diff options
Diffstat (limited to 'drivers/input/misc/pcf50606-input.c')
| -rw-r--r-- | drivers/input/misc/pcf50606-input.c | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/drivers/input/misc/pcf50606-input.c b/drivers/input/misc/pcf50606-input.c new file mode 100644 index 00000000000..da78fb92fbc --- /dev/null +++ b/drivers/input/misc/pcf50606-input.c @@ -0,0 +1,138 @@ +/* Philips PCF50606 Input Driver + * + * (C) 2006-2008 by Openmoko, Inc. + * Author: Balaji Rao <balajirrao@openmoko.org> + * All rights reserved. + * + * Broken down from monstrous PCF50606 driver mainly by + * Harald Welte, Matt Hsu, 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/pcf50606/core.h> + +#define PCF50606_OOCS_ONKEY 0x01 +#define PCF50606_OOCS_EXTON 0x02 + +#define PCF50606_OOCC2_ONKEYDB_NONE 0x00 +#define PCF50606_OOCC2_ONKEYDB_14ms 0x01 +#define PCF50606_OOCC2_ONKEYDB_62ms 0x02 +#define PCF50606_OOCC2_ONKEYDB_500ms 0x03 +#define PCF50606_OOCC2_EXTONDB_NONE 0x00 +#define PCF50606_OOCC2_EXTONDB_14ms 0x04 +#define PCF50606_OOCC2_EXTONDB_62ms 0x08 +#define PCF50606_OOCC2_EXTONDB_500ms 0x0c + +#define PCF50606_REG_OOCS 0x01 + +struct pcf50606_input { + struct pcf50606 *pcf; + struct input_dev *input_dev; +}; + +static void +pcf50606_input_irq(int irq, void *data) +{ + struct pcf50606_input *input; + int onkey_released; + + input = data; + onkey_released = pcf50606_reg_read(input->pcf, PCF50606_REG_OOCS) & + PCF50606_OOCS_ONKEY; + + if (irq == PCF50606_IRQ_ONKEYF && !onkey_released) + input_report_key(input->input_dev, KEY_POWER, 1); + else if (irq == PCF50606_IRQ_ONKEYR && onkey_released) + input_report_key(input->input_dev, KEY_POWER, 0); + + input_sync(input->input_dev); +} + +static int __devinit pcf50606_input_probe(struct platform_device *pdev) +{ + struct pcf50606_input *input; + 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 = dev_to_pcf50606(pdev->dev.parent); + input->input_dev = input_dev; + + input_dev->name = "PCF50606 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; + } + pcf50606_register_irq(input->pcf, PCF50606_IRQ_ONKEYR, + pcf50606_input_irq, input); + pcf50606_register_irq(input->pcf, PCF50606_IRQ_ONKEYF, + pcf50606_input_irq, input); + + return 0; +} + +static int __devexit pcf50606_input_remove(struct platform_device *pdev) +{ + struct pcf50606_input *input = platform_get_drvdata(pdev); + + input_unregister_device(input->input_dev); + pcf50606_free_irq(input->pcf, PCF50606_IRQ_ONKEYR); + pcf50606_free_irq(input->pcf, PCF50606_IRQ_ONKEYF); + + kfree(input); + + return 0; +} + +static struct platform_driver pcf50606_input_driver = { + .driver = { + .name = "pcf50606-input", + }, + .probe = pcf50606_input_probe, + .remove = __devexit_p(pcf50606_input_remove), +}; + +static int __init pcf50606_input_init(void) +{ + return platform_driver_register(&pcf50606_input_driver); +} +module_init(pcf50606_input_init); + +static void __exit pcf50606_input_exit(void) +{ + platform_driver_unregister(&pcf50606_input_driver); +} +module_exit(pcf50606_input_exit); + +MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>"); +MODULE_DESCRIPTION("PCF50606 input driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:pcf50606-input"); |