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/*
* Copyright (c) 2006-2022, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-3-08 GuEe-GUI the first version
*/
#include <rthw.h>
#include <rtthread.h>
#include <rtdevice.h>
struct e3x0_button
{
struct rt_input_device parent;
int press_irq, release_irq;
};
static void e3x0_button_press_isr(int irqno, void *param)
{
struct e3x0_button *btn = param;
rt_input_report_key(&btn->parent, KEY_POWER, 1);
rt_input_sync(&btn->parent);
}
static void e3x0_button_release_isr(int irqno, void *param)
{
struct e3x0_button *btn = param;
rt_input_report_key(&btn->parent, KEY_POWER, 0);
rt_input_sync(&btn->parent);
}
static rt_err_t e3x0_button_probe(struct rt_platform_device *pdev)
{
rt_err_t err;
struct rt_device *dev = &pdev->parent;
struct e3x0_button *btn = rt_calloc(1, sizeof(*btn));
if (!btn)
{
return -RT_ENOMEM;
}
if ((btn->press_irq = rt_dm_dev_get_irq_by_name(dev, "press")) < 0)
{
err = btn->press_irq;
goto _fail;
}
if ((btn->release_irq = rt_dm_dev_get_irq_by_name(dev, "release")) < 0)
{
err = btn->release_irq;
goto _fail;
}
rt_input_set_capability(&btn->parent, EV_KEY, KEY_POWER);
if ((err = rt_input_device_register(&btn->parent)))
{
goto _fail;
}
dev->user_data = btn;
rt_hw_interrupt_install(btn->press_irq, e3x0_button_press_isr, btn, "button-e3x0-press");
rt_hw_interrupt_umask(btn->press_irq);
rt_hw_interrupt_install(btn->release_irq, e3x0_button_release_isr, btn, "button-e3x0-release");
rt_hw_interrupt_umask(btn->release_irq);
return RT_EOK;
_fail:
rt_free(btn);
return err;
}
static rt_err_t e3x0_button_remove(struct rt_platform_device *pdev)
{
struct e3x0_button *btn = pdev->parent.user_data;
rt_hw_interrupt_mask(btn->press_irq);
rt_pic_detach_irq(btn->press_irq, btn);
rt_hw_interrupt_mask(btn->release_irq);
rt_pic_detach_irq(btn->release_irq, btn);
rt_input_device_unregister(&btn->parent);
rt_free(btn);
return RT_EOK;
}
static const struct rt_ofw_node_id e3x0_button_ofw_ids[] =
{
{ .compatible = "ettus,e3x0-button" },
{ /* sentinel */ }
};
static struct rt_platform_driver e3x0_button_driver =
{
.name = "e3x0-button",
.ids = e3x0_button_ofw_ids,
.probe = e3x0_button_probe,
.remove = e3x0_button_remove,
};
RT_PLATFORM_DRIVER_EXPORT(e3x0_button_driver);
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