input: PCF50633 input driver

Signed-off-by: Balaji Rao <balajirrao@openmoko.org>
Cc: Andy Green <andy@openmoko.com>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@openedhand.com>

3 files changed, 140 insertions, 0 deletions

diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index 199055db5082..67e5553f699a 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -220,4 +220,11 @@ config HP_SDC_RTC
           Say Y here if you want to support the built-in real time clock
           of the HP SDC controller.
 
+config INPUT_PCF50633_PMU
+        tristate "PCF50633 PMU events"
+        depends on MFD_PCF50633
+        help
+         Say Y to include support for delivering  PMU events via  input
+         layer on NXP PCF50633.
+
 endif
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index d7db2aeb8a98..bb62e6efacf3 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -21,3 +21,4 @@ obj-$(CONFIG_HP_SDC_RTC)		+= hp_sdc_rtc.o
 obj-$(CONFIG_INPUT_UINPUT)              += uinput.o
 obj-$(CONFIG_INPUT_APANEL)              += apanel.o
 obj-$(CONFIG_INPUT_SGI_BTNS)            += sgi_btns.o
+obj-$(CONFIG_INPUT_PCF50633_PMU)        += pcf50633-input.o
diff --git a/drivers/input/misc/pcf50633-input.c b/drivers/input/misc/pcf50633-input.c
new file mode 100644
index 000000000000..039dcb00ebd9
--- /dev/null
+++ b/drivers/input/misc/pcf50633-input.c
@@ -0,0 +1,132 @@
+/* NXP PCF50633 Input Driver
+ *
+ * (C) 2006-2008 by Openmoko, Inc.
+ * Author: Balaji Rao <balajirrao@openmoko.org>
+ * All rights reserved.
+ *
+ * Broken down from monstrous PCF50633 driver mainly by
+ * Harald Welte, Andy Green and Werner Almesberger
+ *
+ *  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/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/input.h>
+
+#include <linux/mfd/pcf50633/core.h>
+
+#define PCF50633_OOCSTAT_ONKEY  0x01
+#define PCF50633_REG_OOCSTAT    0x12
+#define PCF50633_REG_OOCMODE    0x10
+
+struct pcf50633_input {
+        struct pcf50633 *pcf;
+        struct input_dev *input_dev;
+};
+
+static void
+pcf50633_input_irq(int irq, void *data)
+{
+        struct pcf50633_input *input;
+        int onkey_released;
+
+        input = data;
+
+        /* We report only one event depending on the key press status */
+        onkey_released = pcf50633_reg_read(input->pcf, PCF50633_REG_OOCSTAT)
+                                                & PCF50633_OOCSTAT_ONKEY;
+
+        if (irq == PCF50633_IRQ_ONKEYF && !onkey_released)
+                input_report_key(input->input_dev, KEY_POWER, 1);
+        else if (irq == PCF50633_IRQ_ONKEYR && onkey_released)
+                input_report_key(input->input_dev, KEY_POWER, 0);
+
+        input_sync(input->input_dev);
+}
+
+static int __devinit pcf50633_input_probe(struct platform_device *pdev)
+{
+        struct pcf50633_input *input;
+        struct pcf50633_subdev_pdata *pdata = pdev->dev.platform_data;
+        struct input_dev *input_dev;
+        int ret;
+
+
+        input = kzalloc(sizeof(*input), GFP_KERNEL);
+        if (!input)
+                return -ENOMEM;
+
+        input_dev = input_allocate_device();
+        if (!input_dev) {
+                kfree(input);
+                return -ENOMEM;
+        }
+
+        platform_set_drvdata(pdev, input);
+        input->pcf = pdata->pcf;
+        input->input_dev = input_dev;
+
+        input_dev->name = "PCF50633 PMU events";
+        input_dev->id.bustype = BUS_I2C;
+        input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_PWR);
+        set_bit(KEY_POWER, input_dev->keybit);
+
+        ret = input_register_device(input_dev);
+        if (ret) {
+                input_free_device(input_dev);
+                kfree(input);
+                return ret;
+        }
+        pcf50633_register_irq(pdata->pcf, PCF50633_IRQ_ONKEYR,
+                                pcf50633_input_irq, input);
+        pcf50633_register_irq(pdata->pcf, PCF50633_IRQ_ONKEYF,
+                                pcf50633_input_irq, input);
+
+        return 0;
+}
+
+static int __devexit pcf50633_input_remove(struct platform_device *pdev)
+{
+        struct pcf50633_input *input  = platform_get_drvdata(pdev);
+
+        pcf50633_free_irq(input->pcf, PCF50633_IRQ_ONKEYR);
+        pcf50633_free_irq(input->pcf, PCF50633_IRQ_ONKEYF);
+
+        input_unregister_device(input->input_dev);
+        kfree(input);
+
+        return 0;
+}
+
+static struct platform_driver pcf50633_input_driver = {
+        .driver = {
+                .name = "pcf50633-input",
+        },
+        .probe = pcf50633_input_probe,
+        .remove = __devexit_p(pcf50633_input_remove),
+};
+
+static int __init pcf50633_input_init(void)
+{
+        return platform_driver_register(&pcf50633_input_driver);
+}
+module_init(pcf50633_input_init);
+
+static void __exit pcf50633_input_exit(void)
+{
+        platform_driver_unregister(&pcf50633_input_driver);
+}
+module_exit(pcf50633_input_exit);
+
+MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
+MODULE_DESCRIPTION("PCF50633 input driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:pcf50633-input");