* [RFC] ARM: dts: mt8173: Add psci-0.2 cpuidle support
@ 2015-03-18 6:00 Howard Chen
2015-03-18 12:16 ` Mark Rutland
0 siblings, 1 reply; 2+ messages in thread
From: Howard Chen @ 2015-03-18 6:00 UTC (permalink / raw)
To: linux-arm-kernel
add device tree for psci-0.2 on mt8173 platform
add device tree for cupidle-arm64 on mt8173 platform
Signed-off-by: Howard Chen <howard.chen@linaro.org>
---
arch/arm64/boot/dts/mediatek/mt8173.dtsi | 30 ++++++++++++++++++++++++++----
1 file changed, 26 insertions(+), 4 deletions(-)
diff --git a/arch/arm64/boot/dts/mediatek/mt8173.dtsi b/arch/arm64/boot/dts/mediatek/mt8173.dtsi
index 8554ec3..96dff1e 100644
--- a/arch/arm64/boot/dts/mediatek/mt8173.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8173.dtsi
@@ -48,6 +48,8 @@
device_type = "cpu";
compatible = "arm,cortex-a53";
reg = <0x000>;
+ enable-method = "psci";
+ cpu-idle-states = <&CPU_SLEEP_0_0 &CLUSTER_SLEEP_0>;
};
cpu1: cpu at 1 {
@@ -55,6 +57,7 @@
compatible = "arm,cortex-a53";
reg = <0x001>;
enable-method = "psci";
+ cpu-idle-states = <&CPU_SLEEP_0_0 &CLUSTER_SLEEP_0>;
};
cpu2: cpu at 100 {
@@ -62,6 +65,7 @@
compatible = "arm,cortex-a57";
reg = <0x100>;
enable-method = "psci";
+ cpu-idle-states = <&CPU_SLEEP_0_0 &CLUSTER_SLEEP_0>;
};
cpu3: cpu at 101 {
@@ -69,15 +73,33 @@
compatible = "arm,cortex-a57";
reg = <0x101>;
enable-method = "psci";
+ cpu-idle-states = <&CPU_SLEEP_0_0 &CLUSTER_SLEEP_0>;
};
+
+ idle-states {
+ entry-method = "arm,psci-0.2";
+
+ CPU_SLEEP_0_0: cpu-sleep-0-0 {
+ compatible = "arm,idle-state";
+ arm,psci-suspend-param = <0x0010000>;
+ entry-latency-us = <600>;
+ exit-latency-us = <600>;
+ min-residency-us = <1200>;
+ };
+
+ CLUSTER_SLEEP_0: cluster-sleep-0 {
+ compatible = "arm,idle-state";
+ arm,psci-suspend-param = <0x1010000>;
+ entry-latency-us = <800>;
+ exit-latency-us = <1000>;
+ min-residency-us = <2000>;
+ wakeup-latency-us = <1000>;
+ };
};
psci {
- compatible = "arm,psci";
+ compatible = "arm,psci-0.2";
method = "smc";
- cpu_suspend = <0x84000001>;
- cpu_off = <0x84000002>;
- cpu_on = <0x84000003>;
};
uart_clk: dummy26m {
--
1.9.1
^ permalink raw reply related [flat|nested] 2+ messages in thread* [RFC] ARM: dts: mt8173: Add psci-0.2 cpuidle support
2015-03-18 6:00 [RFC] ARM: dts: mt8173: Add psci-0.2 cpuidle support Howard Chen
@ 2015-03-18 12:16 ` Mark Rutland
0 siblings, 0 replies; 2+ messages in thread
From: Mark Rutland @ 2015-03-18 12:16 UTC (permalink / raw)
To: linux-arm-kernel
Hi,
On Wed, Mar 18, 2015 at 06:00:32AM +0000, Howard Chen wrote:
> add device tree for psci-0.2 on mt8173 platform
Are all the other mandatory PSCI 0.2 components implemented and working?
e.g. is MIGRATE_INFO_TYPE present, do SYSTEM_{OFF,RESET} work?
If they're not present and working, we can't describe this as having
PSCI 0.2.
Also, what FW does this require the system to have?
Mark.
> add device tree for cupidle-arm64 on mt8173 platform
>
> Signed-off-by: Howard Chen <howard.chen@linaro.org>
> ---
> arch/arm64/boot/dts/mediatek/mt8173.dtsi | 30 ++++++++++++++++++++++++++----
> 1 file changed, 26 insertions(+), 4 deletions(-)
>
> diff --git a/arch/arm64/boot/dts/mediatek/mt8173.dtsi b/arch/arm64/boot/dts/mediatek/mt8173.dtsi
> index 8554ec3..96dff1e 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8173.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8173.dtsi
> @@ -48,6 +48,8 @@
> device_type = "cpu";
> compatible = "arm,cortex-a53";
> reg = <0x000>;
> + enable-method = "psci";
> + cpu-idle-states = <&CPU_SLEEP_0_0 &CLUSTER_SLEEP_0>;
> };
>
> cpu1: cpu at 1 {
> @@ -55,6 +57,7 @@
> compatible = "arm,cortex-a53";
> reg = <0x001>;
> enable-method = "psci";
> + cpu-idle-states = <&CPU_SLEEP_0_0 &CLUSTER_SLEEP_0>;
> };
>
> cpu2: cpu at 100 {
> @@ -62,6 +65,7 @@
> compatible = "arm,cortex-a57";
> reg = <0x100>;
> enable-method = "psci";
> + cpu-idle-states = <&CPU_SLEEP_0_0 &CLUSTER_SLEEP_0>;
> };
>
> cpu3: cpu at 101 {
> @@ -69,15 +73,33 @@
> compatible = "arm,cortex-a57";
> reg = <0x101>;
> enable-method = "psci";
> + cpu-idle-states = <&CPU_SLEEP_0_0 &CLUSTER_SLEEP_0>;
> };
> +
> + idle-states {
> + entry-method = "arm,psci-0.2";
> +
> + CPU_SLEEP_0_0: cpu-sleep-0-0 {
> + compatible = "arm,idle-state";
> + arm,psci-suspend-param = <0x0010000>;
> + entry-latency-us = <600>;
> + exit-latency-us = <600>;
> + min-residency-us = <1200>;
> + };
> +
> + CLUSTER_SLEEP_0: cluster-sleep-0 {
> + compatible = "arm,idle-state";
> + arm,psci-suspend-param = <0x1010000>;
> + entry-latency-us = <800>;
> + exit-latency-us = <1000>;
> + min-residency-us = <2000>;
> + wakeup-latency-us = <1000>;
> + };
> };
>
> psci {
> - compatible = "arm,psci";
> + compatible = "arm,psci-0.2";
> method = "smc";
> - cpu_suspend = <0x84000001>;
> - cpu_off = <0x84000002>;
> - cpu_on = <0x84000003>;
> };
>
> uart_clk: dummy26m {
> --
> 1.9.1
>
>
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