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
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
|
// SPDX-License-Identifier: GPL-2.0+
/*
* Core support for ATC260x PMICs
*
* Copyright (C) 2019 Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
* Copyright (C) 2020 Cristian Ciocaltea <cristian.ciocaltea@gmail.com>
*/
#include <linux/interrupt.h>
#include <linux/mfd/atc260x/core.h>
#include <linux/mfd/core.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regmap.h>
#define ATC260X_CHIP_REV_MAX 31
struct atc260x_init_regs {
unsigned int cmu_devrst;
unsigned int cmu_devrst_ints;
unsigned int ints_msk;
unsigned int pad_en;
unsigned int pad_en_extirq;
};
static void regmap_lock_mutex(void *__mutex)
{
struct mutex *mutex = __mutex;
/*
* Using regmap within an atomic context (e.g. accessing a PMIC when
* powering system down) is normally allowed only if the regmap type
* is MMIO and the regcache type is either REGCACHE_NONE or
* REGCACHE_FLAT. For slow buses like I2C and SPI, the regmap is
* internally protected by a mutex which is acquired non-atomically.
*
* Let's improve this by using a customized locking scheme inspired
* from I2C atomic transfer. See i2c_in_atomic_xfer_mode() for a
* starting point.
*/
if (system_state > SYSTEM_RUNNING && irqs_disabled())
mutex_trylock(mutex);
else
mutex_lock(mutex);
}
static void regmap_unlock_mutex(void *__mutex)
{
struct mutex *mutex = __mutex;
mutex_unlock(mutex);
}
static const struct regmap_config atc2603c_regmap_config = {
.reg_bits = 8,
.val_bits = 16,
.max_register = ATC2603C_SADDR,
.cache_type = REGCACHE_NONE,
};
static const struct regmap_config atc2609a_regmap_config = {
.reg_bits = 8,
.val_bits = 16,
.max_register = ATC2609A_SADDR,
.cache_type = REGCACHE_NONE,
};
static const struct regmap_irq atc2603c_regmap_irqs[] = {
REGMAP_IRQ_REG(ATC2603C_IRQ_AUDIO, 0, ATC2603C_INTS_MSK_AUDIO),
REGMAP_IRQ_REG(ATC2603C_IRQ_OV, 0, ATC2603C_INTS_MSK_OV),
REGMAP_IRQ_REG(ATC2603C_IRQ_OC, 0, ATC2603C_INTS_MSK_OC),
REGMAP_IRQ_REG(ATC2603C_IRQ_OT, 0, ATC2603C_INTS_MSK_OT),
REGMAP_IRQ_REG(ATC2603C_IRQ_UV, 0, ATC2603C_INTS_MSK_UV),
REGMAP_IRQ_REG(ATC2603C_IRQ_ALARM, 0, ATC2603C_INTS_MSK_ALARM),
REGMAP_IRQ_REG(ATC2603C_IRQ_ONOFF, 0, ATC2603C_INTS_MSK_ONOFF),
REGMAP_IRQ_REG(ATC2603C_IRQ_SGPIO, 0, ATC2603C_INTS_MSK_SGPIO),
REGMAP_IRQ_REG(ATC2603C_IRQ_IR, 0, ATC2603C_INTS_MSK_IR),
REGMAP_IRQ_REG(ATC2603C_IRQ_REMCON, 0, ATC2603C_INTS_MSK_REMCON),
REGMAP_IRQ_REG(ATC2603C_IRQ_POWER_IN, 0, ATC2603C_INTS_MSK_POWERIN),
};
static const struct regmap_irq atc2609a_regmap_irqs[] = {
REGMAP_IRQ_REG(ATC2609A_IRQ_AUDIO, 0, ATC2609A_INTS_MSK_AUDIO),
REGMAP_IRQ_REG(ATC2609A_IRQ_OV, 0, ATC2609A_INTS_MSK_OV),
REGMAP_IRQ_REG(ATC2609A_IRQ_OC, 0, ATC2609A_INTS_MSK_OC),
REGMAP_IRQ_REG(ATC2609A_IRQ_OT, 0, ATC2609A_INTS_MSK_OT),
REGMAP_IRQ_REG(ATC2609A_IRQ_UV, 0, ATC2609A_INTS_MSK_UV),
REGMAP_IRQ_REG(ATC2609A_IRQ_ALARM, 0, ATC2609A_INTS_MSK_ALARM),
REGMAP_IRQ_REG(ATC2609A_IRQ_ONOFF, 0, ATC2609A_INTS_MSK_ONOFF),
REGMAP_IRQ_REG(ATC2609A_IRQ_WKUP, 0, ATC2609A_INTS_MSK_WKUP),
REGMAP_IRQ_REG(ATC2609A_IRQ_IR, 0, ATC2609A_INTS_MSK_IR),
REGMAP_IRQ_REG(ATC2609A_IRQ_REMCON, 0, ATC2609A_INTS_MSK_REMCON),
REGMAP_IRQ_REG(ATC2609A_IRQ_POWER_IN, 0, ATC2609A_INTS_MSK_POWERIN),
};
static const struct regmap_irq_chip atc2603c_regmap_irq_chip = {
.name = "atc2603c",
.irqs = atc2603c_regmap_irqs,
.num_irqs = ARRAY_SIZE(atc2603c_regmap_irqs),
.num_regs = 1,
.status_base = ATC2603C_INTS_PD,
.unmask_base = ATC2603C_INTS_MSK,
};
static const struct regmap_irq_chip atc2609a_regmap_irq_chip = {
.name = "atc2609a",
.irqs = atc2609a_regmap_irqs,
.num_irqs = ARRAY_SIZE(atc2609a_regmap_irqs),
.num_regs = 1,
.status_base = ATC2609A_INTS_PD,
.unmask_base = ATC2609A_INTS_MSK,
};
static const struct resource atc2603c_onkey_resources[] = {
DEFINE_RES_IRQ(ATC2603C_IRQ_ONOFF),
};
static const struct resource atc2609a_onkey_resources[] = {
DEFINE_RES_IRQ(ATC2609A_IRQ_ONOFF),
};
static const struct mfd_cell atc2603c_mfd_cells[] = {
{ .name = "atc260x-regulator" },
{ .name = "atc260x-pwrc" },
{
.name = "atc260x-onkey",
.num_resources = ARRAY_SIZE(atc2603c_onkey_resources),
.resources = atc2603c_onkey_resources,
},
};
static const struct mfd_cell atc2609a_mfd_cells[] = {
{ .name = "atc260x-regulator" },
{ .name = "atc260x-pwrc" },
{
.name = "atc260x-onkey",
.num_resources = ARRAY_SIZE(atc2609a_onkey_resources),
.resources = atc2609a_onkey_resources,
},
};
static const struct atc260x_init_regs atc2603c_init_regs = {
.cmu_devrst = ATC2603C_CMU_DEVRST,
.cmu_devrst_ints = ATC2603C_CMU_DEVRST_INTS,
.ints_msk = ATC2603C_INTS_MSK,
.pad_en = ATC2603C_PAD_EN,
.pad_en_extirq = ATC2603C_PAD_EN_EXTIRQ,
};
static const struct atc260x_init_regs atc2609a_init_regs = {
.cmu_devrst = ATC2609A_CMU_DEVRST,
.cmu_devrst_ints = ATC2609A_CMU_DEVRST_INTS,
.ints_msk = ATC2609A_INTS_MSK,
.pad_en = ATC2609A_PAD_EN,
.pad_en_extirq = ATC2609A_PAD_EN_EXTIRQ,
};
static void atc260x_cmu_reset(struct atc260x *atc260x)
{
const struct atc260x_init_regs *regs = atc260x->init_regs;
/* Assert reset */
regmap_update_bits(atc260x->regmap, regs->cmu_devrst,
regs->cmu_devrst_ints, ~regs->cmu_devrst_ints);
/* De-assert reset */
regmap_update_bits(atc260x->regmap, regs->cmu_devrst,
regs->cmu_devrst_ints, regs->cmu_devrst_ints);
}
static void atc260x_dev_init(struct atc260x *atc260x)
{
const struct atc260x_init_regs *regs = atc260x->init_regs;
/* Initialize interrupt block */
atc260x_cmu_reset(atc260x);
/* Disable all interrupt sources */
regmap_write(atc260x->regmap, regs->ints_msk, 0);
/* Enable EXTIRQ pad */
regmap_update_bits(atc260x->regmap, regs->pad_en,
regs->pad_en_extirq, regs->pad_en_extirq);
}
/**
* atc260x_match_device(): Setup ATC260x variant related fields
*
* @atc260x: ATC260x device to setup (.dev field must be set)
* @regmap_cfg: regmap config associated with this ATC260x device
*
* This lets the ATC260x core configure the MFD cells and register maps
* for later use.
*/
int atc260x_match_device(struct atc260x *atc260x, struct regmap_config *regmap_cfg)
{
struct device *dev = atc260x->dev;
const void *of_data;
of_data = of_device_get_match_data(dev);
if (!of_data)
return -ENODEV;
atc260x->ic_type = (unsigned long)of_data;
switch (atc260x->ic_type) {
case ATC2603C:
*regmap_cfg = atc2603c_regmap_config;
atc260x->regmap_irq_chip = &atc2603c_regmap_irq_chip;
atc260x->cells = atc2603c_mfd_cells;
atc260x->nr_cells = ARRAY_SIZE(atc2603c_mfd_cells);
atc260x->type_name = "atc2603c";
atc260x->rev_reg = ATC2603C_CHIP_VER;
atc260x->init_regs = &atc2603c_init_regs;
break;
case ATC2609A:
*regmap_cfg = atc2609a_regmap_config;
atc260x->regmap_irq_chip = &atc2609a_regmap_irq_chip;
atc260x->cells = atc2609a_mfd_cells;
atc260x->nr_cells = ARRAY_SIZE(atc2609a_mfd_cells);
atc260x->type_name = "atc2609a";
atc260x->rev_reg = ATC2609A_CHIP_VER;
atc260x->init_regs = &atc2609a_init_regs;
break;
default:
dev_err(dev, "Unsupported ATC260x device type: %u\n",
atc260x->ic_type);
return -EINVAL;
}
atc260x->regmap_mutex = devm_kzalloc(dev, sizeof(*atc260x->regmap_mutex),
GFP_KERNEL);
if (!atc260x->regmap_mutex)
return -ENOMEM;
mutex_init(atc260x->regmap_mutex);
regmap_cfg->lock = regmap_lock_mutex,
regmap_cfg->unlock = regmap_unlock_mutex,
regmap_cfg->lock_arg = atc260x->regmap_mutex;
return 0;
}
EXPORT_SYMBOL_GPL(atc260x_match_device);
/**
* atc260x_device_probe(): Probe a configured ATC260x device
*
* @atc260x: ATC260x device to probe (must be configured)
*
* This function lets the ATC260x core register the ATC260x MFD devices
* and IRQCHIP. The ATC260x device passed in must be fully configured
* with atc260x_match_device, its IRQ set, and regmap created.
*/
int atc260x_device_probe(struct atc260x *atc260x)
{
struct device *dev = atc260x->dev;
unsigned int chip_rev;
int ret;
if (!atc260x->irq) {
dev_err(dev, "No interrupt support\n");
return -EINVAL;
}
/* Initialize the hardware */
atc260x_dev_init(atc260x);
ret = regmap_read(atc260x->regmap, atc260x->rev_reg, &chip_rev);
if (ret) {
dev_err(dev, "Failed to get chip revision\n");
return ret;
}
if (chip_rev > ATC260X_CHIP_REV_MAX) {
dev_err(dev, "Unknown chip revision: %u\n", chip_rev);
return -EINVAL;
}
atc260x->ic_ver = __ffs(chip_rev + 1U);
dev_info(dev, "Detected chip type %s rev.%c\n",
atc260x->type_name, 'A' + atc260x->ic_ver);
ret = devm_regmap_add_irq_chip(dev, atc260x->regmap, atc260x->irq, IRQF_ONESHOT,
-1, atc260x->regmap_irq_chip, &atc260x->irq_data);
if (ret) {
dev_err(dev, "Failed to add IRQ chip: %d\n", ret);
return ret;
}
ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE,
atc260x->cells, atc260x->nr_cells, NULL, 0,
regmap_irq_get_domain(atc260x->irq_data));
if (ret) {
dev_err(dev, "Failed to add child devices: %d\n", ret);
regmap_del_irq_chip(atc260x->irq, atc260x->irq_data);
}
return ret;
}
EXPORT_SYMBOL_GPL(atc260x_device_probe);
MODULE_DESCRIPTION("ATC260x PMICs Core support");
MODULE_AUTHOR("Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>");
MODULE_AUTHOR("Cristian Ciocaltea <cristian.ciocaltea@gmail.com>");
MODULE_LICENSE("GPL");
|
