[PATCH 18/32] arm64: dts: r8a7795: Upgrade to PSCI v1.0 to support Suspend-to-RAM

Simon Horman horms+renesas at verge.net.au
Mon Mar 20 01:57:29 PDT 2017

From: Khiem Nguyen <khiem.nguyen.xt at renesas.com>

>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

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.

Signed-off-by: Khiem Nguyen <khiem.nguyen.xt at renesas.com>
Signed-off-by: Takeshi Kihara <takeshi.kihara.df at renesas.com>
[geert: Keep "arm,psci-0.2"]
Signed-off-by: Geert Uytterhoeven <geert+renesas at glider.be>
Signed-off-by: Simon Horman <horms+renesas at verge.net.au>
 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 3573872974e0..c1e00a3e7c45 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", "arm,psci-0.2";
 		method = "smc";

More information about the linux-arm-kernel mailing list