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e85c5a15 MV |
1 | /* |
2 | * ROHM BD9571MWV-M regulator driver | |
3 | * | |
4 | * Copyright (C) 2017 Marek Vasut <marek.vasut+renesas@gmail.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed "as is" WITHOUT ANY WARRANTY of any | |
11 | * kind, whether expressed or implied; without even the implied warranty | |
12 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License version 2 for more details. | |
14 | * | |
15 | * Based on the TPS65086 driver | |
16 | * | |
17 | * NOTE: VD09 is missing | |
18 | */ | |
19 | ||
20 | #include <linux/module.h> | |
21 | #include <linux/of.h> | |
22 | #include <linux/platform_device.h> | |
23 | #include <linux/regulator/driver.h> | |
24 | ||
25 | #include <linux/mfd/bd9571mwv.h> | |
26 | ||
27 | enum bd9571mwv_regulators { VD09, VD18, VD25, VD33, DVFS }; | |
28 | ||
29 | #define BD9571MWV_REG(_name, _of, _id, _ops, _vr, _vm, _nv, _min, _step, _lmin)\ | |
30 | { \ | |
31 | .name = _name, \ | |
32 | .of_match = of_match_ptr(_of), \ | |
33 | .regulators_node = "regulators", \ | |
34 | .id = _id, \ | |
35 | .ops = &_ops, \ | |
36 | .n_voltages = _nv, \ | |
37 | .type = REGULATOR_VOLTAGE, \ | |
38 | .owner = THIS_MODULE, \ | |
39 | .vsel_reg = _vr, \ | |
40 | .vsel_mask = _vm, \ | |
41 | .min_uV = _min, \ | |
42 | .uV_step = _step, \ | |
43 | .linear_min_sel = _lmin, \ | |
44 | } | |
45 | ||
cb42b648 | 46 | static int bd9571mwv_avs_get_moni_state(struct regulator_dev *rdev) |
e85c5a15 MV |
47 | { |
48 | unsigned int val; | |
49 | int ret; | |
50 | ||
51 | ret = regmap_read(rdev->regmap, BD9571MWV_AVS_SET_MONI, &val); | |
52 | if (ret != 0) | |
53 | return ret; | |
54 | ||
55 | return val & BD9571MWV_AVS_SET_MONI_MASK; | |
56 | } | |
57 | ||
cb42b648 AL |
58 | static int bd9571mwv_avs_set_voltage_sel_regmap(struct regulator_dev *rdev, |
59 | unsigned int sel) | |
e85c5a15 MV |
60 | { |
61 | int ret; | |
62 | ||
63 | ret = bd9571mwv_avs_get_moni_state(rdev); | |
64 | if (ret < 0) | |
65 | return ret; | |
66 | ||
67 | return regmap_write_bits(rdev->regmap, BD9571MWV_AVS_VD09_VID(ret), | |
68 | rdev->desc->vsel_mask, sel); | |
69 | } | |
70 | ||
cb42b648 | 71 | static int bd9571mwv_avs_get_voltage_sel_regmap(struct regulator_dev *rdev) |
e85c5a15 MV |
72 | { |
73 | unsigned int val; | |
74 | int ret; | |
75 | ||
76 | ret = bd9571mwv_avs_get_moni_state(rdev); | |
77 | if (ret < 0) | |
78 | return ret; | |
79 | ||
80 | ret = regmap_read(rdev->regmap, BD9571MWV_AVS_VD09_VID(ret), &val); | |
81 | if (ret != 0) | |
82 | return ret; | |
83 | ||
84 | val &= rdev->desc->vsel_mask; | |
85 | val >>= ffs(rdev->desc->vsel_mask) - 1; | |
86 | ||
87 | return val; | |
88 | } | |
89 | ||
cb42b648 AL |
90 | static int bd9571mwv_reg_set_voltage_sel_regmap(struct regulator_dev *rdev, |
91 | unsigned int sel) | |
e85c5a15 MV |
92 | { |
93 | return regmap_write_bits(rdev->regmap, BD9571MWV_DVFS_SETVID, | |
94 | rdev->desc->vsel_mask, sel); | |
95 | } | |
96 | ||
97 | /* Operations permitted on AVS voltage regulator */ | |
98 | static struct regulator_ops avs_ops = { | |
99 | .set_voltage_sel = bd9571mwv_avs_set_voltage_sel_regmap, | |
100 | .map_voltage = regulator_map_voltage_linear, | |
101 | .get_voltage_sel = bd9571mwv_avs_get_voltage_sel_regmap, | |
102 | .list_voltage = regulator_list_voltage_linear, | |
103 | }; | |
104 | ||
105 | /* Operations permitted on voltage regulators */ | |
106 | static struct regulator_ops reg_ops = { | |
107 | .set_voltage_sel = bd9571mwv_reg_set_voltage_sel_regmap, | |
108 | .map_voltage = regulator_map_voltage_linear, | |
109 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
110 | .list_voltage = regulator_list_voltage_linear, | |
111 | }; | |
112 | ||
113 | /* Operations permitted on voltage monitors */ | |
114 | static struct regulator_ops vid_ops = { | |
115 | .map_voltage = regulator_map_voltage_linear, | |
116 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
117 | .list_voltage = regulator_list_voltage_linear, | |
118 | }; | |
119 | ||
120 | static struct regulator_desc regulators[] = { | |
121 | BD9571MWV_REG("VD09", "vd09", VD09, avs_ops, 0, 0x7f, | |
122 | 0x80, 600000, 10000, 0x3c), | |
123 | BD9571MWV_REG("VD18", "vd18", VD18, vid_ops, BD9571MWV_VD18_VID, 0xf, | |
124 | 16, 1625000, 25000, 0), | |
125 | BD9571MWV_REG("VD25", "vd25", VD25, vid_ops, BD9571MWV_VD25_VID, 0xf, | |
126 | 16, 2150000, 50000, 0), | |
127 | BD9571MWV_REG("VD33", "vd33", VD33, vid_ops, BD9571MWV_VD33_VID, 0xf, | |
128 | 11, 2800000, 100000, 0), | |
129 | BD9571MWV_REG("DVFS", "dvfs", DVFS, reg_ops, | |
130 | BD9571MWV_DVFS_MONIVDAC, 0x7f, | |
131 | 0x80, 600000, 10000, 0x3c), | |
132 | }; | |
133 | ||
134 | static int bd9571mwv_regulator_probe(struct platform_device *pdev) | |
135 | { | |
136 | struct bd9571mwv *bd = dev_get_drvdata(pdev->dev.parent); | |
137 | struct regulator_config config = { }; | |
138 | struct regulator_dev *rdev; | |
139 | int i; | |
140 | ||
141 | platform_set_drvdata(pdev, bd); | |
142 | ||
143 | config.dev = &pdev->dev; | |
144 | config.dev->of_node = bd->dev->of_node; | |
145 | config.driver_data = bd; | |
146 | config.regmap = bd->regmap; | |
147 | ||
148 | for (i = 0; i < ARRAY_SIZE(regulators); i++) { | |
149 | rdev = devm_regulator_register(&pdev->dev, ®ulators[i], | |
150 | &config); | |
151 | if (IS_ERR(rdev)) { | |
152 | dev_err(bd->dev, "failed to register %s regulator\n", | |
153 | pdev->name); | |
154 | return PTR_ERR(rdev); | |
155 | } | |
156 | } | |
157 | ||
158 | return 0; | |
159 | } | |
160 | ||
161 | static const struct platform_device_id bd9571mwv_regulator_id_table[] = { | |
162 | { "bd9571mwv-regulator", }, | |
163 | { /* sentinel */ } | |
164 | }; | |
165 | MODULE_DEVICE_TABLE(platform, bd9571mwv_regulator_id_table); | |
166 | ||
167 | static struct platform_driver bd9571mwv_regulator_driver = { | |
168 | .driver = { | |
169 | .name = "bd9571mwv-regulator", | |
170 | }, | |
171 | .probe = bd9571mwv_regulator_probe, | |
172 | .id_table = bd9571mwv_regulator_id_table, | |
173 | }; | |
174 | module_platform_driver(bd9571mwv_regulator_driver); | |
175 | ||
176 | MODULE_AUTHOR("Marek Vasut <marek.vasut+renesas@gmail.com>"); | |
177 | MODULE_DESCRIPTION("BD9571MWV Regulator driver"); | |
178 | MODULE_LICENSE("GPL v2"); |