[PATCH 0/2] ARM: dts: am33xx/am4372: Add cpuidle dt states

[PATCH 0/2] ARM: dts: am33xx/am4372: Add cpuidle dt states

[Dave Gerlach]

Hi,
This series adds DT idle states for TI am33xx and am4372 platforms.
The mpu_gate is added for both platforms which gates the MPU clock
to save power during idle. It depends on the driver series sent
here [1].

Regards,
Dave

[1] https://marc.info/?l=linux-kernel&m=157620644400324&w=2

Dave Gerlach (2):
  ARM: dts: am33xx: Add idle_states for cpuidle
  ARM: dts: am4372: Add idle_states for cpuidle

 arch/arm/boot/dts/am33xx.dtsi | 12 ++++++++++++
 arch/arm/boot/dts/am4372.dtsi | 12 ++++++++++++
 2 files changed, 24 insertions(+)

-- 
2.20.1

[PATCH 1/2] ARM: dts: am33xx: Add idle_states for cpuidle

[Dave Gerlach]

Add idle_states table for CPU on am335x. Currently just add C1 state
which gates the MPU clock domain.

Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
---
 arch/arm/boot/dts/am33xx.dtsi | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/arm/boot/dts/am33xx.dtsi b/arch/arm/boot/dts/am33xx.dtsi
index 646f11430dad..66d102efa93f 100644
--- a/arch/arm/boot/dts/am33xx.dtsi
+++ b/arch/arm/boot/dts/am33xx.dtsi
@@ -47,6 +47,7 @@
 		#size-cells = <0>;
 		cpu@0 {
 			compatible = "arm,cortex-a8";
+			enable-method = "ti,am3352";
 			device_type = "cpu";
 			reg = <0>;
 
@@ -56,6 +57,17 @@
 			clock-names = "cpu";
 
 			clock-latency = <300000>; /* From omap-cpufreq driver */
+			cpu-idle-states = <&mpu_gate>;
+		};
+
+		idle-states {
+			mpu_gate: mpu_gate {
+				compatible = "arm,idle-state";
+				entry-latency-us = <40>;
+				exit-latency-us = <90>;
+				min-residency-us = <300>;
+				ti,idle-wkup-m3;
+			};
 		};
 	};
 
-- 
2.20.1

[PATCH 2/2] ARM: dts: am4372: Add idle_states for cpuidle

[Dave Gerlach]

Add idle_states table for CPU on am437x. Currently just add C1 state
which gates the MPU clock domain.

Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
---
 arch/arm/boot/dts/am4372.dtsi | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/arm/boot/dts/am4372.dtsi b/arch/arm/boot/dts/am4372.dtsi
index ca0aa3f26c0a..71ff2bf68d56 100644
--- a/arch/arm/boot/dts/am4372.dtsi
+++ b/arch/arm/boot/dts/am4372.dtsi
@@ -45,6 +45,7 @@
 		#size-cells = <0>;
 		cpu: cpu@0 {
 			compatible = "arm,cortex-a9";
+			enable-method = "ti,am4372";
 			device_type = "cpu";
 			reg = <0>;
 
@@ -54,6 +55,17 @@
 			operating-points-v2 = <&cpu0_opp_table>;
 
 			clock-latency = <300000>; /* From omap-cpufreq driver */
+			cpu-idle-states = <&mpu_gate>;
+		};
+
+		idle-states {
+			mpu_gate: mpu_gate {
+				compatible = "arm,idle-state";
+				entry-latency-us = <40>;
+				exit-latency-us = <100>;
+				min-residency-us = <300>;
+				local-timer-stop;
+			};
 		};
 	};
 
-- 
2.20.1

Re: [PATCH 0/2] ARM: dts: am33xx/am4372: Add cpuidle dt states

[Tony Lindgren]

* Dave Gerlach <d-gerlach@ti.com> [191212 20:16]:
> Hi,
> This series adds DT idle states for TI am33xx and am4372 platforms.
> The mpu_gate is added for both platforms which gates the MPU clock
> to save power during idle. It depends on the driver series sent
> here [1].
> 
> Regards,
> Dave
> 
> [1] https://marc.info/?l=linux-kernel&m=157620644400324&w=2

Thanks applying into omap-for-v5.7/dt.

Regards,

Tony