Randall Spangler 2da2e72dd3 Add support for ACPI read/write commands ...

This is needed to support the kernel keyboard backlight driver through ACPI.

Also adds a few other memory addresses for testing this interface -
version, test, and test-compliment.

BUG=chrome-os-partner:12001
TEST=manual

    - query next ACPI event
    io_write8 0x66 0x84
    io_read8 0x62
    0x00
    - read ACPI memmap version
    io_write8 0x66 0x80
    io_write8 0x62 0
    io_read8 0x62
    0x01
    - extra command writes shouldn't crash
    io_write8 0x66 0x80
    io_write8 0x66 0x80
    io_write8 0x62 1
    - extra data writes shouldn't crash either
    io_write8 0x62 1
    io_write8 0x62 1
    - write test address
    io_write8 0x66 0x81
    io_write8 0x62 1
    io_write8 0x62 0x2a
    - read it back
    io_write8 0x66 0x80
    io_write8 0x62 1
    io_read8 0x62
    0x2a
    - read back test compliment
    io_write8 0x66 0x80
    io_write8 0x62 2
    io_read8 0x62
    0xd5
    - set keyboard backlight to 50%
    io_write8 0x66 0x81
    io_write8 0x62 3
    io_write8 0x62 50
    - read it back
    io_write8 0x66 0x80
    io_write8 0x62 3
    io_read8 0x62
    0x32

Change-Id: I619fdbd322cdef8ffffbb882b3bbb587e364334d
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/28714
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>

2012-07-30 15:22:41 -07:00

..

lm4

Add support for ACPI read/write commands

2012-07-30 15:22:41 -07:00

stm32

Remove "Sticky" recovery mode on Daisy

2012-07-30 14:33:51 -07:00