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2874c5fd28
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
115 lines
2.8 KiB
C
115 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/* NXP PCF50633 Input Driver
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*
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* (C) 2006-2008 by Openmoko, Inc.
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* Author: Balaji Rao <balajirrao@openmoko.org>
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* All rights reserved.
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*
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* Broken down from monstrous PCF50633 driver mainly by
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* Harald Welte, Andy Green and Werner Almesberger
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/platform_device.h>
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#include <linux/input.h>
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#include <linux/slab.h>
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#include <linux/mfd/pcf50633/core.h>
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#define PCF50633_OOCSTAT_ONKEY 0x01
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#define PCF50633_REG_OOCSTAT 0x12
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#define PCF50633_REG_OOCMODE 0x10
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struct pcf50633_input {
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struct pcf50633 *pcf;
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struct input_dev *input_dev;
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};
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static void
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pcf50633_input_irq(int irq, void *data)
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{
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struct pcf50633_input *input;
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int onkey_released;
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input = data;
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/* We report only one event depending on the key press status */
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onkey_released = pcf50633_reg_read(input->pcf, PCF50633_REG_OOCSTAT)
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& PCF50633_OOCSTAT_ONKEY;
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if (irq == PCF50633_IRQ_ONKEYF && !onkey_released)
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input_report_key(input->input_dev, KEY_POWER, 1);
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else if (irq == PCF50633_IRQ_ONKEYR && onkey_released)
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input_report_key(input->input_dev, KEY_POWER, 0);
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input_sync(input->input_dev);
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}
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static int pcf50633_input_probe(struct platform_device *pdev)
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{
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struct pcf50633_input *input;
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struct input_dev *input_dev;
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int ret;
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input = kzalloc(sizeof(*input), GFP_KERNEL);
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if (!input)
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return -ENOMEM;
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input_dev = input_allocate_device();
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if (!input_dev) {
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kfree(input);
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return -ENOMEM;
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}
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platform_set_drvdata(pdev, input);
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input->pcf = dev_to_pcf50633(pdev->dev.parent);
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input->input_dev = input_dev;
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input_dev->name = "PCF50633 PMU events";
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input_dev->id.bustype = BUS_I2C;
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input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_PWR);
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set_bit(KEY_POWER, input_dev->keybit);
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ret = input_register_device(input_dev);
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if (ret) {
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input_free_device(input_dev);
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kfree(input);
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return ret;
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}
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pcf50633_register_irq(input->pcf, PCF50633_IRQ_ONKEYR,
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pcf50633_input_irq, input);
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pcf50633_register_irq(input->pcf, PCF50633_IRQ_ONKEYF,
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pcf50633_input_irq, input);
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return 0;
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}
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static int pcf50633_input_remove(struct platform_device *pdev)
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{
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struct pcf50633_input *input = platform_get_drvdata(pdev);
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pcf50633_free_irq(input->pcf, PCF50633_IRQ_ONKEYR);
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pcf50633_free_irq(input->pcf, PCF50633_IRQ_ONKEYF);
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input_unregister_device(input->input_dev);
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kfree(input);
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return 0;
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}
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static struct platform_driver pcf50633_input_driver = {
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.driver = {
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.name = "pcf50633-input",
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},
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.probe = pcf50633_input_probe,
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.remove = pcf50633_input_remove,
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};
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module_platform_driver(pcf50633_input_driver);
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MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
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MODULE_DESCRIPTION("PCF50633 input driver");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:pcf50633-input");
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