forked from 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.
130 lines
3.2 KiB
130 lines
3.2 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* Copyright (C) ST-Ericsson SA 2010 |
|
* |
|
* Author: Sundar Iyer <[email protected]> for ST-Ericsson |
|
* |
|
* AB8500 Power-On Key handler |
|
*/ |
|
|
|
#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/mfd/abx500/ab8500.h> |
|
#include <linux/of.h> |
|
#include <linux/slab.h> |
|
|
|
/** |
|
* struct ab8500_ponkey - ab8500 ponkey information |
|
* @idev: pointer to input device |
|
* @ab8500: ab8500 parent |
|
* @irq_dbf: irq number for falling transition |
|
* @irq_dbr: irq number for rising transition |
|
*/ |
|
struct ab8500_ponkey { |
|
struct input_dev *idev; |
|
struct ab8500 *ab8500; |
|
int irq_dbf; |
|
int irq_dbr; |
|
}; |
|
|
|
/* AB8500 gives us an interrupt when ONKEY is held */ |
|
static irqreturn_t ab8500_ponkey_handler(int irq, void *data) |
|
{ |
|
struct ab8500_ponkey *ponkey = data; |
|
|
|
if (irq == ponkey->irq_dbf) |
|
input_report_key(ponkey->idev, KEY_POWER, true); |
|
else if (irq == ponkey->irq_dbr) |
|
input_report_key(ponkey->idev, KEY_POWER, false); |
|
|
|
input_sync(ponkey->idev); |
|
|
|
return IRQ_HANDLED; |
|
} |
|
|
|
static int ab8500_ponkey_probe(struct platform_device *pdev) |
|
{ |
|
struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent); |
|
struct ab8500_ponkey *ponkey; |
|
struct input_dev *input; |
|
int irq_dbf, irq_dbr; |
|
int error; |
|
|
|
irq_dbf = platform_get_irq_byname(pdev, "ONKEY_DBF"); |
|
if (irq_dbf < 0) |
|
return irq_dbf; |
|
|
|
irq_dbr = platform_get_irq_byname(pdev, "ONKEY_DBR"); |
|
if (irq_dbr < 0) |
|
return irq_dbr; |
|
|
|
ponkey = devm_kzalloc(&pdev->dev, sizeof(struct ab8500_ponkey), |
|
GFP_KERNEL); |
|
if (!ponkey) |
|
return -ENOMEM; |
|
|
|
input = devm_input_allocate_device(&pdev->dev); |
|
if (!input) |
|
return -ENOMEM; |
|
|
|
ponkey->idev = input; |
|
ponkey->ab8500 = ab8500; |
|
ponkey->irq_dbf = irq_dbf; |
|
ponkey->irq_dbr = irq_dbr; |
|
|
|
input->name = "AB8500 POn(PowerOn) Key"; |
|
input->dev.parent = &pdev->dev; |
|
|
|
input_set_capability(input, EV_KEY, KEY_POWER); |
|
|
|
error = devm_request_any_context_irq(&pdev->dev, ponkey->irq_dbf, |
|
ab8500_ponkey_handler, 0, |
|
"ab8500-ponkey-dbf", ponkey); |
|
if (error < 0) { |
|
dev_err(ab8500->dev, "Failed to request dbf IRQ#%d: %d\n", |
|
ponkey->irq_dbf, error); |
|
return error; |
|
} |
|
|
|
error = devm_request_any_context_irq(&pdev->dev, ponkey->irq_dbr, |
|
ab8500_ponkey_handler, 0, |
|
"ab8500-ponkey-dbr", ponkey); |
|
if (error < 0) { |
|
dev_err(ab8500->dev, "Failed to request dbr IRQ#%d: %d\n", |
|
ponkey->irq_dbr, error); |
|
return error; |
|
} |
|
|
|
error = input_register_device(ponkey->idev); |
|
if (error) { |
|
dev_err(ab8500->dev, "Can't register input device: %d\n", error); |
|
return error; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
#ifdef CONFIG_OF |
|
static const struct of_device_id ab8500_ponkey_match[] = { |
|
{ .compatible = "stericsson,ab8500-ponkey", }, |
|
{} |
|
}; |
|
MODULE_DEVICE_TABLE(of, ab8500_ponkey_match); |
|
#endif |
|
|
|
static struct platform_driver ab8500_ponkey_driver = { |
|
.driver = { |
|
.name = "ab8500-poweron-key", |
|
.of_match_table = of_match_ptr(ab8500_ponkey_match), |
|
}, |
|
.probe = ab8500_ponkey_probe, |
|
}; |
|
module_platform_driver(ab8500_ponkey_driver); |
|
|
|
MODULE_LICENSE("GPL v2"); |
|
MODULE_AUTHOR("Sundar Iyer <[email protected]>"); |
|
MODULE_DESCRIPTION("ST-Ericsson AB8500 Power-ON(Pon) Key driver");
|
|
|