From: Shawn Guo <shawnguo@kernel.org>
To: Ran Wang <ran.wang_1@nxp.com>,
Bhaskar Upadhaya <bhaskar.upadhaya@nxp.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
Li Yang <leoyang.li@nxp.com>, Rob Herring <robh+dt@kernel.org>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2] arm64: dts: ls1028a: Fix CPU idle fail.
Date: Thu, 23 May 2019 16:51:04 +0800 [thread overview]
Message-ID: <20190523085104.GP9261@dragon> (raw)
In-Reply-To: <20190517045753.3709-1-ran.wang_1@nxp.com>
On Fri, May 17, 2019 at 12:57:53PM +0800, Ran Wang wrote:
> PSCI spec define 1st parameter's bit 16 of function CPU_SUSPEND to
> indicate CPU State Type: 0 for standby, 1 for power down. In this
> case, we want to select standby for CPU idle feature. But current
> setting wrongly select power down and cause CPU SUSPEND fail every
> time. Need this fix.
>
> Fixes: 8897f3255c9c ("arm64: dts: Add support for NXP LS1028A SoC")
> Signed-off-by: Ran Wang <ran.wang_1@nxp.com>
Leo, Bhaskar,
Do you guys agree with it?
Shawn
> ---
> arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi | 18 +++++++++---------
> 1 files changed, 9 insertions(+), 9 deletions(-)
>
> diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi b/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi
> index b045812..bf7f845 100644
> --- a/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi
> +++ b/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi
> @@ -28,7 +28,7 @@
> enable-method = "psci";
> clocks = <&clockgen 1 0>;
> next-level-cache = <&l2>;
> - cpu-idle-states = <&CPU_PH20>;
> + cpu-idle-states = <&CPU_PW20>;
> };
>
> cpu1: cpu@1 {
> @@ -38,7 +38,7 @@
> enable-method = "psci";
> clocks = <&clockgen 1 0>;
> next-level-cache = <&l2>;
> - cpu-idle-states = <&CPU_PH20>;
> + cpu-idle-states = <&CPU_PW20>;
> };
>
> l2: l2-cache {
> @@ -53,13 +53,13 @@
> */
> entry-method = "arm,psci";
>
> - CPU_PH20: cpu-ph20 {
> - compatible = "arm,idle-state";
> - idle-state-name = "PH20";
> - arm,psci-suspend-param = <0x00010000>;
> - entry-latency-us = <1000>;
> - exit-latency-us = <1000>;
> - min-residency-us = <3000>;
> + CPU_PW20: cpu-pw20 {
> + compatible = "arm,idle-state";
> + idle-state-name = "PW20";
> + arm,psci-suspend-param = <0x0>;
> + entry-latency-us = <2000>;
> + exit-latency-us = <2000>;
> + min-residency-us = <6000>;
> };
> };
>
> --
> 1.7.1
>
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next prev parent reply other threads:[~2019-05-23 8:52 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-17 4:57 [PATCH v2] arm64: dts: ls1028a: Fix CPU idle fail Ran Wang
2019-05-23 8:51 ` Shawn Guo [this message]
2019-06-11 17:40 ` Li Yang
2019-06-12 5:58 ` Shawn Guo
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