3 files changed, 182 insertions, 0 deletions

diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index a7719a22d17e..c8353570344c 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -483,6 +483,16 @@ config INPUT_DA9052_ONKEY
           To compile this driver as a module, choose M here: the
           module will be called da9052_onkey.
 
+config INPUT_DA9055_ONKEY
+        tristate "Dialog Semiconductor DA9055 ONKEY"
+        depends on MFD_DA9055
+        help
+          Support the ONKEY of DA9055 PMICs as an input device
+          reporting power button status.
+
+          To compile this driver as a module, choose M here: the module
+          will be called da9055_onkey.
+
 config INPUT_DM355EVM
         tristate "TI DaVinci DM355 EVM Keypad and IR Remote"
         depends on MFD_DM355EVM_MSP
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index 83fe6f5b77d1..23347e3f7e96 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -23,6 +23,7 @@ obj-$(CONFIG_INPUT_CMA3000)		+= cma3000_d0x.o
 obj-$(CONFIG_INPUT_CMA3000_I2C)         += cma3000_d0x_i2c.o
 obj-$(CONFIG_INPUT_COBALT_BTNS)         += cobalt_btns.o
 obj-$(CONFIG_INPUT_DA9052_ONKEY)        += da9052_onkey.o
+obj-$(CONFIG_INPUT_DA9055_ONKEY)        += da9055_onkey.o
 obj-$(CONFIG_INPUT_DM355EVM)            += dm355evm_keys.o
 obj-$(CONFIG_INPUT_GP2A)                += gp2ap002a00f.o
 obj-$(CONFIG_INPUT_GPIO_TILT_POLLED)    += gpio_tilt_polled.o
diff --git a/drivers/input/misc/da9055_onkey.c b/drivers/input/misc/da9055_onkey.c
new file mode 100644
index 000000000000..10ebf15070d7
--- /dev/null
+++ b/drivers/input/misc/da9055_onkey.c
@@ -0,0 +1,171 @@
+/*
+ * ON pin driver for Dialog DA9055 PMICs
+ *
+ * Copyright(c) 2012 Dialog Semiconductor Ltd.
+ *
+ * Author: David Dajun Chen <dchen@diasemi.com>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <linux/mfd/da9055/core.h>
+#include <linux/mfd/da9055/reg.h>
+
+struct da9055_onkey {
+        struct da9055 *da9055;
+        struct input_dev *input;
+        struct delayed_work work;
+};
+
+static void da9055_onkey_query(struct da9055_onkey *onkey)
+{
+        int key_stat;
+
+        key_stat = da9055_reg_read(onkey->da9055, DA9055_REG_STATUS_A);
+        if (key_stat < 0) {
+                dev_err(onkey->da9055->dev,
+                        "Failed to read onkey event %d\n", key_stat);
+        } else {
+                key_stat &= DA9055_NOKEY_STS;
+                /*
+                 * Onkey status bit is cleared when onkey button is relased.
+                 */
+                if (!key_stat) {
+                        input_report_key(onkey->input, KEY_POWER, 0);
+                        input_sync(onkey->input);
+                }
+        }
+
+        /*
+         * Interrupt is generated only when the ONKEY pin is asserted.
+         * Hence the deassertion of the pin is simulated through work queue.
+         */
+        if (key_stat)
+                schedule_delayed_work(&onkey->work, msecs_to_jiffies(10));
+
+}
+
+static void da9055_onkey_work(struct work_struct *work)
+{
+        struct da9055_onkey *onkey = container_of(work, struct da9055_onkey,
+                                                  work.work);
+
+        da9055_onkey_query(onkey);
+}
+
+static irqreturn_t da9055_onkey_irq(int irq, void *data)
+{
+        struct da9055_onkey *onkey = data;
+
+        input_report_key(onkey->input, KEY_POWER, 1);
+        input_sync(onkey->input);
+
+        da9055_onkey_query(onkey);
+
+        return IRQ_HANDLED;
+}
+
+static int __devinit da9055_onkey_probe(struct platform_device *pdev)
+{
+        struct da9055 *da9055 = dev_get_drvdata(pdev->dev.parent);
+        struct da9055_onkey *onkey;
+        struct input_dev *input_dev;
+        int irq, err;
+
+        irq = platform_get_irq_byname(pdev, "ONKEY");
+        if (irq < 0) {
+                dev_err(&pdev->dev,
+                        "Failed to get an IRQ for input device, %d\n", irq);
+                return -EINVAL;
+        }
+
+        onkey = devm_kzalloc(&pdev->dev, sizeof(*onkey), GFP_KERNEL);
+        if (!onkey) {
+                dev_err(&pdev->dev, "Failed to allocate memory\n");
+                return -ENOMEM;
+        }
+
+        input_dev = input_allocate_device();
+        if (!input_dev) {
+                dev_err(&pdev->dev, "Failed to allocate memory\n");
+                return -ENOMEM;
+        }
+
+        onkey->input = input_dev;
+        onkey->da9055 = da9055;
+        input_dev->name = "da9055-onkey";
+        input_dev->phys = "da9055-onkey/input0";
+        input_dev->dev.parent = &pdev->dev;
+
+        input_dev->evbit[0] = BIT_MASK(EV_KEY);
+        __set_bit(KEY_POWER, input_dev->keybit);
+
+        INIT_DELAYED_WORK(&onkey->work, da9055_onkey_work);
+
+        irq = regmap_irq_get_virq(da9055->irq_data, irq);
+        err = request_threaded_irq(irq, NULL, da9055_onkey_irq,
+                                   IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
+                                   "ONKEY", onkey);
+        if (err < 0) {
+                dev_err(&pdev->dev,
+                        "Failed to register ONKEY IRQ %d, error = %d\n",
+                        irq, err);
+                goto err_free_input;
+        }
+
+        err = input_register_device(input_dev);
+        if (err) {
+                dev_err(&pdev->dev, "Unable to register input device, %d\n",
+                        err);
+                goto err_free_irq;
+        }
+
+        platform_set_drvdata(pdev, onkey);
+
+        return 0;
+
+err_free_irq:
+        free_irq(irq, onkey);
+        cancel_delayed_work_sync(&onkey->work);
+err_free_input:
+        input_free_device(input_dev);
+
+        return err;
+}
+
+static int __devexit da9055_onkey_remove(struct platform_device *pdev)
+{
+        struct da9055_onkey *onkey = platform_get_drvdata(pdev);
+        int irq = platform_get_irq_byname(pdev, "ONKEY");
+
+        irq = regmap_irq_get_virq(onkey->da9055->irq_data, irq);
+        free_irq(irq, onkey);
+        cancel_delayed_work_sync(&onkey->work);
+        input_unregister_device(onkey->input);
+
+        return 0;
+}
+
+static struct platform_driver da9055_onkey_driver = {
+        .probe  = da9055_onkey_probe,
+        .remove = __devexit_p(da9055_onkey_remove),
+        .driver = {
+                .name   = "da9055-onkey",
+                .owner  = THIS_MODULE,
+        },
+};
+
+module_platform_driver(da9055_onkey_driver);
+
+MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
+MODULE_DESCRIPTION("Onkey driver for DA9055");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:da9055-onkey");