linux-kernel - Re: [PATCH 4/4] arm64: dts: ti: k3-j7200-main: Add the MAIN domain watchdog instances

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Date: Wed, 10 Apr 2024 11:39:43 +0530
From: Neha Malcom Francis <n-francis@...com>
To: "Kumar, Udit" <u-kumar1@...com>, <robh@...nel.org>, <conor+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <vigneshr@...com>, <nm@...com>
CC: <linux-arm-kernel@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <kristo@...nel.org>
Subject: Re: [PATCH 4/4] arm64: dts: ti: k3-j7200-main: Add the MAIN domain
 watchdog instances

Hi Udit

On 10/04/24 11:35, Kumar, Udit wrote:
> Hi Neha
> 
> On 3/26/2024 5:57 PM, Neha Malcom Francis wrote:
>> There are 4 watchdog instances in the MAIN domain:
>>     * one each for the 2 A72 cores
>>     * one each for the 2 R5F cores
>>
>> Currently, the devicetree only describes watchdog instances for the A72
>> cores and enables them. Describe the remaining but reserve them as they
>> will be used by their respective firmware.
>>
>> Signed-off-by: Neha Malcom Francis <n-francis@...com>
>> ---
>>   arch/arm64/boot/dts/ti/k3-j7200-main.dtsi | 27 +++++++++++++++++++++++
>>   1 file changed, 27 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi 
>> b/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi
>> index 657f9cc9f4ea..c448c2218e23 100644
>> --- a/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi
>> +++ b/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi
>> @@ -1254,6 +1254,33 @@ watchdog1: watchdog@...0000 {
>>           assigned-clock-parents = <&k3_clks 253 5>;
>>       };
>> +    /*
>> +     * The following RTI instances are coupled with MCU R5Fs so
>> +     * keeping them reserved as these will be used by their respective
>> +     * firmware
>> +     */
>> +    watchdog2: watchdog@...0000 {
>> +        compatible = "ti,j7-rti-wdt";
>> +        reg = <0x00 0x23c0000 0x00 0x100>;
>> +        clocks = <&k3_clks 258 1>;
>> +        power-domains = <&k3_pds 258 TI_SCI_PD_EXCLUSIVE>;
>> +        assigned-clocks = <&k3_clks 258 1>;
>> +        assigned-clock-parents = <&k3_clks 258 5>;
>> +        /* reserved for MAIN_R5F0_0 */
>> +        status = "reserved";
>> +    };
>> +
>> +    watchdog3: watchdog@...0000 {
>> +        compatible = "ti,j7-rti-wdt";
>> +        reg = <0x00 0x23d0000 0x00 0x100>;
>> +        clocks = <&k3_clks 259 1>;
>> +        power-domains = <&k3_pds 259 TI_SCI_PD_EXCLUSIVE>;
>> +        assigned-clocks = <&k3_clks 259 1>;
>> +        assigned-clock-parents = <&k3_clks 259 5>;
>> +        /* reserved for MAIN_R5F0_1 */
>> +        status = "reserved";
>> +    };
>> +
> 
> Please see, if this make more sense to have label as watchdog28 and watchdog29, 
> to align with TRM.

Yes I will change all the patches in the series to align with TRM numbering.

> 
> Also request to add mcu domain 2 watchdog as well.

Oh I had missed that out, will add it in v2.

> 
> 
>>       main_timer0: timer@...0000 {
>>           compatible = "ti,am654-timer";
>>           reg = <0x00 0x2400000 0x00 0x400>;

-- 
Thanking You
Neha Malcom Francis