diff mbox

ARM: dts: add CPU nodes for Exynos4 SoCs

Message ID 1863399.9O2S91ZvEO@amdc1032 (mailing list archive)
State New, archived
Headers show

Commit Message

Bartlomiej Zolnierkiewicz July 18, 2014, 4 p.m. UTC
Recent patch by Tomasz Figa ("irqchip: gic: Fix core ID calculation
when topology is read from DT") fixed GIC driver to filter cluster ID
from values returned by cpu_logical_map() for SoCs having registers
mapped without per-CPU banking making it is possible to add CPU nodes
for Exynos4 SoCs.  In case of Exynos SoCs these CPU nodes are also
required by future changes adding initialization of cpuidle states in
Exynos cpuidle driver through DT.

Tested on Origen board (Exynos4210 SoC) and Trats2 (Exynos4412 SoC).

Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
---
Based on next-20140717 branch of linux-next tree +
- [PATCH 2/6] ARM: EXYNOS: Fix core ID used by platsmp and hotplug code
  http://www.mail-archive.com/linux-samsung-soc@vger.kernel.org/msg32811.html
- [PATCH] irqchip: gic: Fix core ID calculation when topology is read from DT
  http://www.mail-archive.com/linux-samsung-soc@vger.kernel.org/msg34277.html

 arch/arm/boot/dts/exynos4210.dtsi | 17 +++++++++++++++++
 arch/arm/boot/dts/exynos4212.dtsi | 17 +++++++++++++++++
 arch/arm/boot/dts/exynos4412.dtsi | 29 +++++++++++++++++++++++++++++
 3 files changed, 63 insertions(+)

Comments

Mark Rutland July 18, 2014, 4:18 p.m. UTC | #1
On Fri, Jul 18, 2014 at 05:00:02PM +0100, Bartlomiej Zolnierkiewicz wrote:
> Recent patch by Tomasz Figa ("irqchip: gic: Fix core ID calculation
> when topology is read from DT") fixed GIC driver to filter cluster ID
> from values returned by cpu_logical_map() for SoCs having registers
> mapped without per-CPU banking making it is possible to add CPU nodes
> for Exynos4 SoCs.  In case of Exynos SoCs these CPU nodes are also
> required by future changes adding initialization of cpuidle states in
> Exynos cpuidle driver through DT.
> 
> Tested on Origen board (Exynos4210 SoC) and Trats2 (Exynos4412 SoC).
> 
> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
> ---
> Based on next-20140717 branch of linux-next tree +
> - [PATCH 2/6] ARM: EXYNOS: Fix core ID used by platsmp and hotplug code
>   http://www.mail-archive.com/linux-samsung-soc@vger.kernel.org/msg32811.html
> - [PATCH] irqchip: gic: Fix core ID calculation when topology is read from DT
>   http://www.mail-archive.com/linux-samsung-soc@vger.kernel.org/msg34277.html
> 
>  arch/arm/boot/dts/exynos4210.dtsi | 17 +++++++++++++++++
>  arch/arm/boot/dts/exynos4212.dtsi | 17 +++++++++++++++++
>  arch/arm/boot/dts/exynos4412.dtsi | 29 +++++++++++++++++++++++++++++
>  3 files changed, 63 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/exynos4210.dtsi b/arch/arm/boot/dts/exynos4210.dtsi
> index ee3001f..b99fc83 100644
> --- a/arch/arm/boot/dts/exynos4210.dtsi
> +++ b/arch/arm/boot/dts/exynos4210.dtsi
> @@ -31,6 +31,23 @@
>  		pinctrl2 = &pinctrl_2;
>  	};
>  
> +	cpus {
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		cpu@0 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a9";
> +			reg = <0x900>;
> +		};

Please match the unit-address with the reg (e.g. this should be
cpu@900).

Please do this for all the other CPU nodes.

Thanks,
Mark.

> +
> +		cpu@1 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a9";
> +			reg = <0x901>;
> +		};
> +	};
> +
>  	sysram@02020000 {
>  		compatible = "mmio-sram";
>  		reg = <0x02020000 0x20000>;
> diff --git a/arch/arm/boot/dts/exynos4212.dtsi b/arch/arm/boot/dts/exynos4212.dtsi
> index 3c00e6e..484a2da 100644
> --- a/arch/arm/boot/dts/exynos4212.dtsi
> +++ b/arch/arm/boot/dts/exynos4212.dtsi
> @@ -22,6 +22,23 @@
>  / {
>  	compatible = "samsung,exynos4212", "samsung,exynos4";
>  
> +	cpus {
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		cpu@0 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a9";
> +			reg = <0xA00>;
> +		};
> +
> +		cpu@1 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a9";
> +			reg = <0xA01>;
> +		};
> +	};
> +
>  	combiner: interrupt-controller@10440000 {
>  		samsung,combiner-nr = <18>;
>  	};
> diff --git a/arch/arm/boot/dts/exynos4412.dtsi b/arch/arm/boot/dts/exynos4412.dtsi
> index c42a3e1..89f4743 100644
> --- a/arch/arm/boot/dts/exynos4412.dtsi
> +++ b/arch/arm/boot/dts/exynos4412.dtsi
> @@ -22,6 +22,35 @@
>  / {
>  	compatible = "samsung,exynos4412", "samsung,exynos4";
>  
> +	cpus {
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		cpu@0 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a9";
> +			reg = <0xA00>;
> +		};
> +
> +		cpu@1 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a9";
> +			reg = <0xA01>;
> +		};
> +
> +		cpu@2 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a9";
> +			reg = <0xA02>;
> +		};
> +
> +		cpu@3 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a9";
> +			reg = <0xA03>;
> +		};
> +	};
> +
>  	combiner: interrupt-controller@10440000 {
>  		samsung,combiner-nr = <20>;
>  	};
> -- 
> 1.8.2.3
> 
> 
> 
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
> 
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Daniel Drake July 21, 2014, 12:43 p.m. UTC | #2
On Fri, Jul 18, 2014 at 5:00 PM, Bartlomiej Zolnierkiewicz
<b.zolnierkie@samsung.com> wrote:
> Recent patch by Tomasz Figa ("irqchip: gic: Fix core ID calculation
> when topology is read from DT") fixed GIC driver to filter cluster ID
> from values returned by cpu_logical_map() for SoCs having registers
> mapped without per-CPU banking making it is possible to add CPU nodes
> for Exynos4 SoCs.  In case of Exynos SoCs these CPU nodes are also
> required by future changes adding initialization of cpuidle states in
> Exynos cpuidle driver through DT.

This conflicts with work in the thread "cpufreq: use generic cpufreq
drivers for exynos platforms" which is already in its 7th iteration.
Perhaps best to work directly with Thomas to help him finish that series?

Daniel
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Bartlomiej Zolnierkiewicz July 21, 2014, 1:10 p.m. UTC | #3
Hi,

On Monday, July 21, 2014 01:43:53 PM Daniel Drake wrote:
> On Fri, Jul 18, 2014 at 5:00 PM, Bartlomiej Zolnierkiewicz
> <b.zolnierkie@samsung.com> wrote:
> > Recent patch by Tomasz Figa ("irqchip: gic: Fix core ID calculation
> > when topology is read from DT") fixed GIC driver to filter cluster ID
> > from values returned by cpu_logical_map() for SoCs having registers
> > mapped without per-CPU banking making it is possible to add CPU nodes
> > for Exynos4 SoCs.  In case of Exynos SoCs these CPU nodes are also
> > required by future changes adding initialization of cpuidle states in
> > Exynos cpuidle driver through DT.
> 
> This conflicts with work in the thread "cpufreq: use generic cpufreq
> drivers for exynos platforms" which is already in its 7th iteration.
> Perhaps best to work directly with Thomas to help him finish that series?

Patch "[PATCH v7 4/6] ARM: dts: Exynos: add cpu nodes, opp and cpu clock
configuration data" from Thomas needs another revision anyway since it lacks
cluster ID in Exynos4210 CPU node.  It also mixes addition of CPU nodes
with cpufreq specific changes and IMHO addition of CPU nodes should be in
separate patch to ease bisection if any later problems turn up.  Therefore
I think that it would be the best if Thomas would rebase his work on top of
"irqchip: gic: Fix core ID calculation when topology is read from DT" patch
and this one.  Thomas, are you okay with this?

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics

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Thomas Abraham July 21, 2014, 1:15 p.m. UTC | #4
On Mon, Jul 21, 2014 at 6:40 PM, Bartlomiej Zolnierkiewicz
<b.zolnierkie@samsung.com> wrote:
>
> Hi,
>
> On Monday, July 21, 2014 01:43:53 PM Daniel Drake wrote:
>> On Fri, Jul 18, 2014 at 5:00 PM, Bartlomiej Zolnierkiewicz
>> <b.zolnierkie@samsung.com> wrote:
>> > Recent patch by Tomasz Figa ("irqchip: gic: Fix core ID calculation
>> > when topology is read from DT") fixed GIC driver to filter cluster ID
>> > from values returned by cpu_logical_map() for SoCs having registers
>> > mapped without per-CPU banking making it is possible to add CPU nodes
>> > for Exynos4 SoCs.  In case of Exynos SoCs these CPU nodes are also
>> > required by future changes adding initialization of cpuidle states in
>> > Exynos cpuidle driver through DT.
>>
>> This conflicts with work in the thread "cpufreq: use generic cpufreq
>> drivers for exynos platforms" which is already in its 7th iteration.
>> Perhaps best to work directly with Thomas to help him finish that series?
>
> Patch "[PATCH v7 4/6] ARM: dts: Exynos: add cpu nodes, opp and cpu clock
> configuration data" from Thomas needs another revision anyway since it lacks
> cluster ID in Exynos4210 CPU node.  It also mixes addition of CPU nodes
> with cpufreq specific changes and IMHO addition of CPU nodes should be in
> separate patch to ease bisection if any later problems turn up.  Therefore
> I think that it would be the best if Thomas would rebase his work on top of
> "irqchip: gic: Fix core ID calculation when topology is read from DT" patch
> and this one.  Thomas, are you okay with this?

Hi Bartlomiej,

Yes, I am okay with this.

Regards,
Thomas.

>
> Best regards,
> --
> Bartlomiej Zolnierkiewicz
> Samsung R&D Institute Poland
> Samsung Electronics
>
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> To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in
> the body of a message to majordomo@vger.kernel.org
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diff mbox

Patch

diff --git a/arch/arm/boot/dts/exynos4210.dtsi b/arch/arm/boot/dts/exynos4210.dtsi
index ee3001f..b99fc83 100644
--- a/arch/arm/boot/dts/exynos4210.dtsi
+++ b/arch/arm/boot/dts/exynos4210.dtsi
@@ -31,6 +31,23 @@ 
 		pinctrl2 = &pinctrl_2;
 	};
 
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		cpu@0 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a9";
+			reg = <0x900>;
+		};
+
+		cpu@1 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a9";
+			reg = <0x901>;
+		};
+	};
+
 	sysram@02020000 {
 		compatible = "mmio-sram";
 		reg = <0x02020000 0x20000>;
diff --git a/arch/arm/boot/dts/exynos4212.dtsi b/arch/arm/boot/dts/exynos4212.dtsi
index 3c00e6e..484a2da 100644
--- a/arch/arm/boot/dts/exynos4212.dtsi
+++ b/arch/arm/boot/dts/exynos4212.dtsi
@@ -22,6 +22,23 @@ 
 / {
 	compatible = "samsung,exynos4212", "samsung,exynos4";
 
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		cpu@0 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a9";
+			reg = <0xA00>;
+		};
+
+		cpu@1 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a9";
+			reg = <0xA01>;
+		};
+	};
+
 	combiner: interrupt-controller@10440000 {
 		samsung,combiner-nr = <18>;
 	};
diff --git a/arch/arm/boot/dts/exynos4412.dtsi b/arch/arm/boot/dts/exynos4412.dtsi
index c42a3e1..89f4743 100644
--- a/arch/arm/boot/dts/exynos4412.dtsi
+++ b/arch/arm/boot/dts/exynos4412.dtsi
@@ -22,6 +22,35 @@ 
 / {
 	compatible = "samsung,exynos4412", "samsung,exynos4";
 
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		cpu@0 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a9";
+			reg = <0xA00>;
+		};
+
+		cpu@1 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a9";
+			reg = <0xA01>;
+		};
+
+		cpu@2 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a9";
+			reg = <0xA02>;
+		};
+
+		cpu@3 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a9";
+			reg = <0xA03>;
+		};
+	};
+
 	combiner: interrupt-controller@10440000 {
 		samsung,combiner-nr = <20>;
 	};