Documentation/devicetree/bindings/mfd/stm32-timers.txt

   1 STM32 Timers driver bindings
   2
   3 This IP provides 3 types of timer along with PWM functionality:
   4 - advanced-control timers consist of a 16-bit auto-reload counter driven by a programmable
   5   prescaler, break input feature, PWM outputs and complementary PWM ouputs channels.
   6 - general-purpose timers consist of a 16-bit or 32-bit auto-reload counter driven by a
   7   programmable prescaler and PWM outputs.
   8 - basic timers consist of a 16-bit auto-reload counter driven by a programmable prescaler.
   9
  10 Required parameters:
  11 - compatible: must be "st,stm32-timers"
  12
  13 - reg:                  Physical base address and length of the controller's
  14                         registers.
  15 - clock-names:          Set to "int".
  16 - clocks:               Phandle to the clock used by the timer module.
  17                         For Clk properties, please refer to ../clock/clock-bindings.txt
  18
  19 Optional parameters:
  20 - resets:               Phandle to the parent reset controller.
  21                         See ../reset/st,stm32-rcc.txt
  22 - dmas:                 List of phandle to dma channels that can be used for
  23                         this timer instance. There may be up to 7 dma channels.
  24 - dma-names:            List of dma names. Must match 'dmas' property. Valid
  25                         names are: "ch1", "ch2", "ch3", "ch4", "up", "trig",
  26                         "com".
  27
  28 Optional subnodes:
  29 - pwm:                  See ../pwm/pwm-stm32.txt
  30 - timer:                See ../iio/timer/stm32-timer-trigger.txt
  31
  32 Example:
  33         timers@40010000 {
  34                 #address-cells = <1>;
  35                 #size-cells = <0>;
  36                 compatible = "st,stm32-timers";
  37                 reg = <0x40010000 0x400>;
  38                 clocks = <&rcc 0 160>;
  39                 clock-names = "int";
  40
  41                 pwm {
  42                         compatible = "st,stm32-pwm";
  43                         pinctrl-0       = <&pwm1_pins>;
  44                         pinctrl-names   = "default";
  45                 };
  46
  47                 timer@0 {
  48                         compatible = "st,stm32-timer-trigger";
  49                         reg = <0>;
  50                 };
  51         };
  52
  53 Example with all dmas:
  54         timer@40010000 {
  55                 ...
  56                 dmas = <&dmamux1 11 0x400 0x0>,
  57                        <&dmamux1 12 0x400 0x0>,
  58                        <&dmamux1 13 0x400 0x0>,
  59                        <&dmamux1 14 0x400 0x0>,
  60                        <&dmamux1 15 0x400 0x0>,
  61                        <&dmamux1 16 0x400 0x0>,
  62                        <&dmamux1 17 0x400 0x0>;
  63                 dma-names = "ch1", "ch2", "ch3", "ch4", "up", "trig", "com";
  64                 ...
  65                 child nodes...
  66         };