31 lines
728 B
Plaintext
31 lines
728 B
Plaintext
|
BCM2835 PWM controller (Raspberry Pi controller)
|
||
|
|
|
||
|
|
Required properties:
|
||
|
|
- compatible: should be "brcm,bcm2835-pwm"
|
||
|
|
- reg: physical base address and length of the controller's registers
|
||
|
|
- clocks: This clock defines the base clock frequency of the PWM hardware
|
||
|
|
system, the period and the duty_cycle of the PWM signal is a multiple of
|
||
|
|
the base period.
|
||
|
|
- #pwm-cells: Should be 3. See pwm.txt in this directory for a description of
|
||
|
|
the cells format.
|
||
|
|
|
||
|
|
Examples:
|
||
|
|
|
||
|
|
pwm@2020c000 {
|
||
|
|
compatible = "brcm,bcm2835-pwm";
|
||
|
|
reg = <0x2020c000 0x28>;
|
||
|
|
clocks = <&clk_pwm>;
|
||
|
|
#pwm-cells = <3>;
|
||
|
|
};
|
||
|
|
|
||
|
|
clocks {
|
||
|
|
....
|
||
|
|
clk_pwm: pwm {
|
||
|
|
compatible = "fixed-clock";
|
||
|
|
reg = <3>;
|
||
|
|
#clock-cells = <0>;
|
||
|
|
clock-frequency = <9200000>;
|
||
|
|
};
|
||
|
|
....
|
||
|
|
};
|