| Message ID | 20210302101556.7150-1-digetx@gmail.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | Support wakeup methods of Atmel maXTouch controllers | expand |
02.03.2021 13:15, Dmitry Osipenko пишет: > Some Atmel touchscreen controllers have a WAKE line that needs to be > asserted low in order to wake up controller from a deep sleep. Document > the wakeup methods and the new GPIO properties. > > Reviewed-by: Linus Walleij <linus.walleij@linaro.org> > Signed-off-by: Dmitry Osipenko <digetx@gmail.com> I'll send a v6 shortly because accidentally missed to add r-b from Rob Herring to this patch that he gave to v4.
Some Atmel maXTouch controllers, like mXT1386 and mXT3432S1 for example, have a WAKE line that needs to be asserted in order to wake controller from a deep sleep, otherwise it will be unusable. This series implements support for the wakeup methods in accordance to the mXT1386 datasheet [1], see page 29 (chapter "5.8 WAKE Line"). The mXT1386 is a widely used controller found on many older Android tablet devices. Touchscreen on Acer A500 tablet now works properly after this series. This patchset is a continuation of the work originally started by Jiada Wang [2]. [1] https://ww1.microchip.com/downloads/en/DeviceDoc/mXT1386_1vx_Datasheet_LX.pdf [2] https://patchwork.kernel.org/project/linux-input/list/?series=357875 Changelog: v5: - No code changes. Improved commit message of the "acer-a500: Add atmel,wakeup-method property" patch and added r-b from Linus Walleij to "Input: atmel_mxt_ts - support wakeup methods" patch that he gave to v4. v4: - Improved commit message of the DT binding patch. No code changes. v3: - Added "default: 0" to the atmel,wakeup-method property in the binding. - Added r-b from Linus Walleij to the binding patch. - The wake-GPIO is now toggled on touchscreen's start/stop in order to allow it to sleep during suspend. Suggested by Linus Walleij. v2: - Fixed copy-paste bug in the code. Dmitry Osipenko (3): dt-bindings: input: atmel_mxt_ts: Document atmel,wakeup-method and WAKE line GPIO Input: atmel_mxt_ts - support wakeup methods ARM: tegra: acer-a500: Add atmel,wakeup-method property .../bindings/input/atmel,maxtouch.yaml | 29 +++++++ .../boot/dts/tegra20-acer-a500-picasso.dts | 3 + drivers/input/touchscreen/atmel_mxt_ts.c | 78 +++++++++++++++++++ include/dt-bindings/input/atmel-maxtouch.h | 10 +++ 4 files changed, 120 insertions(+) create mode 100644 include/dt-bindings/input/atmel-maxtouch.h