linux-kernel - Re: [PATCH v3 08/12] Documentation: bindings: add doc for the USB2 ChipIdea USB driver

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 16 Jul 2014 10:39:36 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	linux-arm-kernel@...ts.infradead.org
Cc:	Antoine Ténart 
	<antoine.tenart@...e-electrons.com>,
	sebastian.hesselbarth@...il.com, Peter.Chen@...escale.com,
	balbi@...com, p.zabel@...gutronix.de,
	thomas.petazzoni@...e-electrons.com, zmxu@...vell.com,
	devicetree@...r.kernel.org, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org, alexandre.belloni@...e-electrons.com,
	jszhang@...vell.com
Subject: Re: [PATCH v3 08/12] Documentation: bindings: add doc for the USB2 ChipIdea USB driver

On Wednesday 16 July 2014 10:26:02 Antoine Ténart wrote:
> +
> +Required properties:
> +- compatible: should be "chipidea,usb2"
> +- reg: base address and length of the registers
> +- interrupts: interrupt for the USB controller
> +
> +Optional properties:
> +- clocks: reference to the USB clock
> +- usb-phy: reference to the USB PHY

I think the phy reference should use the standard phy binding, using
"phys" property to refer to a node that has a "#phy-cells" property.

It seems the code gets this right, but just the documentation is wrong.

> +- vbus-supply: reference to the VBUS regulator
> +- dma-mask: DMA bit mask

No. Do not use "dma-mask" as a property, that is a pure Linux specific
concept. The DT way to express this is to use the 'dma-ranges' property
in the device's parent to describe any bus-related restrictions, and
for the driver to ask for a mask that matches what the hardware is
capable of (which may be smaller or larger than what the bus supports).

	Arnd
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/