linux-kernel - Re: [PATCH v3 0/6] enable I2C devices behind I2C bus on Gen2

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Date:	Wed, 21 Oct 2015 18:05:54 +0300
From:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:	linux-acpi@...r.kernel.org, linux-i2c@...r.kernel.org,
	Lee Jones <lee.jones@...aro.org>,
	Wolfram Sang <wsa@...-dreams.de>,
	"Rafael J . Wysocki" <rjw@...ysocki.net>,
	Mika Westerberg <mika.westerberg@...el.com>,
	"Puustinen, Ismo" <ismo.puustinen@...el.com>,
	"Pandruvada, Srinivas" <srinivas.pandruvada@...el.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 0/6] enable I2C devices behind I2C bus on Gen2

On Wed, 2015-10-07 at 13:18 +0300, Andy Shevchenko wrote:
> There is a board in the wild, i.e. Intel Galileo Gen2, that has ACPI
> enumerated
> devices behind I2C bus.

Lee, since Wolfram is going to apply patches 1 and 5, how could we
proceed with the rest? Patches are indeed build independent, though
they are unified by enabling logically piece-by-piece. It would be
great if you think you may apply them to your v4.4 queue.


> This patch series dedicated to enable those devices. Meanwhile it
> also changes
> I2C core to cope with ACPI 6.0 specification (patch 1).
> 
> The MFD framework is also updated to cope with interesting
> implementation of
> the cell descriptions under ACPI MFD (patch 2).
> 
> The patches 5 and 6 are pretty independent and could be applied
> ahead, though
> they don't make much sense without previous ones.
> 
> Srinivas, it would be nice to see your tag (ideally Tested-by) to be
> sure we
> don't break ISH stuff.
> 
> Since it touches multiple subsystems someone needs to create an
> immutable
> branch. I don't actually know whose subsystem better here. Wolfram?
> 
> Tested on the actual Intel Galileo Gen2 by Ismo (gpio expanders) and
> me (at24).
> 
> Changelog v3:
> - append ACKs from Rafael (from ACPI angle)
> - drop upstreamed patches (GPIO pca953x)
> 
> Changelog v2:
> - append tags
> - re-make patch 3 (suggested by Lee)
> - improve patch 8 (suggested by Thierry)
> 
> Andy Shevchenko (5):
>   mfd: core: redo ACPI matching of the children devices
>   mfd: intel_quark_i2c_gpio: load gpio driver first
>   mfd: intel_quark_i2c_gpio: support devices behind i2c bus
>   at24: enable ACPI device found on Galileo Gen2
>   pwm-pca9685: enable ACPI device found on Galileo Gen2
> 
> Mika Westerberg (1):
>   i2c / ACPI: Rework I2C device scanning
> 
>  Documentation/acpi/enumeration.txt | 11 +++--
>  drivers/i2c/i2c-core.c             | 82 +++++++++++++++++++++++++++-
> ----------
>  drivers/mfd/intel_quark_i2c_gpio.c | 33 ++++++++++-----
>  drivers/mfd/mfd-core.c             | 52 ++++++++++++++++--------
>  drivers/misc/eeprom/at24.c         | 22 ++++++++--
>  drivers/pwm/Kconfig                |  2 +-
>  drivers/pwm/pwm-pca9685.c          | 20 ++++++++--
>  include/linux/mfd/core.h           | 10 ++++-
>  8 files changed, 170 insertions(+), 62 deletions(-)
> 

-- 
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Intel Finland Oy

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