linux/Documentation/devicetree/bindings/pwm/pwm-samsung.txt
<<
>>
Prefs
   1* Samsung PWM timers
   2
   3Samsung SoCs contain PWM timer blocks which can be used for system clock source
   4and clock event timers, as well as to drive SoC outputs with PWM signal. Each
   5PWM timer block provides 5 PWM channels (not all of them can drive physical
   6outputs - see SoC and board manual).
   7
   8Be aware that the clocksource driver supports only uniprocessor systems.
   9
  10Required properties:
  11- compatible : should be one of following:
  12    samsung,s3c2410-pwm - for 16-bit timers present on S3C24xx SoCs
  13    samsung,s3c6400-pwm - for 32-bit timers present on S3C64xx SoCs
  14    samsung,s5p6440-pwm - for 32-bit timers present on S5P64x0 SoCs
  15    samsung,s5pc100-pwm - for 32-bit timers present on S5PC100, S5PV210,
  16                          Exynos4210 rev0 SoCs
  17    samsung,exynos4210-pwm - for 32-bit timers present on Exynos4210,
  18                          Exynos4x12 and Exynos5250 SoCs
  19- reg: base address and size of register area
  20- interrupts: list of timer interrupts (one interrupt per timer, starting at
  21  timer 0)
  22- #pwm-cells: number of cells used for PWM specifier - must be 3
  23   the specifier format is as follows:
  24     - phandle to PWM controller node
  25     - index of PWM channel (from 0 to 4)
  26     - PWM signal period in nanoseconds
  27     - bitmask of optional PWM flags:
  28        0x1 - invert PWM signal
  29
  30Optional properties:
  31- samsung,pwm-outputs: list of PWM channels used as PWM outputs on particular
  32    platform - an array of up to 5 elements being indices of PWM channels
  33    (from 0 to 4), the order does not matter.
  34
  35Example:
  36        pwm@7f006000 {
  37                compatible = "samsung,s3c6400-pwm";
  38                reg = <0x7f006000 0x1000>;
  39                interrupt-parent = <&vic0>;
  40                interrupts = <23>, <24>, <25>, <27>, <28>;
  41                samsung,pwm-outputs = <0>, <1>;
  42                #pwm-cells = <3>;
  43        }
  44