mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
135 lines
3.1 KiB
135 lines
3.1 KiB
// 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 <[email protected]>"); |
|
MODULE_DESCRIPTION("NI Ettus Research USRP E3x0 Button driver"); |
|
MODULE_ALIAS("platform:e3x0-button");
|
|
|