forked from Minki/linux
245165de98
of_device_id is always used as const argument (See driver.of_match_table and open firmware functions). Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
127 lines
3.1 KiB
C
127 lines
3.1 KiB
C
/*
|
|
* Texas Instruments' TPS65218 Power Button Input Driver
|
|
*
|
|
* Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/
|
|
* Author: Felipe Balbi <balbi@ti.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
|
|
* kind, whether express or implied; without even the implied warranty
|
|
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/input.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/mfd/tps65218.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/slab.h>
|
|
|
|
struct tps65218_pwrbutton {
|
|
struct device *dev;
|
|
struct tps65218 *tps;
|
|
struct input_dev *idev;
|
|
};
|
|
|
|
static irqreturn_t tps65218_pwr_irq(int irq, void *_pwr)
|
|
{
|
|
struct tps65218_pwrbutton *pwr = _pwr;
|
|
unsigned int reg;
|
|
int error;
|
|
|
|
error = tps65218_reg_read(pwr->tps, TPS65218_REG_STATUS, ®);
|
|
if (error) {
|
|
dev_err(pwr->dev, "can't read register: %d\n", error);
|
|
goto out;
|
|
}
|
|
|
|
if (reg & TPS65218_STATUS_PB_STATE) {
|
|
input_report_key(pwr->idev, KEY_POWER, 1);
|
|
pm_wakeup_event(pwr->dev, 0);
|
|
} else {
|
|
input_report_key(pwr->idev, KEY_POWER, 0);
|
|
}
|
|
|
|
input_sync(pwr->idev);
|
|
|
|
out:
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int tps65218_pwron_probe(struct platform_device *pdev)
|
|
{
|
|
struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent);
|
|
struct device *dev = &pdev->dev;
|
|
struct tps65218_pwrbutton *pwr;
|
|
struct input_dev *idev;
|
|
int error;
|
|
int irq;
|
|
|
|
pwr = devm_kzalloc(dev, sizeof(*pwr), GFP_KERNEL);
|
|
if (!pwr)
|
|
return -ENOMEM;
|
|
|
|
idev = devm_input_allocate_device(dev);
|
|
if (!idev)
|
|
return -ENOMEM;
|
|
|
|
idev->name = "tps65218_pwrbutton";
|
|
idev->phys = "tps65218_pwrbutton/input0";
|
|
idev->dev.parent = dev;
|
|
idev->id.bustype = BUS_I2C;
|
|
|
|
input_set_capability(idev, EV_KEY, KEY_POWER);
|
|
|
|
pwr->tps = tps;
|
|
pwr->dev = dev;
|
|
pwr->idev = idev;
|
|
platform_set_drvdata(pdev, pwr);
|
|
device_init_wakeup(dev, true);
|
|
|
|
irq = platform_get_irq(pdev, 0);
|
|
error = devm_request_threaded_irq(dev, irq, NULL, tps65218_pwr_irq,
|
|
IRQF_TRIGGER_RISING |
|
|
IRQF_TRIGGER_FALLING |
|
|
IRQF_ONESHOT,
|
|
"tps65218-pwrbutton", pwr);
|
|
if (error) {
|
|
dev_err(dev, "failed to request IRQ #%d: %d\n",
|
|
irq, error);
|
|
return error;
|
|
}
|
|
|
|
error= input_register_device(idev);
|
|
if (error) {
|
|
dev_err(dev, "Can't register power button: %d\n", error);
|
|
return error;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id of_tps65218_pwr_match[] = {
|
|
{ .compatible = "ti,tps65218-pwrbutton" },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, of_tps65218_pwr_match);
|
|
|
|
static struct platform_driver tps65218_pwron_driver = {
|
|
.probe = tps65218_pwron_probe,
|
|
.driver = {
|
|
.name = "tps65218_pwrbutton",
|
|
.of_match_table = of_tps65218_pwr_match,
|
|
},
|
|
};
|
|
module_platform_driver(tps65218_pwron_driver);
|
|
|
|
MODULE_DESCRIPTION("TPS65218 Power Button");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
|