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
|
/*
* Arizona interrupt support
*
* Copyright 2012 Wolfson Microelectronics plc
*
* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <linux/mfd/arizona/core.h>
#include <linux/mfd/arizona/registers.h>
#include "arizona.h"
static int arizona_map_irq(struct arizona *arizona, int irq)
{
int ret;
ret = regmap_irq_get_virq(arizona->aod_irq_chip, irq);
if (ret < 0)
ret = regmap_irq_get_virq(arizona->irq_chip, irq);
return ret;
}
int arizona_request_irq(struct arizona *arizona, int irq, char *name,
irq_handler_t handler, void *data)
{
irq = arizona_map_irq(arizona, irq);
if (irq < 0)
return irq;
return request_threaded_irq(irq, NULL, handler, IRQF_ONESHOT,
name, data);
}
EXPORT_SYMBOL_GPL(arizona_request_irq);
void arizona_free_irq(struct arizona *arizona, int irq, void *data)
{
irq = arizona_map_irq(arizona, irq);
if (irq < 0)
return;
free_irq(irq, data);
}
EXPORT_SYMBOL_GPL(arizona_free_irq);
int arizona_set_irq_wake(struct arizona *arizona, int irq, int on)
{
irq = arizona_map_irq(arizona, irq);
if (irq < 0)
return irq;
return irq_set_irq_wake(irq, on);
}
EXPORT_SYMBOL_GPL(arizona_set_irq_wake);
static irqreturn_t arizona_boot_done(int irq, void *data)
{
struct arizona *arizona = data;
dev_dbg(arizona->dev, "Boot done\n");
return IRQ_HANDLED;
}
static irqreturn_t arizona_ctrlif_err(int irq, void *data)
{
struct arizona *arizona = data;
/*
* For pretty much all potential sources a register cache sync
* won't help, we've just got a software bug somewhere.
*/
dev_err(arizona->dev, "Control interface error\n");
return IRQ_HANDLED;
}
static irqreturn_t arizona_irq_thread(int irq, void *data)
{
struct arizona *arizona = data;
int i, ret;
ret = pm_runtime_get_sync(arizona->dev);
if (ret < 0) {
dev_err(arizona->dev, "Failed to resume device: %d\n", ret);
return IRQ_NONE;
}
/* Check both domains */
for (i = 0; i < 2; i++)
handle_nested_irq(irq_find_mapping(arizona->virq, i));
pm_runtime_mark_last_busy(arizona->dev);
pm_runtime_put_autosuspend(arizona->dev);
return IRQ_HANDLED;
}
static void arizona_irq_enable(struct irq_data *data)
{
}
static void arizona_irq_disable(struct irq_data *data)
{
}
static struct irq_chip arizona_irq_chip = {
.name = "arizona",
.irq_disable = arizona_irq_disable,
.irq_enable = arizona_irq_enable,
};
static int arizona_irq_map(struct irq_domain *h, unsigned int virq,
irq_hw_number_t hw)
{
struct regmap_irq_chip_data *data = h->host_data;
irq_set_chip_data(virq, data);
irq_set_chip_and_handler(virq, &arizona_irq_chip, handle_edge_irq);
irq_set_nested_thread(virq, 1);
/* ARM needs us to explicitly flag the IRQ as valid
* and will set them noprobe when we do so. */
#ifdef CONFIG_ARM
set_irq_flags(virq, IRQF_VALID);
#else
irq_set_noprobe(virq);
#endif
return 0;
}
static struct irq_domain_ops arizona_domain_ops = {
.map = arizona_irq_map,
.xlate = irq_domain_xlate_twocell,
};
int arizona_irq_init(struct arizona *arizona)
{
int flags = IRQF_ONESHOT;
int ret, i;
const struct regmap_irq_chip *aod, *irq;
switch (arizona->type) {
#ifdef CONFIG_MFD_WM5102
case WM5102:
aod = &wm5102_aod;
irq = &wm5102_irq;
break;
#endif
#ifdef CONFIG_MFD_WM5110
case WM5110:
aod = &wm5110_aod;
irq = &wm5110_irq;
break;
#endif
default:
BUG_ON("Unknown Arizona class device" == NULL);
return -EINVAL;
}
if (arizona->pdata.irq_active_high) {
ret = regmap_update_bits(arizona->regmap, ARIZONA_IRQ_CTRL_1,
ARIZONA_IRQ_POL, 0);
if (ret != 0) {
dev_err(arizona->dev, "Couldn't set IRQ polarity: %d\n",
ret);
goto err;
}
flags |= IRQF_TRIGGER_HIGH;
} else {
flags |= IRQF_TRIGGER_LOW;
}
/* Allocate a virtual IRQ domain to distribute to the regmap domains */
arizona->virq = irq_domain_add_linear(NULL, 2, &arizona_domain_ops,
arizona);
if (!arizona->virq) {
ret = -EINVAL;
goto err;
}
ret = regmap_add_irq_chip(arizona->regmap,
irq_create_mapping(arizona->virq, 0),
IRQF_ONESHOT, -1, aod,
&arizona->aod_irq_chip);
if (ret != 0) {
dev_err(arizona->dev, "Failed to add AOD IRQs: %d\n", ret);
goto err_domain;
}
ret = regmap_add_irq_chip(arizona->regmap,
irq_create_mapping(arizona->virq, 1),
IRQF_ONESHOT, -1, irq,
&arizona->irq_chip);
if (ret != 0) {
dev_err(arizona->dev, "Failed to add AOD IRQs: %d\n", ret);
goto err_aod;
}
/* Make sure the boot done IRQ is unmasked for resumes */
i = arizona_map_irq(arizona, ARIZONA_IRQ_BOOT_DONE);
ret = request_threaded_irq(i, NULL, arizona_boot_done, IRQF_ONESHOT,
"Boot done", arizona);
if (ret != 0) {
dev_err(arizona->dev, "Failed to request boot done %d: %d\n",
arizona->irq, ret);
goto err_boot_done;
}
/* Handle control interface errors in the core */
i = arizona_map_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR);
ret = request_threaded_irq(i, NULL, arizona_ctrlif_err, IRQF_ONESHOT,
"Control interface error", arizona);
if (ret != 0) {
dev_err(arizona->dev, "Failed to request boot done %d: %d\n",
arizona->irq, ret);
goto err_ctrlif;
}
ret = request_threaded_irq(arizona->irq, NULL, arizona_irq_thread,
flags, "arizona", arizona);
if (ret != 0) {
dev_err(arizona->dev, "Failed to request IRQ %d: %d\n",
arizona->irq, ret);
goto err_main_irq;
}
return 0;
err_main_irq:
free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR), arizona);
err_ctrlif:
free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_BOOT_DONE), arizona);
err_boot_done:
regmap_del_irq_chip(irq_create_mapping(arizona->virq, 1),
arizona->irq_chip);
err_aod:
regmap_del_irq_chip(irq_create_mapping(arizona->virq, 0),
arizona->aod_irq_chip);
err_domain:
err:
return ret;
}
int arizona_irq_exit(struct arizona *arizona)
{
free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_CTRLIF_ERR), arizona);
free_irq(arizona_map_irq(arizona, ARIZONA_IRQ_BOOT_DONE), arizona);
regmap_del_irq_chip(irq_create_mapping(arizona->virq, 1),
arizona->irq_chip);
regmap_del_irq_chip(irq_create_mapping(arizona->virq, 0),
arizona->aod_irq_chip);
free_irq(arizona->irq, arizona);
return 0;
}
|
