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* ST Microelectronics STMPE Multi-Functional Device
STMPE is an MFD device which may expose the following inbuilt devices: gpio,
keypad, touchscreen, adc, pwm, rotator.
Required properties:
- compatible : "st,stmpe[610|801|811|1600|1601|2401|2403]"
- reg : I2C/SPI address of the device
Optional properties:
- interrupts : The interrupt outputs from the controller
- interrupt-controller : Marks the device node as an interrupt controller
- wakeup-source : Marks the input device as wakable
- 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 {
compatible = "st,stmpe1601";
reg = <0x40>;
interrupts = <26 0x4>;
interrupt-parent = <&gpio6>;
interrupt-controller;
wakeup-source;
st,autosleep-timeout = <1024>;
};
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