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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leds-spi-byte.txt (1276B)

      1* Single Byte SPI LED Device Driver.
      2
      3The driver can be used for controllers with a very simple SPI protocol:
      4- one LED is controlled by a single byte on MOSI
      5- the value of the byte gives the brightness between two values (lowest to
      6  highest)
      7- no return value is necessary (no MISO signal)
      8
      9The value for lowest and highest brightness is dependent on the device and
     10therefore on the compatible string.
     11
     12Depending on the compatible string some special functions (like hardware
     13accelerated blinking) might can be supported too.
     14
     15The driver currently only supports one LED. The properties of the LED are
     16configured in a sub-node in the device node.
     17
     18Required properties:
     19- compatible: should be one of
     20   * "ubnt,acb-spi-led"		microcontroller (SONiX 8F26E611LA) based device
     21				used for example in Ubiquiti airCube ISP
     22
     23Property rules described in Documentation/devicetree/bindings/spi/spi-bus.txt
     24apply.
     25
     26LED sub-node properties:
     27- label:
     28	see Documentation/devicetree/bindings/leds/common.txt
     29- default-state:
     30	see Documentation/devicetree/bindings/leds/common.txt
     31	Only "on" and "off" are supported.
     32
     33Example:
     34
     35led-controller@0 {
     36	compatible = "ubnt,acb-spi-led";
     37	reg = <0>;
     38	spi-max-frequency = <100000>;
     39
     40	led {
     41		label = "white:status";
     42		default-state = "on";
     43	};
     44};