1 // SPDX-License-Identifier: GPL-2.0-only
3  * Texas Instruments' Palmas Power Button Input Driver
5  * Copyright (C) 2012-2014 Texas Instruments Incorporated - http://www.ti.com/
26  * struct palmas_pwron - Palmas power on data
40  * struct palmas_pwron_config - configuration of palmas power on
42  * @pwron_debounce_val:		value for debounce of power button
50  * palmas_power_button_work() - Detects the button release event
51  * @work:	work item to detect button release
58 	struct input_dev *input_dev = pwron->input_dev;  in palmas_power_button_work()
62 	error = palmas_read(pwron->palmas, PALMAS_INTERRUPT_BASE,  in palmas_power_button_work()
65 		dev_err(input_dev->dev.parent,  in palmas_power_button_work()
68 		/* The button is released, report event. */  in palmas_power_button_work()
72 		/* The button is still depressed, keep checking. */  in palmas_power_button_work()
73 		schedule_delayed_work(&pwron->input_work,  in palmas_power_button_work()
79  * pwron_irq() - button press isr
88 	struct input_dev *input_dev = pwron->input_dev;  in pwron_irq()
91 	pm_wakeup_event(input_dev->dev.parent, 0);  in pwron_irq()
94 	mod_delayed_work(system_wq, &pwron->input_work,  in pwron_irq()
101  * palmas_pwron_params_ofinit() - device tree parameter parser
102  * @dev:	palmas button device
117 	config->long_press_time_val = ARRAY_SIZE(lpk_times) - 1;  in palmas_pwron_params_ofinit()
119 	np = dev->of_node;  in palmas_pwron_params_ofinit()
123 	error = of_property_read_u32(np, "ti,palmas-long-press-seconds", &val);  in palmas_pwron_params_ofinit()
127 				config->long_press_time_val = i;  in palmas_pwron_params_ofinit()
134 				     "ti,palmas-pwron-debounce-milli-seconds",  in palmas_pwron_params_ofinit()
139 				config->pwron_debounce_val = i;  in palmas_pwron_params_ofinit()
146 		 lpk_times[config->long_press_time_val]);  in palmas_pwron_params_ofinit()
150  * palmas_pwron_probe() - probe
151  * @pdev:	platform device for the button
157 	struct palmas *palmas = dev_get_drvdata(pdev->dev.parent);  in palmas_pwron_probe()
158 	struct device *dev = &pdev->dev;  in palmas_pwron_probe()
169 		return -ENOMEM;  in palmas_pwron_probe()
173 		dev_err(dev, "Can't allocate power button\n");  in palmas_pwron_probe()
174 		error = -ENOMEM;  in palmas_pwron_probe()
178 	input_dev->name = "palmas_pwron";  in palmas_pwron_probe()
179 	input_dev->phys = "palmas_pwron/input0";  in palmas_pwron_probe()
180 	input_dev->dev.parent = dev;  in palmas_pwron_probe()
200 	pwron->palmas = palmas;  in palmas_pwron_probe()
201 	pwron->input_dev = input_dev;  in palmas_pwron_probe()
203 	INIT_DELAYED_WORK(&pwron->input_work, palmas_power_button_work);  in palmas_pwron_probe()
205 	pwron->irq = platform_get_irq(pdev, 0);  in palmas_pwron_probe()
206 	if (pwron->irq < 0) {  in palmas_pwron_probe()
207 		error = pwron->irq;  in palmas_pwron_probe()
211 	error = request_threaded_irq(pwron->irq, NULL, pwron_irq,  in palmas_pwron_probe()
223 		dev_err(dev, "Can't register power button: %d\n", error);  in palmas_pwron_probe()
233 	cancel_delayed_work_sync(&pwron->input_work);  in palmas_pwron_probe()
234 	free_irq(pwron->irq, pwron);  in palmas_pwron_probe()
243  * palmas_pwron_remove() - Cleanup on removal
244  * @pdev:	platform device for the button
252 	free_irq(pwron->irq, pwron);  in palmas_pwron_remove()
253 	cancel_delayed_work_sync(&pwron->input_work);  in palmas_pwron_remove()
255 	input_unregister_device(pwron->input_dev);  in palmas_pwron_remove()
260  * palmas_pwron_suspend() - suspend handler
261  * @dev:	power button device
263  * Cancel all pending work items for the power button, setup irq for wakeup
272 	cancel_delayed_work_sync(&pwron->input_work);  in palmas_pwron_suspend()
275 		enable_irq_wake(pwron->irq);  in palmas_pwron_suspend()
281  * palmas_pwron_resume() - resume handler
282  * @dev:	power button device
294 		disable_irq_wake(pwron->irq);  in palmas_pwron_resume()
304 	{ .compatible = "ti,palmas-pwrbutton" },
322 MODULE_ALIAS("platform:palmas-pwrbutton");
323 MODULE_DESCRIPTION("Palmas Power Button");