2  * Texas Instruments' Palmas Power Button Input Driver
4  * Copyright (C) 2012-2014 Texas Instruments Incorporated - http://www.ti.com/
33  * struct palmas_pwron - Palmas power on data
47  * struct palmas_pwron_config - configuration of palmas power on
49  * @pwron_debounce_val:		value for debounce of power button
57  * palmas_power_button_work() - Detects the button release event
58  * @work:	work item to detect button release
65 	struct input_dev *input_dev = pwron->input_dev;  in palmas_power_button_work()
69 	error = palmas_read(pwron->palmas, PALMAS_INTERRUPT_BASE,  in palmas_power_button_work()
72 		dev_err(input_dev->dev.parent,  in palmas_power_button_work()
75 		/* The button is released, report event. */  in palmas_power_button_work()
79 		/* The button is still depressed, keep checking. */  in palmas_power_button_work()
80 		schedule_delayed_work(&pwron->input_work,  in palmas_power_button_work()
86  * pwron_irq() - button press isr
95 	struct input_dev *input_dev = pwron->input_dev;  in pwron_irq()
98 	pm_wakeup_event(input_dev->dev.parent, 0);  in pwron_irq()
101 	mod_delayed_work(system_wq, &pwron->input_work,  in pwron_irq()
108  * palmas_pwron_params_ofinit() - device tree parameter parser
109  * @dev:	palmas button device
124 	config->long_press_time_val = ARRAY_SIZE(lpk_times) - 1;  in palmas_pwron_params_ofinit()
126 	np = dev->of_node;  in palmas_pwron_params_ofinit()
130 	error = of_property_read_u32(np, "ti,palmas-long-press-seconds", &val);  in palmas_pwron_params_ofinit()
134 				config->long_press_time_val = i;  in palmas_pwron_params_ofinit()
141 				     "ti,palmas-pwron-debounce-milli-seconds",  in palmas_pwron_params_ofinit()
146 				config->pwron_debounce_val = i;  in palmas_pwron_params_ofinit()
153 		 lpk_times[config->long_press_time_val]);  in palmas_pwron_params_ofinit()
157  * palmas_pwron_probe() - probe
158  * @pdev:	platform device for the button
164 	struct palmas *palmas = dev_get_drvdata(pdev->dev.parent);  in palmas_pwron_probe()
165 	struct device *dev = &pdev->dev;  in palmas_pwron_probe()
176 		return -ENOMEM;  in palmas_pwron_probe()
180 		dev_err(dev, "Can't allocate power button\n");  in palmas_pwron_probe()
181 		error = -ENOMEM;  in palmas_pwron_probe()
185 	input_dev->name = "palmas_pwron";  in palmas_pwron_probe()
186 	input_dev->phys = "palmas_pwron/input0";  in palmas_pwron_probe()
187 	input_dev->dev.parent = dev;  in palmas_pwron_probe()
207 	pwron->palmas = palmas;  in palmas_pwron_probe()
208 	pwron->input_dev = input_dev;  in palmas_pwron_probe()
210 	INIT_DELAYED_WORK(&pwron->input_work, palmas_power_button_work);  in palmas_pwron_probe()
212 	pwron->irq = platform_get_irq(pdev, 0);  in palmas_pwron_probe()
213 	error = request_threaded_irq(pwron->irq, NULL, pwron_irq,  in palmas_pwron_probe()
225 		dev_err(dev, "Can't register power button: %d\n", error);  in palmas_pwron_probe()
235 	cancel_delayed_work_sync(&pwron->input_work);  in palmas_pwron_probe()
236 	free_irq(pwron->irq, pwron);  in palmas_pwron_probe()
245  * palmas_pwron_remove() - Cleanup on removal
246  * @pdev:	platform device for the button
254 	free_irq(pwron->irq, pwron);  in palmas_pwron_remove()
255 	cancel_delayed_work_sync(&pwron->input_work);  in palmas_pwron_remove()
257 	input_unregister_device(pwron->input_dev);  in palmas_pwron_remove()
264  * palmas_pwron_suspend() - suspend handler
265  * @dev:	power button device
267  * Cancel all pending work items for the power button, setup irq for wakeup
276 	cancel_delayed_work_sync(&pwron->input_work);  in palmas_pwron_suspend()
279 		enable_irq_wake(pwron->irq);  in palmas_pwron_suspend()
285  * palmas_pwron_resume() - resume handler
286  * @dev:	power button device
298 		disable_irq_wake(pwron->irq);  in palmas_pwron_resume()
308 	{ .compatible = "ti,palmas-pwrbutton" },
326 MODULE_ALIAS("platform:palmas-pwrbutton");
327 MODULE_DESCRIPTION("Palmas Power Button");