lkml.org 
[lkml]   [2016]   [Feb]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [PATCH v2 14/16] mfd: intel-lpss: Pass SDA hold time to I2C host controller driver
From
On Mon, Feb 8, 2016 at 12:29 PM, Mika Westerberg
<mika.westerberg@linux.intel.com> wrote:
> On Mon, Feb 08, 2016 at 11:09:43AM +0100, Wolfram Sang wrote:
>> On Mon, Nov 30, 2015 at 05:11:42PM +0200, Andy Shevchenko wrote:

>> There has been a request to get this into stable:
>>
>> https://bugzilla.kernel.org/show_bug.cgi?id=108581
>>
>> Since we probably don't want to backport the whole device_property
>> series, is there a simpler fix to backport for stable?
>
> Basically all it needs is to have:
>
> dev->sda_hold_time = 28
>
> in dw_i2c_acpi_configure(). However, we cannot just unconditionally set
> it as it will break existing non-SKL systems so there should be some way
> to check if this is SKL or not. Perhaps we could look for DMI entries of
> the affected machines?
>
> BTW, this is not a regression in a sense as SKL I2C never worked before
> this series.

I could add that "backporting" something which is drastically
different to the original mainstream may probably prevent a smooth
backporting the fixes come later if any. Thus, I would try to port as
much closer as we can to the existing upstream code.

--
With Best Regards,
Andy Shevchenko

\
 
 \ /
  Last update: 2016-02-08 12:01    [W:1.687 / U:0.024 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site