Re: [PATCH 1/2] arm64: dts: r8a7795: Upgrade to PSCI v1.0 to support Suspend-to-RAM
From: Sudeep Holla <hidden>
Date: 2017-02-17 18:06:10
Also in:
linux-arm-kernel, linux-renesas-soc
On 17/02/17 17:00, Geert Uytterhoeven wrote:
From: Khiem Nguyen <redacted> From PSCI v1.0, Suspend-to-RAM is supported via SYSTEM_SUSPEND PSCI function call. Hence, upgrade PSCI version for R-Car H3 to support Suspend-to-RAM. The Suspend-to-RAM is highly dependent on ARM Trusted Firwmare support since necessary callback functions will be registered after a query to ARM Trusted Firmware about SYSTEM_SUSPEND support. Since PSCI v1.0 is backward compatible with PSCI v0.2, CPU Hotplug and CPUIdle should be able to work normally with this change.
Why not retain "arm,psci-0.2" and just add "arm,psci-1.0" so that you can continue to run older kernel without PSCI v1.0 or system suspend support in case you need to backward compatible with older/stable kernel versions.
quoted hunk ↗ jump to hunk
Signed-off-by: Khiem Nguyen <redacted> Signed-off-by: Takeshi Kihara <redacted> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> --- Khiem: I've updated your email address. --- arch/arm64/boot/dts/renesas/r8a7795.dtsi | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)diff --git a/arch/arm64/boot/dts/renesas/r8a7795.dtsi b/arch/arm64/boot/dts/renesas/r8a7795.dtsi index 98cd42f586b5fd62..4eae2d471d41ee55 100644 --- a/arch/arm64/boot/dts/renesas/r8a7795.dtsi +++ b/arch/arm64/boot/dts/renesas/r8a7795.dtsi@@ -29,7 +29,7 @@ }; psci { - compatible = "arm,psci-0.2"; + compatible = "arm,psci-1.0"; method = "smc"; };
-- Regards, Sudeep