Messages in this thread | | | Subject | Re: [PATCH v10 13/55] dt-bindings: input: atmel: add suspend mode support | From | Dmitry Osipenko <> | Date | Wed, 1 Apr 2020 18:42:33 +0300 |
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31.03.2020 13:50, Jiada Wang пишет: > Add suspend mode support for atmel touchscreen driver > > Signed-off-by: Jiada Wang <jiada_wang@mentor.com> > --- > .../bindings/input/atmel,maxtouch.txt | 9 ++++++++ > MAINTAINERS | 1 + > include/dt-bindings/input/atmel_mxt_ts.h | 23 +++++++++++++++++++ > 3 files changed, 33 insertions(+) > create mode 100644 include/dt-bindings/input/atmel_mxt_ts.h > > diff --git a/Documentation/devicetree/bindings/input/atmel,maxtouch.txt b/Documentation/devicetree/bindings/input/atmel,maxtouch.txt > index c88919480d37..0307e7f7bb43 100644 > --- a/Documentation/devicetree/bindings/input/atmel,maxtouch.txt > +++ b/Documentation/devicetree/bindings/input/atmel,maxtouch.txt > @@ -31,6 +31,15 @@ Optional properties for main touchpad device: > > - reset-gpios: GPIO specifier for the touchscreen's reset pin (active low) > > +- atmel,suspend-mode: Select method used to suspend: > + MXT_SUSPEND_DEEP_SLEEP - use T7 to suspend the device into deep sleep > + MXT_SUSPEND_T9_CTRL - use T9.CTRL to turn off touch processing > + MXT_SUSPEND_REGULATOR - use regulators to power down device during suspend > + Definitions are in <dt-bindings/input/atmel_mxt_ts.h>. > + > +- vdd: Required supply regulator when MXT_SUSPEND_REGULATOR is used to suspend > +- avdd: Required supply regulator when MXT_SUSPEND_REGULATOR is used to suspend
Some of NVIDIA Tegra devices have a VDD regulator in a form of GPIO, which is turned off by default at a boot time, and thus, the power-regulator needs to be enabled by the driver at a probe time in order to power-up the touchscreen.
I think the VDD/AVDD description isn't correct because these are the essential power regulators, they aren't used only for the suspending.
What about something more generic, like this:
- vdd: phandle to Power supply regulator - avdd: phandle to Analog Power supply regulator
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