input: Add onkey support for 88PM80X PMIC (96c905f4) · Commits · e / devices / android_kernel_teracube_2e

drivers/input/misc/88pm80x_onkey.c

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		/*
		* Marvell 88PM80x ONKEY driver
		*
		* Copyright (C) 2012 Marvell International Ltd.
		* Haojian Zhuang <haojian.zhuang@marvell.com>
		* Qiao Zhou <zhouqiao@marvell.com>
		*
		* This file is subject to the terms and conditions of the GNU General
		* Public License. See the file "COPYING" in the main directory of this
		* archive for more details.
		*
		* 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.
		*
		* You should have received a copy of the GNU General Public License
		* along with this program; if not, write to the Free Software
		* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
		*/

		#include <linux/kernel.h>
		#include <linux/module.h>
		#include <linux/input.h>
		#include <linux/mfd/88pm80x.h>
		#include <linux/regmap.h>
		#include <linux/slab.h>

		#define PM800_LONG_ONKEY_EN (1 << 0)
		#define PM800_LONG_KEY_DELAY (8) /* 1 .. 16 seconds */
		#define PM800_LONKEY_PRESS_TIME ((PM800_LONG_KEY_DELAY-1) << 4)
		#define PM800_LONKEY_PRESS_TIME_MASK (0xF0)
		#define PM800_SW_PDOWN (1 << 5)

		struct pm80x_onkey_info {
		struct input_dev *idev;
		struct pm80x_chip *pm80x;
		struct regmap *map;
		int irq;
		};

		/* 88PM80x gives us an interrupt when ONKEY is held */
		static irqreturn_t pm80x_onkey_handler(int irq, void *data)
		{
		struct pm80x_onkey_info *info = data;
		int ret = 0;
		unsigned int val;

		ret = regmap_read(info->map, PM800_STATUS_1, &val);
		if (ret < 0) {
		dev_err(info->idev->dev.parent, "failed to read status: %d\n", ret);
		return IRQ_NONE;
		}
		val &= PM800_ONKEY_STS1;

		input_report_key(info->idev, KEY_POWER, val);
		input_sync(info->idev);

		return IRQ_HANDLED;
		}

		static SIMPLE_DEV_PM_OPS(pm80x_onkey_pm_ops, pm80x_dev_suspend,
		pm80x_dev_resume);

		static int __devinit pm80x_onkey_probe(struct platform_device *pdev)
		{

		struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent);
		struct pm80x_onkey_info *info;
		int err;

		info = kzalloc(sizeof(struct pm80x_onkey_info), GFP_KERNEL);
		if (!info)
		return -ENOMEM;

		info->pm80x = chip;

		info->irq = platform_get_irq(pdev, 0);
		if (info->irq < 0) {
		dev_err(&pdev->dev, "No IRQ resource!\n");
		err = -EINVAL;
		goto out;
		}

		info->map = info->pm80x->regmap;
		if (!info->map) {
		dev_err(&pdev->dev, "no regmap!\n");
		err = -EINVAL;
		goto out;
		}

		info->idev = input_allocate_device();
		if (!info->idev) {
		dev_err(&pdev->dev, "Failed to allocate input dev\n");
		err = -ENOMEM;
		goto out;
		}

		info->idev->name = "88pm80x_on";
		info->idev->phys = "88pm80x_on/input0";
		info->idev->id.bustype = BUS_I2C;
		info->idev->dev.parent = &pdev->dev;
		info->idev->evbit[0] = BIT_MASK(EV_KEY);
		__set_bit(KEY_POWER, info->idev->keybit);

		err = pm80x_request_irq(info->pm80x, info->irq, pm80x_onkey_handler,
		IRQF_ONESHOT, "onkey", info);
		if (err < 0) {
		dev_err(&pdev->dev, "Failed to request IRQ: #%d: %d\n",
		info->irq, err);
		goto out_reg;
		}

		err = input_register_device(info->idev);
		if (err) {
		dev_err(&pdev->dev, "Can't register input device: %d\n", err);
		goto out_irq;
		}

		platform_set_drvdata(pdev, info);

		/* Enable long onkey detection */
		regmap_update_bits(info->map, PM800_RTC_MISC4, PM800_LONG_ONKEY_EN,
		PM800_LONG_ONKEY_EN);
		/* Set 8-second interval */
		regmap_update_bits(info->map, PM800_RTC_MISC3,
		PM800_LONKEY_PRESS_TIME_MASK,
		PM800_LONKEY_PRESS_TIME);

		device_init_wakeup(&pdev->dev, 1);
		return 0;

		out_irq:
		pm80x_free_irq(info->pm80x, info->irq, info);
		out_reg:
		input_free_device(info->idev);
		out:
		kfree(info);
		return err;
		}

		static int __devexit pm80x_onkey_remove(struct platform_device *pdev)
		{
		struct pm80x_onkey_info *info = platform_get_drvdata(pdev);

		device_init_wakeup(&pdev->dev, 0);
		pm80x_free_irq(info->pm80x, info->irq, info);
		input_unregister_device(info->idev);
		kfree(info);
		return 0;
		}

		static struct platform_driver pm80x_onkey_driver = {
		.driver = {
		.name = "88pm80x-onkey",
		.owner = THIS_MODULE,
		.pm = &pm80x_onkey_pm_ops,
		},
		.probe = pm80x_onkey_probe,
		.remove = __devexit_p(pm80x_onkey_remove),
		};

		module_platform_driver(pm80x_onkey_driver);

		MODULE_LICENSE("GPL");
		MODULE_DESCRIPTION("Marvell 88PM80x ONKEY driver");
		MODULE_AUTHOR("Qiao Zhou <zhouqiao@marvell.com>");
		MODULE_ALIAS("platform:88pm80x-onkey");

drivers/input/misc/Kconfig

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		@@ -22,6 +22,16 @@ config INPUT_88PM860X_ONKEY
		To compile this driver as a module, choose M here: the module
		will be called 88pm860x_onkey.

		config INPUT_88PM80X_ONKEY
		tristate "88PM80x ONKEY support"
		depends on MFD_88PM800
		help
		Support the ONKEY of Marvell 88PM80x PMICs as an input device
		reporting power button status.

		To compile this driver as a module, choose M here: the module
		will be called 88pm80x_onkey.

		config INPUT_AB8500_PONKEY
		tristate "AB8500 Pon (PowerOn) Key"
		depends on AB8500_CORE

drivers/input/misc/Makefile

+1 −0

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		@@ -5,6 +5,7 @@
		# Each configuration option enables a list of files.

		obj-$(CONFIG_INPUT_88PM860X_ONKEY) += 88pm860x_onkey.o
		obj-$(CONFIG_INPUT_88PM80X_ONKEY) += 88pm80x_onkey.o
		obj-$(CONFIG_INPUT_AB8500_PONKEY) += ab8500-ponkey.o
		obj-$(CONFIG_INPUT_AD714X) += ad714x.o
		obj-$(CONFIG_INPUT_AD714X_I2C) += ad714x-i2c.o