From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- drivers/input/misc/pmic8xxx-pwrkey.c | 205 +++++++++++++++++++++++++++++++++++ 1 file changed, 205 insertions(+) create mode 100644 drivers/input/misc/pmic8xxx-pwrkey.c (limited to 'drivers/input/misc/pmic8xxx-pwrkey.c') diff --git a/drivers/input/misc/pmic8xxx-pwrkey.c b/drivers/input/misc/pmic8xxx-pwrkey.c new file mode 100644 index 000000000..c4ca20e63 --- /dev/null +++ b/drivers/input/misc/pmic8xxx-pwrkey.c @@ -0,0 +1,205 @@ +/* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define PON_CNTL_1 0x1C +#define PON_CNTL_PULL_UP BIT(7) +#define PON_CNTL_TRIG_DELAY_MASK (0x7) + +/** + * struct pmic8xxx_pwrkey - pmic8xxx pwrkey information + * @key_press_irq: key press irq number + */ +struct pmic8xxx_pwrkey { + int key_press_irq; +}; + +static irqreturn_t pwrkey_press_irq(int irq, void *_pwr) +{ + struct input_dev *pwr = _pwr; + + input_report_key(pwr, KEY_POWER, 1); + input_sync(pwr); + + return IRQ_HANDLED; +} + +static irqreturn_t pwrkey_release_irq(int irq, void *_pwr) +{ + struct input_dev *pwr = _pwr; + + input_report_key(pwr, KEY_POWER, 0); + input_sync(pwr); + + return IRQ_HANDLED; +} + +static int __maybe_unused pmic8xxx_pwrkey_suspend(struct device *dev) +{ + struct pmic8xxx_pwrkey *pwrkey = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + enable_irq_wake(pwrkey->key_press_irq); + + return 0; +} + +static int __maybe_unused pmic8xxx_pwrkey_resume(struct device *dev) +{ + struct pmic8xxx_pwrkey *pwrkey = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + disable_irq_wake(pwrkey->key_press_irq); + + return 0; +} + +static SIMPLE_DEV_PM_OPS(pm8xxx_pwr_key_pm_ops, + pmic8xxx_pwrkey_suspend, pmic8xxx_pwrkey_resume); + +static int pmic8xxx_pwrkey_probe(struct platform_device *pdev) +{ + struct input_dev *pwr; + int key_release_irq = platform_get_irq(pdev, 0); + int key_press_irq = platform_get_irq(pdev, 1); + int err; + unsigned int delay; + unsigned int pon_cntl; + struct regmap *regmap; + struct pmic8xxx_pwrkey *pwrkey; + u32 kpd_delay; + bool pull_up; + + if (of_property_read_u32(pdev->dev.of_node, "debounce", &kpd_delay)) + kpd_delay = 15625; + + if (kpd_delay > 62500 || kpd_delay == 0) { + dev_err(&pdev->dev, "invalid power key trigger delay\n"); + return -EINVAL; + } + + pull_up = of_property_read_bool(pdev->dev.of_node, "pull-up"); + + regmap = dev_get_regmap(pdev->dev.parent, NULL); + if (!regmap) { + dev_err(&pdev->dev, "failed to locate regmap for the device\n"); + return -ENODEV; + } + + pwrkey = devm_kzalloc(&pdev->dev, sizeof(*pwrkey), GFP_KERNEL); + if (!pwrkey) + return -ENOMEM; + + pwrkey->key_press_irq = key_press_irq; + + pwr = devm_input_allocate_device(&pdev->dev); + if (!pwr) { + dev_dbg(&pdev->dev, "Can't allocate power button\n"); + return -ENOMEM; + } + + input_set_capability(pwr, EV_KEY, KEY_POWER); + + pwr->name = "pmic8xxx_pwrkey"; + pwr->phys = "pmic8xxx_pwrkey/input0"; + + delay = (kpd_delay << 10) / USEC_PER_SEC; + delay = 1 + ilog2(delay); + + err = regmap_read(regmap, PON_CNTL_1, &pon_cntl); + if (err < 0) { + dev_err(&pdev->dev, "failed reading PON_CNTL_1 err=%d\n", err); + return err; + } + + pon_cntl &= ~PON_CNTL_TRIG_DELAY_MASK; + pon_cntl |= (delay & PON_CNTL_TRIG_DELAY_MASK); + if (pull_up) + pon_cntl |= PON_CNTL_PULL_UP; + else + pon_cntl &= ~PON_CNTL_PULL_UP; + + err = regmap_write(regmap, PON_CNTL_1, pon_cntl); + if (err < 0) { + dev_err(&pdev->dev, "failed writing PON_CNTL_1 err=%d\n", err); + return err; + } + + err = devm_request_irq(&pdev->dev, key_press_irq, pwrkey_press_irq, + IRQF_TRIGGER_RISING, + "pmic8xxx_pwrkey_press", pwr); + if (err) { + dev_err(&pdev->dev, "Can't get %d IRQ for pwrkey: %d\n", + key_press_irq, err); + return err; + } + + err = devm_request_irq(&pdev->dev, key_release_irq, pwrkey_release_irq, + IRQF_TRIGGER_RISING, + "pmic8xxx_pwrkey_release", pwr); + if (err) { + dev_err(&pdev->dev, "Can't get %d IRQ for pwrkey: %d\n", + key_release_irq, err); + return err; + } + + err = input_register_device(pwr); + if (err) { + dev_err(&pdev->dev, "Can't register power key: %d\n", err); + return err; + } + + platform_set_drvdata(pdev, pwrkey); + device_init_wakeup(&pdev->dev, 1); + + return 0; +} + +static int pmic8xxx_pwrkey_remove(struct platform_device *pdev) +{ + device_init_wakeup(&pdev->dev, 0); + + return 0; +} + +static const struct of_device_id pm8xxx_pwr_key_id_table[] = { + { .compatible = "qcom,pm8058-pwrkey" }, + { .compatible = "qcom,pm8921-pwrkey" }, + { } +}; +MODULE_DEVICE_TABLE(of, pm8xxx_pwr_key_id_table); + +static struct platform_driver pmic8xxx_pwrkey_driver = { + .probe = pmic8xxx_pwrkey_probe, + .remove = pmic8xxx_pwrkey_remove, + .driver = { + .name = "pm8xxx-pwrkey", + .pm = &pm8xxx_pwr_key_pm_ops, + .of_match_table = pm8xxx_pwr_key_id_table, + }, +}; +module_platform_driver(pmic8xxx_pwrkey_driver); + +MODULE_ALIAS("platform:pmic8xxx_pwrkey"); +MODULE_DESCRIPTION("PMIC8XXX Power Key driver"); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Trilok Soni "); -- cgit v1.2.3-54-g00ecf