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STRUCT PWM_OPS(9) Pulse-Width Modulation (PWM) STRUCT PWM_OPS(9)

NAME

struct_pwm_ops - PWM controller operations

SYNOPSIS

struct pwm_ops {


  int (* request) (struct pwm_chip *chip, struct pwm_device *pwm);


  void (* free) (struct pwm_chip *chip, struct pwm_device *pwm);


  int (* config) (struct pwm_chip *chip, struct pwm_device *pwm,int duty_ns, int period_ns);


  int (* set_polarity) (struct pwm_chip *chip, struct pwm_device *pwm,enum pwm_polarity polarity);


  int (* capture) (struct pwm_chip *chip, struct pwm_device *pwm,struct pwm_capture *result, unsigned long timeout);


  int (* enable) (struct pwm_chip *chip, struct pwm_device *pwm);


  void (* disable) (struct pwm_chip *chip, struct pwm_device *pwm);


  int (* apply) (struct pwm_chip *chip, struct pwm_device *pwm,struct pwm_state *state);


  void (* get_state) (struct pwm_chip *chip, struct pwm_device *pwm,struct pwm_state *state);
#ifdef CONFIG_DEBUG_FS


  void (* dbg_show) (struct pwm_chip *chip, struct seq_file *s);
#endif


  struct module * owner;
};

MEMBERS

request

optional hook for requesting a PWM

free

optional hook for freeing a PWM

config

configure duty cycles and period length for this PWM

set_polarity

configure the polarity of this PWM

capture

capture and report PWM signal

enable

enable PWM output toggling

disable

disable PWM output toggling

apply

atomically apply a new PWM config. The state argument should be adjusted with the real hardware config (if the approximate the period or duty_cycle value, state should reflect it)

get_state

get the current PWM state. This function is only called once per PWM device when the PWM chip is registered.

dbg_show

optional routine to show contents in debugfs

owner

helps prevent removal of modules exporting active PWMs

COPYRIGHT

January 2017 Kernel Hackers Manual 4.8.