/* 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/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 __devinit 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 __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), }; 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");