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
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* OnKey device driver for DA9063, DA9062 and DA9061 PMICs
* Copyright (C) 2015 Dialog Semiconductor Ltd.
*/
#include <linux/devm-helpers.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/workqueue.h>
#include <linux/regmap.h>
#include <linux/of.h>
#include <linux/mfd/da9063/core.h>
#include <linux/mfd/da9063/registers.h>
#include <linux/mfd/da9062/core.h>
#include <linux/mfd/da9062/registers.h>
struct da906x_chip_config {
/* REGS */
int onkey_status;
int onkey_pwr_signalling;
int onkey_fault_log;
int onkey_shutdown;
/* MASKS */
int onkey_nonkey_mask;
int onkey_nonkey_lock_mask;
int onkey_key_reset_mask;
int onkey_shutdown_mask;
/* NAMES */
const char *name;
};
struct da9063_onkey {
struct delayed_work work;
struct input_dev *input;
struct device *dev;
struct regmap *regmap;
const struct da906x_chip_config *config;
char phys[32];
bool key_power;
};
static const struct da906x_chip_config da9063_regs = {
/* REGS */
.onkey_status = DA9063_REG_STATUS_A,
.onkey_pwr_signalling = DA9063_REG_CONTROL_B,
.onkey_fault_log = DA9063_REG_FAULT_LOG,
.onkey_shutdown = DA9063_REG_CONTROL_F,
/* MASKS */
.onkey_nonkey_mask = DA9063_NONKEY,
.onkey_nonkey_lock_mask = DA9063_NONKEY_LOCK,
.onkey_key_reset_mask = DA9063_KEY_RESET,
.onkey_shutdown_mask = DA9063_SHUTDOWN,
/* NAMES */
.name = DA9063_DRVNAME_ONKEY,
};
static const struct da906x_chip_config da9062_regs = {
/* REGS */
.onkey_status = DA9062AA_STATUS_A,
.onkey_pwr_signalling = DA9062AA_CONTROL_B,
.onkey_fault_log = DA9062AA_FAULT_LOG,
.onkey_shutdown = DA9062AA_CONTROL_F,
/* MASKS */
.onkey_nonkey_mask = DA9062AA_NONKEY_MASK,
.onkey_nonkey_lock_mask = DA9062AA_NONKEY_LOCK_MASK,
.onkey_key_reset_mask = DA9062AA_KEY_RESET_MASK,
.onkey_shutdown_mask = DA9062AA_SHUTDOWN_MASK,
/* NAMES */
.name = "da9062-onkey",
};
static const struct of_device_id da9063_compatible_reg_id_table[] = {
{ .compatible = "dlg,da9063-onkey", .data = &da9063_regs },
{ .compatible = "dlg,da9062-onkey", .data = &da9062_regs },
{ },
};
MODULE_DEVICE_TABLE(of, da9063_compatible_reg_id_table);
static void da9063_poll_on(struct work_struct *work)
{
struct da9063_onkey *onkey = container_of(work,
struct da9063_onkey,
work.work);
const struct da906x_chip_config *config = onkey->config;
unsigned int val;
int fault_log = 0;
bool poll = true;
int error;
/* Poll to see when the pin is released */
error = regmap_read(onkey->regmap,
config->onkey_status,
&val);
if (error) {
dev_err(onkey->dev,
"Failed to read ON status: %d\n", error);
goto err_poll;
}
if (!(val & config->onkey_nonkey_mask)) {
error = regmap_update_bits(onkey->regmap,
config->onkey_pwr_signalling,
config->onkey_nonkey_lock_mask,
0);
if (error) {
dev_err(onkey->dev,
"Failed to reset the Key Delay %d\n", error);
goto err_poll;
}
input_report_key(onkey->input, KEY_POWER, 0);
input_sync(onkey->input);
poll = false;
}
/*
* If the fault log KEY_RESET is detected, then clear it
* and shut down the system.
*/
error = regmap_read(onkey->regmap,
config->onkey_fault_log,
&fault_log);
if (error) {
dev_warn(&onkey->input->dev,
"Cannot read FAULT_LOG: %d\n", error);
} else if (fault_log & config->onkey_key_reset_mask) {
error = regmap_write(onkey->regmap,
config->onkey_fault_log,
config->onkey_key_reset_mask);
if (error) {
dev_warn(&onkey->input->dev,
"Cannot reset KEY_RESET fault log: %d\n",
error);
} else {
/* at this point we do any S/W housekeeping
* and then send shutdown command
*/
dev_dbg(&onkey->input->dev,
"Sending SHUTDOWN to PMIC ...\n");
error = regmap_write(onkey->regmap,
config->onkey_shutdown,
config->onkey_shutdown_mask);
if (error)
dev_err(&onkey->input->dev,
"Cannot SHUTDOWN PMIC: %d\n",
error);
}
}
err_poll:
if (poll)
schedule_delayed_work(&onkey->work, msecs_to_jiffies(50));
}
static irqreturn_t da9063_onkey_irq_handler(int irq, void *data)
{
struct da9063_onkey *onkey = data;
const struct da906x_chip_config *config = onkey->config;
unsigned int val;
int error;
error = regmap_read(onkey->regmap,
config->onkey_status,
&val);
if (onkey->key_power && !error && (val & config->onkey_nonkey_mask)) {
input_report_key(onkey->input, KEY_POWER, 1);
input_sync(onkey->input);
schedule_delayed_work(&onkey->work, 0);
dev_dbg(onkey->dev, "KEY_POWER long press.\n");
} else {
input_report_key(onkey->input, KEY_POWER, 1);
input_sync(onkey->input);
input_report_key(onkey->input, KEY_POWER, 0);
input_sync(onkey->input);
dev_dbg(onkey->dev, "KEY_POWER short press.\n");
}
return IRQ_HANDLED;
}
static int da9063_onkey_probe(struct platform_device *pdev)
{
struct da9063_onkey *onkey;
const struct of_device_id *match;
int irq;
int error;
match = of_match_node(da9063_compatible_reg_id_table,
pdev->dev.of_node);
if (!match)
return -ENXIO;
onkey = devm_kzalloc(&pdev->dev, sizeof(struct da9063_onkey),
GFP_KERNEL);
if (!onkey) {
dev_err(&pdev->dev, "Failed to allocate memory.\n");
return -ENOMEM;
}
onkey->config = match->data;
onkey->dev = &pdev->dev;
onkey->regmap = dev_get_regmap(pdev->dev.parent, NULL);
if (!onkey->regmap) {
dev_err(&pdev->dev, "Parent regmap unavailable.\n");
return -ENXIO;
}
onkey->key_power = !of_property_read_bool(pdev->dev.of_node,
"dlg,disable-key-power");
onkey->input = devm_input_allocate_device(&pdev->dev);
if (!onkey->input) {
dev_err(&pdev->dev, "Failed to allocated input device.\n");
return -ENOMEM;
}
onkey->input->name = onkey->config->name;
snprintf(onkey->phys, sizeof(onkey->phys), "%s/input0",
onkey->config->name);
onkey->input->phys = onkey->phys;
onkey->input->dev.parent = &pdev->dev;
input_set_capability(onkey->input, EV_KEY, KEY_POWER);
error = devm_delayed_work_autocancel(&pdev->dev, &onkey->work,
da9063_poll_on);
if (error) {
dev_err(&pdev->dev,
"Failed to add cancel poll action: %d\n",
error);
return error;
}
irq = platform_get_irq_byname(pdev, "ONKEY");
if (irq < 0)
return irq;
error = devm_request_threaded_irq(&pdev->dev, irq,
NULL, da9063_onkey_irq_handler,
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
"ONKEY", onkey);
if (error) {
dev_err(&pdev->dev,
"Failed to request IRQ %d: %d\n", irq, error);
return error;
}
error = input_register_device(onkey->input);
if (error) {
dev_err(&pdev->dev,
"Failed to register input device: %d\n", error);
return error;
}
return 0;
}
static struct platform_driver da9063_onkey_driver = {
.probe = da9063_onkey_probe,
.driver = {
.name = DA9063_DRVNAME_ONKEY,
.of_match_table = da9063_compatible_reg_id_table,
},
};
module_platform_driver(da9063_onkey_driver);
MODULE_AUTHOR("S Twiss <stwiss.opensource@diasemi.com>");
MODULE_DESCRIPTION("Onkey device driver for Dialog DA9063, DA9062 and DA9061");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" DA9063_DRVNAME_ONKEY);
|
