linux-kernel - Re: [PATCH 2/8] arm64: dts: s32g274-rd2: Enable the STM timers

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Message-ID: <87d40626-8789-4e71-8ac3-fa8fff0a7435@linaro.org>
Date: Wed, 30 Jul 2025 23:15:54 +0200
From: Daniel Lezcano <daniel.lezcano@...aro.org>
To: Frank Li <Frank.li@....com>
Cc: mbrugger@...e.com, chester62515@...il.com,
 ghennadi.procopciuc@....nxp.com, shawnguo@...nel.org,
 s.hauer@...gutronix.de, s32@....com, kernel@...gutronix.de,
 festevam@...il.com, robh@...nel.org, krzk+dt@...nel.org,
 conor+dt@...nel.org, linux-arm-kernel@...ts.infradead.org,
 imx@...ts.linux.dev, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org,
 Ghennadi Procopciuc <ghennadi.procopciuc@....com>,
 Thomas Fossati <thomas.fossati@...aro.org>
Subject: Re: [PATCH 2/8] arm64: dts: s32g274-rd2: Enable the STM timers

On 30/07/2025 22:21, Frank Li wrote:
> On Wed, Jul 30, 2025 at 09:50:15PM +0200, Daniel Lezcano wrote:
>> Enable the timers STM0 -> STM3 on the s32g274-rd2
>>
>> The platform has 4 CPUs and the Linux STM timer driver is per
>> CPU. Enable 4 timers which will be used, other timers are useless for
>> the Linux kernel and there is no benefit to enable them.
> 
> S32 have not ARM local timer? It is quite strange!

I'm not saying there is no architected timers but there are the STM. May 
be I can reword the sentence to prevent this ambiguity.

>> Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
>> Cc: Ghennadi Procopciuc <ghennadi.procopciuc@....com>
>> Cc: Thomas Fossati <thomas.fossati@...aro.org>
>> ---
>>   arch/arm64/boot/dts/freescale/s32g274a-rdb2.dts | 16 ++++++++++++++++
>>   1 file changed, 16 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/freescale/s32g274a-rdb2.dts b/arch/arm64/boot/dts/freescale/s32g274a-rdb2.dts
>> index b5ba51696f43..505776d19151 100644
>> --- a/arch/arm64/boot/dts/freescale/s32g274a-rdb2.dts
>> +++ b/arch/arm64/boot/dts/freescale/s32g274a-rdb2.dts
>> @@ -40,6 +40,22 @@ &uart1 {
>>   	status = "okay";
>>   };
>>
>> +&stm0 {
>> +	status = "okay";
>> +};
>> +
>> +&stm1 {
>> +	status = "okay";
>> +};
>> +
>> +&stm2 {
>> +	status = "okay";
>> +};
>> +
>> +&stm3 {
>> +	status = "okay";
>> +};
>> +
>>   &usdhc0 {
>>   	pinctrl-names = "default", "state_100mhz", "state_200mhz";
>>   	pinctrl-0 = <&pinctrl_usdhc0>;
>> --
>> 2.43.0
>>


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