Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2014, National Instruments Corp. All rights reserved.
 *
 * Driver for NI Ettus Research USRP E3x0 Button Driver
 */
 
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/of.h>
#include <linux/slab.h>
 
static irqreturn_t e3x0_button_release_handler(int irq, void *data)
{
<------>struct input_dev *idev = data;
 
<------>input_report_key(idev, KEY_POWER, 0);
<------>input_sync(idev);
 
<------>return IRQ_HANDLED;
}
 
static irqreturn_t e3x0_button_press_handler(int irq, void *data)
{
<------>struct input_dev *idev = data;
 
<------>input_report_key(idev, KEY_POWER, 1);
<------>pm_wakeup_event(idev->dev.parent, 0);
<------>input_sync(idev);
 
<------>return IRQ_HANDLED;
}
 
static int __maybe_unused e3x0_button_suspend(struct device *dev)
{
<------>struct platform_device *pdev = to_platform_device(dev);
 
<------>if (device_may_wakeup(dev))
<------><------>enable_irq_wake(platform_get_irq_byname(pdev, "press"));
 
<------>return 0;
}
 
static int __maybe_unused e3x0_button_resume(struct device *dev)
{
<------>struct platform_device *pdev = to_platform_device(dev);
 
<------>if (device_may_wakeup(dev))
<------><------>disable_irq_wake(platform_get_irq_byname(pdev, "press"));
 
<------>return 0;
}
 
static SIMPLE_DEV_PM_OPS(e3x0_button_pm_ops,
<------><------><------> e3x0_button_suspend, e3x0_button_resume);
 
static int e3x0_button_probe(struct platform_device *pdev)
{
<------>struct input_dev *input;
<------>int irq_press, irq_release;
<------>int error;
 
<------>irq_press = platform_get_irq_byname(pdev, "press");
<------>if (irq_press < 0)
<------><------>return irq_press;
 
<------>irq_release = platform_get_irq_byname(pdev, "release");
<------>if (irq_release < 0)
<------><------>return irq_release;
 
<------>input = devm_input_allocate_device(&pdev->dev);
<------>if (!input)
<------><------>return -ENOMEM;
 
<------>input->name = "NI Ettus Research USRP E3x0 Button Driver";
<------>input->phys = "e3x0_button/input0";
<------>input->dev.parent = &pdev->dev;
 
<------>input_set_capability(input, EV_KEY, KEY_POWER);
 
<------>error = devm_request_irq(&pdev->dev, irq_press,
<------><------><------><------> e3x0_button_press_handler, 0,
<------><------><------><------> "e3x0-button", input);
<------>if (error) {
<------><------>dev_err(&pdev->dev, "Failed to request 'press' IRQ#%d: %d\n",
<------><------><------>irq_press, error);
<------><------>return error;
<------>}
 
<------>error = devm_request_irq(&pdev->dev, irq_release,
<------><------><------><------> e3x0_button_release_handler, 0,
<------><------><------><------> "e3x0-button", input);
<------>if (error) {
<------><------>dev_err(&pdev->dev, "Failed to request 'release' IRQ#%d: %d\n",
<------><------><------>irq_release, error);
<------><------>return error;
<------>}
 
<------>error = input_register_device(input);
<------>if (error) {
<------><------>dev_err(&pdev->dev, "Can't register input device: %d\n", error);
<------><------>return error;
<------>}
 
<------>device_init_wakeup(&pdev->dev, 1);
<------>return 0;
}
 
#ifdef CONFIG_OF
static const struct of_device_id e3x0_button_match[] = {
<------>{ .compatible = "ettus,e3x0-button", },
<------>{ }
};
MODULE_DEVICE_TABLE(of, e3x0_button_match);
#endif
 
static struct platform_driver e3x0_button_driver = {
<------>.driver		= {
<------><------>.name	= "e3x0-button",
<------><------>.of_match_table = of_match_ptr(e3x0_button_match),
<------><------>.pm	= &e3x0_button_pm_ops,
<------>},
<------>.probe		= e3x0_button_probe,
};
 
module_platform_driver(e3x0_button_driver);
 
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Moritz Fischer <moritz.fischer@ettus.com>");
MODULE_DESCRIPTION("NI Ettus Research USRP E3x0 Button driver");
MODULE_ALIAS("platform:e3x0-button");