[PATCH] ARM: dts: Add TMU dt node to monitor the temperature for Exynos3250

[PATCH] ARM: dts: Add TMU dt node to monitor the temperature for Exynos3250

[Chanwoo Choi]

This patch add TMU (Thermal Management Unit) dt node to monitor the high
temperature for Exynos3250.

Signed-off-by: Chanwoo Choi <cw00.choi-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
Acked-by: Kyungmin Park <kyungmin.park-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
---
This patch has a dependency on following patch [1]:
 [1] https://lkml.org/lkml/2014/6/30/805

 arch/arm/boot/dts/exynos3250.dtsi | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/arm/boot/dts/exynos3250.dtsi b/arch/arm/boot/dts/exynos3250.dtsi
index 3660cab..1e566af 100644
--- a/arch/arm/boot/dts/exynos3250.dtsi
+++ b/arch/arm/boot/dts/exynos3250.dtsi
@@ -192,6 +192,16 @@
 			status = "disabled";
 		};
 
+		tmu: tmu@100C0000 {
+			compatible = "samsung,exynos3250-tmu";
+			interrupt-parent = <&gic>;
+			reg = <0x100C0000 0x100>;
+			interrupts = <0 216 0>;
+			clocks = <&cmu CLK_TMU_APBIF>;
+			clock-names = "tmu_apbif";
+			status = "disabled";
+		};
+
 		gic: interrupt-controller@10481000 {
 			compatible = "arm,cortex-a15-gic";
 			#interrupt-cells = <3>;
-- 
1.8.0

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Re: [PATCH] ARM: dts: Add TMU dt node to monitor the temperature for Exynos3250

[Sachin Kamat]

Hi Chanwoo,

On Tue, Jul 1, 2014 at 6:10 AM, Chanwoo Choi <cw00.choi-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org> wrote:
> This patch add TMU (Thermal Management Unit) dt node to monitor the high
> temperature for Exynos3250.
>
> Signed-off-by: Chanwoo Choi <cw00.choi-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
> Acked-by: Kyungmin Park <kyungmin.park-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
> ---
> This patch has a dependency on following patch [1]:
>  [1] https://lkml.org/lkml/2014/6/30/805
>
>  arch/arm/boot/dts/exynos3250.dtsi | 10 ++++++++++
>  1 file changed, 10 insertions(+)
>
> diff --git a/arch/arm/boot/dts/exynos3250.dtsi b/arch/arm/boot/dts/exynos3250.dtsi
> index 3660cab..1e566af 100644
> --- a/arch/arm/boot/dts/exynos3250.dtsi
> +++ b/arch/arm/boot/dts/exynos3250.dtsi
> @@ -192,6 +192,16 @@
>                         status = "disabled";
>                 };
>
> +               tmu: tmu@100C0000 {
> +                       compatible = "samsung,exynos3250-tmu";
> +                       interrupt-parent = <&gic>;
> +                       reg = <0x100C0000 0x100>;
> +                       interrupts = <0 216 0>;
> +                       clocks = <&cmu CLK_TMU_APBIF>;
> +                       clock-names = "tmu_apbif";
> +                       status = "disabled";

I don't think there would be any board specific properties needed. Hence
leave the status as enabled (by deleting the above line).

-- 
Regards,
Sachin.
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Re: [PATCH] ARM: dts: Add TMU dt node to monitor the temperature for Exynos3250

[Chanwoo Choi]

Hi Sachin,

On 07/01/2014 12:33 PM, Sachin Kamat wrote:
> Hi Chanwoo,
> 
> On Tue, Jul 1, 2014 at 6:10 AM, Chanwoo Choi <cw00.choi@samsung.com> wrote:
>> This patch add TMU (Thermal Management Unit) dt node to monitor the high
>> temperature for Exynos3250.
>>
>> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
>> Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
>> ---
>> This patch has a dependency on following patch [1]:
>>  [1] https://lkml.org/lkml/2014/6/30/805
>>
>>  arch/arm/boot/dts/exynos3250.dtsi | 10 ++++++++++
>>  1 file changed, 10 insertions(+)
>>
>> diff --git a/arch/arm/boot/dts/exynos3250.dtsi b/arch/arm/boot/dts/exynos3250.dtsi
>> index 3660cab..1e566af 100644
>> --- a/arch/arm/boot/dts/exynos3250.dtsi
>> +++ b/arch/arm/boot/dts/exynos3250.dtsi
>> @@ -192,6 +192,16 @@
>>                         status = "disabled";
>>                 };
>>
>> +               tmu: tmu@100C0000 {
>> +                       compatible = "samsung,exynos3250-tmu";
>> +                       interrupt-parent = <&gic>;
>> +                       reg = <0x100C0000 0x100>;
>> +                       interrupts = <0 216 0>;
>> +                       clocks = <&cmu CLK_TMU_APBIF>;
>> +                       clock-names = "tmu_apbif";
>> +                       status = "disabled";
> 
> I don't think there would be any board specific properties needed. Hence
> leave the status as enabled (by deleting the above line).
> 

I think that if specific board need TMU feature, dts file for specific board
should include tmu dt node with 'okay' status. The specific board based on
Exynos3250 might not need TMU feature.

Best Regards,
Chanwoo Choi

Re: [PATCH] ARM: dts: Add TMU dt node to monitor the temperature for Exynos3250

[Sachin Kamat]

Hi Chanwoo,

On Tue, Jul 1, 2014 at 9:34 AM, Chanwoo Choi <cw00.choi@samsung.com> wrote:
> Hi Sachin,
>
> On 07/01/2014 12:33 PM, Sachin Kamat wrote:
>> Hi Chanwoo,
>>
>> On Tue, Jul 1, 2014 at 6:10 AM, Chanwoo Choi <cw00.choi@samsung.com> wrote:
>>> This patch add TMU (Thermal Management Unit) dt node to monitor the high
>>> temperature for Exynos3250.
>>>
>>> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
>>> Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
>>> ---
>>> This patch has a dependency on following patch [1]:
>>>  [1] https://lkml.org/lkml/2014/6/30/805
>>>
>>>  arch/arm/boot/dts/exynos3250.dtsi | 10 ++++++++++
>>>  1 file changed, 10 insertions(+)
>>>
>>> diff --git a/arch/arm/boot/dts/exynos3250.dtsi b/arch/arm/boot/dts/exynos3250.dtsi
>>> index 3660cab..1e566af 100644
>>> --- a/arch/arm/boot/dts/exynos3250.dtsi
>>> +++ b/arch/arm/boot/dts/exynos3250.dtsi
>>> @@ -192,6 +192,16 @@
>>>                         status = "disabled";
>>>                 };
>>>
>>> +               tmu: tmu@100C0000 {
>>> +                       compatible = "samsung,exynos3250-tmu";
>>> +                       interrupt-parent = <&gic>;
>>> +                       reg = <0x100C0000 0x100>;
>>> +                       interrupts = <0 216 0>;
>>> +                       clocks = <&cmu CLK_TMU_APBIF>;
>>> +                       clock-names = "tmu_apbif";
>>> +                       status = "disabled";
>>
>> I don't think there would be any board specific properties needed. Hence
>> leave the status as enabled (by deleting the above line).
>>
>
> I think that if specific board need TMU feature, dts file for specific board
> should include tmu dt node with 'okay' status. The specific board based on
> Exynos3250 might not need TMU feature.

The status field in DT node is not meant for stating the build configuration but
represents the readiness of the hardware for usage on the platform. If
a particular
board does not need this feature it needs to be disabled in the build
config and only
for any special requirements disable it in board file.


-- 
Regards,
Sachin.

Re: [PATCH] ARM: dts: Add TMU dt node to monitor the temperature for Exynos3250

[Chanwoo Choi]

On 07/01/2014 01:10 PM, Sachin Kamat wrote:
> Hi Chanwoo,
> 
> On Tue, Jul 1, 2014 at 9:34 AM, Chanwoo Choi <cw00.choi@samsung.com> wrote:
>> Hi Sachin,
>>
>> On 07/01/2014 12:33 PM, Sachin Kamat wrote:
>>> Hi Chanwoo,
>>>
>>> On Tue, Jul 1, 2014 at 6:10 AM, Chanwoo Choi <cw00.choi@samsung.com> wrote:
>>>> This patch add TMU (Thermal Management Unit) dt node to monitor the high
>>>> temperature for Exynos3250.
>>>>
>>>> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
>>>> Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
>>>> ---
>>>> This patch has a dependency on following patch [1]:
>>>>  [1] https://lkml.org/lkml/2014/6/30/805
>>>>
>>>>  arch/arm/boot/dts/exynos3250.dtsi | 10 ++++++++++
>>>>  1 file changed, 10 insertions(+)
>>>>
>>>> diff --git a/arch/arm/boot/dts/exynos3250.dtsi b/arch/arm/boot/dts/exynos3250.dtsi
>>>> index 3660cab..1e566af 100644
>>>> --- a/arch/arm/boot/dts/exynos3250.dtsi
>>>> +++ b/arch/arm/boot/dts/exynos3250.dtsi
>>>> @@ -192,6 +192,16 @@
>>>>                         status = "disabled";
>>>>                 };
>>>>
>>>> +               tmu: tmu@100C0000 {
>>>> +                       compatible = "samsung,exynos3250-tmu";
>>>> +                       interrupt-parent = <&gic>;
>>>> +                       reg = <0x100C0000 0x100>;
>>>> +                       interrupts = <0 216 0>;
>>>> +                       clocks = <&cmu CLK_TMU_APBIF>;
>>>> +                       clock-names = "tmu_apbif";
>>>> +                       status = "disabled";
>>>
>>> I don't think there would be any board specific properties needed. Hence
>>> leave the status as enabled (by deleting the above line).
>>>
>>
>> I think that if specific board need TMU feature, dts file for specific board
>> should include tmu dt node with 'okay' status. The specific board based on
>> Exynos3250 might not need TMU feature.
> 
> The status field in DT node is not meant for stating the build configuration but
> represents the readiness of the hardware for usage on the platform. If
> a particular
> board does not need this feature it needs to be disabled in the build
> config and only
> for any special requirements disable it in board file.

TMU (Thermal Management Unit) needs specific regulator for TMU power as following:
The regulator for TMU is dependent on board.

For exmaple: in board dts file including tmu dt

	&tmu {
		vtmu-supply = <&ldo7_reg>;
		status = "okay";
	};

Re: [PATCH] ARM: dts: Add TMU dt node to monitor the temperature for Exynos3250

[Sachin Kamat]

On Wed, Jul 2, 2014 at 5:22 AM, Chanwoo Choi <cw00.choi-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org> wrote:
> On 07/01/2014 01:10 PM, Sachin Kamat wrote:
>> Hi Chanwoo,
>>
>> On Tue, Jul 1, 2014 at 9:34 AM, Chanwoo Choi <cw00.choi-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org> wrote:
>>> Hi Sachin,
>>>
>>> On 07/01/2014 12:33 PM, Sachin Kamat wrote:
>>>> Hi Chanwoo,
>>>>
>>>> On Tue, Jul 1, 2014 at 6:10 AM, Chanwoo Choi <cw00.choi-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org> wrote:
>>>>> This patch add TMU (Thermal Management Unit) dt node to monitor the high
>>>>> temperature for Exynos3250.
>>>>>
>>>>> Signed-off-by: Chanwoo Choi <cw00.choi-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
>>>>> Acked-by: Kyungmin Park <kyungmin.park-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
>>>>> ---
>>>>> This patch has a dependency on following patch [1]:
>>>>>  [1] https://lkml.org/lkml/2014/6/30/805
>>>>>
>>>>>  arch/arm/boot/dts/exynos3250.dtsi | 10 ++++++++++
>>>>>  1 file changed, 10 insertions(+)
>>>>>
>>>>> diff --git a/arch/arm/boot/dts/exynos3250.dtsi b/arch/arm/boot/dts/exynos3250.dtsi
>>>>> index 3660cab..1e566af 100644
>>>>> --- a/arch/arm/boot/dts/exynos3250.dtsi
>>>>> +++ b/arch/arm/boot/dts/exynos3250.dtsi
>>>>> @@ -192,6 +192,16 @@
>>>>>                         status = "disabled";
>>>>>                 };
>>>>>
>>>>> +               tmu: tmu@100C0000 {
>>>>> +                       compatible = "samsung,exynos3250-tmu";
>>>>> +                       interrupt-parent = <&gic>;
>>>>> +                       reg = <0x100C0000 0x100>;
>>>>> +                       interrupts = <0 216 0>;
>>>>> +                       clocks = <&cmu CLK_TMU_APBIF>;
>>>>> +                       clock-names = "tmu_apbif";
>>>>> +                       status = "disabled";
>>>>
>>>> I don't think there would be any board specific properties needed. Hence
>>>> leave the status as enabled (by deleting the above line).
>>>>
>>>
>>> I think that if specific board need TMU feature, dts file for specific board
>>> should include tmu dt node with 'okay' status. The specific board based on
>>> Exynos3250 might not need TMU feature.
>>
>> The status field in DT node is not meant for stating the build configuration but
>> represents the readiness of the hardware for usage on the platform. If
>> a particular
>> board does not need this feature it needs to be disabled in the build
>> config and only
>> for any special requirements disable it in board file.
>
> TMU (Thermal Management Unit) needs specific regulator for TMU power as following:
> The regulator for TMU is dependent on board.

In this case it makes sense to leave it disabled in dtsi.

-- 
Regards,
Sachin.
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Re: [PATCH] ARM: dts: Add TMU dt node to monitor the temperature for Exynos3250

[Chanwoo Choi]

Hi Sachin,

On 07/02/2014 12:09 PM, Sachin Kamat wrote:
> On Wed, Jul 2, 2014 at 5:22 AM, Chanwoo Choi <cw00.choi-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org> wrote:
>> On 07/01/2014 01:10 PM, Sachin Kamat wrote:
>>> Hi Chanwoo,
>>>
>>> On Tue, Jul 1, 2014 at 9:34 AM, Chanwoo Choi <cw00.choi-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org> wrote:
>>>> Hi Sachin,
>>>>
>>>> On 07/01/2014 12:33 PM, Sachin Kamat wrote:
>>>>> Hi Chanwoo,
>>>>>
>>>>> On Tue, Jul 1, 2014 at 6:10 AM, Chanwoo Choi <cw00.choi-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org> wrote:
>>>>>> This patch add TMU (Thermal Management Unit) dt node to monitor the high
>>>>>> temperature for Exynos3250.
>>>>>>
>>>>>> Signed-off-by: Chanwoo Choi <cw00.choi-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
>>>>>> Acked-by: Kyungmin Park <kyungmin.park-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
>>>>>> ---
>>>>>> This patch has a dependency on following patch [1]:
>>>>>>  [1] https://lkml.org/lkml/2014/6/30/805
>>>>>>
>>>>>>  arch/arm/boot/dts/exynos3250.dtsi | 10 ++++++++++
>>>>>>  1 file changed, 10 insertions(+)
>>>>>>
>>>>>> diff --git a/arch/arm/boot/dts/exynos3250.dtsi b/arch/arm/boot/dts/exynos3250.dtsi
>>>>>> index 3660cab..1e566af 100644
>>>>>> --- a/arch/arm/boot/dts/exynos3250.dtsi
>>>>>> +++ b/arch/arm/boot/dts/exynos3250.dtsi
>>>>>> @@ -192,6 +192,16 @@
>>>>>>                         status = "disabled";
>>>>>>                 };
>>>>>>
>>>>>> +               tmu: tmu@100C0000 {
>>>>>> +                       compatible = "samsung,exynos3250-tmu";
>>>>>> +                       interrupt-parent = <&gic>;
>>>>>> +                       reg = <0x100C0000 0x100>;
>>>>>> +                       interrupts = <0 216 0>;
>>>>>> +                       clocks = <&cmu CLK_TMU_APBIF>;
>>>>>> +                       clock-names = "tmu_apbif";
>>>>>> +                       status = "disabled";
>>>>>
>>>>> I don't think there would be any board specific properties needed. Hence
>>>>> leave the status as enabled (by deleting the above line).
>>>>>
>>>>
>>>> I think that if specific board need TMU feature, dts file for specific board
>>>> should include tmu dt node with 'okay' status. The specific board based on
>>>> Exynos3250 might not need TMU feature.
>>>
>>> The status field in DT node is not meant for stating the build configuration but
>>> represents the readiness of the hardware for usage on the platform. If
>>> a particular
>>> board does not need this feature it needs to be disabled in the build
>>> config and only
>>> for any special requirements disable it in board file.
>>
>> TMU (Thermal Management Unit) needs specific regulator for TMU power as following:
>> The regulator for TMU is dependent on board.
> 
> In this case it makes sense to leave it disabled in dtsi.
> 

Thanks for your review.

Best Regards,
Chanwoo Choi
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