From: voice.shen@atmel•com (Bo Shen)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH v3 2/2] i2c: change id to let i2c-at91 work
Date: Tue, 16 Oct 2012 18:25:32 +0800 [thread overview]
Message-ID: <507D361C.6020403@atmel.com> (raw)
In-Reply-To: <20121016083954.GB12801@game.jcrosoft.org>
Hi J,
On 10/16/2012 16:39, Jean-Christophe PLAGNIOL-VILLARD wrote:
> On 11:13 Tue 16 Oct , Bo Shen wrote:
>> Hi J,
>>
>> On 10/15/2012 23:02, Jean-Christophe PLAGNIOL-VILLARD wrote:
>>> On 17:30 Mon 15 Oct , Bo Shen wrote:
>>>> The i2c core driver will turn the platform device ID to busnum
>>>> When using platfrom device ID as -1, it means dynamically assigned
>>>> the busnum. When writing code, we need to make sure the busnum,
>>>> and call i2c_register_board_info(int busnum, ...) to register device
>>>> if using -1, we do not know the value of busnum
>>>>
>>>> In order to solve this issue, set the platform device ID as a fix number
>>>> Here using 0 to match the busnum used in i2c_regsiter_board_info()
>>>>
>>>> Signed-off-by: Bo Shen <voice.shen@atmel•com>
>>>> ---
>>>
>>> can you check when this append for the first time to schedule a patch for stable too
>>
>> OK. I will resend it and add linux stable into the cc list.
> no this not how it work
>
> I ask you to check which patch add the regression and then when this is
> applied in the kernel we will request greg to apply it too to the stable
The code is using id = -1 appear 4 years ago. And after dig, I don't
find which patch cause this the regression.
Sorry for that.
> But before do that you MUST foudn the commit responsible
>
> Best Regards,
> J.
>
next prev parent reply other threads:[~2012-10-16 10:25 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-15 9:30 [PATCH v3 0/2] i2c: change id to let i2c-gpio work Bo Shen
2012-10-15 9:30 ` [PATCH v3 1/2] " Bo Shen
2012-10-15 9:30 ` [PATCH v3 2/2] i2c: change id to let i2c-at91 work Bo Shen
2012-10-15 15:02 ` Jean-Christophe PLAGNIOL-VILLARD
2012-10-16 3:13 ` Bo Shen
2012-10-16 8:39 ` Jean-Christophe PLAGNIOL-VILLARD
2012-10-16 10:25 ` Bo Shen [this message]
2012-10-16 11:10 ` Jean-Christophe PLAGNIOL-VILLARD
2012-10-17 2:19 ` Bo Shen
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