linux-kernel - Re: [PATCH] dt: platform: Extract device name from device tree blob

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Message-ID: <20121114092158.GA12596@gmail.com>
Date:	Wed, 14 Nov 2012 09:21:58 +0000
From:	Lee Jones <lee.jones@...aro.org>
To:	Per Forlin <per.forlin@...ricsson.com>
Cc:	grant.likely@...retlab.ca, rob.herring@...xeda.com,
	Linus Walleij <linus.walleij@...aro.org>,
	fredrik.soderstedt@...ricsson.com,
	devicetree-discuss@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dt: platform: Extract device name from device tree blob

On Mon, 12 Nov 2012, Per Forlin wrote:

> Add support to extract device name from device tree blob.
> If the property "dev-name" is set in the DTS this name will
> be used when creating the device.
> The auxdata_lookup has precedence and will override
> the "dev-name" property.
> 
> Adding support to parse DTS "dev-name" will make it possible to
> replace these kind of structures with a dev-name in the DTS.
> OF_DEV_AUXDATA("compatible", BASE_ADDRESS, "dev-name", NULL)

This patch isn't required. The correct action is to make the driver
DT aware. Also, is naming devices "devname.id" a Linux only thing,
or do other OSes do the same? If the former is true, then we
definitely do not want to add this binding.

> OF_DEV_AUXDATA("st,nomadik-gpio", 0x8012e000, "gpio.0", NULL),
> OF_DEV_AUXDATA("st,nomadik-i2c", 0x80004000, "nmk-i2c.0", NULL),

In this case, once we have added common clk functionality to our
Device Trees, these will vanish.

Kind regards,
Lee

-- 
Lee Jones
Linaro ST-Ericsson Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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