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1/*
2 * 88pm860x_onkey.c - Marvell 88PM860x ONKEY driver
3 *
4 * Copyright (C) 2009-2010 Marvell International Ltd.
5 * Haojian Zhuang <haojian.zhuang@marvell.com>
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 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21#include <linux/kernel.h>
22#include <linux/module.h>
23#include <linux/platform_device.h>
24#include <linux/i2c.h>
25#include <linux/input.h>
26#include <linux/interrupt.h>
27#include <linux/mfd/88pm860x.h>
28#include <linux/slab.h>
29
30#define PM8607_WAKEUP 0x0b
31
32#define LONG_ONKEY_EN (1 << 1)
33#define ONKEY_STATUS (1 << 0)
34
35struct pm860x_onkey_info {
36 struct input_dev *idev;
37 struct pm860x_chip *chip;
38 struct i2c_client *i2c;
39 struct device *dev;
40 int irq;
41};
42
43/* 88PM860x gives us an interrupt when ONKEY is held */
44static irqreturn_t pm860x_onkey_handler(int irq, void *data)
45{
46 struct pm860x_onkey_info *info = data;
47 int ret;
48
49 ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
50 ret &= ONKEY_STATUS;
51 input_report_key(info->idev, KEY_POWER, ret);
52 input_sync(info->idev);
53
54 /* Enable 8-second long onkey detection */
55 pm860x_set_bits(info->i2c, PM8607_WAKEUP, 3, LONG_ONKEY_EN);
56 return IRQ_HANDLED;
57}
58
59static int __devinit pm860x_onkey_probe(struct platform_device *pdev)
60{
61 struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
62 struct pm860x_onkey_info *info;
63 int irq, ret;
64
65 irq = platform_get_irq(pdev, 0);
66 if (irq < 0) {
67 dev_err(&pdev->dev, "No IRQ resource!\n");
68 return -EINVAL;
69 }
70
71 info = kzalloc(sizeof(struct pm860x_onkey_info), GFP_KERNEL);
72 if (!info)
73 return -ENOMEM;
74 info->chip = chip;
75 info->i2c = (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
76 info->dev = &pdev->dev;
77 info->irq = irq;
78
79 info->idev = input_allocate_device();
80 if (!info->idev) {
81 dev_err(chip->dev, "Failed to allocate input dev\n");
82 ret = -ENOMEM;
83 goto out;
84 }
85
86 info->idev->name = "88pm860x_on";
87 info->idev->phys = "88pm860x_on/input0";
88 info->idev->id.bustype = BUS_I2C;
89 info->idev->dev.parent = &pdev->dev;
90 info->idev->evbit[0] = BIT_MASK(EV_KEY);
91 info->idev->keybit[BIT_WORD(KEY_POWER)] = BIT_MASK(KEY_POWER);
92
93 ret = input_register_device(info->idev);
94 if (ret) {
95 dev_err(chip->dev, "Can't register input device: %d\n", ret);
96 goto out_reg;
97 }
98
99 ret = request_threaded_irq(info->irq, NULL, pm860x_onkey_handler,
100 IRQF_ONESHOT, "onkey", info);
101 if (ret < 0) {
102 dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
103 info->irq, ret);
104 goto out_irq;
105 }
106
107 platform_set_drvdata(pdev, info);
108 return 0;
109
110out_irq:
111 input_unregister_device(info->idev);
112 kfree(info);
113 return ret;
114
115out_reg:
116 input_free_device(info->idev);
117out:
118 kfree(info);
119 return ret;
120}
121
122static int __devexit pm860x_onkey_remove(struct platform_device *pdev)
123{
124 struct pm860x_onkey_info *info = platform_get_drvdata(pdev);
125
126 free_irq(info->irq, info);
127 input_unregister_device(info->idev);
128 kfree(info);
129 return 0;
130}
131
132static struct platform_driver pm860x_onkey_driver = {
133 .driver = {
134 .name = "88pm860x-onkey",
135 .owner = THIS_MODULE,
136 },
137 .probe = pm860x_onkey_probe,
138 .remove = __devexit_p(pm860x_onkey_remove),
139};
140
141static int __init pm860x_onkey_init(void)
142{
143 return platform_driver_register(&pm860x_onkey_driver);
144}
145module_init(pm860x_onkey_init);
146
147static void __exit pm860x_onkey_exit(void)
148{
149 platform_driver_unregister(&pm860x_onkey_driver);
150}
151module_exit(pm860x_onkey_exit);
152
153MODULE_DESCRIPTION("Marvell 88PM860x ONKEY driver");
154MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
155MODULE_LICENSE("GPL");
1/*
2 * 88pm860x_onkey.c - Marvell 88PM860x ONKEY driver
3 *
4 * Copyright (C) 2009-2010 Marvell International Ltd.
5 * Haojian Zhuang <haojian.zhuang@marvell.com>
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 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21#include <linux/kernel.h>
22#include <linux/module.h>
23#include <linux/platform_device.h>
24#include <linux/i2c.h>
25#include <linux/input.h>
26#include <linux/interrupt.h>
27#include <linux/mfd/88pm860x.h>
28#include <linux/slab.h>
29#include <linux/device.h>
30
31#define PM8607_WAKEUP 0x0b
32
33#define LONG_ONKEY_EN (1 << 1)
34#define ONKEY_STATUS (1 << 0)
35
36struct pm860x_onkey_info {
37 struct input_dev *idev;
38 struct pm860x_chip *chip;
39 struct i2c_client *i2c;
40 struct device *dev;
41 int irq;
42};
43
44/* 88PM860x gives us an interrupt when ONKEY is held */
45static irqreturn_t pm860x_onkey_handler(int irq, void *data)
46{
47 struct pm860x_onkey_info *info = data;
48 int ret;
49
50 ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
51 ret &= ONKEY_STATUS;
52 input_report_key(info->idev, KEY_POWER, ret);
53 input_sync(info->idev);
54
55 /* Enable 8-second long onkey detection */
56 pm860x_set_bits(info->i2c, PM8607_WAKEUP, 3, LONG_ONKEY_EN);
57 return IRQ_HANDLED;
58}
59
60static int pm860x_onkey_probe(struct platform_device *pdev)
61{
62 struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
63 struct pm860x_onkey_info *info;
64 int irq, ret;
65
66 irq = platform_get_irq(pdev, 0);
67 if (irq < 0)
68 return -EINVAL;
69
70 info = devm_kzalloc(&pdev->dev, sizeof(struct pm860x_onkey_info),
71 GFP_KERNEL);
72 if (!info)
73 return -ENOMEM;
74 info->chip = chip;
75 info->i2c = (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
76 info->dev = &pdev->dev;
77 info->irq = irq;
78
79 info->idev = devm_input_allocate_device(&pdev->dev);
80 if (!info->idev) {
81 dev_err(chip->dev, "Failed to allocate input dev\n");
82 return -ENOMEM;
83 }
84
85 info->idev->name = "88pm860x_on";
86 info->idev->phys = "88pm860x_on/input0";
87 info->idev->id.bustype = BUS_I2C;
88 info->idev->dev.parent = &pdev->dev;
89 info->idev->evbit[0] = BIT_MASK(EV_KEY);
90 info->idev->keybit[BIT_WORD(KEY_POWER)] = BIT_MASK(KEY_POWER);
91
92 ret = input_register_device(info->idev);
93 if (ret) {
94 dev_err(chip->dev, "Can't register input device: %d\n", ret);
95 return ret;
96 }
97
98 ret = devm_request_threaded_irq(&pdev->dev, info->irq, NULL,
99 pm860x_onkey_handler, IRQF_ONESHOT,
100 "onkey", info);
101 if (ret < 0) {
102 dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
103 info->irq, ret);
104 return ret;
105 }
106
107 platform_set_drvdata(pdev, info);
108 device_init_wakeup(&pdev->dev, 1);
109
110 return 0;
111}
112
113static int __maybe_unused pm860x_onkey_suspend(struct device *dev)
114{
115 struct platform_device *pdev = to_platform_device(dev);
116 struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
117
118 if (device_may_wakeup(dev))
119 chip->wakeup_flag |= 1 << PM8607_IRQ_ONKEY;
120 return 0;
121}
122static int __maybe_unused pm860x_onkey_resume(struct device *dev)
123{
124 struct platform_device *pdev = to_platform_device(dev);
125 struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
126
127 if (device_may_wakeup(dev))
128 chip->wakeup_flag &= ~(1 << PM8607_IRQ_ONKEY);
129 return 0;
130}
131
132static SIMPLE_DEV_PM_OPS(pm860x_onkey_pm_ops, pm860x_onkey_suspend, pm860x_onkey_resume);
133
134static struct platform_driver pm860x_onkey_driver = {
135 .driver = {
136 .name = "88pm860x-onkey",
137 .pm = &pm860x_onkey_pm_ops,
138 },
139 .probe = pm860x_onkey_probe,
140};
141module_platform_driver(pm860x_onkey_driver);
142
143MODULE_DESCRIPTION("Marvell 88PM860x ONKEY driver");
144MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
145MODULE_LICENSE("GPL");