linux-kernel - Re: [PATCH v2 00/16] intel-lpss: support non-ACPI platforms

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Date:	Tue, 5 Jan 2016 09:57:35 -0800
From:	Laura Abbott <labbott@...hat.com>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jarkko Nikula <jarkko.nikula@...ux.intel.com>,
	linux-i2c@...r.kernel.org, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org, Lee Jones <lee.jones@...aro.org>,
	Mika Westerberg <mika.westerberg@...ux.intel.com>,
	Kevin Fenzi <kevin@...ye.com>, Arnd Bergmann <arnd@...db.de>,
	Wolfram Sang <wsa@...-dreams.de>
Subject: Re: [PATCH v2 00/16] intel-lpss: support non-ACPI platforms

On 12/06/2015 05:44 PM, Rafael J. Wysocki wrote:
> On Monday, November 30, 2015 05:11:28 PM Andy Shevchenko wrote:
>> This series includes few logical sets that bring a support of non-ACPI
>> platforms for Intel Skylake.
>>
>> First part is a refactoring of built-in device properties support:
>> - keep single value inside the structure
>> - provide helper macros to define built-in properties
>> - fall back to secondary fwnode if primary has no asked property
>>
>> Second is a propagating built-in device properties in platform core.
>>
>> Third one is modifications to MFD code and intel-lpss.c driver in particular
>> to define and pass built-in properties to the individual drivers.
>>
>> And last part is a fix for I2C bug found on Lenovo Yoga hardware and a first
>> converted user.
>>
>> Built-in device properties is an alternative to platform data. It provides a
>> unified API that drivers can use to cover all cases at once: DT, ACPI, and
>> built-in properties.
>>
>> With this series applied a platform data can be considered obsolete. Moreover,
>> built-in device properties allow to adjust the existing configuration, for
>> example, in cases when ACPI values are wrong on some platforms.
>>
>> The series has been tested on available hardware and doesn't break current
>> behaviour. But we ask people who have the affected hardware to apply the series
>> on your side and check with Lenovo hardware.
>>
>> Changelog v2:
>> - fix isuues found by kbuild bot (kbuild)
>> - append a patch to propagate device properties in polatform code (Arnd)
>> - update few existing and add couple of new patches due to above
>> - check with kmemleak
>>
>> Andy Shevchenko (9):
>>    device property: always check for fwnode type
>>    device property: rename helper functions
>>    device property: refactor built-in properties support
>>    device property: keep single value inplace
>>    device property: improve readability of macros
>>    device property: return -EINVAL when property isn't found in ACPI
>>    device property: Fallback to secondary fwnode if primary misses the
>>      property
>>    mfd: core: propagate device properties to sub devices drivers
>>    mfd: intel-lpss: Pass HSUART configuration via properties
>>
>> Heikki Krogerus (1):
>>    device property: helper macros for property entry creation
>>
>> Mika Westerberg (6):
>>    device property: Take a copy of the property set
>>    driver core: platform: Add support for built-in device properties
>>    driver core: Do not overwrite secondary fwnode with NULL if it is set
>>    mfd: intel-lpss: Add support for passing device properties
>>    mfd: intel-lpss: Pass SDA hold time to I2C host controller driver
>>    i2c: designware: Convert to use unified device property API
>
> I'm going to queue up this series for v4.5.
>
> If there are any problems with it or objections from anyone, please let me know.
>


Raising an old thread, I pulled this series into Fedora rawhide and
while it worked for Lenovo Yoga we received a report that it caused
a regression on the Dell Inspiron 7559 (see
https://bugzilla.redhat.com/show_bug.cgi?id=1275718#c27) . I haven't
asked the reporter about bisecting to see which patch broke it.
Were there any known follow up patches?

Thanks,
Laura


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