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
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2019-2020, The Linux Foundation. All rights reserved.
* Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
* Copyright (c) 2024 Linaro Limited
*/
#include <linux/array_size.h>
#include <linux/bits.h>
#include <linux/device.h>
#include <linux/math.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#include <asm/byteorder.h>
#define DEFAULT_VOLTAGE_STEPPER_RATE 38400
#define LDO_STEPPER_CTL_REG 0x3b
#define STEP_RATE_MASK GENMASK(1, 0)
#define LDO_VSET_LB_REG 0x40
#define LDO_ENABLE_REG 0x46
#define ENABLE_BIT BIT(7)
struct pm8008_regulator {
struct regmap *regmap;
struct regulator_desc desc;
unsigned int base;
};
struct pm8008_regulator_data {
const char *name;
const char *supply_name;
unsigned int base;
int min_dropout_uV;
const struct linear_range *voltage_range;
};
static const struct linear_range nldo_ranges[] = {
REGULATOR_LINEAR_RANGE(528000, 0, 122, 8000),
};
static const struct linear_range pldo_ranges[] = {
REGULATOR_LINEAR_RANGE(1504000, 0, 237, 8000),
};
static const struct pm8008_regulator_data pm8008_reg_data[] = {
{ "ldo1", "vdd-l1-l2", 0x4000, 225000, nldo_ranges, },
{ "ldo2", "vdd-l1-l2", 0x4100, 225000, nldo_ranges, },
{ "ldo3", "vdd-l3-l4", 0x4200, 300000, pldo_ranges, },
{ "ldo4", "vdd-l3-l4", 0x4300, 300000, pldo_ranges, },
{ "ldo5", "vdd-l5", 0x4400, 200000, pldo_ranges, },
{ "ldo6", "vdd-l6", 0x4500, 200000, pldo_ranges, },
{ "ldo7", "vdd-l7", 0x4600, 200000, pldo_ranges, },
};
static int pm8008_regulator_set_voltage_sel(struct regulator_dev *rdev, unsigned int sel)
{
struct pm8008_regulator *preg = rdev_get_drvdata(rdev);
unsigned int mV;
__le16 val;
int ret;
ret = regulator_list_voltage_linear_range(rdev, sel);
if (ret < 0)
return ret;
mV = DIV_ROUND_UP(ret, 1000);
val = cpu_to_le16(mV);
ret = regmap_bulk_write(preg->regmap, preg->base + LDO_VSET_LB_REG,
&val, sizeof(val));
if (ret < 0)
return ret;
return 0;
}
static int pm8008_regulator_get_voltage_sel(struct regulator_dev *rdev)
{
struct pm8008_regulator *preg = rdev_get_drvdata(rdev);
unsigned int uV;
__le16 val;
int ret;
ret = regmap_bulk_read(preg->regmap, preg->base + LDO_VSET_LB_REG,
&val, sizeof(val));
if (ret < 0)
return ret;
uV = le16_to_cpu(val) * 1000;
return (uV - preg->desc.min_uV) / preg->desc.uV_step;
}
static const struct regulator_ops pm8008_regulator_ops = {
.list_voltage = regulator_list_voltage_linear,
.set_voltage_sel = pm8008_regulator_set_voltage_sel,
.get_voltage_sel = pm8008_regulator_get_voltage_sel,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
};
static int pm8008_regulator_probe(struct platform_device *pdev)
{
const struct pm8008_regulator_data *data;
struct regulator_config config = {};
struct device *dev = &pdev->dev;
struct pm8008_regulator *preg;
struct regulator_desc *desc;
struct regulator_dev *rdev;
struct regmap *regmap;
unsigned int val;
int ret, i;
regmap = dev_get_regmap(dev->parent, "secondary");
if (!regmap)
return -EINVAL;
for (i = 0; i < ARRAY_SIZE(pm8008_reg_data); i++) {
data = &pm8008_reg_data[i];
preg = devm_kzalloc(dev, sizeof(*preg), GFP_KERNEL);
if (!preg)
return -ENOMEM;
preg->regmap = regmap;
preg->base = data->base;
desc = &preg->desc;
desc->name = data->name;
desc->supply_name = data->supply_name;
desc->of_match = data->name;
desc->regulators_node = of_match_ptr("regulators");
desc->ops = &pm8008_regulator_ops;
desc->type = REGULATOR_VOLTAGE;
desc->owner = THIS_MODULE;
desc->linear_ranges = data->voltage_range;
desc->n_linear_ranges = 1;
desc->uV_step = desc->linear_ranges[0].step;
desc->min_uV = desc->linear_ranges[0].min;
desc->n_voltages = linear_range_values_in_range(&desc->linear_ranges[0]);
ret = regmap_read(regmap, preg->base + LDO_STEPPER_CTL_REG, &val);
if (ret < 0) {
dev_err(dev, "failed to read step rate: %d\n", ret);
return ret;
}
val &= STEP_RATE_MASK;
desc->ramp_delay = DEFAULT_VOLTAGE_STEPPER_RATE >> val;
desc->min_dropout_uV = data->min_dropout_uV;
desc->enable_reg = preg->base + LDO_ENABLE_REG;
desc->enable_mask = ENABLE_BIT;
config.dev = dev->parent;
config.driver_data = preg;
config.regmap = regmap;
rdev = devm_regulator_register(dev, desc, &config);
if (IS_ERR(rdev)) {
ret = PTR_ERR(rdev);
dev_err(dev, "failed to register regulator %s: %d\n",
desc->name, ret);
return ret;
}
}
return 0;
}
static const struct platform_device_id pm8008_regulator_id_table[] = {
{ "pm8008-regulator" },
{ }
};
MODULE_DEVICE_TABLE(platform, pm8008_regulator_id_table);
static struct platform_driver pm8008_regulator_driver = {
.driver = {
.name = "qcom-pm8008-regulator",
},
.probe = pm8008_regulator_probe,
.id_table = pm8008_regulator_id_table,
};
module_platform_driver(pm8008_regulator_driver);
MODULE_DESCRIPTION("Qualcomm PM8008 PMIC regulator driver");
MODULE_LICENSE("GPL");
|
