void (*set_capture_format) (cs4231_t *chip, snd_pcm_hw_params_t *hw_params, unsigned char cdfr);
void (*trigger) (cs4231_t *chip, unsigned int what, int start);
#ifdef CONFIG_PM
- struct pm_dev *pm_dev;
void (*suspend) (cs4231_t *chip);
void (*resume) (cs4231_t *chip);
#endif