| Message ID | 1403705421-17597-9-git-send-email-lorenzo.pieralisi@arm.com (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
Hi Lorenzo, On Wed, Jun 25, 2014 at 03:10:21PM +0100, Lorenzo Pieralisi wrote: > This patch updates the RTSM dts file with PSCI bindings and nodes > describing the AEMv8 model idle states parameters. > > Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> > --- > arch/arm64/boot/dts/rtsm_ve-aemv8a.dts | 44 +++++++++++++++++++++++++++------- > 1 file changed, 36 insertions(+), 8 deletions(-) > > diff --git a/arch/arm64/boot/dts/rtsm_ve-aemv8a.dts b/arch/arm64/boot/dts/rtsm_ve-aemv8a.dts > index d79de9c..4051ffb 100644 > --- a/arch/arm64/boot/dts/rtsm_ve-aemv8a.dts > +++ b/arch/arm64/boot/dts/rtsm_ve-aemv8a.dts > @@ -27,37 +27,65 @@ > serial3 = &v2m_serial3; > }; > > + psci { > + compatible = "arm,psci-0.2"; Where can I find a PSCI 0.2 implementation for the RTSM VE model? I couldn't find a link in the cover. The upstream bootwrapper is not PSCI 0.2 compliant and it does not implement CPU_SUSPEND. > + method = "smc"; > + cpu_suspend = <0xc4000001>; > + cpu_off = <0x84000002>; > + cpu_on = <0xc4000003>; Without "arm,psci" in the compatible list, these three properties are meaningless. > + }; > + > cpus { > #address-cells = <2>; > #size-cells = <0>; > > + idle-states { > + entry-method = "arm,psci"; > + > + CPU_SLEEP_0: cpu-sleep-0 { > + compatible = "arm,idle-state"; > + entry-method-param = <0x0010000>; > + entry-latency-us = <40>; > + exit-latency-us = <100>; > + min-residency-us = <150>; > + }; > + > + CLUSTER_SLEEP_0: cluster-sleep-0 { > + compatible = "arm,idle-state"; > + entry-method-param = <0x1010000>; > + entry-latency-us = <500>; > + exit-latency-us = <1000>; > + min-residency-us = <2500>; > + }; > + }; > + If this is going to live in the /cpus node, could it please be placed after the cpu nodes? > cpu@0 { > device_type = "cpu"; > compatible = "arm,armv8"; > reg = <0x0 0x0>; > - enable-method = "spin-table"; > - cpu-release-addr = <0x0 0x8000fff8>; > + enable-method = "psci"; Changing the enable-method will break boot on a model when using a bootwrapper without PSCI support. Really we should leave it up to the bootwrapper to inject the enable method... Mark. -- To unsubscribe from this list: send the line "unsubscribe linux-pm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 25/06/14 15:10, Lorenzo Pieralisi wrote: > This patch updates the RTSM dts file with PSCI bindings and nodes > describing the AEMv8 model idle states parameters. > > Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> > --- > arch/arm64/boot/dts/rtsm_ve-aemv8a.dts | 44 +++++++++++++++++++++++++++------- > 1 file changed, 36 insertions(+), 8 deletions(-) > > diff --git a/arch/arm64/boot/dts/rtsm_ve-aemv8a.dts b/arch/arm64/boot/dts/rtsm_ve-aemv8a.dts > index d79de9c..4051ffb 100644 > --- a/arch/arm64/boot/dts/rtsm_ve-aemv8a.dts > +++ b/arch/arm64/boot/dts/rtsm_ve-aemv8a.dts > @@ -27,37 +27,65 @@ > serial3 = &v2m_serial3; > }; > > + psci { > + compatible = "arm,psci-0.2"; > + method = "smc"; > + cpu_suspend = <0xc4000001>; > + cpu_off = <0x84000002>; > + cpu_on = <0xc4000003>; Standard PSCI v0.2 function IDs are used for "arm,psci-0.2", so you can drop them here. Regards, Sudeep -- To unsubscribe from this list: send the line "unsubscribe linux-pm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Wed, Jun 25, 2014 at 03:27:14PM +0100, Mark Rutland wrote: > Hi Lorenzo, > > On Wed, Jun 25, 2014 at 03:10:21PM +0100, Lorenzo Pieralisi wrote: > > This patch updates the RTSM dts file with PSCI bindings and nodes > > describing the AEMv8 model idle states parameters. > > > > Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> > > --- > > arch/arm64/boot/dts/rtsm_ve-aemv8a.dts | 44 +++++++++++++++++++++++++++------- > > 1 file changed, 36 insertions(+), 8 deletions(-) > > > > diff --git a/arch/arm64/boot/dts/rtsm_ve-aemv8a.dts b/arch/arm64/boot/dts/rtsm_ve-aemv8a.dts > > index d79de9c..4051ffb 100644 > > --- a/arch/arm64/boot/dts/rtsm_ve-aemv8a.dts > > +++ b/arch/arm64/boot/dts/rtsm_ve-aemv8a.dts > > @@ -27,37 +27,65 @@ > > serial3 = &v2m_serial3; > > }; > > > > + psci { > > + compatible = "arm,psci-0.2"; > > Where can I find a PSCI 0.2 implementation for the RTSM VE model? I > couldn't find a link in the cover. > > The upstream bootwrapper is not PSCI 0.2 compliant and it does not > implement CPU_SUSPEND. This patch was not meant to be merged, it was for DT bindings demonstration purposes, you are definitely right. I will patch the FVP model dts and add a link to trusted firmware that supports the FVP models power controller. > > + method = "smc"; > > + cpu_suspend = <0xc4000001>; > > + cpu_off = <0x84000002>; > > + cpu_on = <0xc4000003>; > > Without "arm,psci" in the compatible list, these three properties are > meaningless. Right, my bad. > > + }; > > + > > cpus { > > #address-cells = <2>; > > #size-cells = <0>; > > > > + idle-states { > > + entry-method = "arm,psci"; > > + > > + CPU_SLEEP_0: cpu-sleep-0 { > > + compatible = "arm,idle-state"; > > + entry-method-param = <0x0010000>; > > + entry-latency-us = <40>; > > + exit-latency-us = <100>; > > + min-residency-us = <150>; > > + }; > > + > > + CLUSTER_SLEEP_0: cluster-sleep-0 { > > + compatible = "arm,idle-state"; > > + entry-method-param = <0x1010000>; > > + entry-latency-us = <500>; > > + exit-latency-us = <1000>; > > + min-residency-us = <2500>; > > + }; > > + }; > > + > > If this is going to live in the /cpus node, could it please be placed > after the cpu nodes? Ok. > > cpu@0 { > > device_type = "cpu"; > > compatible = "arm,armv8"; > > reg = <0x0 0x0>; > > - enable-method = "spin-table"; > > - cpu-release-addr = <0x0 0x8000fff8>; > > + enable-method = "psci"; > > Changing the enable-method will break boot on a model when using a > bootwrapper without PSCI support. Really we should leave it up to the > bootwrapper to inject the enable method... See above, you are right, I should have made it clear that this patch was not meant for merging or testing and it was to provide a sample dts, will fix it for v6. Thanks, Lorenzo -- To unsubscribe from this list: send the line "unsubscribe linux-pm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/arch/arm64/boot/dts/rtsm_ve-aemv8a.dts b/arch/arm64/boot/dts/rtsm_ve-aemv8a.dts index d79de9c..4051ffb 100644 --- a/arch/arm64/boot/dts/rtsm_ve-aemv8a.dts +++ b/arch/arm64/boot/dts/rtsm_ve-aemv8a.dts @@ -27,37 +27,65 @@ serial3 = &v2m_serial3; }; + psci { + compatible = "arm,psci-0.2"; + method = "smc"; + cpu_suspend = <0xc4000001>; + cpu_off = <0x84000002>; + cpu_on = <0xc4000003>; + }; + cpus { #address-cells = <2>; #size-cells = <0>; + idle-states { + entry-method = "arm,psci"; + + CPU_SLEEP_0: cpu-sleep-0 { + compatible = "arm,idle-state"; + entry-method-param = <0x0010000>; + entry-latency-us = <40>; + exit-latency-us = <100>; + min-residency-us = <150>; + }; + + CLUSTER_SLEEP_0: cluster-sleep-0 { + compatible = "arm,idle-state"; + entry-method-param = <0x1010000>; + entry-latency-us = <500>; + exit-latency-us = <1000>; + min-residency-us = <2500>; + }; + }; + cpu@0 { device_type = "cpu"; compatible = "arm,armv8"; reg = <0x0 0x0>; - enable-method = "spin-table"; - cpu-release-addr = <0x0 0x8000fff8>; + enable-method = "psci"; + cpu-idle-states = <&CPU_SLEEP_0 &CLUSTER_SLEEP_0>; }; cpu@1 { device_type = "cpu"; compatible = "arm,armv8"; reg = <0x0 0x1>; - enable-method = "spin-table"; - cpu-release-addr = <0x0 0x8000fff8>; + enable-method = "psci"; + cpu-idle-states = <&CPU_SLEEP_0 &CLUSTER_SLEEP_0>; }; cpu@2 { device_type = "cpu"; compatible = "arm,armv8"; reg = <0x0 0x2>; - enable-method = "spin-table"; - cpu-release-addr = <0x0 0x8000fff8>; + enable-method = "psci"; + cpu-idle-states = <&CPU_SLEEP_0 &CLUSTER_SLEEP_0>; }; cpu@3 { device_type = "cpu"; compatible = "arm,armv8"; reg = <0x0 0x3>; - enable-method = "spin-table"; - cpu-release-addr = <0x0 0x8000fff8>; + enable-method = "psci"; + cpu-idle-states = <&CPU_SLEEP_0 &CLUSTER_SLEEP_0>; }; };
This patch updates the RTSM dts file with PSCI bindings and nodes describing the AEMv8 model idle states parameters. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> --- arch/arm64/boot/dts/rtsm_ve-aemv8a.dts | 44 +++++++++++++++++++++++++++------- 1 file changed, 36 insertions(+), 8 deletions(-)