linux-kernel - RE: [EXT] Re: [PATCH] dt-bindings: usb: Add Marvell ac5

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Date: Mon, 8 Jan 2024 18:15:51 +0000
From: Elad Nachman <enachman@...vell.com>
To: Conor Dooley <conor@...nel.org>
CC: "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "krzysztof.kozlowski+dt@...aro.org" <krzysztof.kozlowski+dt@...aro.org>,
        "conor+dt@...nel.org" <conor+dt@...nel.org>,
        "devicetree@...r.kernel.org"
	<devicetree@...r.kernel.org>,
        "linux-usb@...r.kernel.org"
	<linux-usb@...r.kernel.org>,
        "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>
Subject: RE: [EXT] Re: [PATCH] dt-bindings: usb: Add Marvell ac5



> -----Original Message-----
> From: Conor Dooley <conor@...nel.org>
> Sent: Monday, January 8, 2024 8:01 PM
> To: Elad Nachman <enachman@...vell.com>
> Cc: gregkh@...uxfoundation.org; robh+dt@...nel.org;
> krzysztof.kozlowski+dt@...aro.org; conor+dt@...nel.org;
> devicetree@...r.kernel.org; linux-usb@...r.kernel.org; linux-
> kernel@...r.kernel.org
> Subject: Re: [EXT] Re: [PATCH] dt-bindings: usb: Add Marvell ac5
> 
> On Mon, Jan 08, 2024 at 05:47:24PM +0000, Elad Nachman wrote:
> >
> >
> > > -----Original Message-----
> > > From: Conor Dooley <conor@...nel.org>
> > > Sent: Monday, January 8, 2024 7:15 PM
> > > To: Elad Nachman <enachman@...vell.com>
> > > Cc: gregkh@...uxfoundation.org; robh+dt@...nel.org;
> > > krzysztof.kozlowski+dt@...aro.org; conor+dt@...nel.org;
> > > devicetree@...r.kernel.org; linux-usb@...r.kernel.org; linux-
> > > kernel@...r.kernel.org
> > > Subject: [EXT] Re: [PATCH] dt-bindings: usb: Add Marvell ac5
> > >
> > > External Email
> > >
> > > --------------------------------------------------------------------
> > > -- On Sun, Jan 07, 2024 at 05:25:57PM +0200, Elad Nachman wrote:
> > > > From: Elad Nachman <enachman@...vell.com>
> > > >
> > > > Add Marvell ac5 device tree bindings to generic EHCI.
> > > > This compatible enables the Marvell Orion platform code to
> > > > properly configure the DMA mask for the Marvell AC5 SOC.
> > > >
> > > > Signed-off-by: Elad Nachman <enachman@...vell.com>
> > >
> > > Maybe I am dumb, but I don't understand how this does what the
> > > commit message says. There's no fallback to generic-ehci or any
> > > other compatible that is already understood by the driver.
> > >
> > > What am I missing?
> >
> > Following guidance by Andrew Lunn on my mmc patchset, I have split the
> > patchset Into a single patch for dt-bindings review and another for USB
> driver review.
> 
> I don't understand that advice. dt-bindings should (almost) always be with
> the driver. Otherwise you just confuse people like me.
> 
> Perhaps Andrew meant sending dt*s* patches separately from the driver &
> bindings?

The rational was different people making the actual merge, into different intermediate git REPOs, before mering into linux-next.

> 
> Cheers,
> Conor.
> 
> >
> > The USB driver patch utilizing this new dt bindings compatible string is here:
> >
> > https://patchwork.kernel.org/project/linux-usb/patch/20240107163307.36
> > 77347-1-enachman@...vell.com/
> >
> > >
> > > > ---
> > > >  Documentation/devicetree/bindings/usb/generic-ehci.yaml | 1 +
> > > >  1 file changed, 1 insertion(+)
> > > >
> > > > diff --git
> > > > a/Documentation/devicetree/bindings/usb/generic-ehci.yaml
> > > > b/Documentation/devicetree/bindings/usb/generic-ehci.yaml
> > > > index 87986c45be88..2ed178f16a78 100644
> > > > --- a/Documentation/devicetree/bindings/usb/generic-ehci.yaml
> > > > +++ b/Documentation/devicetree/bindings/usb/generic-ehci.yaml
> > > > @@ -77,6 +77,7 @@ properties:
> > > >            - const: usb-ehci
> > > >        - enum:
> > > >            - generic-ehci
> > > > +          - marvell,ac5-ehci
> > > >            - marvell,armada-3700-ehci
> > > >            - marvell,orion-ehci
> > > >            - nuvoton,npcm750-ehci
> > > > --
> > > > 2.25.1
> > > >
> >
> > Elad.

Elad.