Re: [PATCH 3/3] arm64: dts: amlogic: a4: add power domain controller node

Xianwei Zhao
2024-05-28T09:01:05Z

Hi Neil,
Thanks for your quickly reply.

On 2024/5/28 16:46, Neil Armstrong wrote:
> [ EXTERNAL EMAIL ]
>
> On 28/05/2024 10:39, Xianwei Zhao via B4 Relay wrote:
>> From: Xianwei Zhao <xianwei.zhao@amlogic.com>
>>
>> Add power domain controller node for Amlogic A4 SoC
>>
>> Signed-off-by: Xianwei Zhao <xianwei.zhao@amlogic.com>
>> ---
>>   arch/arm64/boot/dts/amlogic/amlogic-a4-common.dtsi | 4 ++++
>>   arch/arm64/boot/dts/amlogic/amlogic-a4.dtsi        | 5 +++++
>>   2 files changed, 9 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/amlogic/amlogic-a4-common.dtsi
>> b/arch/arm64/boot/dts/amlogic/amlogic-a4-common.dtsi
>> index b6106ad4a072..eebde77ae5b4 100644
>> --- a/arch/arm64/boot/dts/amlogic/amlogic-a4-common.dtsi
>> +++ b/arch/arm64/boot/dts/amlogic/amlogic-a4-common.dtsi
>> @@ -27,6 +27,10 @@ xtal: xtal-clk {
>>               #clock-cells = <0>;
>>       };
>>
>> +     sm: secure-monitor {
>> +             compatible = "amlogic,meson-gxbb-sm";
>> +     };
>> +
>>       soc {
>>               compatible = "simple-bus";
>>               #address-cells = <2>;
>> diff --git a/arch/arm64/boot/dts/amlogic/amlogic-a4.dtsi
>> b/arch/arm64/boot/dts/amlogic/amlogic-a4.dtsi
>> index 73ca1d7eed81..917c05219b9c 100644
>> --- a/arch/arm64/boot/dts/amlogic/amlogic-a4.dtsi
>> +++ b/arch/arm64/boot/dts/amlogic/amlogic-a4.dtsi
>> @@ -37,4 +37,9 @@ cpu3: cpu@3 {
>>                       enable-method = "psci";
>>               };
>>       };
>> +
>> +     pwrc: power-controller {
>> +             compatible = "amlogic,a4-pwrc";
>> +             #power-domain-cells = <1>;
>> +     };
>
> pwrc is supposed to be a child of secure-monitor.
>
Considered writing it like this when I wrote this.

Here are two approaches: one is to include secure-monitor in the comm
dtsi and fill power-controller by aliases in dtsi of each chip, while
the other is to directly include secure-monitor in the dtsi of each
chip. Which one do you suggest?

> Neil
>
>>   };
>>