linux-kernel - RE: [PATCH 1/3] dt-bindings: phy: rcar-gen3-phy-usb2: Revise #phy-cells property

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Date:   Mon, 8 Apr 2019 06:22:14 +0000
From:   Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>
To:     Fabrizio Castro <fabrizio.castro@...renesas.com>,
        "kishon@...com" <kishon@...com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "mark.rutland@....com" <mark.rutland@....com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-renesas-soc@...r.kernel.org" 
        <linux-renesas-soc@...r.kernel.org>
Subject: RE: [PATCH 1/3] dt-bindings: phy: rcar-gen3-phy-usb2: Revise
 #phy-cells property

Hi Fabrizio-san,

Thank you for your review!

> From: Fabrizio Castro, Sent: Wednesday, April 3, 2019 7:35 PM
> 
> Hello Yoshihiro-san,
> 
> Thank you for your patch!
> 
> > From: linux-kernel-owner@...r.kernel.org <linux-kernel-owner@...r.kernel.org> On Behalf Of Yoshihiro Shimoda
> > Sent: 01 April 2019 13:01
> > Subject: [PATCH 1/3] dt-bindings: phy: rcar-gen3-phy-usb2: Revise #phy-cells property
> >
> > To have the detailed property on each PHY specifier, this patch revices
> 
> s/revices/revises/g

Oops! I'll fix it in v2.

> > the #phy-cells property.
> >
> > Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>
> > ---
> >  Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt | 7 ++++++-
> >  1 file changed, 6 insertions(+), 1 deletion(-)
> >
> > diff --git a/Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt
> b/Documentation/devicetree/bindings/phy/rcar-gen3-
> > phy-usb2.txt
> > index ad9c290..7f0d4bf 100644
> > --- a/Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt
> > +++ b/Documentation/devicetree/bindings/phy/rcar-gen3-phy-usb2.txt
> > @@ -27,7 +27,12 @@ Required properties:
> >
> >  - reg: offset and length of the partial USB 2.0 Host register block.
> >  - clocks: clock phandle and specifier pair(s).
> > -- #phy-cells: see phy-bindings.txt in the same directory, must be <0>.
> > +- #phy-cells: see phy-bindings.txt in the same directory, must be <1>.
> > +
> > +The phandle's argument in the PHY specifier is the INT_STATUS bit of controller:
> 
> From the driver we are also looking for value 0, as in rcar_gen3_get_dr_mode we
> have a for loop that starts from 0, and we call of_usb_get_dr_mode_by_phy with
> arg0 == 0

This is backward compatibility for old DTS file (phy-cells = 0).

> why are we leaving this out from this list?

This is because I don't assume any device nodes doesn't have such a property
(the bit 0 of INT_STATUS).

Best regards,
Yoshihiro Shimoda

> Thanks,
> Fab
> 
> > +- 1 = USBH_INTA (OHCI)
> > +- 2 = USBH_INTB (EHCI)
> > +- 3 = UCOM_INT (OTG and BC)
> >
> >  Optional properties:
> >  To use a USB channel where USB 2.0 Host and HSUSB (USB 2.0 Peripheral) are
> > --
> > 2.7.4