* ST Microelectronics STMPE Multi-Functional Device
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STMPE is an MFD device which may expose the following inbuilt devices: gpio,
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keypad, touchscreen, adc, pwm, rotator.
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Required properties:
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- compatible : "st,stmpe[610|801|811|1600|1601|2401|2403]"
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- reg : I2C/SPI address of the device
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Optional properties:
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- interrupts : The interrupt outputs from the controller
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- interrupt-controller : Marks the device node as an interrupt controller
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- wakeup-source : Marks the input device as wakable
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- st,autosleep-timeout : Valid entries (ms); 4, 16, 32, 64, 128, 256, 512 and 1024
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- irq-gpio : If present, which GPIO to use for event IRQ
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Optional properties for devices with touch and ADC (STMPE811|STMPE610):
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- st,sample-time : ADC conversion time in number of clock.
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0 -> 36 clocks 4 -> 80 clocks (recommended)
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1 -> 44 clocks 5 -> 96 clocks
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2 -> 56 clocks 6 -> 124 clocks
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3 -> 64 clocks
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- st,mod-12b : ADC Bit mode
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0 -> 10bit ADC 1 -> 12bit ADC
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- st,ref-sel : ADC reference source
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0 -> internal 1 -> external
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- st,adc-freq : ADC Clock speed
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0 -> 1.625 MHz 2 || 3 -> 6.5 MHz
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1 -> 3.25 MHz
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Example:
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stmpe1601: stmpe1601@40 {
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compatible = "st,stmpe1601";
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reg = <0x40>;
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interrupts = <26 0x4>;
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interrupt-parent = <&gpio6>;
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interrupt-controller;
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wakeup-source;
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st,autosleep-timeout = <1024>;
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};
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