On Wed, 12 Dec 2018 14:06:47 +0100 Philippe Schenker <[email protected]> wrote:
> From: Stefan Agner <[email protected]> > > This adds the devicetree bindings for the STMPE ADC. And corrects a > typo in st,sample-time it is rather "6 -> 124 clocks" according > to the datasheet and not 144. > > Signed-off-by: Stefan Agner <[email protected]> > Signed-off-by: Max Krummenacher <[email protected]> > Signed-off-by: Philippe Schenker <[email protected]> This still conflates a couple of different things but we can argue about patch separation for ever so never mind. Reviewed-by: Jonathan Cameron <[email protected]> > --- > > Changes in v4: > - Put reformatting in a separate precursor patch. > > Changes in v3: > - Reformatted documentation for touchscreen to use tabs and have a better > overview of the settings. > - Added note which adc-settings will take precedence. > - changed typo in sample-time setting from 144 clocks to 124 clocks, as > stated > in the datasheet. > > Changes in v2: > - Moved the bindings for ADC to the overlying mfd. > - Reformatted for better readability > > .../devicetree/bindings/iio/adc/stmpe-adc.txt | 21 ++++++++++++ > .../bindings/input/touchscreen/stmpe.txt | 32 +++++++++---------- > .../devicetree/bindings/mfd/stmpe.txt | 14 ++++++++ > 3 files changed, 51 insertions(+), 16 deletions(-) > create mode 100644 Documentation/devicetree/bindings/iio/adc/stmpe-adc.txt > > diff --git a/Documentation/devicetree/bindings/iio/adc/stmpe-adc.txt > b/Documentation/devicetree/bindings/iio/adc/stmpe-adc.txt > new file mode 100644 > index 000000000000..480e66422625 > --- /dev/null > +++ b/Documentation/devicetree/bindings/iio/adc/stmpe-adc.txt > @@ -0,0 +1,21 @@ > +STMPE ADC driver > +---------------- > + > +Required properties: > + - compatible: "st,stmpe-adc" > + > +Optional properties: > +Note that the ADC is shared with the STMPE touchscreen. ADC related settings > +have to be done in the mfd. > +- st,norequest-mask: bitmask specifying which ADC channels should _not_ be > + requestable due to different usage (e.g. touch) > + > +Node name must be stmpe_adc and should be child node of stmpe node to > +which it belongs. > + > +Example: > + > + stmpe_adc { > + compatible = "st,stmpe-adc"; > + st,norequest-mask = <0x0F>; /* dont use ADC CH3-0 */ > + }; > diff --git a/Documentation/devicetree/bindings/input/touchscreen/stmpe.txt > b/Documentation/devicetree/bindings/input/touchscreen/stmpe.txt > index 1d3f84308142..8e2b240882fa 100644 > --- a/Documentation/devicetree/bindings/input/touchscreen/stmpe.txt > +++ b/Documentation/devicetree/bindings/input/touchscreen/stmpe.txt > @@ -5,18 +5,6 @@ Required properties: > - compatible: "st,stmpe-ts" > > Optional properties: > -- st,sample-time : ADC conversion time in number of clock. > - 0 -> 36 clocks 4 -> 80 clocks > (recommended) > - 1 -> 44 clocks 5 -> 96 clocks > - 2 -> 56 clocks 6 -> 144 clocks > - 3 -> 64 clocks > -- st,mod-12b : ADC Bit mode > - 0 -> 10bit ADC 1 -> 12bit ADC > -- st,ref-sel : ADC reference source > - 0 -> internal 1 -> external > -- st,adc-freq : ADC Clock speed > - 0 -> 1.625 MHz 2 || 3 -> 6.5 MHz > - 1 -> 3.25 MHz > - st,ave-ctrl : Sample average control > 0 -> 1 sample > 1 -> 2 samples > @@ -40,17 +28,29 @@ Optional properties: > 0 -> 20 mA (typical 35mA max) > 1 -> 50 mA (typical 80 mA max) > > +Optional properties common with MFD (deprecated): > + - st,sample-time : ADC conversion time in number of clock. > + 0 -> 36 clocks 4 -> 80 clocks > (recommended) > + 1 -> 44 clocks 5 -> 96 clocks > + 2 -> 56 clocks 6 -> 124 clocks > + 3 -> 64 clocks > + - st,mod-12b : ADC Bit mode > + 0 -> 10bit ADC 1 -> 12bit ADC > + - st,ref-sel : ADC reference source > + 0 -> internal 1 -> external > + - st,adc-freq : ADC Clock speed > + 0 -> 1.625 MHz 2 || 3 -> 6.5 MHz > + 1 -> 3.25 MHz > + > Node name must be stmpe_touchscreen and should be child node of stmpe node to > which it belongs. > > +Note that common ADC settings of stmpe_touchscreen will take precedence. > + > Example: > > stmpe_touchscreen { > compatible = "st,stmpe-ts"; > - st,sample-time = <4>; > - st,mod-12b = <1>; > - st,ref-sel = <0>; > - st,adc-freq = <1>; > st,ave-ctrl = <1>; > st,touch-det-delay = <2>; > st,settling = <2>; > diff --git a/Documentation/devicetree/bindings/mfd/stmpe.txt > b/Documentation/devicetree/bindings/mfd/stmpe.txt > index a46e7177195d..d4408a417193 100644 > --- a/Documentation/devicetree/bindings/mfd/stmpe.txt > +++ b/Documentation/devicetree/bindings/mfd/stmpe.txt > @@ -14,6 +14,20 @@ Optional properties: > - st,autosleep-timeout : Valid entries (ms); 4, 16, 32, 64, > 128, 256, 512 and 1024 > - irq-gpio : If present, which GPIO to use for event IRQ > > +Optional properties for devices with touch and ADC (STMPE811|STMPE610): > + - st,sample-time : ADC conversion time in number of clock. > + 0 -> 36 clocks 4 -> 80 clocks > (recommended) > + 1 -> 44 clocks 5 -> 96 clocks > + 2 -> 56 clocks 6 -> 124 clocks > + 3 -> 64 clocks > + - st,mod-12b : ADC Bit mode > + 0 -> 10bit ADC 1 -> 12bit ADC > + - st,ref-sel : ADC reference source > + 0 -> internal 1 -> external > + - st,adc-freq : ADC Clock speed > + 0 -> 1.625 MHz 2 || 3 -> 6.5 > MHz > + 1 -> 3.25 MHz > + > Example: > > stmpe1601: stmpe1601@40 {
