169 lines
4.3 KiB
C
169 lines
4.3 KiB
C
/*
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* Marvell 88PM80x ONKEY driver
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*
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* Copyright (C) 2012 Marvell International Ltd.
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* Haojian Zhuang <haojian.zhuang@marvell.com>
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* Qiao Zhou <zhouqiao@marvell.com>
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*
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* This file is subject to the terms and conditions of the GNU General
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* Public License. See the file "COPYING" in the main directory of this
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* archive for more details.
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/input.h>
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#include <linux/mfd/88pm80x.h>
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#include <linux/regmap.h>
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#include <linux/slab.h>
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#define PM800_LONG_ONKEY_EN (1 << 0)
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#define PM800_LONG_KEY_DELAY (8) /* 1 .. 16 seconds */
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#define PM800_LONKEY_PRESS_TIME ((PM800_LONG_KEY_DELAY-1) << 4)
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#define PM800_LONKEY_PRESS_TIME_MASK (0xF0)
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#define PM800_SW_PDOWN (1 << 5)
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struct pm80x_onkey_info {
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struct input_dev *idev;
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struct pm80x_chip *pm80x;
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struct regmap *map;
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int irq;
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};
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/* 88PM80x gives us an interrupt when ONKEY is held */
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static irqreturn_t pm80x_onkey_handler(int irq, void *data)
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{
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struct pm80x_onkey_info *info = data;
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int ret = 0;
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unsigned int val;
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ret = regmap_read(info->map, PM800_STATUS_1, &val);
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if (ret < 0) {
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dev_err(info->idev->dev.parent, "failed to read status: %d\n", ret);
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return IRQ_NONE;
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}
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val &= PM800_ONKEY_STS1;
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input_report_key(info->idev, KEY_POWER, val);
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input_sync(info->idev);
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return IRQ_HANDLED;
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}
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static SIMPLE_DEV_PM_OPS(pm80x_onkey_pm_ops, pm80x_dev_suspend,
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pm80x_dev_resume);
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static int pm80x_onkey_probe(struct platform_device *pdev)
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{
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struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent);
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struct pm80x_onkey_info *info;
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int err;
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info = kzalloc(sizeof(struct pm80x_onkey_info), GFP_KERNEL);
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if (!info)
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return -ENOMEM;
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info->pm80x = chip;
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info->irq = platform_get_irq(pdev, 0);
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if (info->irq < 0) {
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dev_err(&pdev->dev, "No IRQ resource!\n");
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err = -EINVAL;
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goto out;
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}
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info->map = info->pm80x->regmap;
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if (!info->map) {
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dev_err(&pdev->dev, "no regmap!\n");
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err = -EINVAL;
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goto out;
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}
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info->idev = input_allocate_device();
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if (!info->idev) {
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dev_err(&pdev->dev, "Failed to allocate input dev\n");
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err = -ENOMEM;
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goto out;
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}
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info->idev->name = "88pm80x_on";
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info->idev->phys = "88pm80x_on/input0";
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info->idev->id.bustype = BUS_I2C;
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info->idev->dev.parent = &pdev->dev;
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info->idev->evbit[0] = BIT_MASK(EV_KEY);
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__set_bit(KEY_POWER, info->idev->keybit);
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err = pm80x_request_irq(info->pm80x, info->irq, pm80x_onkey_handler,
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IRQF_ONESHOT, "onkey", info);
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if (err < 0) {
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dev_err(&pdev->dev, "Failed to request IRQ: #%d: %d\n",
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info->irq, err);
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goto out_reg;
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}
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err = input_register_device(info->idev);
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if (err) {
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dev_err(&pdev->dev, "Can't register input device: %d\n", err);
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goto out_irq;
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}
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platform_set_drvdata(pdev, info);
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/* Enable long onkey detection */
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regmap_update_bits(info->map, PM800_RTC_MISC4, PM800_LONG_ONKEY_EN,
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PM800_LONG_ONKEY_EN);
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/* Set 8-second interval */
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regmap_update_bits(info->map, PM800_RTC_MISC3,
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PM800_LONKEY_PRESS_TIME_MASK,
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PM800_LONKEY_PRESS_TIME);
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device_init_wakeup(&pdev->dev, 1);
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return 0;
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out_irq:
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pm80x_free_irq(info->pm80x, info->irq, info);
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out_reg:
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input_free_device(info->idev);
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out:
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kfree(info);
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return err;
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}
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static int pm80x_onkey_remove(struct platform_device *pdev)
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{
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struct pm80x_onkey_info *info = platform_get_drvdata(pdev);
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device_init_wakeup(&pdev->dev, 0);
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pm80x_free_irq(info->pm80x, info->irq, info);
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input_unregister_device(info->idev);
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kfree(info);
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return 0;
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}
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static struct platform_driver pm80x_onkey_driver = {
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.driver = {
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.name = "88pm80x-onkey",
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.owner = THIS_MODULE,
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.pm = &pm80x_onkey_pm_ops,
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},
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.probe = pm80x_onkey_probe,
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.remove = pm80x_onkey_remove,
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};
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module_platform_driver(pm80x_onkey_driver);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("Marvell 88PM80x ONKEY driver");
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MODULE_AUTHOR("Qiao Zhou <zhouqiao@marvell.com>");
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MODULE_ALIAS("platform:88pm80x-onkey");
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