linux-kernel - Re: [PATCH 0/3] Suspending i.MX watchdog in WAIT mode

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Message-ID: <825ad7f9-7f8b-9670-afdf-91df0ead8773@norik.com>
Date:   Thu, 20 Oct 2022 14:16:31 +0200
From:   Andrej Picej <andrej.picej@...ik.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        linux-watchdog@...r.kernel.org
Cc:     shawnguo@...nel.org, linux@...ck-us.net,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-imx@....com, festevam@...il.com,
        kernel@...gutronix.de, s.hauer@...gutronix.de,
        wim@...ux-watchdog.org, robh+dt@...nel.org
Subject: Re: [PATCH 0/3] Suspending i.MX watchdog in WAIT mode



On 20. 10. 22 14:04, Krzysztof Kozlowski wrote:
> On 20/10/2022 01:49, Andrej Picej wrote:
>> Hi Krzysztof,
>>
>> On 19. 10. 22 17:46, Krzysztof Kozlowski wrote:
>>> On 19/10/2022 07:17, Andrej Picej wrote:
>>>> The i.MX6 watchdog can't be stopped once started. This means that
>>>> special hardware suspend needs to be configured when the device enters
>>>> low-power modes.
>>>> Usually i.MX devices have two bits which deal with this:
>>>> - WDZST bit disables the timer in "deeper" low power modes and
>>>> - WDW bit disables the timer in "WAIT" mode which corresponds with
>>>> Linux's "freeze" low-power mode.
>>>>
>>>> WDZST bit support is already in place since 1a9c5efa576e ("watchdog: imx2_wdt: disable watchdog timer during low power mode").
>>>> WDW bit is not common for all imx2-wdt supported devices, therefore use
>>>> a new device-tree property "fsl,suspend-in-wait" which suspends the
>>>> watchdog in "WAIT" mode.
>>>>
>>>> Andrej Picej (3):
>>>>     watchdog: imx2_wdg: suspend watchdog in WAIT mode
>>>>     dt-bindings: watchdog: fsl-imx: document suspend in wait mode
>>>>     ARM: dts: imx6ul/ull: suspend i.MX6UL watchdog in wait mode
>>>>
>>>>    .../devicetree/bindings/watchdog/fsl-imx-wdt.yaml          | 5 +++++
>>>
>>> Please use scripts/get_maintainers.pl to get a list of necessary people
>>> and lists to CC.  It might happen, that command when run on an older
>>> kernel, gives you outdated entries.  Therefore please be sure you base
>>> your patches on recent Linux kernel.
>>
>> I thought I did. I run that script on linux-watchdog.git, master branch.
>> I thought I should base my patches meant for watchdog subsystem there?
> 
> Maintainer's tree should be fine, but then the issue is somewhere else,
> because your CC list was not complete.
> 

Ok I see that two email addresses were not added. Sorry for that. I will 
make sure that the CC list is complete next time.

Thanks,
Andrej