2011-05-13 03:47:51 -06:00
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/* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/slab.h>
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#include <linux/input.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <linux/log2.h>
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#include <linux/mfd/pm8xxx/core.h>
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#include <linux/input/pmic8xxx-pwrkey.h>
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#define PON_CNTL_1 0x1C
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#define PON_CNTL_PULL_UP BIT(7)
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#define PON_CNTL_TRIG_DELAY_MASK (0x7)
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/**
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* struct pmic8xxx_pwrkey - pmic8xxx pwrkey information
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* @key_press_irq: key press irq number
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*/
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struct pmic8xxx_pwrkey {
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struct input_dev *pwr;
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int key_press_irq;
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};
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static irqreturn_t pwrkey_press_irq(int irq, void *_pwrkey)
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{
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struct pmic8xxx_pwrkey *pwrkey = _pwrkey;
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input_report_key(pwrkey->pwr, KEY_POWER, 1);
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input_sync(pwrkey->pwr);
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return IRQ_HANDLED;
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}
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static irqreturn_t pwrkey_release_irq(int irq, void *_pwrkey)
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{
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struct pmic8xxx_pwrkey *pwrkey = _pwrkey;
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input_report_key(pwrkey->pwr, KEY_POWER, 0);
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input_sync(pwrkey->pwr);
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return IRQ_HANDLED;
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}
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#ifdef CONFIG_PM_SLEEP
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static int pmic8xxx_pwrkey_suspend(struct device *dev)
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{
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struct pmic8xxx_pwrkey *pwrkey = dev_get_drvdata(dev);
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if (device_may_wakeup(dev))
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enable_irq_wake(pwrkey->key_press_irq);
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return 0;
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}
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static int pmic8xxx_pwrkey_resume(struct device *dev)
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{
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struct pmic8xxx_pwrkey *pwrkey = dev_get_drvdata(dev);
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if (device_may_wakeup(dev))
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disable_irq_wake(pwrkey->key_press_irq);
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return 0;
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}
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#endif
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static SIMPLE_DEV_PM_OPS(pm8xxx_pwr_key_pm_ops,
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pmic8xxx_pwrkey_suspend, pmic8xxx_pwrkey_resume);
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2012-11-23 22:38:25 -07:00
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static int pmic8xxx_pwrkey_probe(struct platform_device *pdev)
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2011-05-13 03:47:51 -06:00
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{
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struct input_dev *pwr;
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int key_release_irq = platform_get_irq(pdev, 0);
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int key_press_irq = platform_get_irq(pdev, 1);
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int err;
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unsigned int delay;
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u8 pon_cntl;
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struct pmic8xxx_pwrkey *pwrkey;
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2011-06-08 03:06:30 -06:00
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const struct pm8xxx_pwrkey_platform_data *pdata =
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dev_get_platdata(&pdev->dev);
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2011-05-13 03:47:51 -06:00
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if (!pdata) {
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dev_err(&pdev->dev, "power key platform data not supplied\n");
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return -EINVAL;
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}
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if (pdata->kpd_trigger_delay_us > 62500) {
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dev_err(&pdev->dev, "invalid power key trigger delay\n");
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return -EINVAL;
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}
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pwrkey = kzalloc(sizeof(*pwrkey), GFP_KERNEL);
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if (!pwrkey)
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return -ENOMEM;
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pwr = input_allocate_device();
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if (!pwr) {
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dev_dbg(&pdev->dev, "Can't allocate power button\n");
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err = -ENOMEM;
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goto free_pwrkey;
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}
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input_set_capability(pwr, EV_KEY, KEY_POWER);
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pwr->name = "pmic8xxx_pwrkey";
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pwr->phys = "pmic8xxx_pwrkey/input0";
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pwr->dev.parent = &pdev->dev;
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delay = (pdata->kpd_trigger_delay_us << 10) / USEC_PER_SEC;
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delay = 1 + ilog2(delay);
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err = pm8xxx_readb(pdev->dev.parent, PON_CNTL_1, &pon_cntl);
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if (err < 0) {
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dev_err(&pdev->dev, "failed reading PON_CNTL_1 err=%d\n", err);
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goto free_input_dev;
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}
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pon_cntl &= ~PON_CNTL_TRIG_DELAY_MASK;
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pon_cntl |= (delay & PON_CNTL_TRIG_DELAY_MASK);
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if (pdata->pull_up)
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pon_cntl |= PON_CNTL_PULL_UP;
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else
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pon_cntl &= ~PON_CNTL_PULL_UP;
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err = pm8xxx_writeb(pdev->dev.parent, PON_CNTL_1, pon_cntl);
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if (err < 0) {
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dev_err(&pdev->dev, "failed writing PON_CNTL_1 err=%d\n", err);
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goto free_input_dev;
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}
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err = input_register_device(pwr);
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if (err) {
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dev_dbg(&pdev->dev, "Can't register power key: %d\n", err);
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goto free_input_dev;
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}
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pwrkey->key_press_irq = key_press_irq;
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pwrkey->pwr = pwr;
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platform_set_drvdata(pdev, pwrkey);
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err = request_irq(key_press_irq, pwrkey_press_irq,
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IRQF_TRIGGER_RISING, "pmic8xxx_pwrkey_press", pwrkey);
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if (err < 0) {
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dev_dbg(&pdev->dev, "Can't get %d IRQ for pwrkey: %d\n",
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key_press_irq, err);
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goto unreg_input_dev;
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}
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err = request_irq(key_release_irq, pwrkey_release_irq,
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IRQF_TRIGGER_RISING, "pmic8xxx_pwrkey_release", pwrkey);
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if (err < 0) {
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dev_dbg(&pdev->dev, "Can't get %d IRQ for pwrkey: %d\n",
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key_release_irq, err);
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goto free_press_irq;
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}
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device_init_wakeup(&pdev->dev, pdata->wakeup);
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return 0;
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free_press_irq:
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2013-05-23 10:30:19 -06:00
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free_irq(key_press_irq, pwrkey);
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2011-05-13 03:47:51 -06:00
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unreg_input_dev:
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input_unregister_device(pwr);
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pwr = NULL;
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free_input_dev:
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input_free_device(pwr);
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free_pwrkey:
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kfree(pwrkey);
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return err;
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}
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2012-11-23 22:50:47 -07:00
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static int pmic8xxx_pwrkey_remove(struct platform_device *pdev)
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2011-05-13 03:47:51 -06:00
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{
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struct pmic8xxx_pwrkey *pwrkey = platform_get_drvdata(pdev);
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int key_release_irq = platform_get_irq(pdev, 0);
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int key_press_irq = platform_get_irq(pdev, 1);
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device_init_wakeup(&pdev->dev, 0);
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free_irq(key_press_irq, pwrkey);
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free_irq(key_release_irq, pwrkey);
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input_unregister_device(pwrkey->pwr);
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kfree(pwrkey);
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return 0;
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}
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static struct platform_driver pmic8xxx_pwrkey_driver = {
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.probe = pmic8xxx_pwrkey_probe,
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2012-11-23 22:27:39 -07:00
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.remove = pmic8xxx_pwrkey_remove,
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2011-05-13 03:47:51 -06:00
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.driver = {
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.name = PM8XXX_PWRKEY_DEV_NAME,
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.owner = THIS_MODULE,
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.pm = &pm8xxx_pwr_key_pm_ops,
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},
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};
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2011-11-29 12:08:40 -07:00
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module_platform_driver(pmic8xxx_pwrkey_driver);
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2011-05-13 03:47:51 -06:00
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MODULE_ALIAS("platform:pmic8xxx_pwrkey");
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MODULE_DESCRIPTION("PMIC8XXX Power Key driver");
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MODULE_LICENSE("GPL v2");
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MODULE_AUTHOR("Trilok Soni <tsoni@codeaurora.org>");
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