Implement keyboard backlight control through HID output report. One
could enable CONFIG_USB_HID_KEYBOARD_BACKLIGHT to enable keyboard
backlight support for a given board. Target board must implement the
`void board_set_backlight(int brightness)` function in order correctly
set backlight.
BRANCH=none
BUG=b:37971411,b:63364143
TEST=with follow up CLs
1. `make BOARD=hammer -j`
2. `echo 10 > /sys/class/leds/hammer\:\:kbd_backlight/brightness`
console shows 'Keyboard backlight set to 10%'
Change-Id: Ibeff510a0d996ddebf61b54ed6b500b02c35564a
Signed-off-by: Wei-Ning Huang <wnhuang@google.com>
Reviewed-on: https://chromium-review.googlesource.com/586348
Commit-Ready: Wei-Ning Huang <wnhuang@chromium.org>
Tested-by: Wei-Ning Huang <wnhuang@chromium.org>
Reviewed-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
We use the unofficial, Windows 8, Relative Scan time HID usage
(Digitizer page, 0x56) to add timestamps to our HID touchpad
events.
The timestamps is a rolling, unsigned, 16-bit integer, with a
resolution of 100us (so it wraps around every 6.5s).
The host will be able to synchronize to that timestamp, resetting
an offset every time the touchpad is quiet a certain amount of
time (e.g. 1 second).
BRANCH=none
BUG=b:63685117
TEST=Flash hammer, timestamps are reported in HID descriptor.
Change-Id: Ie5d56a9df14e464d2cdcd559f550d6e3cc81961f
Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/603041
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
id only really needs 4 bits (16 touch events should be more than
enough), so we can steal 2 bits from that field.
We also reorder the fields to make sure that width/x are aligned
on 8-bit boundary.
BRANCH=none
BUG=b:63936194
TEST=Flash hammer, touchpad works, ABS_PRESSURE > 255 is reported
when a palm is pressed on the touchpad.
Change-Id: I1abf1bf53cc9dd998082cea5dc7cd3be17f99ec6
Reviewed-on: https://chromium-review.googlesource.com/583297
Commit-Ready: Nicolas Boichat <drinkcat@chromium.org>
Tested-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-by: Chun-ta Lin <itspeter@chromium.org>
Reviewed-by: KT Liao <kt.liao@emc.com.tw>
This describes a 5-finger touchpad. The physical/logical dimensions
of the trackpad are hardcoded for the time being.
BRANCH=none
BUG=chrome-os-partner:59083
TEST=make BOARD=hammer -j && util/flash_ec --board=hammer
Change-Id: I04a0833a28c013395974104ebdd6fcb29e5d6680
Reviewed-on: https://chromium-review.googlesource.com/407742
Commit-Ready: Nicolas Boichat <drinkcat@chromium.org>
Tested-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
