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a0db6b0a | 1 | // SPDX-License-Identifier: GPL-2.0 |
2 | // | |
3 | // Copyright (c) 2020 MediaTek Inc. | |
4 | ||
5 | #include <linux/err.h> | |
6 | #include <linux/init.h> | |
7 | #include <linux/module.h> | |
8 | #include <linux/platform_device.h> | |
9 | #include <linux/of_device.h> | |
10 | #include <linux/of_platform.h> | |
11 | #include <linux/regulator/driver.h> | |
12 | #include <linux/regulator/of_regulator.h> | |
13 | #include <linux/soc/mediatek/mtk_dvfsrc.h> | |
14 | ||
15 | #define DVFSRC_ID_VCORE 0 | |
16 | #define DVFSRC_ID_VSCP 1 | |
17 | ||
18 | #define MT_DVFSRC_REGULAR(match, _name, _volt_table) \ | |
19 | [DVFSRC_ID_##_name] = { \ | |
20 | .desc = { \ | |
21 | .name = match, \ | |
22 | .of_match = of_match_ptr(match), \ | |
23 | .ops = &dvfsrc_vcore_ops, \ | |
24 | .type = REGULATOR_VOLTAGE, \ | |
25 | .id = DVFSRC_ID_##_name, \ | |
26 | .owner = THIS_MODULE, \ | |
27 | .n_voltages = ARRAY_SIZE(_volt_table), \ | |
28 | .volt_table = _volt_table, \ | |
29 | }, \ | |
30 | } | |
31 | ||
32 | /* | |
33 | * DVFSRC regulators' information | |
34 | * | |
35 | * @desc: standard fields of regulator description. | |
36 | * @voltage_selector: Selector used for get_voltage_sel() and | |
37 | * set_voltage_sel() callbacks | |
38 | */ | |
39 | ||
40 | struct dvfsrc_regulator { | |
41 | struct regulator_desc desc; | |
42 | }; | |
43 | ||
44 | /* | |
45 | * MTK DVFSRC regulators' init data | |
46 | * | |
47 | * @size: num of regulators | |
48 | * @regulator_info: regulator info. | |
49 | */ | |
50 | struct dvfsrc_regulator_init_data { | |
51 | u32 size; | |
52 | struct dvfsrc_regulator *regulator_info; | |
53 | }; | |
54 | ||
55 | static inline struct device *to_dvfsrc_dev(struct regulator_dev *rdev) | |
56 | { | |
57 | return rdev_get_dev(rdev)->parent; | |
58 | } | |
59 | ||
60 | static int dvfsrc_set_voltage_sel(struct regulator_dev *rdev, | |
61 | unsigned int selector) | |
62 | { | |
63 | struct device *dvfsrc_dev = to_dvfsrc_dev(rdev); | |
64 | int id = rdev_get_id(rdev); | |
65 | ||
66 | if (id == DVFSRC_ID_VCORE) | |
67 | mtk_dvfsrc_send_request(dvfsrc_dev, | |
68 | MTK_DVFSRC_CMD_VCORE_REQUEST, | |
69 | selector); | |
70 | else if (id == DVFSRC_ID_VSCP) | |
71 | mtk_dvfsrc_send_request(dvfsrc_dev, | |
72 | MTK_DVFSRC_CMD_VSCP_REQUEST, | |
73 | selector); | |
74 | else | |
75 | return -EINVAL; | |
76 | ||
77 | return 0; | |
78 | } | |
79 | ||
80 | static int dvfsrc_get_voltage_sel(struct regulator_dev *rdev) | |
81 | { | |
82 | struct device *dvfsrc_dev = to_dvfsrc_dev(rdev); | |
83 | int id = rdev_get_id(rdev); | |
84 | int val, ret; | |
85 | ||
86 | if (id == DVFSRC_ID_VCORE) | |
87 | ret = mtk_dvfsrc_query_info(dvfsrc_dev, | |
88 | MTK_DVFSRC_CMD_VCORE_LEVEL_QUERY, | |
89 | &val); | |
90 | else if (id == DVFSRC_ID_VSCP) | |
91 | ret = mtk_dvfsrc_query_info(dvfsrc_dev, | |
92 | MTK_DVFSRC_CMD_VSCP_LEVEL_QUERY, | |
93 | &val); | |
94 | else | |
95 | return -EINVAL; | |
96 | ||
97 | if (ret != 0) | |
98 | return ret; | |
99 | ||
100 | return val; | |
101 | } | |
102 | ||
103 | static const struct regulator_ops dvfsrc_vcore_ops = { | |
104 | .list_voltage = regulator_list_voltage_table, | |
105 | .get_voltage_sel = dvfsrc_get_voltage_sel, | |
106 | .set_voltage_sel = dvfsrc_set_voltage_sel, | |
107 | }; | |
108 | ||
109 | static const unsigned int mt8183_voltages[] = { | |
110 | 725000, | |
111 | 800000, | |
112 | }; | |
113 | ||
114 | static struct dvfsrc_regulator mt8183_regulators[] = { | |
115 | MT_DVFSRC_REGULAR("dvfsrc-vcore", VCORE, | |
116 | mt8183_voltages), | |
117 | }; | |
118 | ||
119 | static const struct dvfsrc_regulator_init_data regulator_mt8183_data = { | |
120 | .size = ARRAY_SIZE(mt8183_regulators), | |
121 | .regulator_info = &mt8183_regulators[0], | |
122 | }; | |
123 | ||
124 | static const unsigned int mt6873_voltages[] = { | |
125 | 575000, | |
126 | 600000, | |
127 | 650000, | |
128 | 725000, | |
129 | }; | |
130 | ||
131 | static struct dvfsrc_regulator mt6873_regulators[] = { | |
132 | MT_DVFSRC_REGULAR("dvfsrc-vcore", VCORE, | |
133 | mt6873_voltages), | |
134 | MT_DVFSRC_REGULAR("dvfsrc-vscp", VSCP, | |
135 | mt6873_voltages), | |
136 | }; | |
137 | ||
138 | static const struct dvfsrc_regulator_init_data regulator_mt6873_data = { | |
139 | .size = ARRAY_SIZE(mt6873_regulators), | |
140 | .regulator_info = &mt6873_regulators[0], | |
141 | }; | |
142 | ||
143 | static const struct of_device_id mtk_dvfsrc_regulator_match[] = { | |
144 | { | |
145 | .compatible = "mediatek,mt8183-dvfsrc", | |
146 | .data = ®ulator_mt8183_data, | |
147 | }, { | |
148 | .compatible = "mediatek,mt8192-dvfsrc", | |
149 | .data = ®ulator_mt6873_data, | |
150 | }, { | |
151 | .compatible = "mediatek,mt6873-dvfsrc", | |
152 | .data = ®ulator_mt6873_data, | |
153 | }, { | |
154 | /* sentinel */ | |
155 | }, | |
156 | }; | |
157 | MODULE_DEVICE_TABLE(of, mtk_dvfsrc_regulator_match); | |
158 | ||
159 | static int dvfsrc_vcore_regulator_probe(struct platform_device *pdev) | |
160 | { | |
161 | const struct of_device_id *match; | |
162 | struct device *dev = &pdev->dev; | |
163 | struct regulator_config config = { }; | |
164 | struct regulator_dev *rdev; | |
165 | const struct dvfsrc_regulator_init_data *regulator_init_data; | |
166 | struct dvfsrc_regulator *mt_regulators; | |
167 | int i; | |
168 | ||
169 | match = of_match_node(mtk_dvfsrc_regulator_match, dev->parent->of_node); | |
170 | ||
171 | if (!match) { | |
172 | dev_err(dev, "invalid compatible string\n"); | |
173 | return -ENODEV; | |
174 | } | |
175 | ||
176 | regulator_init_data = match->data; | |
177 | ||
178 | mt_regulators = regulator_init_data->regulator_info; | |
179 | for (i = 0; i < regulator_init_data->size; i++) { | |
180 | config.dev = dev->parent; | |
181 | config.driver_data = (mt_regulators + i); | |
182 | rdev = devm_regulator_register(dev->parent, | |
183 | &(mt_regulators + i)->desc, | |
184 | &config); | |
185 | if (IS_ERR(rdev)) { | |
186 | dev_err(dev, "failed to register %s\n", | |
187 | (mt_regulators + i)->desc.name); | |
188 | return PTR_ERR(rdev); | |
189 | } | |
190 | } | |
191 | ||
192 | return 0; | |
193 | } | |
194 | ||
195 | static struct platform_driver mtk_dvfsrc_regulator_driver = { | |
196 | .driver = { | |
197 | .name = "mtk-dvfsrc-regulator", | |
198 | }, | |
199 | .probe = dvfsrc_vcore_regulator_probe, | |
200 | }; | |
201 | ||
202 | static int __init mtk_dvfsrc_regulator_init(void) | |
203 | { | |
204 | return platform_driver_register(&mtk_dvfsrc_regulator_driver); | |
205 | } | |
206 | subsys_initcall(mtk_dvfsrc_regulator_init); | |
207 | ||
208 | static void __exit mtk_dvfsrc_regulator_exit(void) | |
209 | { | |
210 | platform_driver_unregister(&mtk_dvfsrc_regulator_driver); | |
211 | } | |
212 | module_exit(mtk_dvfsrc_regulator_exit); | |
213 | ||
214 | MODULE_AUTHOR("Arvin wang <arvin.wang@mediatek.com>"); | |
215 | MODULE_LICENSE("GPL v2"); |