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?
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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