diff options
Diffstat (limited to 'Documentation/devicetree/bindings/iio/adc/stmpe-adc.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/iio/adc/stmpe-adc.txt | 19 |
1 files changed, 5 insertions, 14 deletions
diff --git a/Documentation/devicetree/bindings/iio/adc/stmpe-adc.txt b/Documentation/devicetree/bindings/iio/adc/stmpe-adc.txt index b73a1069ed8e..480e66422625 100644 --- a/Documentation/devicetree/bindings/iio/adc/stmpe-adc.txt +++ b/Documentation/devicetree/bindings/iio/adc/stmpe-adc.txt @@ -5,16 +5,10 @@ Required properties: - compatible: "st,stmpe-adc" Optional properties: -Note that the ADC is shared with the STMPE touchscreen, so if using both the -settings should be the same. -If they are not, the last one to be initialized will win. -- st,sample-time: ADC converstion time in number of clock. (0 -> 36 clocks, 1 -> - 44 clocks, 2 -> 56 clocks, 3 -> 64 clocks, 4 -> 80 clocks, 5 -> 96 clocks, 6 - -> 144 clocks), recommended is 4. -- st,mod-12b: ADC Bit mode (0 -> 10bit ADC, 1 -> 12bit ADC) -- st,ref-sel: ADC reference source (0 -> internal reference, 1 -> external - reference) -- st,adc-freq: ADC Clock speed (0 -> 1.625 MHz, 1 -> 3.25 MHz, 2 || 3 -> 6.5 MHz) +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. @@ -23,8 +17,5 @@ Example: stmpe_adc { compatible = "st,stmpe-adc"; - st,sample-time = <4>; - st,mod-12b = <1>; - st,ref-sel = <0>; - st,adc-freq = <1>; + st,norequest-mask = <0x0F>; /* dont use ADC CH3-0 */ }; |