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SubjectRe: [PATCH V2 1/2] ARM: dts: DRA7: Add bandgap and related thermal nodes


On Friday 27 March 2015 11:32 AM, Keerthy wrote:
>
>
> On Tuesday 24 March 2015 01:09 AM, Nishanth Menon wrote:
>> From: Keerthy <j-keerthy@ti.com>
>>
>> Add bandgap and related thermal nodes. The patch adds 5 thermal
>> sensors. Only one cooling device for mpu as of now. The sensors are
>> the exact same on both dra72 and dra7. Introduce CPU, GPU, core nodes
>> for the moment as they are direct reuse of OMAP5 entities.
>>
>> NOTE: OMAP4 has a finer counter granularity, which allows for a delay
>> of 1000ms in the thermal zone polling intervals. DRA7 have different
>> counter mechanism, which allows at maximum a 500ms timer. Adjust the
>> cpu thermal zone accordingly for DRA7.
>>
>> Signed-off-by: Keerthy <j-keerthy@ti.com>
>> [t-kristo@ti.com: few reuse from OMAP5 entities]
>> Signed-off-by: Tero Kristo <t-kristo@ti.com>
>> Signed-off-by: Nishanth Menon <nm@ti.com>
>> ---
>> Changes since V1:
>> - omap5-cpu-thermal.dtsi dropped
>> - approach similar to omap5
>> - added core and gpu thermal dtsi(they can be reused)
>> - Squashed patch #1 from v1 to patch #2 - this patch.
>> - Not carrying forward ack due to change
>
> Thanks for updating Nishanth. Looks good to me.

Tested on DRA7 EVM.

Read the temperatures from all the 5 sensors they were sane.
Loaded the CPU and saw the temperatures rise and fall with increase and
decrease in the load.

Tested-by: Keerthy <j-keerthy@ti.com>
>
> - Keerthy
>
>>
>> V1: http://marc.info/?t=142688102700006&r=1&w=2
>>
>> arch/arm/boot/dts/dra7.dtsi | 23 +++++++++++++++++++++++
>> arch/arm/boot/dts/dra72x.dtsi | 5 +++++
>> arch/arm/boot/dts/dra74x.dtsi | 5 +++++
>> 3 files changed, 33 insertions(+)
>>
>> diff --git a/arch/arm/boot/dts/dra7.dtsi b/arch/arm/boot/dts/dra7.dtsi
>> index eea4a54d6cb3..2d6a7e3e001f 100644
>> --- a/arch/arm/boot/dts/dra7.dtsi
>> +++ b/arch/arm/boot/dts/dra7.dtsi
>> @@ -177,6 +177,18 @@
>> };
>> };
>>
>> + bandgap: bandgap@4a0021e0 {
>> + reg = <0x4a0021e0 0xc
>> + 0x4a00232c 0xc
>> + 0x4a002380 0x2c
>> + 0x4a0023C0 0x3c
>> + 0x4a002564 0x8
>> + 0x4a002574 0x50>;
>> + compatible = "ti,dra752-bandgap";
>> + interrupts = <GIC_SPI 121 IRQ_TYPE_LEVEL_HIGH>;
>> + #thermal-sensor-cells = <1>;
>> + };
>> +
>> cm_core_aon: cm_core_aon@4a005000 {
>> compatible = "ti,dra7-cm-core-aon";
>> reg = <0x4a005000 0x2000>;
>> @@ -1419,6 +1431,17 @@
>> status = "disabled";
>> };
>> };
>> +
>> + thermal_zones: thermal-zones {
>> + #include "omap4-cpu-thermal.dtsi"
>> + #include "omap5-gpu-thermal.dtsi"
>> + #include "omap5-core-thermal.dtsi"
>> + };
>> +
>> +};
>> +
>> +&cpu_thermal {
>> + polling-delay = <500>; /* milliseconds */
>> };
>>
>> /include/ "dra7xx-clocks.dtsi"
>> diff --git a/arch/arm/boot/dts/dra72x.dtsi
>> b/arch/arm/boot/dts/dra72x.dtsi
>> index e5a3d23a3df1..6ac8e3601499 100644
>> --- a/arch/arm/boot/dts/dra72x.dtsi
>> +++ b/arch/arm/boot/dts/dra72x.dtsi
>> @@ -20,6 +20,11 @@
>> device_type = "cpu";
>> compatible = "arm,cortex-a15";
>> reg = <0>;
>> +
>> + /* cooling options */
>> + cooling-min-level = <0>;
>> + cooling-max-level = <2>;
>> + #cooling-cells = <2>; /* min followed by max */
>> };
>> };
>>
>> diff --git a/arch/arm/boot/dts/dra74x.dtsi
>> b/arch/arm/boot/dts/dra74x.dtsi
>> index 10173fab1a15..eef981f4bcd5 100644
>> --- a/arch/arm/boot/dts/dra74x.dtsi
>> +++ b/arch/arm/boot/dts/dra74x.dtsi
>> @@ -31,6 +31,11 @@
>> clock-names = "cpu";
>>
>> clock-latency = <300000>; /* From omap-cpufreq driver */
>> +
>> + /* cooling options */
>> + cooling-min-level = <0>;
>> + cooling-max-level = <2>;
>> + #cooling-cells = <2>; /* min followed by max */
>> };
>> cpu@1 {
>> device_type = "cpu";
>>


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