[linux-2.6-block.git] / drivers / input / misc / hisi_powerkey.c

/*
 * Hisilicon PMIC powerkey driver
 *
 * Copyright (C) 2013 Hisilicon Ltd.
 * Copyright (C) 2015, 2016 Linaro Ltd.
 *
 * This file is subject to the terms and conditions of the GNU General
 * Public License. See the file "COPYING" in the main directory of this
 * archive for more details.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/reboot.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_irq.h>
#include <linux/input.h>
#include <linux/slab.h>

/* the held interrupt will trigger after 4 seconds */
#define MAX_HELD_TIME	(4 * MSEC_PER_SEC)

static irqreturn_t hi65xx_power_press_isr(int irq, void *q)
{
	struct input_dev *input = q;

	pm_wakeup_event(input->dev.parent, MAX_HELD_TIME);
	input_report_key(input, KEY_POWER, 1);
	input_sync(input);

	return IRQ_HANDLED;
}

static irqreturn_t hi65xx_power_release_isr(int irq, void *q)
{
	struct input_dev *input = q;

	pm_wakeup_event(input->dev.parent, MAX_HELD_TIME);
	input_report_key(input, KEY_POWER, 0);
	input_sync(input);

	return IRQ_HANDLED;
}

static irqreturn_t hi65xx_restart_toggle_isr(int irq, void *q)
{
	struct input_dev *input = q;
	int value = test_bit(KEY_RESTART, input->key);

	pm_wakeup_event(input->dev.parent, MAX_HELD_TIME);
	input_report_key(input, KEY_RESTART, !value);
	input_sync(input);

	return IRQ_HANDLED;
}

static const struct {
	const char *name;
	irqreturn_t (*handler)(int irq, void *q);
} hi65xx_irq_info[] = {
	{ "down", hi65xx_power_press_isr },
	{ "up", hi65xx_power_release_isr },
	{ "hold 4s", hi65xx_restart_toggle_isr },
};

static int hi65xx_powerkey_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct input_dev *input;
	int irq, i, error;

	input = devm_input_allocate_device(&pdev->dev);
	if (!input) {
		dev_err(&pdev->dev, "failed to allocate input device\n");
		return -ENOMEM;
	}

	input->phys = "hisi_on/input0";
	input->name = "HISI 65xx PowerOn Key";

	input_set_capability(input, EV_KEY, KEY_POWER);
	input_set_capability(input, EV_KEY, KEY_RESTART);

	for (i = 0; i < ARRAY_SIZE(hi65xx_irq_info); i++) {

		irq = platform_get_irq_byname(pdev, hi65xx_irq_info[i].name);
		if (irq < 0) {
			error = irq;
			dev_err(dev, "couldn't get irq %s: %d\n",
				hi65xx_irq_info[i].name, error);
			return error;
		}

		error = devm_request_any_context_irq(dev, irq,
						     hi65xx_irq_info[i].handler,
						     IRQF_ONESHOT,
						     hi65xx_irq_info[i].name,
						     input);
		if (error < 0) {
			dev_err(dev, "couldn't request irq %s: %d\n",
				hi65xx_irq_info[i].name, error);
			return error;
		}
	}

	error = input_register_device(input);
	if (error) {
		dev_err(&pdev->dev, "failed to register input device: %d\n",
			error);
		return error;
	}

	device_init_wakeup(&pdev->dev, 1);

	return 0;
}

static int hi65xx_powerkey_remove(struct platform_device *pdev)
{
	device_init_wakeup(&pdev->dev, 0);

	return 0;
}

static struct platform_driver hi65xx_powerkey_driver = {
	.driver = {
		.name = "hi65xx-powerkey",
	},
	.probe = hi65xx_powerkey_probe,
	.remove  = hi65xx_powerkey_remove,
};
module_platform_driver(hi65xx_powerkey_driver);

MODULE_AUTHOR("Zhiliang Xue <xuezhiliang@huawei.com");
MODULE_DESCRIPTION("Hisi PMIC Power key driver");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
fcd6eb50 JRO	1	/*
	2	* Hisilicon PMIC powerkey driver
	3	*
	4	* Copyright (C) 2013 Hisilicon Ltd.
	5	* Copyright (C) 2015, 2016 Linaro Ltd.
	6	*
	7	* This file is subject to the terms and conditions of the GNU General
	8	* Public License. See the file "COPYING" in the main directory of this
	9	* archive for more details.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*/
	16
	17	#include <linux/platform_device.h>
	18	#include <linux/interrupt.h>
	19	#include <linux/reboot.h>
	20	#include <linux/kernel.h>
	21	#include <linux/module.h>
	22	#include <linux/of_irq.h>
	23	#include <linux/input.h>
	24	#include <linux/slab.h>
	25
	26	/* the held interrupt will trigger after 4 seconds */
	27	#define MAX_HELD_TIME (4 * MSEC_PER_SEC)
	28
	29	static irqreturn_t hi65xx_power_press_isr(int irq, void *q)
	30	{
	31	struct input_dev *input = q;
	32
	33	pm_wakeup_event(input->dev.parent, MAX_HELD_TIME);
	34	input_report_key(input, KEY_POWER, 1);
	35	input_sync(input);
	36
	37	return IRQ_HANDLED;
	38	}
	39
	40	static irqreturn_t hi65xx_power_release_isr(int irq, void *q)
	41	{
	42	struct input_dev *input = q;
	43
	44	pm_wakeup_event(input->dev.parent, MAX_HELD_TIME);
	45	input_report_key(input, KEY_POWER, 0);
	46	input_sync(input);
	47
	48	return IRQ_HANDLED;
	49	}
	50
	51	static irqreturn_t hi65xx_restart_toggle_isr(int irq, void *q)
	52	{
	53	struct input_dev *input = q;
	54	int value = test_bit(KEY_RESTART, input->key);
	55
	56	pm_wakeup_event(input->dev.parent, MAX_HELD_TIME);
	57	input_report_key(input, KEY_RESTART, !value);
	58	input_sync(input);
	59
	60	return IRQ_HANDLED;
	61	}
	62
	63	static const struct {
	64	const char *name;
65	irqreturn_t (handler)(int irq, void q);
66	} hi65xx_irq_info[] = {
67	{ "down", hi65xx_power_press_isr },
68	{ "up", hi65xx_power_release_isr },
69	{ "hold 4s", hi65xx_restart_toggle_isr },
70	};
71
72	static int hi65xx_powerkey_probe(struct platform_device *pdev)
73	{
74	struct device *dev = &pdev->dev;
75	struct input_dev *input;
76	int irq, i, error;
77
78	input = devm_input_allocate_device(&pdev->dev);
79	if (!input) {
80	dev_err(&pdev->dev, "failed to allocate input device\n");
81	return -ENOMEM;
82	}
83
84	input->phys = "hisi_on/input0";
85	input->name = "HISI 65xx PowerOn Key";
86
87	input_set_capability(input, EV_KEY, KEY_POWER);
88	input_set_capability(input, EV_KEY, KEY_RESTART);
89
90	for (i = 0; i < ARRAY_SIZE(hi65xx_irq_info); i++) {
91
92	irq = platform_get_irq_byname(pdev, hi65xx_irq_info[i].name);
93	if (irq < 0) {
94	error = irq;
95	dev_err(dev, "couldn't get irq %s: %d\n",
96	hi65xx_irq_info[i].name, error);
97	return error;
98	}
99
100	error = devm_request_any_context_irq(dev, irq,
101	hi65xx_irq_info[i].handler,
102	IRQF_ONESHOT,
103	hi65xx_irq_info[i].name,
104	input);
105	if (error < 0) {
106	dev_err(dev, "couldn't request irq %s: %d\n",
107	hi65xx_irq_info[i].name, error);
108	return error;
109	}
110	}
111
112	error = input_register_device(input);
113	if (error) {
114	dev_err(&pdev->dev, "failed to register input device: %d\n",
115	error);
116	return error;
117	}
118
119	device_init_wakeup(&pdev->dev, 1);
120
121	return 0;
122	}
123
124	static int hi65xx_powerkey_remove(struct platform_device *pdev)
125	{
126	device_init_wakeup(&pdev->dev, 0);
127
128	return 0;
129	}
130
131	static struct platform_driver hi65xx_powerkey_driver = {
132	.driver = {
133	.name = "hi65xx-powerkey",
134	},
135	.probe = hi65xx_powerkey_probe,
136	.remove = hi65xx_powerkey_remove,
137	};
138	module_platform_driver(hi65xx_powerkey_driver);
139
140	MODULE_AUTHOR("Zhiliang Xue <xuezhiliang@huawei.com");
141	MODULE_DESCRIPTION("Hisi PMIC Power key driver");
142	MODULE_LICENSE("GPL v2");