Documentation/devicetree/bindings/arm/samsung/exynos-adc.txt

   1 Samsung Exynos Analog to Digital Converter bindings
   2
   3 The devicetree bindings are for the new ADC driver written for
   4 Exynos4 and upward SoCs from Samsung.
   5
   6 New driver handles the following
   7 1. Supports ADC IF found on EXYNOS4412/EXYNOS5250
   8    and future SoCs from Samsung
   9 2. Add ADC driver under iio/adc framework
  10 3. Also adds the Documentation for device tree bindings
  11
  12 Required properties:
  13 - compatible:           Must be "samsung,exynos-adc-v1"
  14                                 for exynos4412/5250 controllers.
  15                         Must be "samsung,exynos-adc-v2" for
  16                                 future controllers.
  17 - reg:                  Contains ADC register address range (base address and
  18                         length) and the address of the phy enable register.
  19 - interrupts:           Contains the interrupt information for the timer. The
  20                         format is being dependent on which interrupt controller
  21                         the Samsung device uses.
  22 - #io-channel-cells = <1>; As ADC has multiple outputs
  23 - clocks                From common clock binding: handle to adc clock.
  24 - clock-names           From common clock binding: Shall be "adc".
  25 - vdd-supply            VDD input supply.
  26
  27 Note: child nodes can be added for auto probing from device tree.
  28
  29 Example: adding device info in dtsi file
  30
  31 adc: adc@12D10000 {
  32         compatible = "samsung,exynos-adc-v1";
  33         reg = <0x12D10000 0x100>, <0x10040718 0x4>;
  34         interrupts = <0 106 0>;
  35         #io-channel-cells = <1>;
  36         io-channel-ranges;
  37
  38         clocks = <&clock 303>;
  39         clock-names = "adc";
  40
  41         vdd-supply = <&buck5_reg>;
  42 };
  43
  44
  45 Example: Adding child nodes in dts file
  46
  47 adc@12D10000 {
  48
  49         /* NTC thermistor is a hwmon device */
  50         ncp15wb473@0 {
  51                 compatible = "murata,ncp15wb473";
  52                 pullup-uv = <1800000>;
  53                 pullup-ohm = <47000>;
  54                 pulldown-ohm = <0>;
  55                 io-channels = <&adc 4>;
  56         };
  57 };
  58
  59 Note: Does not apply to ADC driver under arch/arm/plat-samsung/
  60 Note: The child node can be added under the adc node or separately.