diff options
Diffstat (limited to 'drivers/input/misc/pcf50633-input.c')
| -rw-r--r-- | drivers/input/misc/pcf50633-input.c | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/drivers/input/misc/pcf50633-input.c b/drivers/input/misc/pcf50633-input.c new file mode 100644 index 000000000..db92f4f3c --- /dev/null +++ b/drivers/input/misc/pcf50633-input.c @@ -0,0 +1,120 @@ +/* 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/device.h> +#include <linux/platform_device.h> +#include <linux/input.h> +#include <linux/slab.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 pcf50633_input_probe(struct platform_device *pdev) +{ + struct pcf50633_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_pcf50633(pdev->dev.parent); + 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(input->pcf, PCF50633_IRQ_ONKEYR, + pcf50633_input_irq, input); + pcf50633_register_irq(input->pcf, PCF50633_IRQ_ONKEYF, + pcf50633_input_irq, input); + + return 0; +} + +static int 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 = pcf50633_input_remove, +}; +module_platform_driver(pcf50633_input_driver); + +MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>"); +MODULE_DESCRIPTION("PCF50633 input driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:pcf50633-input"); |