[PATCH v6] input: touchscreen: Add generic driver for Silead touchscreens

[Dmitry Torokhov]

On Sat, Jul 16, 2016 at 12:56:05PM -0500, Rob Herring wrote:
> On Mon, Jul 11, 2016 at 05:51:44PM +0200, Hans de Goede wrote:
> > From: Robert Dolca <robert.dolca at intel.com>
> > 
> > This driver adds support for Silead touchscreens. It has been tested
> > with GSL1680 and GSL3680 touch panels.
> > 
> > It supports ACPI and device tree enumeration. Screen resolution,
> > the maximum number of fingers supported and firmware name are
> > configurable.
> > 
> > Signed-off-by: Robert Dolca <robert.dolca at intel.com>
> > Signed-off-by: Daniel Jansen <djaniboe at gmail.com>
> > Signed-off-by: Hans de Goede <hdegoede at redhat.com>
> > ---
> > Changes in v6:
> > -Default to 5 fingers if max-fingers is not specified
> > -Improve devicetree binding doc: improve wake-gpios description, use
> >  "See touchscreen.txt" where applicable
> > ---
> >  .../bindings/input/touchscreen/silead_gsl1680.txt  |  36 ++
> >  drivers/input/touchscreen/Kconfig                  |  13 +
> >  drivers/input/touchscreen/Makefile                 |   1 +
> >  drivers/input/touchscreen/silead.c                 | 652 +++++++++++++++++++++
> >  4 files changed, 702 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/input/touchscreen/silead_gsl1680.txt
> >  create mode 100644 drivers/input/touchscreen/silead.c
> > 
> > diff --git a/Documentation/devicetree/bindings/input/touchscreen/silead_gsl1680.txt b/Documentation/devicetree/bindings/input/touchscreen/silead_gsl1680.txt
> > new file mode 100644
> > index 0000000..1e58d37
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/input/touchscreen/silead_gsl1680.txt
> > @@ -0,0 +1,36 @@
> > +* GSL 1680 touchscreen controller
> > +
> > +Required properties:
> > +- compatible		  : "silead,gsl1680"
> > +- reg			  : I2C slave address of the chip (0x40)
> > +- interrupt-parent	  : a phandle pointing to the interrupt controller
> > +			    serving the interrupt for this chip
> > +- interrupts		  : interrupt specification for the gsl1680 interrupt
> > +- power-gpios		  : Specification for the pin connected to the gsl1680's
> > +			    shutdown input. This needs to be driven high to take the
> > +			    gsl1680 out of its low power state
> > +- touchscreen-size-x	  : See touchscreen.txt
> > +- touchscreen-size-y	  : See touchscreen.txt
> > +- touchscreen-max-fingers : maximum number of fingers the touchscreen can detect
> 
> If you name it like a standard property, then it should be documented in 
> touchscreen.txt.

Actually this is very much Silead-specific wart, I'd rather we called it
"max-fingers" or "silead,max-fingers" to illustrate that it is not at
all a generic property.

Rob, will you be OK with it?

Thanks.

-- 
Dmitry