From mboxrd@z Thu Jan 1 00:00:00 1970 From: Anson Huang Subject: [PATCH 1/2] ARM: dts: imx7s: enable cpuidle driver Date: Wed, 29 Aug 2018 13:00:46 +0800 Message-ID: <1535518847-24417-1-git-send-email-Anson.Huang@nxp.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: Sender: linux-kernel-owner@vger.kernel.org To: shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, fabio.estevam@nxp.com, robh+dt@kernel.org, mark.rutland@arm.com, linux@armlinux.org.uk, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Linux-imx@nxp.com List-Id: devicetree@vger.kernel.org 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 --- 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