linux-kernel - Re: [PATCH v2 4/6] dt-bindings: Consolidate ChipIdea USB ci13xxx bindings

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Date:	Thu, 21 May 2015 09:46:01 +0800
From:	Peter Chen <peter.chen@...escale.com>
To:	Rob Herring <robh@...nel.org>
CC:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Kishon Vijay Abraham I <kishon@...com>,
	<linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<devicetree@...r.kernel.org>, Arnd Bergmann <arnd@...db.de>,
	Alan Stern <stern@...land.harvard.edu>,
	"Ivan T. Ivanov" <iivanov@...sol.com>,
	"Daniel Tang" <dt.tangr@...il.com>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	"Kumar Gala" <galak@...eaurora.org>
Subject: Re: [PATCH v2 4/6] dt-bindings: Consolidate ChipIdea USB ci13xxx
 bindings

On Tue, May 19, 2015 at 09:10:03PM -0500, Rob Herring wrote:
> Combine the ChipIdea USB binding into a single document to reduce
> duplication and fragmentation. This marks use of the old PHY bindings as
> deprecated. Future compatible bindings should use generic PHY binding.

Thanks, Rob. These are what I plan to do in future too.

> diff --git a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
> index 27f8b1e..f074827 100644
> --- a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
> +++ b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
> @@ -1,15 +1,35 @@
>  * USB2 ChipIdea USB controller for ci13xxx
>  
>  Required properties:
> -- compatible: should be "chipidea,usb2"
> +- compatible: should be one of:
> +	"fsl,imx27-usb"
> +	"lsi,zevio-usb"
> +	"qcom,ci-hdrc"
> +	"chipidea,usb2"
>  - reg: base address and length of the registers
>  - interrupts: interrupt for the USB controller
>  
> +Recommended properies:
> +- phy_type: the type of the phy connected to the core. Should be one
> +  of "utmi", "utmi_wide", "ulpi", "serial" or "hsic". Without this
> +  property the PORTSC register won't be touched.
> +- dr_mode: One of "host", "peripheral" or "otg". Defaults to "otg"
> +
> +Deprecated properties:
> +- usb-phy:      phandle for the PHY device. Use "phys" instead.
> +- fsl,usbphy: phandle of usb phy that connects to the port. Use "phys" instead.
> +
>  Optional properties:
>  - clocks: reference to the USB clock
>  - phys: reference to the USB PHY
>  - phy-names: should be "usb-phy"
>  - vbus-supply: reference to the VBUS regulator
> +- fsl,usbmisc: phandler of non-core register device, with one argument
> +  that indicate usb controller index
> +- disable-over-current: disable over current detect
> +- external-vbus-divider: enables off-chip resistor divider for Vbus

The above property is only for fsl, we may need to differentiate
generic and vendor properties for reader.

-- 

Best Regards,
Peter Chen
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