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
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Device driver for RT5739 regulator
*
* Copyright (C) 2023 Richtek Technology Corp.
*
* Author: ChiYuan Huang <cy_huang@richtek.com>
*/
#include <linux/bits.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/kernel.h>
#include <linux/mod_devicetable.h>
#include <linux/property.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/of_regulator.h>
#define RT5739_AUTO_MODE 0
#define RT5739_FPWM_MODE 1
#define RT5739_REG_NSEL0 0x00
#define RT5739_REG_NSEL1 0x01
#define RT5739_REG_CNTL1 0x02
#define RT5739_REG_ID1 0x03
#define RT5739_REG_CNTL2 0x06
#define RT5739_REG_CNTL4 0x08
#define RT5739_VSEL_MASK GENMASK(7, 0)
#define RT5739_MODEVSEL1_MASK BIT(1)
#define RT5739_MODEVSEL0_MASK BIT(0)
#define RT5739_VID_MASK GENMASK(7, 5)
#define RT5739_ACTD_MASK BIT(7)
#define RT5739_ENVSEL1_MASK BIT(1)
#define RT5739_ENVSEL0_MASK BIT(0)
#define RT5739_VOLT_MINUV 300000
#define RT5739_VOLT_MAXUV 1300000
#define RT5739_VOLT_STPUV 5000
#define RT5739_N_VOLTS 201
#define RT5739_I2CRDY_TIMEUS 1000
static int rt5739_set_mode(struct regulator_dev *rdev, unsigned int mode)
{
const struct regulator_desc *desc = rdev->desc;
struct regmap *regmap = rdev_get_regmap(rdev);
unsigned int mask, val;
if (desc->vsel_reg == RT5739_REG_NSEL0)
mask = RT5739_MODEVSEL0_MASK;
else
mask = RT5739_MODEVSEL1_MASK;
switch (mode) {
case REGULATOR_MODE_FAST:
val = mask;
break;
case REGULATOR_MODE_NORMAL:
val = 0;
break;
default:
return -EINVAL;
}
return regmap_update_bits(regmap, RT5739_REG_CNTL1, mask, val);
}
static unsigned int rt5739_get_mode(struct regulator_dev *rdev)
{
const struct regulator_desc *desc = rdev->desc;
struct regmap *regmap = rdev_get_regmap(rdev);
unsigned int mask, val;
int ret;
if (desc->vsel_reg == RT5739_REG_NSEL0)
mask = RT5739_MODEVSEL0_MASK;
else
mask = RT5739_MODEVSEL1_MASK;
ret = regmap_read(regmap, RT5739_REG_CNTL1, &val);
if (ret)
return REGULATOR_MODE_INVALID;
if (val & mask)
return REGULATOR_MODE_FAST;
return REGULATOR_MODE_NORMAL;
}
static int rt5739_set_suspend_voltage(struct regulator_dev *rdev, int uV)
{
const struct regulator_desc *desc = rdev->desc;
struct regmap *regmap = rdev_get_regmap(rdev);
unsigned int reg, vsel;
if (uV < RT5739_VOLT_MINUV || uV > RT5739_VOLT_MAXUV)
return -EINVAL;
if (desc->vsel_reg == RT5739_REG_NSEL0)
reg = RT5739_REG_NSEL1;
else
reg = RT5739_REG_NSEL0;
vsel = (uV - RT5739_VOLT_MINUV) / RT5739_VOLT_STPUV;
return regmap_write(regmap, reg, vsel);
}
static int rt5739_set_suspend_enable(struct regulator_dev *rdev)
{
const struct regulator_desc *desc = rdev->desc;
struct regmap *regmap = rdev_get_regmap(rdev);
unsigned int mask;
if (desc->vsel_reg == RT5739_REG_NSEL0)
mask = RT5739_ENVSEL1_MASK;
else
mask = RT5739_ENVSEL0_MASK;
return regmap_update_bits(regmap, desc->enable_reg, mask, mask);
}
static int rt5739_set_suspend_disable(struct regulator_dev *rdev)
{
const struct regulator_desc *desc = rdev->desc;
struct regmap *regmap = rdev_get_regmap(rdev);
unsigned int mask;
if (desc->vsel_reg == RT5739_REG_NSEL0)
mask = RT5739_ENVSEL1_MASK;
else
mask = RT5739_ENVSEL0_MASK;
return regmap_update_bits(regmap, desc->enable_reg, mask, 0);
}
static int rt5739_set_suspend_mode(struct regulator_dev *rdev,
unsigned int mode)
{
const struct regulator_desc *desc = rdev->desc;
struct regmap *regmap = rdev_get_regmap(rdev);
unsigned int mask, val;
if (desc->vsel_reg == RT5739_REG_NSEL0)
mask = RT5739_MODEVSEL1_MASK;
else
mask = RT5739_MODEVSEL0_MASK;
switch (mode) {
case REGULATOR_MODE_FAST:
val = mask;
break;
case REGULATOR_MODE_NORMAL:
val = 0;
break;
default:
return -EINVAL;
}
return regmap_update_bits(regmap, RT5739_REG_CNTL1, mask, val);
}
static const struct regulator_ops rt5739_regulator_ops = {
.list_voltage = regulator_list_voltage_linear,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.set_active_discharge = regulator_set_active_discharge_regmap,
.set_mode = rt5739_set_mode,
.get_mode = rt5739_get_mode,
.set_suspend_voltage = rt5739_set_suspend_voltage,
.set_suspend_enable = rt5739_set_suspend_enable,
.set_suspend_disable = rt5739_set_suspend_disable,
.set_suspend_mode = rt5739_set_suspend_mode,
};
static unsigned int rt5739_of_map_mode(unsigned int mode)
{
switch (mode) {
case RT5739_AUTO_MODE:
return REGULATOR_MODE_NORMAL;
case RT5739_FPWM_MODE:
return REGULATOR_MODE_FAST;
default:
return REGULATOR_MODE_INVALID;
}
}
static void rt5739_init_regulator_desc(struct regulator_desc *desc,
bool vsel_active_high)
{
/* Fixed */
desc->name = "rt5739-regulator";
desc->owner = THIS_MODULE;
desc->ops = &rt5739_regulator_ops;
desc->n_voltages = RT5739_N_VOLTS;
desc->min_uV = RT5739_VOLT_MINUV;
desc->uV_step = RT5739_VOLT_STPUV;
desc->vsel_mask = RT5739_VSEL_MASK;
desc->enable_reg = RT5739_REG_CNTL2;
desc->active_discharge_reg = RT5739_REG_CNTL1;
desc->active_discharge_mask = RT5739_ACTD_MASK;
desc->active_discharge_on = RT5739_ACTD_MASK;
desc->of_map_mode = rt5739_of_map_mode;
/* Assigned by vsel level */
if (vsel_active_high) {
desc->vsel_reg = RT5739_REG_NSEL1;
desc->enable_mask = RT5739_ENVSEL1_MASK;
} else {
desc->vsel_reg = RT5739_REG_NSEL0;
desc->enable_mask = RT5739_ENVSEL0_MASK;
}
}
static const struct regmap_config rt5739_regmap_config = {
.name = "rt5739",
.reg_bits = 8,
.val_bits = 8,
.max_register = RT5739_REG_CNTL4,
};
static int rt5739_probe(struct i2c_client *i2c)
{
struct device *dev = &i2c->dev;
struct regulator_desc *desc;
struct regmap *regmap;
struct gpio_desc *enable_gpio;
struct regulator_config cfg = {};
struct regulator_dev *rdev;
bool vsel_acth;
unsigned int vid;
int ret;
desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);
if (!desc)
return -ENOMEM;
enable_gpio = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_HIGH);
if (IS_ERR(enable_gpio))
return dev_err_probe(dev, PTR_ERR(enable_gpio), "Failed to get 'enable' gpio\n");
else if (enable_gpio)
usleep_range(RT5739_I2CRDY_TIMEUS, RT5739_I2CRDY_TIMEUS + 1000);
regmap = devm_regmap_init_i2c(i2c, &rt5739_regmap_config);
if (IS_ERR(regmap))
return dev_err_probe(dev, PTR_ERR(regmap), "Failed to init regmap\n");
ret = regmap_read(regmap, RT5739_REG_ID1, &vid);
if (ret)
return dev_err_probe(dev, ret, "Failed to read VID\n");
/* RT5739: (VID & MASK) must be 0 */
if (vid & RT5739_VID_MASK)
return dev_err_probe(dev, -ENODEV, "Incorrect VID (0x%02x)\n", vid);
vsel_acth = device_property_read_bool(dev, "richtek,vsel-active-high");
rt5739_init_regulator_desc(desc, vsel_acth);
cfg.dev = dev;
cfg.of_node = dev_of_node(dev);
cfg.init_data = of_get_regulator_init_data(dev, dev_of_node(dev), desc);
rdev = devm_regulator_register(dev, desc, &cfg);
if (IS_ERR(rdev))
return dev_err_probe(dev, PTR_ERR(rdev), "Failed to register regulator\n");
return 0;
}
static const struct of_device_id rt5739_device_table[] = {
{ .compatible = "richtek,rt5739" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, rt5739_device_table);
static struct i2c_driver rt5739_driver = {
.driver = {
.name = "rt5739",
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
.of_match_table = rt5739_device_table,
},
.probe_new = rt5739_probe,
};
module_i2c_driver(rt5739_driver);
MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
MODULE_DESCRIPTION("Richtek RT5739 regulator driver");
MODULE_LICENSE("GPL");
|