[PATCH 0/2] arm64: dts: qcom: Dell Inspiron 14 Plus 7441 backlight and touchscreen fixes

[Charlie Garner]

Two fixes for the Dell Inspiron 14 Plus 7441.

Patch 1 gives the eDP panel a PWM backlight. The AUO B140QAX01.H panel
only supports PWM-pin brightness, so the DP AUX fallback registers a
backlight with max_brightness 0 and brightness cannot be changed. The PWM
wiring (PMK8550 gpio5 func3, pmk8550_pwm) matches the HP OmniBook X14.
It goes in the Inspiron DT rather than x1-dell-thena.dtsi, because the
Latitude 7455 was submitted with a different panel and a working
backlight, and only the Inspiron has been tested. The dtsi only gains a
panel label, which leaves the Latitude DTB functionally unchanged. If a
Latitude 7455 owner can confirm the same PWM wiring, this can move to the
dtsi.

Patch 2 moves the touchscreen from 0x10, where nothing responds, to 0x09.
That is where the HID-over-I2C device answers, where the firmware's DSDT
places it on this machine, and where the Latitude 7455 DT already has the
same part.

As far as I know, no Inspiron 14 Plus 7441 has its touchscreen at 0x10.
The original node matches the CRD, XPS 13 9345 and T14s nodes the DT was
based on.

Charlie Garner (2):
  arm64: dts: qcom: x1e80100-dell-inspiron-14-plus-7441: add PWM
    backlight
  arm64: dts: qcom: x1e80100-dell-inspiron-14-plus-7441: fix touchscreen
    i2c address

 arch/arm64/boot/dts/qcom/x1-dell-thena.dtsi   |  2 +-
 .../x1e80100-dell-inspiron-14-plus-7441.dts   | 31 +++++++++++++++++--
 2 files changed, 30 insertions(+), 3 deletions(-)


base-commit: 32afff1e816e10185bb571aa9d89dc2eb061d548
-- 
2.55.0