linux-kernel - Re: [PATCH v4 5/7] arm64: dts: ti: k3-j784s4-mcu: Add the main domain watchdog instances

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Message-ID: <9fef2589-c864-bcb9-be9d-435d6abd470c@ti.com>
Date:   Mon, 25 Sep 2023 21:03:30 +0530
From:   "J, KEERTHY" <j-keerthy@...com>
To:     Nishanth Menon <nm@...com>
CC:     <robh+dt@...nel.org>, <vigneshr@...com>, <conor+dt@...nel.org>,
        <kristo@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
        <u-kumar1@...com>, <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 5/7] arm64: dts: ti: k3-j784s4-mcu: Add the main domain
 watchdog instances



On 9/25/2023 6:49 PM, Nishanth Menon wrote:
> On 13:43-20230925, Keerthy wrote:
>> There are totally 2 instances of watchdog module in MCU domain.
>>
>> Signed-off-by: Keerthy <j-keerthy@...com>
>> ---
>>   .../boot/dts/ti/k3-j784s4-mcu-wakeup.dtsi     | 20 +++++++++++++++++++
>>   1 file changed, 20 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/ti/k3-j784s4-mcu-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-j784s4-mcu-wakeup.dtsi
>> index a7b5c4cb7d3e..0b7cc277a567 100644
>> --- a/arch/arm64/boot/dts/ti/k3-j784s4-mcu-wakeup.dtsi
>> +++ b/arch/arm64/boot/dts/ti/k3-j784s4-mcu-wakeup.dtsi
>> @@ -714,4 +714,24 @@
>>   		ti,esm-pins = <63>;
>>   		bootph-pre-ram;
>>   	};
>> +
>> +	mcu_watchdog0: watchdog@...00000 {
>> +		compatible = "ti,j7-rti-wdt";
>> +		reg = <0x00 0x40600000 0x00 0x100>;
>> +		clocks = <&k3_clks 367 1>;
>> +		power-domains = <&k3_pds 367 TI_SCI_PD_EXCLUSIVE>;
>> +		assigned-clocks = <&k3_clks 367 0>;
>> +		assigned-clock-parents = <&k3_clks 367 4>;
>> +		status = "disabled";
>> +	};
>> +
>> +	mcu_watchdog1: watchdog@...10000 {
>> +		compatible = "ti,j7-rti-wdt";
>> +		reg = <0x00 0x40610000 0x00 0x100>;
>> +		clocks = <&k3_clks 368 1>;
>> +		power-domains = <&k3_pds 368 TI_SCI_PD_EXCLUSIVE>;
>> +		assigned-clocks = <&k3_clks 368 0>;
>> +		assigned-clock-parents = <&k3_clks 368 4>;
>> +		status = "disabled";
> 
> Explain in commit message as to why these are disabled. I believe it is
> because this RTI instances are tightly coupled to the micro
> controllers. but that information needs to be documented.

Sure. I will add that to the commit message.

>> +	};
>>   };
>> -- 
>> 2.17.1
>>
>