y
 CONFIG_SOC_VIRT=y
 CONFIG_SMP=y
-CONFIG_CPU_IDLE=y
-CONFIG_CPU_FREQ=y
-CONFIG_CPU_FREQ_STAT=y
-CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE=y
-CONFIG_CPUFREQ_DT=y
 CONFIG_MODULES=y
 CONFIG_MODULE_UNLOAD=y
 CONFIG_NET=y
-- 
2.29.2