Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / input / misc / 88pm860x_onkey.c

diff --git a/kernel/drivers/input/misc/88pm860x_onkey.c b/kernel/drivers/input/misc/88pm860x_onkey.c
new file mode 100644 (file)
index 0000000..cc87443
--- /dev/null
+++ b/kernel/drivers/input/misc/88pm860x_onkey.c
@@ -0,0 +1,147 @@
+/*
+ * 88pm860x_onkey.c - Marvell 88PM860x ONKEY driver
+ *
+ * Copyright (C) 2009-2010 Marvell International Ltd.
+ *      Haojian Zhuang <haojian.zhuang@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/platform_device.h>
+#include <linux/i2c.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/88pm860x.h>
+#include <linux/slab.h>
+#include <linux/device.h>
+
+#define PM8607_WAKEUP          0x0b
+
+#define LONG_ONKEY_EN          (1 << 1)
+#define ONKEY_STATUS           (1 << 0)
+
+struct pm860x_onkey_info {
+       struct input_dev        *idev;
+       struct pm860x_chip      *chip;
+       struct i2c_client       *i2c;
+       struct device           *dev;
+       int                     irq;
+};
+
+/* 88PM860x gives us an interrupt when ONKEY is held */
+static irqreturn_t pm860x_onkey_handler(int irq, void *data)
+{
+       struct pm860x_onkey_info *info = data;
+       int ret;
+
+       ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
+       ret &= ONKEY_STATUS;
+       input_report_key(info->idev, KEY_POWER, ret);
+       input_sync(info->idev);
+
+       /* Enable 8-second long onkey detection */
+       pm860x_set_bits(info->i2c, PM8607_WAKEUP, 3, LONG_ONKEY_EN);
+       return IRQ_HANDLED;
+}
+
+static int pm860x_onkey_probe(struct platform_device *pdev)
+{
+       struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
+       struct pm860x_onkey_info *info;
+       int irq, ret;
+
+       irq = platform_get_irq(pdev, 0);
+       if (irq < 0) {
+               dev_err(&pdev->dev, "No IRQ resource!\n");
+               return -EINVAL;
+       }
+
+       info = devm_kzalloc(&pdev->dev, sizeof(struct pm860x_onkey_info),
+                           GFP_KERNEL);
+       if (!info)
+               return -ENOMEM;
+       info->chip = chip;
+       info->i2c = (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
+       info->dev = &pdev->dev;
+       info->irq = irq;
+
+       info->idev = devm_input_allocate_device(&pdev->dev);
+       if (!info->idev) {
+               dev_err(chip->dev, "Failed to allocate input dev\n");
+               return -ENOMEM;
+       }
+
+       info->idev->name = "88pm860x_on";
+       info->idev->phys = "88pm860x_on/input0";
+       info->idev->id.bustype = BUS_I2C;
+       info->idev->dev.parent = &pdev->dev;
+       info->idev->evbit[0] = BIT_MASK(EV_KEY);
+       info->idev->keybit[BIT_WORD(KEY_POWER)] = BIT_MASK(KEY_POWER);
+
+       ret = input_register_device(info->idev);
+       if (ret) {
+               dev_err(chip->dev, "Can't register input device: %d\n", ret);
+               return ret;
+       }
+
+       ret = devm_request_threaded_irq(&pdev->dev, info->irq, NULL,
+                                       pm860x_onkey_handler, IRQF_ONESHOT,
+                                       "onkey", info);
+       if (ret < 0) {
+               dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
+                       info->irq, ret);
+               return ret;
+       }
+
+       platform_set_drvdata(pdev, info);
+       device_init_wakeup(&pdev->dev, 1);
+
+       return 0;
+}
+
+static int __maybe_unused pm860x_onkey_suspend(struct device *dev)
+{
+       struct platform_device *pdev = to_platform_device(dev);
+       struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
+
+       if (device_may_wakeup(dev))
+               chip->wakeup_flag |= 1 << PM8607_IRQ_ONKEY;
+       return 0;
+}
+static int __maybe_unused pm860x_onkey_resume(struct device *dev)
+{
+       struct platform_device *pdev = to_platform_device(dev);
+       struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
+
+       if (device_may_wakeup(dev))
+               chip->wakeup_flag &= ~(1 << PM8607_IRQ_ONKEY);
+       return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(pm860x_onkey_pm_ops, pm860x_onkey_suspend, pm860x_onkey_resume);
+
+static struct platform_driver pm860x_onkey_driver = {
+       .driver         = {
+               .name   = "88pm860x-onkey",
+               .pm     = &pm860x_onkey_pm_ops,
+       },
+       .probe          = pm860x_onkey_probe,
+};
+module_platform_driver(pm860x_onkey_driver);
+
+MODULE_DESCRIPTION("Marvell 88PM860x ONKEY driver");
+MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
+MODULE_LICENSE("GPL");