31 static int pwm_beeper_on(struct pwm_beeper *beeper, unsigned long period)  in pwm_beeper_on()  argument
36 	pwm_get_state(beeper->pwm, &state);  in pwm_beeper_on()
42 	error = pwm_apply_might_sleep(beeper->pwm, &state);  in pwm_beeper_on()
46 	if (!beeper->amplifier_on) {  in pwm_beeper_on()
47 		error = regulator_enable(beeper->amplifier);  in pwm_beeper_on()
49 			pwm_disable(beeper->pwm);  in pwm_beeper_on()
53 		beeper->amplifier_on = true;  in pwm_beeper_on()
59 static void pwm_beeper_off(struct pwm_beeper *beeper)  in pwm_beeper_off()  argument
61 	if (beeper->amplifier_on) {  in pwm_beeper_off()
62 		regulator_disable(beeper->amplifier);  in pwm_beeper_off()
63 		beeper->amplifier_on = false;  in pwm_beeper_off()
66 	pwm_disable(beeper->pwm);  in pwm_beeper_off()
71 	struct pwm_beeper *beeper = container_of(work, struct pwm_beeper, work);  in pwm_beeper_work()  local
72 	unsigned long period = READ_ONCE(beeper->period);  in pwm_beeper_work()
75 		pwm_beeper_on(beeper, period);  in pwm_beeper_work()
77 		pwm_beeper_off(beeper);  in pwm_beeper_work()
83 	struct pwm_beeper *beeper = input_get_drvdata(input);  in pwm_beeper_event()  local
90 		value = value ? beeper->bell_frequency : 0;  in pwm_beeper_event()
99 		beeper->period = 0;  in pwm_beeper_event()
101 		beeper->period = HZ_TO_NANOSECONDS(value);  in pwm_beeper_event()
103 	if (!beeper->suspended)  in pwm_beeper_event()
104 		schedule_work(&beeper->work);  in pwm_beeper_event()
109 static void pwm_beeper_stop(struct pwm_beeper *beeper)  in pwm_beeper_stop()  argument
111 	cancel_work_sync(&beeper->work);  in pwm_beeper_stop()
112 	pwm_beeper_off(beeper);  in pwm_beeper_stop()
117 	struct pwm_beeper *beeper = input_get_drvdata(input);  in pwm_beeper_close()  local
119 	pwm_beeper_stop(beeper);  in pwm_beeper_close()
125 	struct pwm_beeper *beeper;  in pwm_beeper_probe()  local
130 	beeper = devm_kzalloc(dev, sizeof(*beeper), GFP_KERNEL);  in pwm_beeper_probe()
131 	if (!beeper)  in pwm_beeper_probe()
134 	beeper->pwm = devm_pwm_get(dev, NULL);  in pwm_beeper_probe()
135 	if (IS_ERR(beeper->pwm))  in pwm_beeper_probe()
136 		return dev_err_probe(dev, PTR_ERR(beeper->pwm), "Failed to request PWM device\n");  in pwm_beeper_probe()
139 	pwm_init_state(beeper->pwm, &state);  in pwm_beeper_probe()
141 	error = pwm_apply_might_sleep(beeper->pwm, &state);  in pwm_beeper_probe()
148 	beeper->amplifier = devm_regulator_get(dev, "amp");  in pwm_beeper_probe()
149 	if (IS_ERR(beeper->amplifier))  in pwm_beeper_probe()
150 		return dev_err_probe(dev, PTR_ERR(beeper->amplifier),  in pwm_beeper_probe()
153 	INIT_WORK(&beeper->work, pwm_beeper_work);  in pwm_beeper_probe()
163 	beeper->bell_frequency = bell_frequency;  in pwm_beeper_probe()
165 	beeper->input = devm_input_allocate_device(dev);  in pwm_beeper_probe()
166 	if (!beeper->input) {  in pwm_beeper_probe()
171 	beeper->input->name = "pwm-beeper";  in pwm_beeper_probe()
172 	beeper->input->phys = "pwm/input0";  in pwm_beeper_probe()
173 	beeper->input->id.bustype = BUS_HOST;  in pwm_beeper_probe()
174 	beeper->input->id.vendor = 0x001f;  in pwm_beeper_probe()
175 	beeper->input->id.product = 0x0001;  in pwm_beeper_probe()
176 	beeper->input->id.version = 0x0100;  in pwm_beeper_probe()
178 	input_set_capability(beeper->input, EV_SND, SND_TONE);  in pwm_beeper_probe()
179 	input_set_capability(beeper->input, EV_SND, SND_BELL);  in pwm_beeper_probe()
181 	beeper->input->event = pwm_beeper_event;  in pwm_beeper_probe()
182 	beeper->input->close = pwm_beeper_close;  in pwm_beeper_probe()
184 	input_set_drvdata(beeper->input, beeper);  in pwm_beeper_probe()
186 	error = input_register_device(beeper->input);  in pwm_beeper_probe()
192 	platform_set_drvdata(pdev, beeper);  in pwm_beeper_probe()
199 	struct pwm_beeper *beeper = dev_get_drvdata(dev);  in pwm_beeper_suspend()  local
206 	spin_lock_irq(&beeper->input->event_lock);  in pwm_beeper_suspend()
207 	beeper->suspended = true;  in pwm_beeper_suspend()
208 	spin_unlock_irq(&beeper->input->event_lock);  in pwm_beeper_suspend()
210 	pwm_beeper_stop(beeper);  in pwm_beeper_suspend()
217 	struct pwm_beeper *beeper = dev_get_drvdata(dev);  in pwm_beeper_resume()  local
219 	spin_lock_irq(&beeper->input->event_lock);  in pwm_beeper_resume()
220 	beeper->suspended = false;  in pwm_beeper_resume()
221 	spin_unlock_irq(&beeper->input->event_lock);  in pwm_beeper_resume()
224 	schedule_work(&beeper->work);  in pwm_beeper_resume()