| Message ID | 1449431542-1892-4-git-send-email-mpa@pengutronix.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Sun, Dec 06, 2015 at 08:52:16PM +0100, Markus Pargmann wrote: > This is the touchscreen conversion queue binding documentation. It uses > the shared imx25 ADC. > > Signed-off-by: Markus Pargmann <mpa@pengutronix.de> > --- > > Notes: > Changes in v9: > - Updated binding descriptions > > Changes in v5: > - Fix signed/unsigned comparison > - Fix unused variable settling_time by putting it in the correct argument list > - Use continous conversion queue with the repeat feature and a proper > repeat-wait. Previously the touchscreen caused massive number of interrupts. > > .../bindings/input/touchscreen/fsl-mx25-tcq.txt | 35 ++++++++++++++++++++++ > 1 file changed, 35 insertions(+) > create mode 100644 Documentation/devicetree/bindings/input/touchscreen/fsl-mx25-tcq.txt > > diff --git a/Documentation/devicetree/bindings/input/touchscreen/fsl-mx25-tcq.txt b/Documentation/devicetree/bindings/input/touchscreen/fsl-mx25-tcq.txt > new file mode 100644 > index 000000000000..d45e50872114 > --- /dev/null > +++ b/Documentation/devicetree/bindings/input/touchscreen/fsl-mx25-tcq.txt > @@ -0,0 +1,35 @@ > +Freescale mx25 TS conversion queue module > + > +mx25 touchscreen conversion queue module which controls the ADC unit of the > +mx25 for attached touchscreens. > + > +Required properties: > + - compatible: Should be "fsl,imx25-tcq". > + - reg: Memory range of the device. > + - interrupts: Should be the interrupt number associated with this module within > + the tscadc unit (<0>). > + - interrupt-parent: Should be a phandle to the tscadc unit. > + - fsl,wires: Should be '<4>' or '<5>' > + > +Optional properties: > + - fsl,pen-debounce: Pen debounce time in nanoseconds. This and ... > + - fsl,pen-threshold: Pen-down threshold for the touchscreen. This is a value > + between 1 and 4096. It is the ratio between the internal reference voltage > + and the measured voltage after the plate was precharged. Resistence between > + plates and therefore the voltage decreases with pressure so that a smaller > + value is equivalent to a higher pressure. > + - fsl,settling-time: Settling time in nanoseconds. The settling time is before > + the actual touch detection to wait for an even charge distribution in the > + plate. ... this still need units (-ns) appended to the property name. > + > +This device includes two conversion queues which can be added as subnodes. > +The first queue is for the touchscreen, the second for general purpose ADC. > + > +Example: > + tsc: tcq@50030400 { > + compatible = "fsl,imx25-tcq"; > + reg = <0x50030400 0x60>; > + interrupt-parent = <&tscadc>; > + interrupts = <0>; > + fsl,wires = <4>; > + }; > -- > 2.6.2 > > -- > To unsubscribe from this list: send the line "unsubscribe devicetree" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi, On Monday 07 December 2015 14:45:46 Rob Herring wrote: > On Sun, Dec 06, 2015 at 08:52:16PM +0100, Markus Pargmann wrote: > > This is the touchscreen conversion queue binding documentation. It uses > > the shared imx25 ADC. > > > > Signed-off-by: Markus Pargmann <mpa@pengutronix.de> > > --- > > > > Notes: > > Changes in v9: > > - Updated binding descriptions > > > > Changes in v5: > > - Fix signed/unsigned comparison > > - Fix unused variable settling_time by putting it in the correct argument list > > - Use continous conversion queue with the repeat feature and a proper > > repeat-wait. Previously the touchscreen caused massive number of interrupts. > > > > .../bindings/input/touchscreen/fsl-mx25-tcq.txt | 35 ++++++++++++++++++++++ > > 1 file changed, 35 insertions(+) > > create mode 100644 Documentation/devicetree/bindings/input/touchscreen/fsl-mx25-tcq.txt > > > > diff --git a/Documentation/devicetree/bindings/input/touchscreen/fsl-mx25-tcq.txt b/Documentation/devicetree/bindings/input/touchscreen/fsl-mx25-tcq.txt > > new file mode 100644 > > index 000000000000..d45e50872114 > > --- /dev/null > > +++ b/Documentation/devicetree/bindings/input/touchscreen/fsl-mx25-tcq.txt > > @@ -0,0 +1,35 @@ > > +Freescale mx25 TS conversion queue module > > + > > +mx25 touchscreen conversion queue module which controls the ADC unit of the > > +mx25 for attached touchscreens. > > + > > +Required properties: > > + - compatible: Should be "fsl,imx25-tcq". > > + - reg: Memory range of the device. > > + - interrupts: Should be the interrupt number associated with this module within > > + the tscadc unit (<0>). > > + - interrupt-parent: Should be a phandle to the tscadc unit. > > + - fsl,wires: Should be '<4>' or '<5>' > > + > > +Optional properties: > > + - fsl,pen-debounce: Pen debounce time in nanoseconds. > > This and ... > > > + - fsl,pen-threshold: Pen-down threshold for the touchscreen. This is a value > > + between 1 and 4096. It is the ratio between the internal reference voltage > > + and the measured voltage after the plate was precharged. Resistence between > > + plates and therefore the voltage decreases with pressure so that a smaller > > + value is equivalent to a higher pressure. > > + - fsl,settling-time: Settling time in nanoseconds. The settling time is before > > + the actual touch detection to wait for an even charge distribution in the > > + plate. > > ... this still need units (-ns) appended to the property name. Thanks. I wasn't aware that the property names itself should include the units. Will fix that. Best Regards, Markus
diff --git a/Documentation/devicetree/bindings/input/touchscreen/fsl-mx25-tcq.txt b/Documentation/devicetree/bindings/input/touchscreen/fsl-mx25-tcq.txt new file mode 100644 index 000000000000..d45e50872114 --- /dev/null +++ b/Documentation/devicetree/bindings/input/touchscreen/fsl-mx25-tcq.txt @@ -0,0 +1,35 @@ +Freescale mx25 TS conversion queue module + +mx25 touchscreen conversion queue module which controls the ADC unit of the +mx25 for attached touchscreens. + +Required properties: + - compatible: Should be "fsl,imx25-tcq". + - reg: Memory range of the device. + - interrupts: Should be the interrupt number associated with this module within + the tscadc unit (<0>). + - interrupt-parent: Should be a phandle to the tscadc unit. + - fsl,wires: Should be '<4>' or '<5>' + +Optional properties: + - fsl,pen-debounce: Pen debounce time in nanoseconds. + - fsl,pen-threshold: Pen-down threshold for the touchscreen. This is a value + between 1 and 4096. It is the ratio between the internal reference voltage + and the measured voltage after the plate was precharged. Resistence between + plates and therefore the voltage decreases with pressure so that a smaller + value is equivalent to a higher pressure. + - fsl,settling-time: Settling time in nanoseconds. The settling time is before + the actual touch detection to wait for an even charge distribution in the + plate. + +This device includes two conversion queues which can be added as subnodes. +The first queue is for the touchscreen, the second for general purpose ADC. + +Example: + tsc: tcq@50030400 { + compatible = "fsl,imx25-tcq"; + reg = <0x50030400 0x60>; + interrupt-parent = <&tscadc>; + interrupts = <0>; + fsl,wires = <4>; + };
This is the touchscreen conversion queue binding documentation. It uses the shared imx25 ADC. Signed-off-by: Markus Pargmann <mpa@pengutronix.de> --- Notes: Changes in v9: - Updated binding descriptions Changes in v5: - Fix signed/unsigned comparison - Fix unused variable settling_time by putting it in the correct argument list - Use continous conversion queue with the repeat feature and a proper repeat-wait. Previously the touchscreen caused massive number of interrupts. .../bindings/input/touchscreen/fsl-mx25-tcq.txt | 35 ++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 Documentation/devicetree/bindings/input/touchscreen/fsl-mx25-tcq.txt