On 04/16/2014 09:24 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

Completely fixing battery issue on the Asus T100TA also needs ACPI _DEP
support. The feature is under developing. Attach a temporary patch
for test.

>
> This patchset is to add I2C ACPI operation region handler support.
>
> [PATCH 1/9] ACPICA: Executer: Fix buffer allocation issue for
> [PATCH 2/9] ACPICA: Export acpi_buffer_to_resource symbol
> [PATCH 3/9] ACPI: Add acpi_bus_attach_private_data() to facilitate to
> [PATCH 4/9] ACPI/Thermal: Use acpi_bus_attach_private_data() to
> [PATCH 5/9] I2C: Add smbus quick read/write helper function
> [PATCH 6/9] I2C: Add smbus word/block process call helper function
> [PATCH 7/9] I2C/ACPI: Add i2c ACPI operation region support
> [PATCH 8/9] I2C/ACPI: Move ACPI related code to i2c-acpi.c
> [PATCH 9/9] I2C/ACPI: Add CONFIG_I2C_ACPI config
>