| Message ID | 20231222095258.33369-1-eichest@gmail.com |
|---|---|
| Headers | show |
| Series | Add a property to turn off the max touch controller in suspend mode | expand |
On 22/12/2023 10:52, Stefan Eichenberger wrote: > From: Stefan Eichenberger <stefan.eichenberger@toradex.com> > > Add a new property to indicate that the device should power off rather > than use deep sleep. Deep sleep is a feature of the controller that > expects the controller to remain powered in suspend. However, if a > display shares its regulator with the touch controller, we may want to > do a power off so that the display and touch controller do not use any > power. > Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Best regards, Krzysztof
From: Stefan Eichenberger <stefan.eichenberger@toradex.com> Our hardware has a shared regulator that powers various peripherals such as the display, touch, USB hub, etc. Since the Maxtouch controller doesn't currently allow it to be turned off, this regulator has to stay on in suspend mode. This increases the overall power consumption. In order to turn off the controller when the system goes into suspend mode, this series adds a device tree property to the maxtouch driver that allows the controller to be turned off completely and ensurs that it can resume from the power off state. Changes since v1: - Rename the property and change the description (Krzysztof, Linus, Dmitry, Conor) Stefan Eichenberger (2): dt-bindings: input: atmel,maxtouch: add poweroff-sleep property Input: atmel_mxt_ts - support poweroff in suspend .../bindings/input/atmel,maxtouch.yaml | 6 ++ drivers/input/touchscreen/atmel_mxt_ts.c | 72 ++++++++++++++----- 2 files changed, 61 insertions(+), 17 deletions(-)