linux-kernel - Re: [PATCH] arm64: dts: ti: k3-am65-mcu: Add RTI watchdog entry

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Date:   Thu, 11 Mar 2021 14:01:54 +0100
From:   Jan Kiszka <jan.kiszka@...mens.com>
To:     Nishanth Menon <nm@...com>, "Bajjuri, Praneeth" <praneeth@...com>
Cc:     Tero Kristo <kristo@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        devicetree <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] arm64: dts: ti: k3-am65-mcu: Add RTI watchdog entry

On 11.03.21 13:56, Nishanth Menon wrote:
> On 19:36-20210310, Bajjuri, Praneeth wrote:
>>
>>
>> On 2/20/2021 6:49 AM, Jan Kiszka wrote:
>>> From: Jan Kiszka <jan.kiszka@...mens.com>
>>>
>>> Add the DT entry for a watchdog based on RTI1.
>>>
>>> On SR1.0 silicon, it requires additional firmware on the MCU R5F cores
>>> to handle the expiry, e.g. https://github.com/siemens/k3-rti-wdt. As
>>> this firmware will also lock the power domain to protect it against
>>> premature shutdown, mark it shared.
>>>
>>> Signed-off-by: Jan Kiszka <jan.kiszka@...mens.com>
>>
>> Acked-by: Praneeth Bajjuri <praneeth@...com>
>>
>>> ---
>>>   arch/arm64/boot/dts/ti/k3-am65-mcu.dtsi | 9 +++++++++
>>>   1 file changed, 9 insertions(+)
>>>
>>> diff --git a/arch/arm64/boot/dts/ti/k3-am65-mcu.dtsi b/arch/arm64/boot/dts/ti/k3-am65-mcu.dtsi
>>> index 7454c8cec0cc..903796bf7d64 100644
>>> --- a/arch/arm64/boot/dts/ti/k3-am65-mcu.dtsi
>>> +++ b/arch/arm64/boot/dts/ti/k3-am65-mcu.dtsi
>>> @@ -308,4 +308,13 @@ mcu_r5fss0_core1: r5f@...00000 {
>>>   			ti,loczrama = <1>;
>>>   		};
>>>   	};
>>> +
>>> +	mcu_rti1: rti@...10000 {
> 
> Jan, I was about to pick up the patches and was running through
> my sanity checks and the following caught my eye with dtbs_check
> (dtschema is at 2021.2.1) test against next-20210311
> 
> /workdir/arch/arm64/boot/dts/ti/k3-am654-base-board.dt.yaml: rti@...10000: $nodename:0: 'rti@...10000' does not match '^watchdog(@.*|-[0-9a-f])?$'
> 
> Please use watchdog@...10000 instead of rti@...10000
> 
> Since this is a minor change, I have done this change locally. let me
> know if you have an issue and I can drop it off my branch for a new
> version.
> 

That's fine, thanks for fixing up - still learning such details.

Jan

-- 
Siemens AG, T RDA IOT
Corporate Competence Center Embedded Linux