lkml.org 
[lkml]   [2018]   [Aug]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 1/2] ARM: dts: imx7s: enable cpuidle driver
Date
Enable cpuidle for i.MX7S/D using generic ARM cpuidle
driver, below 2 idle states enabled:

1. ARM WFI;
2. SoC WAIT mode.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
---
arch/arm/boot/dts/imx7d.dtsi | 1 +
arch/arm/boot/dts/imx7s.dtsi | 14 ++++++++++++++
2 files changed, 15 insertions(+)

diff --git a/arch/arm/boot/dts/imx7d.dtsi b/arch/arm/boot/dts/imx7d.dtsi
index 7cbc2ff..4d0d0f6 100644
--- a/arch/arm/boot/dts/imx7d.dtsi
+++ b/arch/arm/boot/dts/imx7d.dtsi
@@ -20,6 +20,7 @@
reg = <1>;
clock-frequency = <996000000>;
operating-points-v2 = <&cpu0_opp_table>;
+ cpu-idle-states = <&CPU_SLEEP>;
};
};

diff --git a/arch/arm/boot/dts/imx7s.dtsi b/arch/arm/boot/dts/imx7s.dtsi
index 93884ce..cf5570b 100644
--- a/arch/arm/boot/dts/imx7s.dtsi
+++ b/arch/arm/boot/dts/imx7s.dtsi
@@ -54,6 +54,19 @@
#address-cells = <1>;
#size-cells = <0>;

+ idle-states {
+ entry-method = "psci";
+
+ CPU_SLEEP: WAIT {
+ compatible = "arm,idle-state";
+ arm,psci-suspend-param = <0x0010000>;
+ local-timer-stop;
+ entry-latency-us = <100>;
+ exit-latency-us = <50>;
+ min-residency-us = <1000>;
+ };
+ };
+
cpu0: cpu@0 {
compatible = "arm,cortex-a7";
device_type = "cpu";
@@ -61,6 +74,7 @@
clock-frequency = <792000000>;
clock-latency = <61036>; /* two CLK32 periods */
clocks = <&clks IMX7D_CLK_ARM>;
+ cpu-idle-states = <&CPU_SLEEP>;
};
};

--
2.7.4
\
 
 \ /
  Last update: 2018-08-29 07:07    [W:5.606 / U:0.008 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site