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// SPDX-License-Identifier: GPL-2.0
/*
* Driver for the PF1550 ONKEY
* Copyright (C) 2016 Freescale Semiconductor, Inc. All Rights Reserved.
*
* Portions Copyright (c) 2025 Savoir-faire Linux Inc.
* Samuel Kayode <samuel.kayode@savoirfairelinux.com>
*/
#include <linux/err.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mfd/pf1550.h>
#include <linux/platform_device.h>
#define PF1550_ONKEY_IRQ_NR 6
struct onkey_drv_data {
struct device *dev;
const struct pf1550_ddata *pf1550;
bool wakeup;
struct input_dev *input;
};
static irqreturn_t pf1550_onkey_irq_handler(int irq, void *data)
{
struct onkey_drv_data *onkey = data;
struct platform_device *pdev = to_platform_device(onkey->dev);
int i, state, irq_type = -1;
for (i = 0; i < PF1550_ONKEY_IRQ_NR; i++)
if (irq == platform_get_irq(pdev, i))
irq_type = i;
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, KEY_POWER, 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;
bool key_power = false;
int i, irq, error;
onkey = devm_kzalloc(&pdev->dev, sizeof(*onkey), GFP_KERNEL);
if (!onkey)
return -ENOMEM;
onkey->dev = &pdev->dev;
onkey->pf1550 = dev_get_drvdata(pdev->dev.parent);
if (!onkey->pf1550->regmap)
return dev_err_probe(&pdev->dev, -ENODEV,
"failed to get regmap\n");
onkey->wakeup = device_property_read_bool(pdev->dev.parent,
"wakeup-source");
if (device_property_read_bool(pdev->dev.parent,
"nxp,disable-key-power")) {
error = regmap_clear_bits(onkey->pf1550->regmap,
PF1550_PMIC_REG_PWRCTRL1,
PF1550_ONKEY_RST_EN);
if (error)
return dev_err_probe(&pdev->dev, error,
"failed: disable turn system off");
} else {
key_power = true;
}
input = devm_input_allocate_device(&pdev->dev);
if (!input)
return dev_err_probe(&pdev->dev, -ENOMEM,
"failed to allocate the input device\n");
input->name = pdev->name;
input->phys = "pf1550-onkey/input0";
input->id.bustype = BUS_HOST;
if (key_power)
input_set_capability(input, EV_KEY, KEY_POWER);
onkey->input = input;
platform_set_drvdata(pdev, onkey);
for (i = 0; i < PF1550_ONKEY_IRQ_NR; i++) {
irq = platform_get_irq(pdev, i);
if (irq < 0)
return irq;
error = devm_request_threaded_irq(&pdev->dev, irq, NULL,
pf1550_onkey_irq_handler,
IRQF_NO_SUSPEND,
"pf1550-onkey", onkey);
if (error)
return dev_err_probe(&pdev->dev, error,
"failed: irq request (IRQ: %d)\n",
i);
}
error = input_register_device(input);
if (error)
return dev_err_probe(&pdev->dev, error,
"failed to register input device\n");
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);
int i, irq;
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
for (i = 0; i < PF1550_ONKEY_IRQ_NR; i++) {
irq = platform_get_irq(pdev, i);
if (irq > 0)
enable_irq_wake(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);
int i, irq;
if (!device_may_wakeup(&pdev->dev))
regmap_write(onkey->pf1550->regmap,
PF1550_PMIC_REG_ONKEY_INT_MASK0,
~((u8)(ONKEY_IRQ_PUSHI | ONKEY_IRQ_1SI |
ONKEY_IRQ_2SI | ONKEY_IRQ_3SI | ONKEY_IRQ_4SI |
ONKEY_IRQ_8SI)));
else
for (i = 0; i < PF1550_ONKEY_IRQ_NR; i++) {
irq = platform_get_irq(pdev, i);
if (irq > 0)
disable_irq_wake(irq);
}
return 0;
}
static SIMPLE_DEV_PM_OPS(pf1550_onkey_pm_ops, pf1550_onkey_suspend,
pf1550_onkey_resume);
static const struct platform_device_id pf1550_onkey_id[] = {
{ "pf1550-onkey", },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(platform, pf1550_onkey_id);
static struct platform_driver pf1550_onkey_driver = {
.driver = {
.name = "pf1550-onkey",
.pm = pm_sleep_ptr(&pf1550_onkey_pm_ops),
},
.probe = pf1550_onkey_probe,
.id_table = pf1550_onkey_id,
};
module_platform_driver(pf1550_onkey_driver);
MODULE_AUTHOR("Freescale Semiconductor");
MODULE_DESCRIPTION("PF1550 onkey Driver");
MODULE_LICENSE("GPL");
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