// SPDX-License-Identifier: GPL-2.0-or-later
|
/* 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
|
*/
|
|
#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");
|
