[U-Boot] [PATCH v2 1/2] i2c: sh_i2c: bugfix: i2c probe command does not work

From: Tetsuyuki Kobayashi <koba@kmckk.co.jp>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH v2 1/2] i2c: sh_i2c: bugfix: i2c probe command does not work
Date: Mon, 14 Apr 2014 15:49:54 +0900	[thread overview]
Message-ID: <534B8512.70800@kmckk.co.jp> (raw)
In-Reply-To: <CABMQnVJv+NRa91mkdLi+Vy8GhF5AbmxJqJ_=9GE8twV5uTcCNA@mail.gmail.com>

Hello, Nobihiro, Heiko

I found bug in this patch.

When I change read length 0 to 1, I have to change buffer address NULL 
to some valid memory address.

I am going to v3 patch as soon as possible.

(2014/04/14 15:09), Nobuhiro Iwamatsu wrote:
> Hi,
>
> 2014-04-14 14:22 GMT+09:00 Heiko Schocher <hs@denx.de>:
>> Hello Tetsuyuki
>>
>> Am 14.04.2014 06:45, schrieb Tetsuyuki Kobayashi:
>>
>>> This is regression of commit 2035d77d i2c: sh_i2c: Update to new
>>> CONFIG_SYS_I2C framework
>>>
>>> Before commit 2035d77d, i2c probe command works properly on kzm9g board.
>>>
>>> KZM-A9-GT# i2c probe
>>> Valid chip addresses: 0C 12 1D 32 39 3D 40 60
>>>
>>> After commit 2035d77d, i2c probe command does not work.
>>>
>>> KZM-A9-GT# i2c probe
>>> Valid chip addresses: 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10
>>> 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 20 21 22 23 24 25 26 27 28 29
>>> 2A 2B 2C 2D 2E 2F 30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F 40 41 42
>>> 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F 50 51 52 53 54 55 56 57 58 59 5A 5B
>>> 5C 5D 5E 5F 60 61 62 63 64 65 66 67 68 69 6A 6B 6C 6D 6E 6F 70 71 72 73 74
>>> 75 76 77 78 79 7A 7B 7C 7D 7E 7F
>>>
>>> sh_i2c_probe() calls sh_i2c_read(), but read length is 0. So acutally it
>>> does not read device at all. This patch changes read length to 1.
>>>
>>> Signed-off-by: Tetsuyuki Kobayashi<koba@kmckk.co.jp>
>>> ---
>>>    drivers/i2c/sh_i2c.c |    2 +-
>>>    1 file changed, 1 insertion(+), 1 deletion(-)
>>
>>
>> I could not find your patch in patchwork ... so I think
>> it go through u-boot-sh.git, so:
>>
>> Acked-by: Heiko Schocher <hs@denx.de>
>>
>
> Thanks!
> I think the reason that is not registered in the patchwork, the
> subject is because he is 0/2.
> Tetsuyuki, could you re-send this patch?
>
>> Thanks!
>>
>> bye,
>> Heiko
>> --
>> DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
>> HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
>
> Best regards,
>    Nobuhiro
>