1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
// SPDX-License-Identifier: GPL-2.0
//
// Copyright (C) 2018 BayLibre SAS
// Author: Bartosz Golaszewski <bgolaszewski@baylibre.com>
//
// ONKEY driver for MAXIM 77650/77651 charger/power-supply.
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/mfd/max77650.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#define MAX77650_ONKEY_MODE_MASK BIT(3)
#define MAX77650_ONKEY_MODE_PUSH 0x00
#define MAX77650_ONKEY_MODE_SLIDE BIT(3)
struct max77650_onkey {
struct input_dev *input;
unsigned int code;
};
static irqreturn_t max77650_onkey_falling(int irq, void *data)
{
struct max77650_onkey *onkey = data;
input_report_key(onkey->input, onkey->code, 0);
input_sync(onkey->input);
return IRQ_HANDLED;
}
static irqreturn_t max77650_onkey_rising(int irq, void *data)
{
struct max77650_onkey *onkey = data;
input_report_key(onkey->input, onkey->code, 1);
input_sync(onkey->input);
return IRQ_HANDLED;
}
static int max77650_onkey_probe(struct platform_device *pdev)
{
int irq_r, irq_f, error, mode;
struct max77650_onkey *onkey;
struct device *dev, *parent;
struct regmap *map;
unsigned int type;
dev = &pdev->dev;
parent = dev->parent;
map = dev_get_regmap(parent, NULL);
if (!map)
return -ENODEV;
onkey = devm_kzalloc(dev, sizeof(*onkey), GFP_KERNEL);
if (!onkey)
return -ENOMEM;
error = device_property_read_u32(dev, "linux,code", &onkey->code);
if (error)
onkey->code = KEY_POWER;
if (device_property_read_bool(dev, "maxim,onkey-slide")) {
mode = MAX77650_ONKEY_MODE_SLIDE;
type = EV_SW;
} else {
mode = MAX77650_ONKEY_MODE_PUSH;
type = EV_KEY;
}
error = regmap_update_bits(map, MAX77650_REG_CNFG_GLBL,
MAX77650_ONKEY_MODE_MASK, mode);
if (error)
return error;
irq_f = platform_get_irq_byname(pdev, "nEN_F");
if (irq_f < 0)
return irq_f;
irq_r = platform_get_irq_byname(pdev, "nEN_R");
if (irq_r < 0)
return irq_r;
onkey->input = devm_input_allocate_device(dev);
if (!onkey->input)
return -ENOMEM;
onkey->input->name = "max77650_onkey";
onkey->input->phys = "max77650_onkey/input0";
onkey->input->id.bustype = BUS_I2C;
input_set_capability(onkey->input, type, onkey->code);
error = devm_request_any_context_irq(dev, irq_f, max77650_onkey_falling,
IRQF_ONESHOT, "onkey-down", onkey);
if (error < 0)
return error;
error = devm_request_any_context_irq(dev, irq_r, max77650_onkey_rising,
IRQF_ONESHOT, "onkey-up", onkey);
if (error < 0)
return error;
return input_register_device(onkey->input);
}
static const struct of_device_id max77650_onkey_of_match[] = {
{ .compatible = "maxim,max77650-onkey" },
{ }
};
MODULE_DEVICE_TABLE(of, max77650_onkey_of_match);
static struct platform_driver max77650_onkey_driver = {
.driver = {
.name = "max77650-onkey",
.of_match_table = max77650_onkey_of_match,
},
.probe = max77650_onkey_probe,
};
module_platform_driver(max77650_onkey_driver);
MODULE_DESCRIPTION("MAXIM 77650/77651 ONKEY driver");
MODULE_AUTHOR("Bartosz Golaszewski <bgolaszewski@baylibre.com>");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:max77650-onkey");