linux-kernel - Re: [Patch V3 0/5] I2C ACPI operation region handler

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Message-ID: <10091506.iBigojlNVE@vostro.rjw.lan>
Date:	Fri, 30 May 2014 14:24:12 +0200
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	Lan Tianyu <tianyu.lan@...el.com>
Cc:	wsa@...-dreams.de, mika.westerberg@...ux.intel.com,
	awilliam@...hat.com, lenb@...nel.org, linux-i2c@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org
Subject: Re: [Patch V3 0/5] I2C ACPI operation region handler

On Friday, May 30, 2014 02:00:39 PM Lan Tianyu wrote:
> On 05/20/2014 08:59 PM, Lan Tianyu wrote:
> > ACPI 5.0 spec(5.5.2.4.5) defines GenericSerialBus(i2c, spi, uart) operation
> > region. It allows ACPI aml code able to access such kind of devices to
> > implement some ACPI standard method.
> >
> > On the Asus T100TA, Bios use GenericSerialBus operation region to access
> > i2c device to get battery info. So battery function depends on the I2C
> > operation region support. Here is the bug link.
> > https://bugzilla.kernel.org/show_bug.cgi?id=69011
> >
> 
> Hi Wolfram:
> 	Since this version resolved all comments, it's ok for you?

BTW, patches [2-3/5] are already queued up for 3.16 as they are independent of
the i2c changes.

> 
> > Change since V2:
> >          Drop patchs of adding I2C smbus quick read/write and word/block
> > process call functions because not find machines supporting such protocols
> > so far and can't test these functions.
> >          Merge patchs of "I2C ACPI related code clear up" and "Add CONFIG_I2C_ACPI
> > config"
> > 	Patch 2: Add acpi_bus_detach_private_data() function to detach data from
> > ACPI handle and replace ACPI_ERROR() with acpi_handle_debug() to avoid some redundant
> > error log.
> >
> > Change since V1:
> >         Fix some code style issues. Change prefix i2c_acpi to acpi_i2c.
> > Move ACPI related code in the i2c core to i2c-acpi.c. Add CONFIG_I2C_ACPI
> > and make i2c core built-in when it's set to avoid i2c ACPI operation region
> > being removed.
> >
> > Lan Tianyu (5):
> >    ACPICA: Export acpi_buffer_to_resource symbol
> >    ACPI: Add acpi_bus_attach_private_data() to facilitate to attach data
> >      to ACPI handle
> >    ACPI/Thermal: Use acpi_bus_attach_private_data() to attach private
> >      data
> >    I2C/ACPI: Add i2c ACPI operation region support
> >    I2C/ACPI: Clean up I2C ACPI code and Add CONFIG_I2C_ACPI config
> >
> >   drivers/acpi/acpica/rscreate.c |   1 +
> >   drivers/acpi/bus.c             |  28 +++-
> >   drivers/acpi/thermal.c         |  11 +-
> >   drivers/i2c/Kconfig            |  18 +-
> >   drivers/i2c/Makefile           |   5 +-
> >   drivers/i2c/i2c-acpi.c         | 362 +++++++++++++++++++++++++++++++++++++++++
> >   drivers/i2c/i2c-core.c         |  97 +----------
> >   include/acpi/acpi_bus.h        |   2 +
> >   include/linux/acpi.h           |  11 ++
> >   include/linux/i2c.h            |  12 ++
> >   10 files changed, 439 insertions(+), 108 deletions(-)
> >   create mode 100644 drivers/i2c/i2c-acpi.c
> >
> 
> --
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-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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