linux-kernel - Re: [PATCH] i2c: omap: adopt pinctrl support

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Date:	Wed, 17 Oct 2012 22:05:50 +0530
From:	Shubhrajyoti Datta <omaplinuxkernel@...il.com>
To:	Sebastien Guiriec <s-guiriec@...com>
Cc:	Tony Lindgren <tony@...mide.com>,
	Jean Delvare <khali@...ux-fr.org>,
	Ben Dooks <ben-linux@...ff.org>,
	Wolfram Sang <w.sang@...gutronix.de>,
	linux-omap@...r.kernel.org, linux-i2c@...r.kernel.org,
	linux-kernel@...r.kernel.org, Felipe Balbi <balbi@...com>,
	Shubhrajyoti Datta <shubhrajyoti@...com>
Subject: Re: [PATCH] i2c: omap: adopt pinctrl support

On Tue, Oct 16, 2012 at 8:53 PM, Sebastien Guiriec <s-guiriec@...com> wrote:
> Some GPIO expanders need some early pin control muxing. Due to
> legacy boards sometimes the driver uses subsys_initcall instead of
> module_init. This patch takes advantage of defer probe feature
> and pin control in order to wait until pin control probing before
> GPIO driver probing. It has been tested on OMAP5 board with TCA6424
> driver.
>
> log:
>
> [0.482299] omap_i2c i2c.15: could not find pctldev for node /ocp/pinmux@...0
> 2840/pinmux_i2c5_pins, deferring probe
> [0.482330] platform i2c.15: Driver omap_i2c requests probe deferral
> [0.484466] Advanced Linux Sound Architecture Driver Initialized.
>
> [4.746917] omap_i2c i2c.15: bus 4 rev2.4.0 at 100 kHz
> [4.755279] gpiochip_find_base: found new base at 477
> [4.761169] gpiochip_add: registered GPIOs 477 to 500 on device: tca6424a
>
Thanks,

Acked-by: Shubhrajyoti D <shubhrajyoti@...com>
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