3  * A simple sysfs interface for the generic PWM framework
15 #include <linux/pwm.h>
19 	struct pwm_device *pwm;  member
33 	return export->pwm;  in child_to_pwm_device()
40 	const struct pwm_device *pwm = child_to_pwm_device(child);  in period_show()  local
43 	pwm_get_state(pwm, &state);  in period_show()
53 	struct pwm_device *pwm = export->pwm;  in period_store()  local
63 	pwm_get_state(pwm, &state);  in period_store()
65 	ret = pwm_apply_state(pwm, &state);  in period_store()
75 	const struct pwm_device *pwm = child_to_pwm_device(child);  in duty_cycle_show()  local
78 	pwm_get_state(pwm, &state);  in duty_cycle_show()
88 	struct pwm_device *pwm = export->pwm;  in duty_cycle_store()  local
98 	pwm_get_state(pwm, &state);  in duty_cycle_store()
100 	ret = pwm_apply_state(pwm, &state);  in duty_cycle_store()
111 	const struct pwm_device *pwm = child_to_pwm_device(child);  in oneshot_count_show()  local
114 	pwm_get_state(pwm, &state);  in oneshot_count_show()
124 	struct pwm_device *pwm = export->pwm;  in oneshot_count_store()  local
134 	pwm_get_state(pwm, &state);  in oneshot_count_store()
136 	ret = pwm_apply_state(pwm, &state);  in oneshot_count_store()
147 	const struct pwm_device *pwm = child_to_pwm_device(child);  in enable_show()  local
150 	pwm_get_state(pwm, &state);  in enable_show()
160 	struct pwm_device *pwm = export->pwm;  in enable_store()  local
170 	pwm_get_state(pwm, &state);  in enable_store()
184 	ret = pwm_apply_state(pwm, &state);  in enable_store()
195 	const struct pwm_device *pwm = child_to_pwm_device(child);  in polarity_show()  local
199 	pwm_get_state(pwm, &state);  in polarity_show()
219 	struct pwm_device *pwm = export->pwm;  in polarity_store()  local
232 	pwm_get_state(pwm, &state);  in polarity_store()
234 	ret = pwm_apply_state(pwm, &state);  in polarity_store()
244 	struct pwm_device *pwm = child_to_pwm_device(child);  in capture_show()  local
248 	ret = pwm_capture(pwm, &result, jiffies_to_msecs(HZ));  in capture_show()
259 	const struct pwm_device *pwm = child_to_pwm_device(child);  in output_type_show()  local
263 	pwm_get_state(pwm, &state);  in output_type_show()
300 ATTRIBUTE_GROUPS(pwm);
309 static int pwm_export_child(struct device *parent, struct pwm_device *pwm)  in pwm_export_child()  argument
315 	if (test_and_set_bit(PWMF_EXPORTED, &pwm->flags))  in pwm_export_child()
320 		clear_bit(PWMF_EXPORTED, &pwm->flags);  in pwm_export_child()
324 	export->pwm = pwm;  in pwm_export_child()
331 	dev_set_name(&export->child, "pwm%u", pwm->hwpwm);  in pwm_export_child()
335 		clear_bit(PWMF_EXPORTED, &pwm->flags);  in pwm_export_child()
340 	pwm_prop[0] = kasprintf(GFP_KERNEL, "EXPORT=pwm%u", pwm->hwpwm);  in pwm_export_child()
353 static int pwm_unexport_child(struct device *parent, struct pwm_device *pwm)  in pwm_unexport_child()  argument
358 	if (!test_and_clear_bit(PWMF_EXPORTED, &pwm->flags))  in pwm_unexport_child()
361 	child = device_find_child(parent, pwm, pwm_unexport_match);  in pwm_unexport_child()
365 	pwm_prop[0] = kasprintf(GFP_KERNEL, "UNEXPORT=pwm%u", pwm->hwpwm);  in pwm_unexport_child()
373 	pwm_put(pwm);  in pwm_unexport_child()
383 	struct pwm_device *pwm;  in export_store()  local
394 	pwm = pwm_request_from_chip(chip, hwpwm, "sysfs");  in export_store()
395 	if (IS_ERR(pwm))  in export_store()
396 		return PTR_ERR(pwm);  in export_store()
398 	ret = pwm_export_child(parent, pwm);  in export_store()
400 		pwm_put(pwm);  in export_store()
446 					      struct pwm_device *pwm,  in pwm_class_get_state()  argument
452 	if (!test_bit(PWMF_EXPORTED, &pwm->flags))  in pwm_class_get_state()
455 	child = device_find_child(parent, pwm, pwm_unexport_match);  in pwm_class_get_state()
463 	pwm_get_state(pwm, state);  in pwm_class_get_state()
469 				 struct pwm_device *pwm,  in pwm_class_apply_state()  argument
472 	int ret = pwm_apply_state(pwm, state);  in pwm_class_apply_state()
487 		struct pwm_device *pwm = &chip->pwms[i];  in pwm_class_resume_npwm()  local
491 		export = pwm_class_get_state(parent, pwm, &state);  in pwm_class_resume_npwm()
496 		ret = pwm_class_apply_state(export, pwm, &state);  in pwm_class_resume_npwm()
511 		struct pwm_device *pwm = &chip->pwms[i];  in pwm_class_suspend()  local
515 		export = pwm_class_get_state(parent, pwm, &state);  in pwm_class_suspend()
521 		ret = pwm_class_apply_state(export, pwm, &state);  in pwm_class_suspend()
524 			 * roll back the PWM devices that were disabled by  in pwm_class_suspend()
545 	.name = "pwm",
583 		struct pwm_device *pwm = &chip->pwms[i];  in pwmchip_sysfs_unexport()  local
585 		if (test_bit(PWMF_EXPORTED, &pwm->flags))  in pwmchip_sysfs_unexport()
586 			pwm_unexport_child(parent, pwm);  in pwmchip_sysfs_unexport()