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c2b2afe6 OS |
1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* | |
3 | * Copyright (c) 2022 Analog Devices, Inc. | |
4 | * ADI Regulator driver for the MAX77540 and MAX77541 | |
5 | */ | |
6 | ||
7 | #include <linux/mfd/max77541.h> | |
8 | #include <linux/mod_devicetable.h> | |
9 | #include <linux/platform_device.h> | |
10 | #include <linux/regmap.h> | |
11 | #include <linux/regulator/driver.h> | |
12 | ||
13 | static const struct regulator_ops max77541_buck_ops = { | |
14 | .enable = regulator_enable_regmap, | |
15 | .disable = regulator_disable_regmap, | |
16 | .is_enabled = regulator_is_enabled_regmap, | |
17 | .list_voltage = regulator_list_voltage_pickable_linear_range, | |
18 | .get_voltage_sel = regulator_get_voltage_sel_pickable_regmap, | |
19 | .set_voltage_sel = regulator_set_voltage_sel_pickable_regmap, | |
20 | }; | |
21 | ||
22 | static const struct linear_range max77540_buck_ranges[] = { | |
23 | /* Ranges when VOLT_SEL bits are 0x00 */ | |
24 | REGULATOR_LINEAR_RANGE(500000, 0x00, 0x8B, 5000), | |
25 | REGULATOR_LINEAR_RANGE(1200000, 0x8C, 0xFF, 0), | |
26 | /* Ranges when VOLT_SEL bits are 0x40 */ | |
27 | REGULATOR_LINEAR_RANGE(1200000, 0x00, 0x8B, 10000), | |
28 | REGULATOR_LINEAR_RANGE(2400000, 0x8C, 0xFF, 0), | |
29 | /* Ranges when VOLT_SEL bits are 0x80 */ | |
30 | REGULATOR_LINEAR_RANGE(2000000, 0x00, 0x9F, 20000), | |
31 | REGULATOR_LINEAR_RANGE(5200000, 0xA0, 0xFF, 0), | |
32 | }; | |
33 | ||
34 | static const struct linear_range max77541_buck_ranges[] = { | |
35 | /* Ranges when VOLT_SEL bits are 0x00 */ | |
36 | REGULATOR_LINEAR_RANGE(300000, 0x00, 0xB3, 5000), | |
37 | REGULATOR_LINEAR_RANGE(1200000, 0xB4, 0xFF, 0), | |
38 | /* Ranges when VOLT_SEL bits are 0x40 */ | |
39 | REGULATOR_LINEAR_RANGE(1200000, 0x00, 0x8B, 10000), | |
40 | REGULATOR_LINEAR_RANGE(2400000, 0x8C, 0xFF, 0), | |
41 | /* Ranges when VOLT_SEL bits are 0x80 */ | |
42 | REGULATOR_LINEAR_RANGE(2000000, 0x00, 0x9F, 20000), | |
43 | REGULATOR_LINEAR_RANGE(5200000, 0xA0, 0xFF, 0), | |
44 | }; | |
45 | ||
46 | static const unsigned int max77541_buck_volt_range_sel[] = { | |
47 | 0x00, 0x00, 0x40, 0x40, 0x80, 0x80, | |
48 | }; | |
49 | ||
50 | enum max77541_regulators { | |
51 | MAX77541_BUCK1 = 1, | |
52 | MAX77541_BUCK2, | |
53 | }; | |
54 | ||
55 | #define MAX77540_BUCK(_id, _ops) \ | |
56 | { .id = MAX77541_BUCK ## _id, \ | |
57 | .name = "buck"#_id, \ | |
58 | .of_match = "buck"#_id, \ | |
59 | .regulators_node = "regulators", \ | |
60 | .enable_reg = MAX77541_REG_EN_CTRL, \ | |
61 | .enable_mask = MAX77541_BIT_M ## _id ## _EN, \ | |
62 | .ops = &(_ops), \ | |
63 | .type = REGULATOR_VOLTAGE, \ | |
64 | .linear_ranges = max77540_buck_ranges, \ | |
65 | .n_linear_ranges = ARRAY_SIZE(max77540_buck_ranges), \ | |
66 | .vsel_reg = MAX77541_REG_M ## _id ## _VOUT, \ | |
67 | .vsel_mask = MAX77541_BITS_MX_VOUT, \ | |
68 | .vsel_range_reg = MAX77541_REG_M ## _id ## _CFG1, \ | |
69 | .vsel_range_mask = MAX77541_BITS_MX_CFG1_RNG, \ | |
70 | .linear_range_selectors = max77541_buck_volt_range_sel, \ | |
71 | .owner = THIS_MODULE, \ | |
72 | } | |
73 | ||
74 | #define MAX77541_BUCK(_id, _ops) \ | |
75 | { .id = MAX77541_BUCK ## _id, \ | |
76 | .name = "buck"#_id, \ | |
77 | .of_match = "buck"#_id, \ | |
78 | .regulators_node = "regulators", \ | |
79 | .enable_reg = MAX77541_REG_EN_CTRL, \ | |
80 | .enable_mask = MAX77541_BIT_M ## _id ## _EN, \ | |
81 | .ops = &(_ops), \ | |
82 | .type = REGULATOR_VOLTAGE, \ | |
83 | .linear_ranges = max77541_buck_ranges, \ | |
84 | .n_linear_ranges = ARRAY_SIZE(max77541_buck_ranges), \ | |
85 | .vsel_reg = MAX77541_REG_M ## _id ## _VOUT, \ | |
86 | .vsel_mask = MAX77541_BITS_MX_VOUT, \ | |
87 | .vsel_range_reg = MAX77541_REG_M ## _id ## _CFG1, \ | |
88 | .vsel_range_mask = MAX77541_BITS_MX_CFG1_RNG, \ | |
89 | .linear_range_selectors = max77541_buck_volt_range_sel, \ | |
90 | .owner = THIS_MODULE, \ | |
91 | } | |
92 | ||
93 | static const struct regulator_desc max77540_regulators_desc[] = { | |
94 | MAX77540_BUCK(1, max77541_buck_ops), | |
95 | MAX77540_BUCK(2, max77541_buck_ops), | |
96 | }; | |
97 | ||
98 | static const struct regulator_desc max77541_regulators_desc[] = { | |
99 | MAX77541_BUCK(1, max77541_buck_ops), | |
100 | MAX77541_BUCK(2, max77541_buck_ops), | |
101 | }; | |
102 | ||
103 | static int max77541_regulator_probe(struct platform_device *pdev) | |
104 | { | |
105 | struct regulator_config config = {}; | |
106 | const struct regulator_desc *desc; | |
107 | struct device *dev = &pdev->dev; | |
108 | struct regulator_dev *rdev; | |
109 | struct max77541 *max77541 = dev_get_drvdata(dev->parent); | |
110 | unsigned int i; | |
111 | ||
112 | config.dev = dev->parent; | |
113 | ||
114 | switch (max77541->id) { | |
115 | case MAX77540: | |
116 | desc = max77540_regulators_desc; | |
117 | break; | |
118 | case MAX77541: | |
119 | desc = max77541_regulators_desc; | |
120 | break; | |
121 | default: | |
122 | return -EINVAL; | |
123 | } | |
124 | ||
125 | for (i = 0; i < MAX77541_MAX_REGULATORS; i++) { | |
126 | rdev = devm_regulator_register(dev, &desc[i], &config); | |
127 | if (IS_ERR(rdev)) | |
128 | return dev_err_probe(dev, PTR_ERR(rdev), | |
129 | "Failed to register regulator\n"); | |
130 | } | |
131 | ||
132 | return 0; | |
133 | } | |
134 | ||
135 | static const struct platform_device_id max77541_regulator_platform_id[] = { | |
136 | { "max77540-regulator" }, | |
137 | { "max77541-regulator" }, | |
138 | { } | |
139 | }; | |
140 | MODULE_DEVICE_TABLE(platform, max77541_regulator_platform_id); | |
141 | ||
142 | static struct platform_driver max77541_regulator_driver = { | |
143 | .driver = { | |
144 | .name = "max77541-regulator", | |
145 | }, | |
146 | .probe = max77541_regulator_probe, | |
147 | .id_table = max77541_regulator_platform_id, | |
148 | }; | |
149 | module_platform_driver(max77541_regulator_driver); | |
150 | ||
151 | MODULE_AUTHOR("Okan Sahin <Okan.Sahin@analog.com>"); | |
152 | MODULE_DESCRIPTION("MAX77540/MAX77541 regulator driver"); | |
153 | MODULE_LICENSE("GPL"); |