Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / input / misc / 88pm80x_onkey.c

diff --git a/kernel/drivers/input/misc/88pm80x_onkey.c b/kernel/drivers/input/misc/88pm80x_onkey.c
new file mode 100644 (file)
index 0000000..cf9908f
--- /dev/null
+++ b/kernel/drivers/input/misc/88pm80x_onkey.c
@@ -0,0 +1,167 @@
+/*
+ * 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 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 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",
+                  .pm = &pm80x_onkey_pm_ops,
+                  },
+       .probe = pm80x_onkey_probe,
+       .remove = 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");