arm64: dts: qcom: msm8916-samsung-a2015: Add touch key

Browse source

The Samsung Galaxy A3/A5 both have two capacitive touch keys,
connected to an ABOV MCU. It implements the same interface as
implemented by the tm2-touchkey driver and works just fine with
the coreriver,tc360-touchkey compatible. It's probably actually some
Samsung-specific interface that they implement with different MCUs.

Note that for some reason Samsung decided to connect this to GPIOs
where no hardware I2C bus is available, so we need to fall back
to software bit-banging using i2c-gpio.

The vdd/vcc-supply is board-specific and will be added separately
for a3u/a5u.

Co-developed-by: Michael Srba <Michael.Srba@seznam.cz>
Signed-off-by: Michael Srba <Michael.Srba@seznam.cz>
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Link: https://lore.kernel.org/r/20210604172742.10593-1-stephan@gerhold.net
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

...

This commit is contained in:

Stephan Gerhold 2021-06-04 19:27:38 +02:00 • committed by Bjorn Andersson

parent eb59cd3e39

commit 61f363a625

1 changed files with 45 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

45

arch/arm64/boot/dts/qcom/msm8916-samsung-a2015-common.dtsi

View file