linux-kernel - Re: [PATCH 1/3] dt-bindings: serial: 8250_omap: Update wakeup-source type property

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Message-ID: <20250905184817.7kdhroadthzesnaj@lcpd911>
Date: Sat, 6 Sep 2025 00:18:17 +0530
From: Dhruva Gole <d-gole@...com>
To: Conor Dooley <conor@...nel.org>
CC: Kendall Willis <k-willis@...com>, <gregkh@...uxfoundation.org>,
        <jirislaby@...nel.org>, <robh@...nel.org>, <krzk+dt@...nel.org>,
        <conor+dt@...nel.org>, <vigneshr@...com>,
        <linux-kernel@...r.kernel.org>, <linux-serial@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <vishalm@...com>, <sebin.francis@...com>,
        <msp@...libre.com>, <khilman@...libre.com>, <a-kaur@...com>,
        <john.ogness@...utronix.de>, <andriy.shevchenko@...ux.intel.com>,
        <yujiaoliang@...o.com>, <b-liu@...com>, <u.kleine-koenig@...libre.com>
Subject: Re: [PATCH 1/3] dt-bindings: serial: 8250_omap: Update wakeup-source
 type property

On Sep 05, 2025 at 19:38:00 +0100, Conor Dooley wrote:
> On Thu, Sep 04, 2025 at 04:24:53PM -0500, Kendall Willis wrote:
> > Allow the wakeup-source property to be either of type boolean or of a
> > phandle array. The phandle array points to the system idle states that the
> > UART can wakeup the system from.
> > 
> > Signed-off-by: Kendall Willis <k-willis@...com>
> > ---
> >  Documentation/devicetree/bindings/serial/8250_omap.yaml | 8 +++++++-
> >  1 file changed, 7 insertions(+), 1 deletion(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/serial/8250_omap.yaml b/Documentation/devicetree/bindings/serial/8250_omap.yaml
> > index 1859f71297ff2..851a5291b4be4 100644
> > --- a/Documentation/devicetree/bindings/serial/8250_omap.yaml
> > +++ b/Documentation/devicetree/bindings/serial/8250_omap.yaml
> > @@ -69,7 +69,13 @@ properties:
> >    clock-frequency: true
> >    current-speed: true
> >    overrun-throttle-ms: true
> > -  wakeup-source: true
> > +
> > +  wakeup-source:
> > +    oneOf:
> > +      - type: boolean
> > +      - $ref: /schemas/types.yaml#/definitions/phandle-array
> > +        description:
> > +          List of phandles to system idle states in which UARTs can wakeup the system.
> 
> Is there a single other instance of the wakeup-source property being
> used like this?

I think there's an ongoing thread here [1],
[1] https://lore.kernel.org/all/20250820-topic-mcan-wakeup-source-v6-12-v9-1-0ac13f2ddd67@baylibre.com/


-- 
Best regards,
Dhruva Gole
Texas Instruments Incorporated