linux-kernel - Re: [PATCH] arm: dts: omap4-sdp: Add I2c pinctrl data

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Date:	Wed, 30 Jan 2013 14:18:31 +0530
From:	Santosh Shilimkar <santosh.shilimkar@...com>
To:	"Kumar, Anil" <anilkumar.v@...com>
CC:	"Poddar, Sourav" <sourav.poddar@...com>,
	"Coelho, Luciano" <coelho@...com>,
	"Cousson, Benoit" <b-cousson@...com>,
	"tony@...mide.com" <tony@...mide.com>,
	"devicetree-discuss@...ts.ozlabs.org" 
	<devicetree-discuss@...ts.ozlabs.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Balbi, Felipe" <balbi@...com>,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"Vishwanathrao Badarkhe, Manish" <manishv.b@...com>
Subject: Re: [PATCH] arm: dts: omap4-sdp: Add I2c pinctrl data

On Wednesday 30 January 2013 02:13 PM, Kumar, Anil wrote:
> Hi Sourav,
>
> On Wed, Jan 30, 2013 at 12:10:18, Poddar, Sourav wrote:
>> Hi Luciano,
>> On Wednesday 30 January 2013 11:55 AM, Luciano Coelho wrote:
>>> Hi Sourav,
>>>
>>> On Mon, 2013-01-28 at 16:47 +0530, Sourav Poddar wrote:
>>>> Booting 3.8-rc4 om omap 4430sdp results in the following error
>>>>
>>>> omap_i2c 48070000.i2c: did not get pins for i2c error: -19
>>>> [    1.024261] omap_i2c 48070000.i2c: bus 0 rev0.12 at 100 kHz
>>>> [    1.030181] omap_i2c 48072000.i2c: did not get pins for i2c error: -19
>>>> [    1.037384] omap_i2c 48072000.i2c: bus 1 rev0.12 at 400 kHz
>>>> [    1.043762] omap_i2c 48060000.i2c: did not get pins for i2c error: -19
>>>> [    1.050964] omap_i2c 48060000.i2c: bus 2 rev0.12 at 100 kHz
>>>> [    1.056823] omap_i2c 4807a000.i2c: did not get pins for i2c error: -19
>>>> [    1.064025] omap_i2c 4807a000.i2c: bus 3 rev0.12 at 400 kHz
>>>>
>>>> This happens because omap4 dts file is not adapted to use i2c through pinctrl
>>>> framework. Populating i2c pinctrl data to get rid of the error.
>>>>
>>>> Tested on omap4430 sdp with 3.8-rc4 kernel.
>>>>
>>>> Signed-off-by: Sourav Poddar <sourav.poddar@...com>
>>>> Reported-by: Santosh Shilimkar <santosh.shilimkar@...com>
>>>> ---
>>> Could you do the same thing for panda? I'm getting the same kind of
>>> errors with it:
>
> omap4 uses pinctrl-single driver for pinmux with DT. Currently
> pinctrl-single driver is getting up after I2C driver. So I2c cannot
> use pinctrl. The below patch solve this issue
>
> http://www.gossamer-threads.com/lists/linux/kernel/1669067
>
> Can you try with this ? it may solve it.
>
OMAP i2c driver already takes care of -EPROBE_DEFER. The issue
as you see from the log is not probe failure but missing the
pin information in DT blob. And thats what patch does.

Regards
santosh

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