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

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Date:	Fri, 30 Oct 2015 18:54:50 +0000
From:	Lee Jones <lee.jones@...aro.org>
To:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:	linux-acpi@...r.kernel.org, linux-i2c@...r.kernel.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, 21 Oct 2015, Andy Shevchenko wrote:

> 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.

So we're just waiting for Thierry's Ack now, right?

> > 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(-)
> > 
> 

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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