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145 lines
4.0 KiB
145 lines
4.0 KiB
/* |
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* 88pm860x_onkey.c - Marvell 88PM860x ONKEY driver |
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* |
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* Copyright (C) 2009-2010 Marvell International Ltd. |
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* Haojian Zhuang <[email protected]> |
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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/platform_device.h> |
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#include <linux/i2c.h> |
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#include <linux/input.h> |
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#include <linux/interrupt.h> |
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#include <linux/mfd/88pm860x.h> |
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#include <linux/slab.h> |
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#include <linux/device.h> |
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#define PM8607_WAKEUP 0x0b |
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#define LONG_ONKEY_EN (1 << 1) |
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#define ONKEY_STATUS (1 << 0) |
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struct pm860x_onkey_info { |
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struct input_dev *idev; |
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struct pm860x_chip *chip; |
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struct i2c_client *i2c; |
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struct device *dev; |
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int irq; |
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}; |
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/* 88PM860x gives us an interrupt when ONKEY is held */ |
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static irqreturn_t pm860x_onkey_handler(int irq, void *data) |
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{ |
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struct pm860x_onkey_info *info = data; |
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int ret; |
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ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2); |
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ret &= ONKEY_STATUS; |
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input_report_key(info->idev, KEY_POWER, ret); |
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input_sync(info->idev); |
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/* Enable 8-second long onkey detection */ |
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pm860x_set_bits(info->i2c, PM8607_WAKEUP, 3, LONG_ONKEY_EN); |
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return IRQ_HANDLED; |
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} |
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static int pm860x_onkey_probe(struct platform_device *pdev) |
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{ |
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struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent); |
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struct pm860x_onkey_info *info; |
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int irq, ret; |
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irq = platform_get_irq(pdev, 0); |
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if (irq < 0) |
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return -EINVAL; |
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info = devm_kzalloc(&pdev->dev, sizeof(struct pm860x_onkey_info), |
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GFP_KERNEL); |
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if (!info) |
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return -ENOMEM; |
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info->chip = chip; |
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info->i2c = (chip->id == CHIP_PM8607) ? chip->client : chip->companion; |
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info->dev = &pdev->dev; |
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info->irq = irq; |
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info->idev = devm_input_allocate_device(&pdev->dev); |
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if (!info->idev) { |
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dev_err(chip->dev, "Failed to allocate input dev\n"); |
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return -ENOMEM; |
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} |
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info->idev->name = "88pm860x_on"; |
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info->idev->phys = "88pm860x_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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info->idev->keybit[BIT_WORD(KEY_POWER)] = BIT_MASK(KEY_POWER); |
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ret = input_register_device(info->idev); |
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if (ret) { |
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dev_err(chip->dev, "Can't register input device: %d\n", ret); |
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return ret; |
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} |
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ret = devm_request_threaded_irq(&pdev->dev, info->irq, NULL, |
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pm860x_onkey_handler, IRQF_ONESHOT, |
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"onkey", info); |
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if (ret < 0) { |
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dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n", |
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info->irq, ret); |
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return ret; |
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} |
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platform_set_drvdata(pdev, info); |
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device_init_wakeup(&pdev->dev, 1); |
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return 0; |
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} |
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static int __maybe_unused pm860x_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 pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent); |
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if (device_may_wakeup(dev)) |
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chip->wakeup_flag |= 1 << PM8607_IRQ_ONKEY; |
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return 0; |
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} |
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static int __maybe_unused pm860x_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 pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent); |
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if (device_may_wakeup(dev)) |
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chip->wakeup_flag &= ~(1 << PM8607_IRQ_ONKEY); |
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return 0; |
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} |
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static SIMPLE_DEV_PM_OPS(pm860x_onkey_pm_ops, pm860x_onkey_suspend, pm860x_onkey_resume); |
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static struct platform_driver pm860x_onkey_driver = { |
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.driver = { |
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.name = "88pm860x-onkey", |
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.pm = &pm860x_onkey_pm_ops, |
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}, |
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.probe = pm860x_onkey_probe, |
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}; |
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module_platform_driver(pm860x_onkey_driver); |
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MODULE_DESCRIPTION("Marvell 88PM860x ONKEY driver"); |
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MODULE_AUTHOR("Haojian Zhuang <[email protected]>"); |
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MODULE_LICENSE("GPL");
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