add onkey support to MARVELL 88PM80X PMIC.

Signed-off-by: Qiao Zhou <zhouq...@marvell.com>
---
 drivers/input/misc/88pm80x_onkey.c |  190 ++++++++++++++++++++++++++++++++++++
 drivers/input/misc/Kconfig         |   10 ++
 drivers/input/misc/Makefile        |    1 +
 3 files changed, 201 insertions(+), 0 deletions(-)
 create mode 100644 drivers/input/misc/88pm80x_onkey.c

diff --git a/drivers/input/misc/88pm80x_onkey.c 
b/drivers/input/misc/88pm80x_onkey.c
new file mode 100644
index 0000000..b202448
--- /dev/null
+++ b/drivers/input/misc/88pm80x_onkey.c
@@ -0,0 +1,190 @@
+/*
+ * 88pm80x_onkey.c - Marvell 88PM80x ONKEY driver
+ *
+ * Copyright (C) 2012 Marvell International Ltd.
+ * Haojian Zhuang <haojian.zhu...@marvell.com>
+ * Qiao Zhou <zhouq...@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/input.h>
+#include <linux/interrupt.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;
+
+       regmap_read(info->map, PM800_STATUS_1, &ret);
+       ret &= PM800_ONKEY_STS1;
+
+       input_report_key(info->idev, KEY_POWER, ret);
+       input_sync(info->idev);
+
+       return IRQ_HANDLED;
+}
+
+#ifdef CONFIG_PM
+static int pm80x_onkey_suspend(struct device *dev)
+{
+       struct platform_device *pdev = to_platform_device(dev);
+       struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent);
+
+       if (device_may_wakeup(dev))
+               chip->wu_flag |= (1 << PM800_IRQ_ONKEY);
+
+       return 0;
+}
+
+static int pm80x_onkey_resume(struct device *dev)
+{
+       struct platform_device *pdev = to_platform_device(dev);
+       struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent);
+
+       if (device_may_wakeup(dev))
+               chip->wu_flag &= ~(1 << PM800_IRQ_ONKEY);
+
+       return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(pm80x_onkey_pm_ops, pm80x_onkey_suspend,
+                        pm80x_onkey_resume);
+
+static int __devinit pm80x_onkey_probe(struct platform_device *pdev)
+{
+
+       void *chip = dev_get_drvdata(pdev->dev.parent);
+       struct pm80x_onkey_info *info;
+       int ret;
+
+       info =
+           devm_kzalloc(&pdev->dev, sizeof(struct pm80x_onkey_info),
+                        GFP_KERNEL);
+       if (!info)
+               return -ENOMEM;
+
+       info->pm80x = (struct pm80x_chip *)chip;
+
+       info->irq = platform_get_irq(pdev, 0);
+       if (info->irq < 0) {
+               dev_err(&pdev->dev, "No IRQ resource!\n");
+               return -EINVAL;
+       }
+
+       info->map = info->pm80x->regmap;
+       if (!info->map) {
+               dev_err(&pdev->dev, "no regmap!\n");
+               ret = -EINVAL;
+               goto out;
+       }
+
+       info->idev = input_allocate_device();
+       if (!info->idev) {
+               dev_err(&pdev->dev, "Failed to allocate input dev\n");
+               ret = -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);
+       info->idev->keybit[BIT_WORD(KEY_POWER)] = BIT_MASK(KEY_POWER);
+
+       ret = input_register_device(info->idev);
+       if (ret) {
+               dev_err(&pdev->dev, "Can't register input device: %d\n", ret);
+               goto out_reg;
+       }
+
+       ret = pm80x_request_irq(info->pm80x, info->irq, pm80x_onkey_handler,
+                                           IRQF_ONESHOT, "onkey", info);
+       if (ret < 0) {
+               dev_err(&pdev->dev, "Failed to request IRQ: #%d: %d\n",
+                       info->irq, ret);
+               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:
+       input_unregister_device(info->idev);
+out_reg:
+       input_free_device(info->idev);
+out:
+       devm_kfree(&pdev->dev, info);
+       return ret;
+}
+
+static int __devexit pm80x_onkey_remove(struct platform_device *pdev)
+{
+       struct pm80x_onkey_info *info = platform_get_drvdata(pdev);
+
+       pm80x_free_irq(info->pm80x, info->irq, info);
+       input_unregister_device(info->idev);
+       input_free_device(info->idev);
+       devm_kfree(&pdev->dev, 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 <zhouq...@marvell.com>");
+MODULE_ALIAS("platform:88pm80x-onkey");
diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index 7faf4a7..8205a66 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -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_88PM80X
+       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
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index f55cdf4..83fe6f5 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -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
-- 
1.7.0.4

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