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feat(morello): add cpuidle support

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This patch adds necessary device-tree idle state definitions and enables
relevant platform makefile options.

Co-authored-by: Karl Meakin <karl.meakin@arm.com>
Signed-off-by: sahil <sahil@arm.com>
Change-Id: Iaf95867095f0514ec3994b9c9efd9756ed49ef43
This commit is contained in:
sahil 2023-05-25 13:47:13 +05:30
parent b692edf8bf
commit 4f7330dc78
3 changed files with 64 additions and 1 deletions
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32
fdts/morello-fvp.dts
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2020-2022, Arm Limited. All rights reserved.
* Copyright (c) 2020-2023, Arm Limited. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@ -25,6 +25,32 @@
};
};
/*
* The timings below are just to demonstrate working cpuidle.
* These values may be inaccurate.
*/
idle-states {
entry-method = "psci";
cluster_sleep: cluster-sleep {
compatible = "arm,idle-state";
arm,psci-suspend-param = <0x40000022>;
local-timer-stop;
entry-latency-us = <500>;
exit-latency-us = <1000>;
min-residency-us = <2500>;
};
cpu_sleep: cpu-sleep {
compatible = "arm,idle-state";
arm,psci-suspend-param = <0x40000002>;
local-timer-stop;
entry-latency-us = <150>;
exit-latency-us = <300>;
min-residency-us = <200>;
};
};
cpus {
#address-cells = <2>;
#size-cells = <0>;
@ -53,6 +79,7 @@
device_type = "cpu";
enable-method = "psci";
clocks = <&scmi_dvfs 0>;
cpu-idle-states = <&cpu_sleep &cluster_sleep>;
};
CPU1: cpu1@100 {
compatible = "arm,armv8";
@ -60,6 +87,7 @@
device_type = "cpu";
enable-method = "psci";
clocks = <&scmi_dvfs 0>;
cpu-idle-states = <&cpu_sleep &cluster_sleep>;
};
CPU2: cpu2@10000 {
compatible = "arm,armv8";
@ -67,6 +95,7 @@
device_type = "cpu";
enable-method = "psci";
clocks = <&scmi_dvfs 1>;
cpu-idle-states = <&cpu_sleep &cluster_sleep>;
};
CPU3: cpu3@10100 {
compatible = "arm,armv8";
@ -74,6 +103,7 @@
device_type = "cpu";
enable-method = "psci";
clocks = <&scmi_dvfs 1>;
cpu-idle-states = <&cpu_sleep &cluster_sleep>;
};
};

30
fdts/morello-soc.dts
View file

@ -26,6 +26,32 @@
};
};
/*
* The timings below are just to demonstrate working cpuidle.
* These values may be inaccurate.
*/
idle-states {
entry-method = "psci";
cluster_sleep: cluster-sleep {
compatible = "arm,idle-state";
arm,psci-suspend-param = <0x40000022>;
local-timer-stop;
entry-latency-us = <500>;
exit-latency-us = <1000>;
min-residency-us = <2500>;
};
cpu_sleep: cpu-sleep {
compatible = "arm,idle-state";
arm,psci-suspend-param = <0x40000002>;
local-timer-stop;
entry-latency-us = <150>;
exit-latency-us = <300>;
min-residency-us = <200>;
};
};
cpus {
#address-cells = <2>;
#size-cells = <0>;
@ -44,6 +70,7 @@
1800000 750000
>;
#cooling-cells = <2>;
cpu-idle-states = <&cpu_sleep &cluster_sleep>;
};
cpu1: cpu1@100 {
compatible = "arm,armv8";
@ -60,6 +87,7 @@
1800000 750000
>;
#cooling-cells = <2>;
cpu-idle-states = <&cpu_sleep &cluster_sleep>;
};
cpu2: cpu2@10000 {
compatible = "arm,armv8";
@ -76,6 +104,7 @@
1800000 750000
>;
#cooling-cells = <2>;
cpu-idle-states = <&cpu_sleep &cluster_sleep>;
};
cpu3: cpu3@10100 {
compatible = "arm,armv8";
@ -92,6 +121,7 @@
1800000 750000
>;
#cooling-cells = <2>;
cpu-idle-states = <&cpu_sleep &cluster_sleep>;
};
};

3
plat/arm/board/morello/platform.mk
View file

@ -89,6 +89,9 @@ override ARM_PLAT_MT := 1
override ARM_BL31_IN_DRAM := 1
override PSCI_EXTENDED_STATE_ID := 1
override ARM_RECOM_STATE_ID_ENC := 1
# Errata workarounds:
ERRATA_N1_1868343 := 1