[mirror_ubuntu-bionic-kernel.git] / drivers / input / misc / ab8500-ponkey.c

/*
 * Copyright (C) ST-Ericsson SA 2010
 *
 * License Terms: GNU General Public License v2
 * Author: Sundar Iyer <sundar.iyer@stericsson.com> for ST-Ericsson
 *
 * AB8500 Power-On Key handler
 */

#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/slab.h>

/**
 * struct ab8500_ponkey - ab8500 ponkey information
 * @input_dev: 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 __devinit 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) {
		dev_err(&pdev->dev, "No IRQ for ONKEY_DBF, error=%d\n", irq_dbf);
		return irq_dbf;
	}

	irq_dbr = platform_get_irq_byname(pdev, "ONKEY_DBR");
	if (irq_dbr < 0) {
		dev_err(&pdev->dev, "No IRQ for ONKEY_DBR, error=%d\n", irq_dbr);
		return irq_dbr;
	}

	ponkey = kzalloc(sizeof(struct ab8500_ponkey), GFP_KERNEL);
	input = input_allocate_device();
	if (!ponkey || !input) {
		error = -ENOMEM;
		goto err_free_mem;
	}

	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 = request_any_context_irq(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);
		goto err_free_mem;
	}

	error = request_any_context_irq(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);
		goto err_free_dbf_irq;
	}

	error = input_register_device(ponkey->idev);
	if (error) {
		dev_err(ab8500->dev, "Can't register input device: %d\n", error);
		goto err_free_dbr_irq;
	}

	platform_set_drvdata(pdev, ponkey);
	return 0;

err_free_dbr_irq:
	free_irq(ponkey->irq_dbr, ponkey);
err_free_dbf_irq:
	free_irq(ponkey->irq_dbf, ponkey);
err_free_mem:
	input_free_device(input);
	kfree(ponkey);

	return error;
}

static int __devexit ab8500_ponkey_remove(struct platform_device *pdev)
{
	struct ab8500_ponkey *ponkey = platform_get_drvdata(pdev);

	free_irq(ponkey->irq_dbf, ponkey);
	free_irq(ponkey->irq_dbr, ponkey);
	input_unregister_device(ponkey->idev);
	kfree(ponkey);

	platform_set_drvdata(pdev, NULL);

	return 0;
}

static struct platform_driver ab8500_ponkey_driver = {
	.driver		= {
		.name	= "ab8500-poweron-key",
		.owner	= THIS_MODULE,
	},
	.probe		= ab8500_ponkey_probe,
	.remove		= __devexit_p(ab8500_ponkey_remove),
};
module_platform_driver(ab8500_ponkey_driver);

MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Sundar Iyer <sundar.iyer@stericsson.com>");
MODULE_DESCRIPTION("ST-Ericsson AB8500 Power-ON(Pon) Key driver");
Commit	Line	Data
77686517 SI	1	/*
	2	* Copyright (C) ST-Ericsson SA 2010
	3	*
	4	* License Terms: GNU General Public License v2
	5	* Author: Sundar Iyer <sundar.iyer@stericsson.com> for ST-Ericsson
	6	*
	7	* AB8500 Power-On Key handler
	8	*/
	9
	10	#include <linux/kernel.h>
	11	#include <linux/module.h>
	12	#include <linux/platform_device.h>
	13	#include <linux/input.h>
	14	#include <linux/interrupt.h>
ee66e653	15	#include <linux/mfd/abx500/ab8500.h>
77686517 SI	16	#include <linux/slab.h>
	17
	18	/**
	19	* struct ab8500_ponkey - ab8500 ponkey information
	20	* @input_dev: pointer to input device
	21	* @ab8500: ab8500 parent
	22	* @irq_dbf: irq number for falling transition
	23	* @irq_dbr: irq number for rising transition
	24	*/
	25	struct ab8500_ponkey {
	26	struct input_dev *idev;
	27	struct ab8500 *ab8500;
	28	int irq_dbf;
	29	int irq_dbr;
	30	};
	31
	32	/* AB8500 gives us an interrupt when ONKEY is held */
	33	static irqreturn_t ab8500_ponkey_handler(int irq, void *data)
	34	{
	35	struct ab8500_ponkey *ponkey = data;
	36
	37	if (irq == ponkey->irq_dbf)
	38	input_report_key(ponkey->idev, KEY_POWER, true);
	39	else if (irq == ponkey->irq_dbr)
	40	input_report_key(ponkey->idev, KEY_POWER, false);
	41
	42	input_sync(ponkey->idev);
	43
	44	return IRQ_HANDLED;
	45	}
	46
	47	static int __devinit ab8500_ponkey_probe(struct platform_device *pdev)
	48	{
	49	struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent);
	50	struct ab8500_ponkey *ponkey;
	51	struct input_dev *input;
	52	int irq_dbf, irq_dbr;
	53	int error;
	54
	55	irq_dbf = platform_get_irq_byname(pdev, "ONKEY_DBF");
	56	if (irq_dbf < 0) {
	57	dev_err(&pdev->dev, "No IRQ for ONKEY_DBF, error=%d\n", irq_dbf);
	58	return irq_dbf;
	59	}
	60
	61	irq_dbr = platform_get_irq_byname(pdev, "ONKEY_DBR");
	62	if (irq_dbr < 0) {
	63	dev_err(&pdev->dev, "No IRQ for ONKEY_DBR, error=%d\n", irq_dbr);
	64	return irq_dbr;
	65	}
	66
	67	ponkey = kzalloc(sizeof(struct ab8500_ponkey), GFP_KERNEL);
	68	input = input_allocate_device();
	69	if (!ponkey \|\| !input) {
	70	error = -ENOMEM;
	71	goto err_free_mem;
	72	}
	73
	74	ponkey->idev = input;
	75	ponkey->ab8500 = ab8500;
	76	ponkey->irq_dbf = irq_dbf;
	77	ponkey->irq_dbr = irq_dbr;
	78
	79	input->name = "AB8500 POn(PowerOn) Key";
80	input->dev.parent = &pdev->dev;
81
82	input_set_capability(input, EV_KEY, KEY_POWER);
83
84	error = request_any_context_irq(ponkey->irq_dbf, ab8500_ponkey_handler,
85	0, "ab8500-ponkey-dbf", ponkey);
86	if (error < 0) {
87	dev_err(ab8500->dev, "Failed to request dbf IRQ#%d: %d\n",
88	ponkey->irq_dbf, error);
89	goto err_free_mem;
90	}
91
92	error = request_any_context_irq(ponkey->irq_dbr, ab8500_ponkey_handler,
93	0, "ab8500-ponkey-dbr", ponkey);
94	if (error < 0) {
95	dev_err(ab8500->dev, "Failed to request dbr IRQ#%d: %d\n",
96	ponkey->irq_dbr, error);
97	goto err_free_dbf_irq;
98	}
99
100	error = input_register_device(ponkey->idev);
101	if (error) {
102	dev_err(ab8500->dev, "Can't register input device: %d\n", error);
103	goto err_free_dbr_irq;
104	}
105
106	platform_set_drvdata(pdev, ponkey);
107	return 0;
108
109	err_free_dbr_irq:
c5fb514d	110	free_irq(ponkey->irq_dbr, ponkey);
77686517 SI	111	err_free_dbf_irq:
	112	free_irq(ponkey->irq_dbf, ponkey);
	113	err_free_mem:
	114	input_free_device(input);
	115	kfree(ponkey);
	116
	117	return error;
	118	}
	119
	120	static int __devexit ab8500_ponkey_remove(struct platform_device *pdev)
	121	{
	122	struct ab8500_ponkey *ponkey = platform_get_drvdata(pdev);
	123
	124	free_irq(ponkey->irq_dbf, ponkey);
	125	free_irq(ponkey->irq_dbr, ponkey);
	126	input_unregister_device(ponkey->idev);
	127	kfree(ponkey);
	128
	129	platform_set_drvdata(pdev, NULL);
	130
	131	return 0;
	132	}
	133
	134	static struct platform_driver ab8500_ponkey_driver = {
	135	.driver = {
	136	.name = "ab8500-poweron-key",
	137	.owner = THIS_MODULE,
	138	},
	139	.probe = ab8500_ponkey_probe,
	140	.remove = __devexit_p(ab8500_ponkey_remove),
	141	};
840a746b	142	module_platform_driver(ab8500_ponkey_driver);
77686517 SI	143
	144	MODULE_LICENSE("GPL v2");
	145	MODULE_AUTHOR("Sundar Iyer <sundar.iyer@stericsson.com>");
	146	MODULE_DESCRIPTION("ST-Ericsson AB8500 Power-ON(Pon) Key driver");