Commit | Line | Data |
---|---|---|
7b0518fb ML |
1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* | |
3 | * Copyright (C) 2023 Axis Communications AB | |
4 | * | |
5 | * Driver for Texas Instruments TPS6287x PMIC. | |
6 | * Datasheet: https://www.ti.com/lit/ds/symlink/tps62873.pdf | |
7 | */ | |
8 | ||
9 | #include <linux/err.h> | |
10 | #include <linux/i2c.h> | |
045a44d4 | 11 | #include <linux/mod_devicetable.h> |
7b0518fb | 12 | #include <linux/module.h> |
7b0518fb ML |
13 | #include <linux/regmap.h> |
14 | #include <linux/regulator/of_regulator.h> | |
15 | #include <linux/regulator/machine.h> | |
16 | #include <linux/regulator/driver.h> | |
17 | #include <linux/bitfield.h> | |
18 | #include <linux/linear_range.h> | |
19 | ||
20 | #define TPS6287X_VSET 0x00 | |
21 | #define TPS6287X_CTRL1 0x01 | |
22 | #define TPS6287X_CTRL1_VRAMP GENMASK(1, 0) | |
23 | #define TPS6287X_CTRL1_FPWMEN BIT(4) | |
24 | #define TPS6287X_CTRL1_SWEN BIT(5) | |
25 | #define TPS6287X_CTRL2 0x02 | |
26 | #define TPS6287X_CTRL2_VRANGE GENMASK(3, 2) | |
27 | #define TPS6287X_CTRL3 0x03 | |
28 | #define TPS6287X_STATUS 0x04 | |
29 | ||
30 | static const struct regmap_config tps6287x_regmap_config = { | |
31 | .reg_bits = 8, | |
32 | .val_bits = 8, | |
33 | .max_register = TPS6287X_STATUS, | |
34 | }; | |
35 | ||
36 | static const struct linear_range tps6287x_voltage_ranges[] = { | |
37 | LINEAR_RANGE(400000, 0, 0xFF, 1250), | |
38 | LINEAR_RANGE(400000, 0, 0xFF, 2500), | |
39 | LINEAR_RANGE(400000, 0, 0xFF, 5000), | |
40 | LINEAR_RANGE(800000, 0, 0xFF, 10000), | |
41 | }; | |
42 | ||
43 | static const unsigned int tps6287x_voltage_range_sel[] = { | |
269cb04b | 44 | 0x0, 0x1, 0x2, 0x3 |
7b0518fb ML |
45 | }; |
46 | ||
47 | static const unsigned int tps6287x_ramp_table[] = { | |
48 | 10000, 5000, 1250, 500 | |
49 | }; | |
50 | ||
51 | static int tps6287x_set_mode(struct regulator_dev *rdev, unsigned int mode) | |
52 | { | |
53 | unsigned int val; | |
54 | ||
55 | switch (mode) { | |
56 | case REGULATOR_MODE_NORMAL: | |
57 | val = 0; | |
58 | break; | |
59 | case REGULATOR_MODE_FAST: | |
60 | val = TPS6287X_CTRL1_FPWMEN; | |
61 | break; | |
62 | default: | |
63 | return -EINVAL; | |
64 | } | |
65 | ||
66 | return regmap_update_bits(rdev->regmap, TPS6287X_CTRL1, | |
67 | TPS6287X_CTRL1_FPWMEN, val); | |
68 | } | |
69 | ||
70 | static unsigned int tps6287x_get_mode(struct regulator_dev *rdev) | |
71 | { | |
72 | unsigned int val; | |
73 | int ret; | |
74 | ||
75 | ret = regmap_read(rdev->regmap, TPS6287X_CTRL1, &val); | |
76 | if (ret < 0) | |
77 | return 0; | |
78 | ||
79 | return (val & TPS6287X_CTRL1_FPWMEN) ? REGULATOR_MODE_FAST : | |
80 | REGULATOR_MODE_NORMAL; | |
81 | } | |
82 | ||
83 | static unsigned int tps6287x_of_map_mode(unsigned int mode) | |
84 | { | |
85 | switch (mode) { | |
86 | case REGULATOR_MODE_NORMAL: | |
87 | case REGULATOR_MODE_FAST: | |
88 | return mode; | |
89 | default: | |
90 | return REGULATOR_MODE_INVALID; | |
91 | } | |
92 | } | |
93 | ||
94 | static const struct regulator_ops tps6287x_regulator_ops = { | |
95 | .enable = regulator_enable_regmap, | |
96 | .disable = regulator_disable_regmap, | |
97 | .set_mode = tps6287x_set_mode, | |
98 | .get_mode = tps6287x_get_mode, | |
99 | .is_enabled = regulator_is_enabled_regmap, | |
100 | .get_voltage_sel = regulator_get_voltage_sel_pickable_regmap, | |
101 | .set_voltage_sel = regulator_set_voltage_sel_pickable_regmap, | |
102 | .list_voltage = regulator_list_voltage_pickable_linear_range, | |
103 | .set_ramp_delay = regulator_set_ramp_delay_regmap, | |
104 | }; | |
105 | ||
106 | static struct regulator_desc tps6287x_reg = { | |
107 | .name = "tps6287x", | |
108 | .owner = THIS_MODULE, | |
109 | .ops = &tps6287x_regulator_ops, | |
110 | .of_map_mode = tps6287x_of_map_mode, | |
111 | .type = REGULATOR_VOLTAGE, | |
112 | .enable_reg = TPS6287X_CTRL1, | |
113 | .enable_mask = TPS6287X_CTRL1_SWEN, | |
114 | .vsel_reg = TPS6287X_VSET, | |
115 | .vsel_mask = 0xFF, | |
116 | .vsel_range_reg = TPS6287X_CTRL2, | |
117 | .vsel_range_mask = TPS6287X_CTRL2_VRANGE, | |
118 | .ramp_reg = TPS6287X_CTRL1, | |
119 | .ramp_mask = TPS6287X_CTRL1_VRAMP, | |
120 | .ramp_delay_table = tps6287x_ramp_table, | |
121 | .n_ramp_values = ARRAY_SIZE(tps6287x_ramp_table), | |
c6929055 | 122 | .n_voltages = 256 * ARRAY_SIZE(tps6287x_voltage_ranges), |
7b0518fb ML |
123 | .linear_ranges = tps6287x_voltage_ranges, |
124 | .n_linear_ranges = ARRAY_SIZE(tps6287x_voltage_ranges), | |
269cb04b | 125 | .linear_range_selectors_bitfield = tps6287x_voltage_range_sel, |
7b0518fb ML |
126 | }; |
127 | ||
128 | static int tps6287x_i2c_probe(struct i2c_client *i2c) | |
129 | { | |
130 | struct device *dev = &i2c->dev; | |
131 | struct regulator_config config = {}; | |
132 | struct regulator_dev *rdev; | |
133 | ||
134 | config.regmap = devm_regmap_init_i2c(i2c, &tps6287x_regmap_config); | |
135 | if (IS_ERR(config.regmap)) { | |
136 | dev_err(dev, "Failed to init i2c\n"); | |
137 | return PTR_ERR(config.regmap); | |
138 | } | |
139 | ||
140 | config.dev = dev; | |
141 | config.of_node = dev->of_node; | |
142 | config.init_data = of_get_regulator_init_data(dev, dev->of_node, | |
143 | &tps6287x_reg); | |
144 | ||
145 | rdev = devm_regulator_register(dev, &tps6287x_reg, &config); | |
146 | if (IS_ERR(rdev)) { | |
147 | dev_err(dev, "Failed to register regulator\n"); | |
148 | return PTR_ERR(rdev); | |
149 | } | |
150 | ||
151 | dev_dbg(dev, "Probed regulator\n"); | |
152 | ||
153 | return 0; | |
154 | } | |
155 | ||
156 | static const struct of_device_id tps6287x_dt_ids[] = { | |
157 | { .compatible = "ti,tps62870", }, | |
158 | { .compatible = "ti,tps62871", }, | |
159 | { .compatible = "ti,tps62872", }, | |
160 | { .compatible = "ti,tps62873", }, | |
161 | { } | |
162 | }; | |
163 | ||
164 | MODULE_DEVICE_TABLE(of, tps6287x_dt_ids); | |
165 | ||
166 | static const struct i2c_device_id tps6287x_i2c_id[] = { | |
167 | { "tps62870", 0 }, | |
168 | { "tps62871", 0 }, | |
169 | { "tps62872", 0 }, | |
170 | { "tps62873", 0 }, | |
171 | {}, | |
172 | }; | |
173 | ||
174 | MODULE_DEVICE_TABLE(i2c, tps6287x_i2c_id); | |
175 | ||
176 | static struct i2c_driver tps6287x_regulator_driver = { | |
177 | .driver = { | |
178 | .name = "tps6287x", | |
179 | .of_match_table = tps6287x_dt_ids, | |
180 | }, | |
d692cc61 | 181 | .probe = tps6287x_i2c_probe, |
7b0518fb ML |
182 | .id_table = tps6287x_i2c_id, |
183 | }; | |
184 | ||
185 | module_i2c_driver(tps6287x_regulator_driver); | |
186 | ||
187 | MODULE_AUTHOR("Mårten Lindahl <marten.lindahl@axis.com>"); | |
188 | MODULE_DESCRIPTION("Regulator driver for TI TPS6287X PMIC"); | |
189 | MODULE_LICENSE("GPL"); |