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/*
* hi6421_pwrkey.c - Hisilicon Hi6421 PMIC ONKEY driver
*
* Copyright (C) 2013 Hisilicon Ltd.
* Copyright (C) 2013 Linaro Ltd.
* Author: Haojian Zhuang <haojian.zhuang@linaro.org>
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_irq.h>
#include <linux/platform_device.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/mfd/hi6421-pmic.h>
struct hi6421_onkey_info {
struct input_dev *idev;
int irq[4];
};
static irqreturn_t hi6421_onkey_handler(int irq, void *data)
{
struct hi6421_onkey_info *info = (struct hi6421_onkey_info *)data;
/* only handle power down & power up event at here */
if (irq == info->irq[0]) {
input_report_key(info->idev, KEY_POWER, 1);
input_sync(info->idev);
} else if (irq == info->irq[1]) {
input_report_key(info->idev, KEY_POWER, 0);
input_sync(info->idev);
}
return IRQ_HANDLED;
}
static int hi6421_onkey_probe(struct platform_device *pdev)
{
struct hi6421_onkey_info *info;
struct device *dev = &pdev->dev;
int ret;
info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
if (!info)
return -ENOMEM;
info->irq[0] = platform_get_irq_byname(pdev, "down");
if (info->irq[0] < 0)
return -ENOENT;
ret = request_irq(info->irq[0], hi6421_onkey_handler,
IRQF_DISABLED, "down", info);
if (ret < 0)
return ret;
info->irq[1] = platform_get_irq_byname(pdev, "up");
if (info->irq[1] < 0) {
ret = -ENOENT;
goto err;
}
ret = request_irq(info->irq[1], hi6421_onkey_handler,
IRQF_DISABLED, "up", info);
if (ret < 0)
goto err;
info->irq[2] = platform_get_irq_byname(pdev, "hold 1s");
if (info->irq[2] < 0) {
ret = -ENOENT;
goto err_irq2;
}
ret = request_irq(info->irq[2], hi6421_onkey_handler,
IRQF_DISABLED, "hold 1s", info);
if (ret < 0)
goto err_irq2;
info->irq[3] = platform_get_irq_byname(pdev, "hold 10s");
if (info->irq[3] < 0) {
ret = -ENOENT;
goto err_irq3;
}
ret = request_irq(info->irq[3], hi6421_onkey_handler,
IRQF_DISABLED, "hold 10s", info);
if (ret < 0)
goto err_irq3;
info->idev = input_allocate_device();
if (!info->idev) {
dev_err(&pdev->dev, "Failed to allocate input device\n");
goto err_alloc;
}
info->idev->name = "hi6421_on";
info->idev->phys = "hi6421_on/input0";
info->idev->dev.parent = &pdev->dev;
info->idev->evbit[0] = BIT_MASK(EV_KEY);
__set_bit(KEY_POWER, info->idev->keybit);
ret = input_register_device(info->idev);
if (ret) {
dev_err(&pdev->dev, "Can't register input device: %d\n", ret);
goto err_reg;
}
platform_set_drvdata(pdev, info);
return ret;
err_reg:
input_free_device(info->idev);
err_alloc:
free_irq(info->irq[3], info);
err_irq3:
free_irq(info->irq[2], info);
err_irq2:
free_irq(info->irq[1], info);
err:
free_irq(info->irq[0], info);
return ret;
}
static int hi6421_onkey_remove(struct platform_device *pdev)
{
return 0;
}
static struct of_device_id hi6421_onkey_of_match[] = {
{ .compatible = "hisilicon,hi6421-onkey", },
{ },
};
MODULE_DEVICE_TABLE(of, hi6421_onkey_of_match);
static struct platform_driver hi6421_onkey_driver = {
.probe = hi6421_onkey_probe,
.remove = hi6421_onkey_remove,
.driver = {
.owner = THIS_MODULE,
.name = "hi6421-onkey",
.of_match_table = hi6421_onkey_of_match,
},
};
module_platform_driver(hi6421_onkey_driver);
MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@linaro.org");
MODULE_DESCRIPTION("Hi6421 PMIC Power key driver");
MODULE_LICENSE("GPL v2");
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