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[PATCH 1/2] arm64: dts: ti: am62-phycore-som: Increase cpu frequency to 1.4 GHz

Garrett Giordano posted 2 patches 2 months, 2 weeks ago
There is a newer version of this series
[PATCH 1/2] arm64: dts: ti: am62-phycore-som: Increase cpu frequency to 1.4 GHz
Posted by Garrett Giordano 2 months, 2 weeks ago 
The am625 is capable of running at 1.4 GHz when VDD_CORE is increased
from 0.75V to 0.85V. Here we add a 1.4 GHz node to the a53_opp_table and
increase the VDD_CORE voltage accordingly.

Signed-off-by: Garrett Giordano <ggiordano@phytec.com>
---
 arch/arm64/boot/dts/ti/k3-am62-phycore-som.dtsi | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/ti/k3-am62-phycore-som.dtsi b/arch/arm64/boot/dts/ti/k3-am62-phycore-som.dtsi
index ac8959f3d953..8acbd4facf37 100644
--- a/arch/arm64/boot/dts/ti/k3-am62-phycore-som.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62-phycore-som.dtsi
@@ -205,6 +205,13 @@ AM62X_IOPAD(0x01f4, PIN_INPUT, 0) /* (D16) EXTINTn */
 	};
 };
 
+&a53_opp_table {
+	opp-1400000000 {
+		opp-hz = /bits/ 64 <1400000000>;
+		opp-supported-hw = <0x01 0x0004>;
+	};
+};
+
 &mcu_m4fss {
 	mboxes = <&mailbox0_cluster0 &mbox_m4_0>;
 	memory-region = <&mcu_m4fss_dma_memory_region>,
@@ -265,8 +272,8 @@ pmic@30 {
 		regulators {
 			vdd_core: buck1 {
 				regulator-name = "VDD_CORE";
-				regulator-min-microvolt = <750000>;
-				regulator-max-microvolt = <750000>;
+				regulator-min-microvolt = <850000>;
+				regulator-max-microvolt = <850000>;
 				regulator-boot-on;
 				regulator-always-on;
 			};
-- 
2.25.1
Re: [PATCH 1/2] arm64: dts: ti: am62-phycore-som: Increase cpu frequency to 1.4 GHz
Posted by Nishanth Menon 2 months, 2 weeks ago 
On 10:56-20240913, Garrett Giordano wrote:
> The am625 is capable of running at 1.4 GHz when VDD_CORE is increased
> from 0.75V to 0.85V. Here we add a 1.4 GHz node to the a53_opp_table and
> increase the VDD_CORE voltage accordingly.

The entire argument in introducing the 1.4Ghz overlay seems to have been
to let users have the choice. What has changed since then?

Ref: commit 7a5775a3da906dab059b8de60a2b88f6016cb4b8

btw, instead of putting a patch to delete the dtso, you should
probably consider a revert patch instead.

> 
> Signed-off-by: Garrett Giordano <ggiordano@phytec.com>
> ---
>  arch/arm64/boot/dts/ti/k3-am62-phycore-som.dtsi | 11 +++++++++--
>  1 file changed, 9 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-am62-phycore-som.dtsi b/arch/arm64/boot/dts/ti/k3-am62-phycore-som.dtsi
> index ac8959f3d953..8acbd4facf37 100644
> --- a/arch/arm64/boot/dts/ti/k3-am62-phycore-som.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-am62-phycore-som.dtsi
> @@ -205,6 +205,13 @@ AM62X_IOPAD(0x01f4, PIN_INPUT, 0) /* (D16) EXTINTn */
>  	};
>  };
>  
> +&a53_opp_table {
> +	opp-1400000000 {
> +		opp-hz = /bits/ 64 <1400000000>;
> +		opp-supported-hw = <0x01 0x0004>;
> +	};
> +};
> +
>  &mcu_m4fss {
>  	mboxes = <&mailbox0_cluster0 &mbox_m4_0>;
>  	memory-region = <&mcu_m4fss_dma_memory_region>,
> @@ -265,8 +272,8 @@ pmic@30 {
>  		regulators {
>  			vdd_core: buck1 {
>  				regulator-name = "VDD_CORE";
> -				regulator-min-microvolt = <750000>;
> -				regulator-max-microvolt = <750000>;
> +				regulator-min-microvolt = <850000>;
> +				regulator-max-microvolt = <850000>;
>  				regulator-boot-on;
>  				regulator-always-on;
>  			};
> -- 
> 2.25.1
> 


-- 
Regards,
Nishanth Menon
Key (0xDDB5849D1736249D) / Fingerprint: F8A2 8693 54EB 8232 17A3  1A34 DDB5 849D 1736 249D
Re: [PATCH 1/2] arm64: dts: ti: am62-phycore-som: Increase cpu frequency to 1.4 GHz
Posted by Garrett Giordano 2 months ago 
Hey Nishanth,

On 9/13/24 11:09, Nishanth Menon wrote:
> On 10:56-20240913, Garrett Giordano wrote:
>> The am625 is capable of running at 1.4 GHz when VDD_CORE is increased
>> from 0.75V to 0.85V. Here we add a 1.4 GHz node to the a53_opp_table and
>> increase the VDD_CORE voltage accordingly.
> The entire argument in introducing the 1.4Ghz overlay seems to have been
> to let users have the choice. What has changed since then?

I talked with the team and we came back with the following:

- Our default PMIC configuration changed for 850000 uV / 1.4 GHz operations

- All available users will receive a PCN on update with instructions 
towards 850000 uV / 1.4 GHz operations

These changes make this overlay obsolete.

>
> Ref: commit 7a5775a3da906dab059b8de60a2b88f6016cb4b8
>
> btw, instead of putting a patch to delete the dtso, you should
> probably consider a revert patch instead.

Thank you, I will send a v2 Monday reverting this patch instead. This 
will also address the Makefile edits.

Regards,

Garrett

>> Signed-off-by: Garrett Giordano <ggiordano@phytec.com>
>> ---
>>   arch/arm64/boot/dts/ti/k3-am62-phycore-som.dtsi | 11 +++++++++--
>>   1 file changed, 9 insertions(+), 2 deletions(-)
>>
>> diff --git a/arch/arm64/boot/dts/ti/k3-am62-phycore-som.dtsi b/arch/arm64/boot/dts/ti/k3-am62-phycore-som.dtsi
>> index ac8959f3d953..8acbd4facf37 100644
>> --- a/arch/arm64/boot/dts/ti/k3-am62-phycore-som.dtsi
>> +++ b/arch/arm64/boot/dts/ti/k3-am62-phycore-som.dtsi
>> @@ -205,6 +205,13 @@ AM62X_IOPAD(0x01f4, PIN_INPUT, 0) /* (D16) EXTINTn */
>>   	};
>>   };
>>   
>> +&a53_opp_table {
>> +	opp-1400000000 {
>> +		opp-hz = /bits/ 64 <1400000000>;
>> +		opp-supported-hw = <0x01 0x0004>;
>> +	};
>> +};
>> +
>>   &mcu_m4fss {
>>   	mboxes = <&mailbox0_cluster0 &mbox_m4_0>;
>>   	memory-region = <&mcu_m4fss_dma_memory_region>,
>> @@ -265,8 +272,8 @@ pmic@30 {
>>   		regulators {
>>   			vdd_core: buck1 {
>>   				regulator-name = "VDD_CORE";
>> -				regulator-min-microvolt = <750000>;
>> -				regulator-max-microvolt = <750000>;
>> +				regulator-min-microvolt = <850000>;
>> +				regulator-max-microvolt = <850000>;
>>   				regulator-boot-on;
>>   				regulator-always-on;
>>   			};
>> -- 
>> 2.25.1
>>
>

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