pf1550_onkey.c
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/*
* Driver for the PF1550 ON_KEY
* Copyright (C) 2016 Freescale Semiconductor, Inc. All Rights Reserved.
*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
#include <linux/device.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mfd/pf1550.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
struct onkey_drv_data {
struct device *dev;
struct pf1550_dev *pf1550;
int irq;
int keycode;
int wakeup;
struct input_dev *input;
};
static struct pf1550_irq_info pf1550_onkey_irqs[] = {
{ PF1550_ONKEY_IRQ_PUSHI, "release" },
{ PF1550_ONKEY_IRQ_1SI, "1S" },
{ PF1550_ONKEY_IRQ_2SI, "2S" },
{ PF1550_ONKEY_IRQ_3SI, "3S" },
{ PF1550_ONKEY_IRQ_4SI, "4S" },
{ PF1550_ONKEY_IRQ_8SI, "8S" },
};
static irqreturn_t pf1550_onkey_irq_handler(int irq, void *data)
{
struct onkey_drv_data *onkey = data;
int i, state, irq_type = -1;
onkey->irq = irq;
for (i = 0; i < ARRAY_SIZE(pf1550_onkey_irqs); i++)
if (onkey->irq == pf1550_onkey_irqs[i].virq)
irq_type = pf1550_onkey_irqs[i].irq;
switch (irq_type) {
case PF1550_ONKEY_IRQ_PUSHI:
state = 0;
break;
case PF1550_ONKEY_IRQ_1SI:
case PF1550_ONKEY_IRQ_2SI:
case PF1550_ONKEY_IRQ_3SI:
case PF1550_ONKEY_IRQ_4SI:
case PF1550_ONKEY_IRQ_8SI:
state = 1;
break;
default:
dev_err(onkey->dev, "onkey interrupt: irq %d occurred\n",
irq_type);
return IRQ_HANDLED;
}
input_event(onkey->input, EV_KEY, onkey->keycode, state);
input_sync(onkey->input);
return IRQ_HANDLED;
}
static int pf1550_onkey_probe(struct platform_device *pdev)
{
struct onkey_drv_data *onkey;
struct input_dev *input = NULL;
struct device_node *np = pdev->dev.of_node;
struct pf1550_dev *pf1550 = dev_get_drvdata(pdev->dev.parent);
int i, error;
if (!np)
return -ENODEV;
onkey = devm_kzalloc(&pdev->dev, sizeof(*onkey), GFP_KERNEL);
if (!onkey)
return -ENOMEM;
if (of_property_read_u32(np, "linux,keycode", &onkey->keycode)) {
onkey->keycode = KEY_POWER;
dev_warn(&pdev->dev, "KEY_POWER without setting in dts\n");
}
onkey->wakeup = of_property_read_bool(np, "wakeup");
input = devm_input_allocate_device(&pdev->dev);
if (!input) {
dev_err(&pdev->dev, "failed to allocate the input device\n");
return -ENOMEM;
}
input->name = pdev->name;
input->phys = "pf1550-onkey/input0";
input->id.bustype = BUS_HOST;
input_set_capability(input, EV_KEY, onkey->keycode);
for (i = 0; i < ARRAY_SIZE(pf1550_onkey_irqs); i++) {
struct pf1550_irq_info *onkey_irq =
&pf1550_onkey_irqs[i];
unsigned int virq = 0;
virq = regmap_irq_get_virq(pf1550->irq_data_onkey,
onkey_irq->irq);
if (!virq)
return -EINVAL;
onkey_irq->virq = virq;
error = devm_request_threaded_irq(&pdev->dev, virq, NULL,
pf1550_onkey_irq_handler,
IRQF_NO_SUSPEND,
onkey_irq->name, onkey);
if (error) {
dev_err(&pdev->dev,
"failed: irq request (IRQ: %d, error :%d)\n",
onkey_irq->irq, error);
return error;
}
}
error = input_register_device(input);
if (error < 0) {
dev_err(&pdev->dev, "failed to register input device\n");
input_free_device(input);
return error;
}
onkey->input = input;
onkey->pf1550 = pf1550;
platform_set_drvdata(pdev, onkey);
device_init_wakeup(&pdev->dev, onkey->wakeup);
return 0;
}
static int pf1550_onkey_suspend(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct onkey_drv_data *onkey = platform_get_drvdata(pdev);
if (!device_may_wakeup(&pdev->dev))
regmap_write(onkey->pf1550->regmap,
PF1550_PMIC_REG_ONKEY_INT_MASK0,
ONKEY_IRQ_PUSHI | ONKEY_IRQ_1SI | ONKEY_IRQ_2SI |
ONKEY_IRQ_3SI | ONKEY_IRQ_4SI | ONKEY_IRQ_8SI);
else
enable_irq_wake(onkey->pf1550->irq);
return 0;
}
static int pf1550_onkey_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct onkey_drv_data *onkey = platform_get_drvdata(pdev);
if (!device_may_wakeup(&pdev->dev))
regmap_write(onkey->pf1550->regmap,
PF1550_PMIC_REG_ONKEY_INT_MASK0,
~(ONKEY_IRQ_PUSHI | ONKEY_IRQ_1SI | ONKEY_IRQ_2SI |
ONKEY_IRQ_3SI | ONKEY_IRQ_4SI | ONKEY_IRQ_8SI));
else
disable_irq_wake(onkey->pf1550->irq);
return 0;
}
static const struct of_device_id pf1550_onkey_ids[] = {
{ .compatible = "fsl,pf1550-onkey" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, pf1550_onkey_ids);
static SIMPLE_DEV_PM_OPS(pf1550_onkey_pm_ops, pf1550_onkey_suspend,
pf1550_onkey_resume);
static struct platform_driver pf1550_onkey_driver = {
.driver = {
.name = "pf1550-onkey",
.pm = &pf1550_onkey_pm_ops,
.of_match_table = pf1550_onkey_ids,
},
.probe = pf1550_onkey_probe,
};
module_platform_driver(pf1550_onkey_driver);
MODULE_AUTHOR("Freescale Semiconductor");
MODULE_DESCRIPTION(" PF1550 onkey Driver");
MODULE_LICENSE("GPL");