linux-kernel - Re: [PATCH 09/33] ARM: ux500: Supply the I2C clocks lookup to the DBX500 DT

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Message-ID: <20130822211912.GE31036@pengutronix.de>
Date:	Thu, 22 Aug 2013 23:19:12 +0200
From:	Sascha Hauer <s.hauer@...gutronix.de>
To:	Lee Jones <lee.jones@...aro.org>
Cc:	Mark Rutland <mark.rutland@....com>,
	Linus Walleij <linus.walleij@...aro.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Arnd Bergmann <arnd@...db.de>,
	Linus WALLEIJ <linus.walleij@...ricsson.com>,
	Srinidhi KASAGAR <srinidhi.kasagar@...ricsson.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [PATCH 09/33] ARM: ux500: Supply the I2C clocks lookup to the
 DBX500 DT

On Thu, Aug 22, 2013 at 04:41:16PM +0100, Lee Jones wrote:
> 
> When most of the other clocks that we deal with are being requested,
> they rely on being index zero:
> 
>   drivers/i2c/busses/i2c-nomadik.c: dev->clk = clk_get(&adev->dev, NULL);

Once a device has more than a single clock all clocks should have a
connection id. clk_get(dev, NULL) should only be used for single clock
devices. Look at drivers/clk/clkdev.c, there's some fuzzy matching
involved when you pass NULL as connection id.

Sascha

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