drivers/pwm/sysfs.c

18 	struct device child;
24 static struct pwm_export *child_to_pwm_export(struct device *child)
26 	return container_of(child, struct pwm_export, child);
29 static struct pwm_device *child_to_pwm_device(struct device *child)
31 	struct pwm_export *export = child_to_pwm_export(child);
36 static ssize_t period_show(struct device *child,
40 	const struct pwm_device *pwm = child_to_pwm_device(child);
48 static ssize_t period_store(struct device *child,
52 	struct pwm_export *export = child_to_pwm_export(child);
71 static ssize_t duty_cycle_show(struct device *child,
75 	const struct pwm_device *pwm = child_to_pwm_device(child);
83 static ssize_t duty_cycle_store(struct device *child,
87 	struct pwm_export *export = child_to_pwm_export(child);
106 static ssize_t enable_show(struct device *child,
110 	const struct pwm_device *pwm = child_to_pwm_device(child);
118 static ssize_t enable_store(struct device *child,
122 	struct pwm_export *export = child_to_pwm_export(child);
154 static ssize_t polarity_show(struct device *child,
158 	const struct pwm_device *pwm = child_to_pwm_device(child);
177 static ssize_t polarity_store(struct device *child,
181 	struct pwm_export *export = child_to_pwm_export(child);
203 static ssize_t capture_show(struct device *child,
207 	struct pwm_device *pwm = child_to_pwm_device(child);
234 static void pwm_export_release(struct device *child)
236 	struct pwm_export *export = child_to_pwm_export(child);
259 	export->child.release = pwm_export_release;
260 	export->child.parent = parent;
261 	export->child.devt = MKDEV(0, 0);
262 	export->child.groups = pwm_groups;
263 	dev_set_name(&export->child, "pwm%u", pwm->hwpwm);
265 	ret = device_register(&export->child);
268 		put_device(&export->child);
280 static int pwm_unexport_match(struct device *child, void *data)
282 	return child_to_pwm_device(child) == data;
287 	struct device *child;
293 	child = device_find_child(parent, pwm, pwm_unexport_match);
294 	if (!child)
303 	put_device(child);
304 	device_unregister(child);
381 	struct device *child;
387 	child = device_find_child(parent, pwm, pwm_unexport_match);
388 	if (!child)
391 	export = child_to_pwm_export(child);
392 	put_device(child);	/* for device_find_child() */