Atmel TCB PWM controller Required properties: - compatible: should be "atmel,tcb-pwm" - #pwm-cells: should be 3. See pwm.txt in this directory for a description of the cells format. The only third cell flag supported by this binding is PWM_POLARITY_INVERTED. - tc-block: The Timer Counter block to use as a PWM chip. Example: pwm { compatible = "atmel,tcb-pwm"; #pwm-cells = <3>; tc-block = <1>; };