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>

diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index 199055db5082e8020834e8883e3d502d7319bfb8..67e5553f699a1053224b233e1f2fb85b778471ec 100644 (file)
--- 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 d7db2aeb8a982e82fe712ed17c3f663c62a2fc35..bb62e6efacf3476d78c66fd0c9a575c465f2a99a 100644 (file)
--- 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 (file)
index 0000000..039dcb0
--- /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");