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    SubjectRe: [PATCH 0/3] Suspending i.MX watchdog in WAIT mode
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    Hi Guenter,

    On 19. 10. 22 17:30, Guenter Roeck wrote:
    > On Wed, Oct 19, 2022 at 01:17:11PM +0200, 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.
    >
    > I think that needs to be validated using the "compatible" property;
    > it should not be possible to set/accept the new flag for devices
    > which don't support it.

    Ok, I can add that to a v2.

    Thanks,
    Andrej

    >
    > Thanks,
    > Guenter
    >

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