// SPDX-License-Identifier: GPL-2.0-only/* * CPCAP Power Button Input Driver * * Copyright (C) 2017 Sebastian Reichel <sre@kernel.org> */ #include <linux/module.h>#include <linux/init.h>#include <linux/kernel.h>#include <linux/errno.h>#include <linux/input.h>#include <linux/interrupt.h>#include <linux/regmap.h>#include <linux/of.h>#include <linux/platform_device.h>#include <linux/mfd/motorola-cpcap.h> #define CPCAP_IRQ_ON 23#define CPCAP_IRQ_ON_BITMASK (1 << (CPCAP_IRQ_ON % 16)) struct cpcap_power_button {	struct regmap *regmap;	struct input_dev *idev;	struct device *dev;}; static irqreturn_t powerbutton_irq(int irq, void *_button){	struct cpcap_power_button *button = _button;	int val; 	val = cpcap_sense_virq(button->regmap, irq);	if (val < 0) {		dev_err(button->dev, "irq read failed: %d", val);		return IRQ_HANDLED;	} 	pm_wakeup_event(button->dev, 0);	input_report_key(button->idev, KEY_POWER, val);	input_sync(button->idev); 	return IRQ_HANDLED;} static int cpcap_power_button_probe(struct platform_device *pdev){	struct cpcap_power_button *button;	int irq;	int err; 	irq = platform_get_irq(pdev, 0);	if (irq < 0)		return irq; 	button = devm_kmalloc(&pdev->dev, sizeof(*button), GFP_KERNEL);	if (!button)		return -ENOMEM; 	button->idev = devm_input_allocate_device(&pdev->dev);	if (!button->idev)		return -ENOMEM; 	button->regmap = dev_get_regmap(pdev->dev.parent, NULL);	if (!button->regmap)		return -ENODEV; 	button->dev = &pdev->dev; 	button->idev->name = "cpcap-pwrbutton";	button->idev->phys = "cpcap-pwrbutton/input0";	input_set_capability(button->idev, EV_KEY, KEY_POWER); 	err = devm_request_threaded_irq(&pdev->dev, irq, NULL,		powerbutton_irq, IRQF_ONESHOT, "cpcap_pwrbutton", button);	if (err < 0) {		dev_err(&pdev->dev, "IRQ request failed: %d\n", err);		return err;	} 	err = input_register_device(button->idev);	if (err) {		dev_err(&pdev->dev, "Input register failed: %d\n", err);		return err;	} 	device_init_wakeup(&pdev->dev, true); 	return 0;} #ifdef CONFIG_OFstatic const struct of_device_id cpcap_pwrbutton_dt_match_table[] = {	{ .compatible = "motorola,cpcap-pwrbutton" },	{},};MODULE_DEVICE_TABLE(of, cpcap_pwrbutton_dt_match_table);#endif static struct platform_driver cpcap_power_button_driver = {	.probe		= cpcap_power_button_probe,	.driver		= {		.name	= "cpcap-pwrbutton",		.of_match_table = of_match_ptr(cpcap_pwrbutton_dt_match_table),	},};module_platform_driver(cpcap_power_button_driver); MODULE_ALIAS("platform:cpcap-pwrbutton");MODULE_DESCRIPTION("CPCAP Power Button");MODULE_LICENSE("GPL");MODULE_AUTHOR("Sebastian Reichel <sre@kernel.org>");