19eb9cc93SPascal PAILLET-LME // SPDX-License-Identifier: GPL-2.0
29eb9cc93SPascal PAILLET-LME // Copyright (C) STMicroelectronics 2018
39eb9cc93SPascal PAILLET-LME // Author: Pascal Paillet <p.paillet@st.com> for STMicroelectronics.
49eb9cc93SPascal PAILLET-LME
59eb9cc93SPascal PAILLET-LME #include <linux/input.h>
69eb9cc93SPascal PAILLET-LME #include <linux/interrupt.h>
79eb9cc93SPascal PAILLET-LME #include <linux/mfd/stpmic1.h>
89eb9cc93SPascal PAILLET-LME #include <linux/module.h>
99eb9cc93SPascal PAILLET-LME #include <linux/of.h>
109eb9cc93SPascal PAILLET-LME #include <linux/platform_device.h>
119eb9cc93SPascal PAILLET-LME #include <linux/property.h>
129eb9cc93SPascal PAILLET-LME #include <linux/regmap.h>
139eb9cc93SPascal PAILLET-LME
149eb9cc93SPascal PAILLET-LME /**
159eb9cc93SPascal PAILLET-LME * struct stpmic1_onkey - OnKey data
169eb9cc93SPascal PAILLET-LME * @input_dev: pointer to input device
179eb9cc93SPascal PAILLET-LME * @irq_falling: irq that we are hooked on to
189eb9cc93SPascal PAILLET-LME * @irq_rising: irq that we are hooked on to
199eb9cc93SPascal PAILLET-LME */
209eb9cc93SPascal PAILLET-LME struct stpmic1_onkey {
219eb9cc93SPascal PAILLET-LME struct input_dev *input_dev;
229eb9cc93SPascal PAILLET-LME int irq_falling;
239eb9cc93SPascal PAILLET-LME int irq_rising;
249eb9cc93SPascal PAILLET-LME };
259eb9cc93SPascal PAILLET-LME
onkey_falling_irq(int irq,void * ponkey)269eb9cc93SPascal PAILLET-LME static irqreturn_t onkey_falling_irq(int irq, void *ponkey)
279eb9cc93SPascal PAILLET-LME {
289eb9cc93SPascal PAILLET-LME struct stpmic1_onkey *onkey = ponkey;
299eb9cc93SPascal PAILLET-LME struct input_dev *input_dev = onkey->input_dev;
309eb9cc93SPascal PAILLET-LME
319eb9cc93SPascal PAILLET-LME input_report_key(input_dev, KEY_POWER, 1);
329eb9cc93SPascal PAILLET-LME pm_wakeup_event(input_dev->dev.parent, 0);
339eb9cc93SPascal PAILLET-LME input_sync(input_dev);
349eb9cc93SPascal PAILLET-LME
359eb9cc93SPascal PAILLET-LME return IRQ_HANDLED;
369eb9cc93SPascal PAILLET-LME }
379eb9cc93SPascal PAILLET-LME
onkey_rising_irq(int irq,void * ponkey)389eb9cc93SPascal PAILLET-LME static irqreturn_t onkey_rising_irq(int irq, void *ponkey)
399eb9cc93SPascal PAILLET-LME {
409eb9cc93SPascal PAILLET-LME struct stpmic1_onkey *onkey = ponkey;
419eb9cc93SPascal PAILLET-LME struct input_dev *input_dev = onkey->input_dev;
429eb9cc93SPascal PAILLET-LME
439eb9cc93SPascal PAILLET-LME input_report_key(input_dev, KEY_POWER, 0);
449eb9cc93SPascal PAILLET-LME pm_wakeup_event(input_dev->dev.parent, 0);
459eb9cc93SPascal PAILLET-LME input_sync(input_dev);
469eb9cc93SPascal PAILLET-LME
479eb9cc93SPascal PAILLET-LME return IRQ_HANDLED;
489eb9cc93SPascal PAILLET-LME }
499eb9cc93SPascal PAILLET-LME
stpmic1_onkey_probe(struct platform_device * pdev)509eb9cc93SPascal PAILLET-LME static int stpmic1_onkey_probe(struct platform_device *pdev)
519eb9cc93SPascal PAILLET-LME {
529eb9cc93SPascal PAILLET-LME struct stpmic1 *pmic = dev_get_drvdata(pdev->dev.parent);
539eb9cc93SPascal PAILLET-LME struct device *dev = &pdev->dev;
549eb9cc93SPascal PAILLET-LME struct input_dev *input_dev;
559eb9cc93SPascal PAILLET-LME struct stpmic1_onkey *onkey;
569eb9cc93SPascal PAILLET-LME unsigned int val, reg = 0;
579eb9cc93SPascal PAILLET-LME int error;
589eb9cc93SPascal PAILLET-LME
599eb9cc93SPascal PAILLET-LME onkey = devm_kzalloc(dev, sizeof(*onkey), GFP_KERNEL);
609eb9cc93SPascal PAILLET-LME if (!onkey)
619eb9cc93SPascal PAILLET-LME return -ENOMEM;
629eb9cc93SPascal PAILLET-LME
639eb9cc93SPascal PAILLET-LME onkey->irq_falling = platform_get_irq_byname(pdev, "onkey-falling");
640bec8b7eSStephen Boyd if (onkey->irq_falling < 0)
659eb9cc93SPascal PAILLET-LME return onkey->irq_falling;
669eb9cc93SPascal PAILLET-LME
679eb9cc93SPascal PAILLET-LME onkey->irq_rising = platform_get_irq_byname(pdev, "onkey-rising");
680bec8b7eSStephen Boyd if (onkey->irq_rising < 0)
699eb9cc93SPascal PAILLET-LME return onkey->irq_rising;
709eb9cc93SPascal PAILLET-LME
719eb9cc93SPascal PAILLET-LME if (!device_property_read_u32(dev, "power-off-time-sec", &val)) {
729eb9cc93SPascal PAILLET-LME if (val > 0 && val <= 16) {
739eb9cc93SPascal PAILLET-LME dev_dbg(dev, "power-off-time=%d seconds\n", val);
749eb9cc93SPascal PAILLET-LME reg |= PONKEY_PWR_OFF;
759eb9cc93SPascal PAILLET-LME reg |= ((16 - val) & PONKEY_TURNOFF_TIMER_MASK);
769eb9cc93SPascal PAILLET-LME } else {
779eb9cc93SPascal PAILLET-LME dev_err(dev, "power-off-time-sec out of range\n");
789eb9cc93SPascal PAILLET-LME return -EINVAL;
799eb9cc93SPascal PAILLET-LME }
809eb9cc93SPascal PAILLET-LME }
819eb9cc93SPascal PAILLET-LME
829eb9cc93SPascal PAILLET-LME if (device_property_present(dev, "st,onkey-clear-cc-flag"))
839eb9cc93SPascal PAILLET-LME reg |= PONKEY_CC_FLAG_CLEAR;
849eb9cc93SPascal PAILLET-LME
859eb9cc93SPascal PAILLET-LME error = regmap_update_bits(pmic->regmap, PKEY_TURNOFF_CR,
869eb9cc93SPascal PAILLET-LME PONKEY_TURNOFF_MASK, reg);
879eb9cc93SPascal PAILLET-LME if (error) {
889eb9cc93SPascal PAILLET-LME dev_err(dev, "PKEY_TURNOFF_CR write failed: %d\n", error);
899eb9cc93SPascal PAILLET-LME return error;
909eb9cc93SPascal PAILLET-LME }
919eb9cc93SPascal PAILLET-LME
929eb9cc93SPascal PAILLET-LME if (device_property_present(dev, "st,onkey-pu-inactive")) {
939eb9cc93SPascal PAILLET-LME error = regmap_update_bits(pmic->regmap, PADS_PULL_CR,
949eb9cc93SPascal PAILLET-LME PONKEY_PU_INACTIVE,
959eb9cc93SPascal PAILLET-LME PONKEY_PU_INACTIVE);
969eb9cc93SPascal PAILLET-LME if (error) {
979eb9cc93SPascal PAILLET-LME dev_err(dev, "ONKEY Pads configuration failed: %d\n",
989eb9cc93SPascal PAILLET-LME error);
999eb9cc93SPascal PAILLET-LME return error;
1009eb9cc93SPascal PAILLET-LME }
1019eb9cc93SPascal PAILLET-LME }
1029eb9cc93SPascal PAILLET-LME
1039eb9cc93SPascal PAILLET-LME input_dev = devm_input_allocate_device(dev);
1049eb9cc93SPascal PAILLET-LME if (!input_dev) {
1059eb9cc93SPascal PAILLET-LME dev_err(dev, "Can't allocate Pwr Onkey Input Device\n");
1069eb9cc93SPascal PAILLET-LME return -ENOMEM;
1079eb9cc93SPascal PAILLET-LME }
1089eb9cc93SPascal PAILLET-LME
1099eb9cc93SPascal PAILLET-LME input_dev->name = "pmic_onkey";
1109eb9cc93SPascal PAILLET-LME input_dev->phys = "pmic_onkey/input0";
1119eb9cc93SPascal PAILLET-LME
1129eb9cc93SPascal PAILLET-LME input_set_capability(input_dev, EV_KEY, KEY_POWER);
1139eb9cc93SPascal PAILLET-LME
1149eb9cc93SPascal PAILLET-LME onkey->input_dev = input_dev;
1159eb9cc93SPascal PAILLET-LME
1169eb9cc93SPascal PAILLET-LME /* interrupt is nested in a thread */
1179eb9cc93SPascal PAILLET-LME error = devm_request_threaded_irq(dev, onkey->irq_falling, NULL,
1189eb9cc93SPascal PAILLET-LME onkey_falling_irq, IRQF_ONESHOT,
1199eb9cc93SPascal PAILLET-LME dev_name(dev), onkey);
1209eb9cc93SPascal PAILLET-LME if (error) {
1219eb9cc93SPascal PAILLET-LME dev_err(dev, "Can't get IRQ Onkey Falling: %d\n", error);
1229eb9cc93SPascal PAILLET-LME return error;
1239eb9cc93SPascal PAILLET-LME }
1249eb9cc93SPascal PAILLET-LME
1259eb9cc93SPascal PAILLET-LME error = devm_request_threaded_irq(dev, onkey->irq_rising, NULL,
1269eb9cc93SPascal PAILLET-LME onkey_rising_irq, IRQF_ONESHOT,
1279eb9cc93SPascal PAILLET-LME dev_name(dev), onkey);
1289eb9cc93SPascal PAILLET-LME if (error) {
1299eb9cc93SPascal PAILLET-LME dev_err(dev, "Can't get IRQ Onkey Rising: %d\n", error);
1309eb9cc93SPascal PAILLET-LME return error;
1319eb9cc93SPascal PAILLET-LME }
1329eb9cc93SPascal PAILLET-LME
1339eb9cc93SPascal PAILLET-LME error = input_register_device(input_dev);
1349eb9cc93SPascal PAILLET-LME if (error) {
1359eb9cc93SPascal PAILLET-LME dev_err(dev, "Can't register power button: %d\n", error);
1369eb9cc93SPascal PAILLET-LME return error;
1379eb9cc93SPascal PAILLET-LME }
1389eb9cc93SPascal PAILLET-LME
1399eb9cc93SPascal PAILLET-LME platform_set_drvdata(pdev, onkey);
1409eb9cc93SPascal PAILLET-LME device_init_wakeup(dev, true);
1419eb9cc93SPascal PAILLET-LME
1429eb9cc93SPascal PAILLET-LME return 0;
1439eb9cc93SPascal PAILLET-LME }
1449eb9cc93SPascal PAILLET-LME
stpmic1_onkey_suspend(struct device * dev)145*5057e0aaSJonathan Cameron static int stpmic1_onkey_suspend(struct device *dev)
1469eb9cc93SPascal PAILLET-LME {
1479eb9cc93SPascal PAILLET-LME struct platform_device *pdev = to_platform_device(dev);
1489eb9cc93SPascal PAILLET-LME struct stpmic1_onkey *onkey = platform_get_drvdata(pdev);
1499eb9cc93SPascal PAILLET-LME
1509eb9cc93SPascal PAILLET-LME if (device_may_wakeup(dev)) {
1519eb9cc93SPascal PAILLET-LME enable_irq_wake(onkey->irq_falling);
1529eb9cc93SPascal PAILLET-LME enable_irq_wake(onkey->irq_rising);
1539eb9cc93SPascal PAILLET-LME }
1549eb9cc93SPascal PAILLET-LME return 0;
1559eb9cc93SPascal PAILLET-LME }
1569eb9cc93SPascal PAILLET-LME
stpmic1_onkey_resume(struct device * dev)157*5057e0aaSJonathan Cameron static int stpmic1_onkey_resume(struct device *dev)
1589eb9cc93SPascal PAILLET-LME {
1599eb9cc93SPascal PAILLET-LME struct platform_device *pdev = to_platform_device(dev);
1609eb9cc93SPascal PAILLET-LME struct stpmic1_onkey *onkey = platform_get_drvdata(pdev);
1619eb9cc93SPascal PAILLET-LME
1629eb9cc93SPascal PAILLET-LME if (device_may_wakeup(dev)) {
1639eb9cc93SPascal PAILLET-LME disable_irq_wake(onkey->irq_falling);
1649eb9cc93SPascal PAILLET-LME disable_irq_wake(onkey->irq_rising);
1659eb9cc93SPascal PAILLET-LME }
1669eb9cc93SPascal PAILLET-LME return 0;
1679eb9cc93SPascal PAILLET-LME }
1689eb9cc93SPascal PAILLET-LME
169*5057e0aaSJonathan Cameron static DEFINE_SIMPLE_DEV_PM_OPS(stpmic1_onkey_pm,
1709eb9cc93SPascal PAILLET-LME stpmic1_onkey_suspend,
1719eb9cc93SPascal PAILLET-LME stpmic1_onkey_resume);
1729eb9cc93SPascal PAILLET-LME
1739eb9cc93SPascal PAILLET-LME static const struct of_device_id of_stpmic1_onkey_match[] = {
1749eb9cc93SPascal PAILLET-LME { .compatible = "st,stpmic1-onkey" },
1759eb9cc93SPascal PAILLET-LME { },
1769eb9cc93SPascal PAILLET-LME };
1779eb9cc93SPascal PAILLET-LME
1789eb9cc93SPascal PAILLET-LME MODULE_DEVICE_TABLE(of, of_stpmic1_onkey_match);
1799eb9cc93SPascal PAILLET-LME
1809eb9cc93SPascal PAILLET-LME static struct platform_driver stpmic1_onkey_driver = {
1819eb9cc93SPascal PAILLET-LME .probe = stpmic1_onkey_probe,
1829eb9cc93SPascal PAILLET-LME .driver = {
1839eb9cc93SPascal PAILLET-LME .name = "stpmic1_onkey",
1849eb9cc93SPascal PAILLET-LME .of_match_table = of_match_ptr(of_stpmic1_onkey_match),
185*5057e0aaSJonathan Cameron .pm = pm_sleep_ptr(&stpmic1_onkey_pm),
1869eb9cc93SPascal PAILLET-LME },
1879eb9cc93SPascal PAILLET-LME };
1889eb9cc93SPascal PAILLET-LME module_platform_driver(stpmic1_onkey_driver);
1899eb9cc93SPascal PAILLET-LME
1909eb9cc93SPascal PAILLET-LME MODULE_DESCRIPTION("Onkey driver for STPMIC1");
1919eb9cc93SPascal PAILLET-LME MODULE_AUTHOR("Pascal Paillet <p.paillet@st.com>");
1929eb9cc93SPascal PAILLET-LME MODULE_LICENSE("GPL v2");
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