// SPDX-License-Identifier: GPL-2.0
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// Copyright (C) STMicroelectronics 2018
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// Author: Pascal Paillet <p.paillet@st.com> for STMicroelectronics.
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#include <linux/input.h>
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#include <linux/interrupt.h>
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#include <linux/mfd/stpmic1.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/property.h>
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#include <linux/regmap.h>
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/**
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* struct stpmic1_onkey - OnKey data
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* @input_dev: pointer to input device
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* @irq_falling: irq that we are hooked on to
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* @irq_rising: irq that we are hooked on to
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*/
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struct stpmic1_onkey {
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struct input_dev *input_dev;
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int irq_falling;
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int irq_rising;
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};
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static irqreturn_t onkey_falling_irq(int irq, void *ponkey)
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{
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struct stpmic1_onkey *onkey = ponkey;
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struct input_dev *input_dev = onkey->input_dev;
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input_report_key(input_dev, KEY_POWER, 1);
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pm_wakeup_event(input_dev->dev.parent, 0);
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input_sync(input_dev);
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return IRQ_HANDLED;
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}
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static irqreturn_t onkey_rising_irq(int irq, void *ponkey)
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{
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struct stpmic1_onkey *onkey = ponkey;
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struct input_dev *input_dev = onkey->input_dev;
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input_report_key(input_dev, KEY_POWER, 0);
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pm_wakeup_event(input_dev->dev.parent, 0);
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input_sync(input_dev);
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return IRQ_HANDLED;
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}
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static int stpmic1_onkey_probe(struct platform_device *pdev)
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{
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struct stpmic1 *pmic = dev_get_drvdata(pdev->dev.parent);
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struct device *dev = &pdev->dev;
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struct input_dev *input_dev;
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struct stpmic1_onkey *onkey;
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unsigned int val, reg = 0;
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int error;
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onkey = devm_kzalloc(dev, sizeof(*onkey), GFP_KERNEL);
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if (!onkey)
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return -ENOMEM;
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onkey->irq_falling = platform_get_irq_byname(pdev, "onkey-falling");
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if (onkey->irq_falling < 0)
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return onkey->irq_falling;
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onkey->irq_rising = platform_get_irq_byname(pdev, "onkey-rising");
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if (onkey->irq_rising < 0)
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return onkey->irq_rising;
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if (!device_property_read_u32(dev, "power-off-time-sec", &val)) {
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if (val > 0 && val <= 16) {
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dev_dbg(dev, "power-off-time=%d seconds\n", val);
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reg |= PONKEY_PWR_OFF;
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reg |= ((16 - val) & PONKEY_TURNOFF_TIMER_MASK);
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} else {
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dev_err(dev, "power-off-time-sec out of range\n");
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return -EINVAL;
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}
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}
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if (device_property_present(dev, "st,onkey-clear-cc-flag"))
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reg |= PONKEY_CC_FLAG_CLEAR;
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error = regmap_update_bits(pmic->regmap, PKEY_TURNOFF_CR,
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PONKEY_TURNOFF_MASK, reg);
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if (error) {
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dev_err(dev, "PKEY_TURNOFF_CR write failed: %d\n", error);
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return error;
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}
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if (device_property_present(dev, "st,onkey-pu-inactive")) {
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error = regmap_update_bits(pmic->regmap, PADS_PULL_CR,
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PONKEY_PU_INACTIVE,
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PONKEY_PU_INACTIVE);
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if (error) {
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dev_err(dev, "ONKEY Pads configuration failed: %d\n",
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error);
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return error;
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}
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}
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input_dev = devm_input_allocate_device(dev);
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if (!input_dev) {
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dev_err(dev, "Can't allocate Pwr Onkey Input Device\n");
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return -ENOMEM;
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}
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input_dev->name = "pmic_onkey";
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input_dev->phys = "pmic_onkey/input0";
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input_set_capability(input_dev, EV_KEY, KEY_POWER);
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onkey->input_dev = input_dev;
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/* interrupt is nested in a thread */
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error = devm_request_threaded_irq(dev, onkey->irq_falling, NULL,
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onkey_falling_irq, IRQF_ONESHOT,
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dev_name(dev), onkey);
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if (error) {
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dev_err(dev, "Can't get IRQ Onkey Falling: %d\n", error);
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return error;
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}
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error = devm_request_threaded_irq(dev, onkey->irq_rising, NULL,
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onkey_rising_irq, IRQF_ONESHOT,
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dev_name(dev), onkey);
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if (error) {
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dev_err(dev, "Can't get IRQ Onkey Rising: %d\n", error);
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return error;
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}
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error = input_register_device(input_dev);
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if (error) {
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dev_err(dev, "Can't register power button: %d\n", error);
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return error;
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}
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platform_set_drvdata(pdev, onkey);
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device_init_wakeup(dev, true);
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return 0;
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}
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static int __maybe_unused stpmic1_onkey_suspend(struct device *dev)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct stpmic1_onkey *onkey = platform_get_drvdata(pdev);
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if (device_may_wakeup(dev)) {
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enable_irq_wake(onkey->irq_falling);
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enable_irq_wake(onkey->irq_rising);
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}
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return 0;
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}
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static int __maybe_unused stpmic1_onkey_resume(struct device *dev)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct stpmic1_onkey *onkey = platform_get_drvdata(pdev);
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if (device_may_wakeup(dev)) {
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disable_irq_wake(onkey->irq_falling);
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disable_irq_wake(onkey->irq_rising);
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}
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return 0;
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}
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static SIMPLE_DEV_PM_OPS(stpmic1_onkey_pm,
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stpmic1_onkey_suspend,
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stpmic1_onkey_resume);
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static const struct of_device_id of_stpmic1_onkey_match[] = {
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{ .compatible = "st,stpmic1-onkey" },
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{ },
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};
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MODULE_DEVICE_TABLE(of, of_stpmic1_onkey_match);
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static struct platform_driver stpmic1_onkey_driver = {
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.probe = stpmic1_onkey_probe,
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.driver = {
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.name = "stpmic1_onkey",
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.of_match_table = of_match_ptr(of_stpmic1_onkey_match),
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.pm = &stpmic1_onkey_pm,
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},
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};
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module_platform_driver(stpmic1_onkey_driver);
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MODULE_DESCRIPTION("Onkey driver for STPMIC1");
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MODULE_AUTHOR("Pascal Paillet <p.paillet@st.com>");
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MODULE_LICENSE("GPL v2");
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