cs4245_shadow_control
cs4245_shadow_control(chip, CS4245_SAVE_TO_SHADOW);
cs4245_shadow_control(chip, CS4245_LOAD_FROM_SHADOW);
cs4245_shadow_control(chip, CS4245_LOAD_FROM_SHADOW);
int cs4245_shadow_control(struct oxygen *chip, enum cs4245_shadow_operation op);