cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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microchip,qt1050.txt (2311B)


      1Microchip AT42QT1050 Five-channel Touch Sensor IC
      2
      3The AT42QT1050 (QT1050) is a QTouchADC sensor device. The device can sense from
      4one to five keys, dependent on mode. The QT1050 includes all signal processing
      5functions necessary to provide stable sensing under a wide variety of changing
      6conditions, and the outputs are fully debounced.
      7
      8The touchkey device node should be placed inside an I2C bus node.
      9
     10Required properties:
     11- compatible: Must be "microchip,qt1050"
     12- reg: The I2C address of the device
     13- interrupts: The sink for the touchpad's IRQ output,
     14  see ../interrupt-controller/interrupts.txt
     15
     16Optional properties:
     17- wakeup-source: touch keys can be used as a wakeup source
     18
     19Each button (key) is represented as a sub-node:
     20
     21Each not specified key or key with linux,code set to KEY_RESERVED gets disabled
     22in HW.
     23
     24Subnode properties:
     25- linux,code: Keycode to emit.
     26- reg: The key number. Valid values: 0, 1, 2, 3, 4.
     27
     28Optional subnode-properties:
     29
     30If a optional property is missing or has a invalid value the default value is
     31taken.
     32
     33- microchip,pre-charge-time-ns:
     34  Each touchpad need some time to precharge. The value depends on the mechanical
     35  layout.
     36  Valid value range: 0 - 637500; values must be a multiple of 2500;
     37  default is 0.
     38- microchip,average-samples:
     39  Number of data samples which are averaged for each read.
     40  Valid values: 1, 4, 16, 64, 256, 1024, 4096, 16384; default is 1.
     41- microchip,average-scaling:
     42  The scaling factor which is used to scale the average-samples.
     43  Valid values: 1, 2, 4, 8, 16, 32, 64, 128; default is 1.
     44- microchip,threshold:
     45  Number of counts to register a touch detection.
     46  Valid value range: 0 - 255; default is 20.
     47
     48Example:
     49QT1050 with 3 non continuous keys, key2 and key4 are disabled.
     50
     51touchkeys@41 {
     52	compatible = "microchip,qt1050";
     53	reg = <0x41>;
     54	interrupt-parent = <&gpio0>;
     55	interrupts = <17 IRQ_TYPE_EDGE_FALLING>;
     56
     57	up@0 {
     58		reg = <0>;
     59		linux,code = <KEY_UP>;
     60		microchip,average-samples = <64>;
     61		microchip,average-scaling = <16>;
     62		microchip,pre-charge-time-ns = <10000>;
     63	};
     64
     65	right@1 {
     66		reg = <1>;
     67		linux,code = <KEY_RIGHT>;
     68		microchip,average-samples = <64>;
     69		microchip,average-scaling = <8>;
     70	};
     71
     72	down@3 {
     73		reg = <3>;
     74		linux,code = <KEY_DOWN>;
     75		microchip,average-samples = <256>;
     76		microchip,average-scaling = <16>;
     77	};
     78};