/*
* Hisilicon PMIC powerkey driver
*
* Copyright ( C ) 2013 Hisilicon Ltd .
* Copyright ( C ) 2015 , 2016 Linaro Ltd .
*
* This file is subject to the terms and conditions of the GNU General
* Public License . See the file " COPYING " in the main directory of this
* archive for more details .
*
* This program is distributed in the hope that it will be useful ,
* but WITHOUT ANY WARRANTY ; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE . See the
* GNU General Public License for more details .
*/
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/reboot.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_irq.h>
#include <linux/input.h>
#include <linux/slab.h>
/* the held interrupt will trigger after 4 seconds */
#define MAX_HELD_TIME (4 * MSEC_PER_SEC)
static irqreturn_t hi65xx_power_press_isr(int irq, void *q)
{
struct input_dev *input = q;
pm_wakeup_dev_event(input->dev.parent, MAX_HELD_TIME, true );
input_report_key(input, KEY_POWER, 1 );
input_sync(input);
return IRQ_HANDLED;
}
static irqreturn_t hi65xx_power_release_isr(int irq, void *q)
{
struct input_dev *input = q;
pm_wakeup_event(input->dev.parent, MAX_HELD_TIME);
input_report_key(input, KEY_POWER, 0 );
input_sync(input);
return IRQ_HANDLED;
}
static irqreturn_t hi65xx_restart_toggle_isr(int irq, void *q)
{
struct input_dev *input = q;
int value = test_bit(KEY_RESTART, input->key);
pm_wakeup_event(input->dev.parent, MAX_HELD_TIME);
input_report_key(input, KEY_RESTART, !value);
input_sync(input);
return IRQ_HANDLED;
}
static const struct {
const char *name;
irqreturn_t (*handler)(int irq, void *q);
} hi65xx_irq_info[] = {
{ "down" , hi65xx_power_press_isr },
{ "up" , hi65xx_power_release_isr },
{ "hold 4s" , hi65xx_restart_toggle_isr },
};
static int hi65xx_powerkey_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct input_dev *input;
int irq, i, error;
input = devm_input_allocate_device(dev);
if (!input) {
dev_err(dev, "failed to allocate input device\n" );
return -ENOMEM;
}
input->phys = "hisi_on/input0" ;
input->name = "HISI 65xx PowerOn Key" ;
input_set_capability(input, EV_KEY, KEY_POWER);
input_set_capability(input, EV_KEY, KEY_RESTART);
for (i = 0 ; i < ARRAY_SIZE(hi65xx_irq_info); i++) {
irq = platform_get_irq_byname(pdev, hi65xx_irq_info[i].name);
if (irq < 0 )
return irq;
error = devm_request_any_context_irq(dev, irq,
hi65xx_irq_info[i].handler,
IRQF_ONESHOT,
hi65xx_irq_info[i].name,
input);
if (error < 0 ) {
dev_err(dev, "couldn't request irq %s: %d\n" ,
hi65xx_irq_info[i].name, error);
return error;
}
}
error = input_register_device(input);
if (error) {
dev_err(dev, "failed to register input device: %d\n" , error);
return error;
}
device_init_wakeup(dev, 1 );
return 0 ;
}
static struct platform_driver hi65xx_powerkey_driver = {
.driver = {
.name = "hi65xx-powerkey" ,
},
.probe = hi65xx_powerkey_probe,
};
module_platform_driver(hi65xx_powerkey_driver);
MODULE_AUTHOR("Zhiliang Xue <xuezhiliang@huawei.com" );
MODULE_DESCRIPTION("Hisi PMIC Power key driver" );
MODULE_LICENSE("GPL v2" );
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¤ Dauer der Verarbeitung: 0.9 Sekunden
(vorverarbeitet am 2026-10-01)
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