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

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Message-ID: <20190403092054.d26pmbngconkn3hx@verge.net.au>
Date:   Wed, 3 Apr 2019 11:20:55 +0200
From:   Simon Horman <horms@...ge.net.au>
To:     Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>
Cc:     kishon@...com, robh+dt@...nel.org, mark.rutland@....com,
        linux-kernel@...r.kernel.org, devicetree@...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 Shimoda-san,

On Mon, Apr 01, 2019 at 09:01:21PM +0900, Yoshihiro Shimoda wrote:
> To have the detailed property on each PHY specifier, this patch revices
> 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>.

The driver currently supports <0> and with this changeset continues to do
so. I also assume there are existing DTs that use <0>. Would it be
better to describe this as deprecated?

> +- #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:
> +- 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
>