1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun //
3*4882a593Smuzhiyun // Copyright (C) 2018 BayLibre SAS
4*4882a593Smuzhiyun // Author: Bartosz Golaszewski <bgolaszewski@baylibre.com>
5*4882a593Smuzhiyun //
6*4882a593Smuzhiyun // ONKEY driver for MAXIM 77650/77651 charger/power-supply.
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <linux/i2c.h>
9*4882a593Smuzhiyun #include <linux/input.h>
10*4882a593Smuzhiyun #include <linux/interrupt.h>
11*4882a593Smuzhiyun #include <linux/mfd/max77650.h>
12*4882a593Smuzhiyun #include <linux/module.h>
13*4882a593Smuzhiyun #include <linux/platform_device.h>
14*4882a593Smuzhiyun #include <linux/regmap.h>
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun #define MAX77650_ONKEY_MODE_MASK BIT(3)
17*4882a593Smuzhiyun #define MAX77650_ONKEY_MODE_PUSH 0x00
18*4882a593Smuzhiyun #define MAX77650_ONKEY_MODE_SLIDE BIT(3)
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun struct max77650_onkey {
21*4882a593Smuzhiyun struct input_dev *input;
22*4882a593Smuzhiyun unsigned int code;
23*4882a593Smuzhiyun };
24*4882a593Smuzhiyun
max77650_onkey_falling(int irq,void * data)25*4882a593Smuzhiyun static irqreturn_t max77650_onkey_falling(int irq, void *data)
26*4882a593Smuzhiyun {
27*4882a593Smuzhiyun struct max77650_onkey *onkey = data;
28*4882a593Smuzhiyun
29*4882a593Smuzhiyun input_report_key(onkey->input, onkey->code, 0);
30*4882a593Smuzhiyun input_sync(onkey->input);
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun return IRQ_HANDLED;
33*4882a593Smuzhiyun }
34*4882a593Smuzhiyun
max77650_onkey_rising(int irq,void * data)35*4882a593Smuzhiyun static irqreturn_t max77650_onkey_rising(int irq, void *data)
36*4882a593Smuzhiyun {
37*4882a593Smuzhiyun struct max77650_onkey *onkey = data;
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun input_report_key(onkey->input, onkey->code, 1);
40*4882a593Smuzhiyun input_sync(onkey->input);
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun return IRQ_HANDLED;
43*4882a593Smuzhiyun }
44*4882a593Smuzhiyun
max77650_onkey_probe(struct platform_device * pdev)45*4882a593Smuzhiyun static int max77650_onkey_probe(struct platform_device *pdev)
46*4882a593Smuzhiyun {
47*4882a593Smuzhiyun int irq_r, irq_f, error, mode;
48*4882a593Smuzhiyun struct max77650_onkey *onkey;
49*4882a593Smuzhiyun struct device *dev, *parent;
50*4882a593Smuzhiyun struct regmap *map;
51*4882a593Smuzhiyun unsigned int type;
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun dev = &pdev->dev;
54*4882a593Smuzhiyun parent = dev->parent;
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun map = dev_get_regmap(parent, NULL);
57*4882a593Smuzhiyun if (!map)
58*4882a593Smuzhiyun return -ENODEV;
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun onkey = devm_kzalloc(dev, sizeof(*onkey), GFP_KERNEL);
61*4882a593Smuzhiyun if (!onkey)
62*4882a593Smuzhiyun return -ENOMEM;
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun error = device_property_read_u32(dev, "linux,code", &onkey->code);
65*4882a593Smuzhiyun if (error)
66*4882a593Smuzhiyun onkey->code = KEY_POWER;
67*4882a593Smuzhiyun
68*4882a593Smuzhiyun if (device_property_read_bool(dev, "maxim,onkey-slide")) {
69*4882a593Smuzhiyun mode = MAX77650_ONKEY_MODE_SLIDE;
70*4882a593Smuzhiyun type = EV_SW;
71*4882a593Smuzhiyun } else {
72*4882a593Smuzhiyun mode = MAX77650_ONKEY_MODE_PUSH;
73*4882a593Smuzhiyun type = EV_KEY;
74*4882a593Smuzhiyun }
75*4882a593Smuzhiyun
76*4882a593Smuzhiyun error = regmap_update_bits(map, MAX77650_REG_CNFG_GLBL,
77*4882a593Smuzhiyun MAX77650_ONKEY_MODE_MASK, mode);
78*4882a593Smuzhiyun if (error)
79*4882a593Smuzhiyun return error;
80*4882a593Smuzhiyun
81*4882a593Smuzhiyun irq_f = platform_get_irq_byname(pdev, "nEN_F");
82*4882a593Smuzhiyun if (irq_f < 0)
83*4882a593Smuzhiyun return irq_f;
84*4882a593Smuzhiyun
85*4882a593Smuzhiyun irq_r = platform_get_irq_byname(pdev, "nEN_R");
86*4882a593Smuzhiyun if (irq_r < 0)
87*4882a593Smuzhiyun return irq_r;
88*4882a593Smuzhiyun
89*4882a593Smuzhiyun onkey->input = devm_input_allocate_device(dev);
90*4882a593Smuzhiyun if (!onkey->input)
91*4882a593Smuzhiyun return -ENOMEM;
92*4882a593Smuzhiyun
93*4882a593Smuzhiyun onkey->input->name = "max77650_onkey";
94*4882a593Smuzhiyun onkey->input->phys = "max77650_onkey/input0";
95*4882a593Smuzhiyun onkey->input->id.bustype = BUS_I2C;
96*4882a593Smuzhiyun input_set_capability(onkey->input, type, onkey->code);
97*4882a593Smuzhiyun
98*4882a593Smuzhiyun error = devm_request_any_context_irq(dev, irq_f, max77650_onkey_falling,
99*4882a593Smuzhiyun IRQF_ONESHOT, "onkey-down", onkey);
100*4882a593Smuzhiyun if (error < 0)
101*4882a593Smuzhiyun return error;
102*4882a593Smuzhiyun
103*4882a593Smuzhiyun error = devm_request_any_context_irq(dev, irq_r, max77650_onkey_rising,
104*4882a593Smuzhiyun IRQF_ONESHOT, "onkey-up", onkey);
105*4882a593Smuzhiyun if (error < 0)
106*4882a593Smuzhiyun return error;
107*4882a593Smuzhiyun
108*4882a593Smuzhiyun return input_register_device(onkey->input);
109*4882a593Smuzhiyun }
110*4882a593Smuzhiyun
111*4882a593Smuzhiyun static const struct of_device_id max77650_onkey_of_match[] = {
112*4882a593Smuzhiyun { .compatible = "maxim,max77650-onkey" },
113*4882a593Smuzhiyun { }
114*4882a593Smuzhiyun };
115*4882a593Smuzhiyun MODULE_DEVICE_TABLE(of, max77650_onkey_of_match);
116*4882a593Smuzhiyun
117*4882a593Smuzhiyun static struct platform_driver max77650_onkey_driver = {
118*4882a593Smuzhiyun .driver = {
119*4882a593Smuzhiyun .name = "max77650-onkey",
120*4882a593Smuzhiyun .of_match_table = max77650_onkey_of_match,
121*4882a593Smuzhiyun },
122*4882a593Smuzhiyun .probe = max77650_onkey_probe,
123*4882a593Smuzhiyun };
124*4882a593Smuzhiyun module_platform_driver(max77650_onkey_driver);
125*4882a593Smuzhiyun
126*4882a593Smuzhiyun MODULE_DESCRIPTION("MAXIM 77650/77651 ONKEY driver");
127*4882a593Smuzhiyun MODULE_AUTHOR("Bartosz Golaszewski <bgolaszewski@baylibre.com>");
128*4882a593Smuzhiyun MODULE_LICENSE("GPL v2");
129*4882a593Smuzhiyun MODULE_ALIAS("platform:max77650-onkey");
130