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165 lines
4.2 KiB
165 lines
4.2 KiB
/* |
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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 <[email protected]> |
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* Qiao Zhou <[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/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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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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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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.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 <[email protected]>"); |
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MODULE_ALIAS("platform:88pm80x-onkey");
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