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bbc7ba0f | 1 | // SPDX-License-Identifier: GPL-2.0 |
433c9bb7 EC |
2 | /* |
3 | * Copyright (C) 2017 Spreadtrum Communications Inc. | |
4 | */ | |
5 | ||
6 | #include <linux/module.h> | |
7 | #include <linux/of.h> | |
8 | #include <linux/platform_device.h> | |
9 | #include <linux/regmap.h> | |
10 | #include <linux/regulator/driver.h> | |
11 | #include <linux/regulator/of_regulator.h> | |
12 | ||
13 | /* | |
14 | * SC2731 regulator lock register | |
15 | */ | |
fa32f7a3 AL |
16 | #define SC2731_PWR_WR_PROT 0xf0c |
17 | #define SC2731_WR_UNLOCK_VALUE 0x6e7f | |
433c9bb7 EC |
18 | |
19 | /* | |
20 | * SC2731 enable register | |
21 | */ | |
22 | #define SC2731_POWER_PD_SW 0xc28 | |
23 | #define SC2731_LDO_CAMA0_PD 0xcfc | |
24 | #define SC2731_LDO_CAMA1_PD 0xd04 | |
25 | #define SC2731_LDO_CAMMOT_PD 0xd0c | |
26 | #define SC2731_LDO_VLDO_PD 0xd6c | |
27 | #define SC2731_LDO_EMMCCORE_PD 0xd2c | |
28 | #define SC2731_LDO_SDCORE_PD 0xd74 | |
29 | #define SC2731_LDO_SDIO_PD 0xd70 | |
30 | #define SC2731_LDO_WIFIPA_PD 0xd4c | |
31 | #define SC2731_LDO_USB33_PD 0xd5c | |
32 | #define SC2731_LDO_CAMD0_PD 0xd7c | |
33 | #define SC2731_LDO_CAMD1_PD 0xd84 | |
34 | #define SC2731_LDO_CON_PD 0xd8c | |
35 | #define SC2731_LDO_CAMIO_PD 0xd94 | |
36 | #define SC2731_LDO_SRAM_PD 0xd78 | |
37 | ||
38 | /* | |
39 | * SC2731 enable mask | |
40 | */ | |
41 | #define SC2731_DCDC_CPU0_PD_MASK BIT(4) | |
42 | #define SC2731_DCDC_CPU1_PD_MASK BIT(3) | |
43 | #define SC2731_DCDC_RF_PD_MASK BIT(11) | |
44 | #define SC2731_LDO_CAMA0_PD_MASK BIT(0) | |
45 | #define SC2731_LDO_CAMA1_PD_MASK BIT(0) | |
46 | #define SC2731_LDO_CAMMOT_PD_MASK BIT(0) | |
47 | #define SC2731_LDO_VLDO_PD_MASK BIT(0) | |
48 | #define SC2731_LDO_EMMCCORE_PD_MASK BIT(0) | |
49 | #define SC2731_LDO_SDCORE_PD_MASK BIT(0) | |
50 | #define SC2731_LDO_SDIO_PD_MASK BIT(0) | |
51 | #define SC2731_LDO_WIFIPA_PD_MASK BIT(0) | |
52 | #define SC2731_LDO_USB33_PD_MASK BIT(0) | |
53 | #define SC2731_LDO_CAMD0_PD_MASK BIT(0) | |
54 | #define SC2731_LDO_CAMD1_PD_MASK BIT(0) | |
55 | #define SC2731_LDO_CON_PD_MASK BIT(0) | |
56 | #define SC2731_LDO_CAMIO_PD_MASK BIT(0) | |
57 | #define SC2731_LDO_SRAM_PD_MASK BIT(0) | |
58 | ||
59 | /* | |
60 | * SC2731 vsel register | |
61 | */ | |
62 | #define SC2731_DCDC_CPU0_VOL 0xc54 | |
63 | #define SC2731_DCDC_CPU1_VOL 0xc64 | |
64 | #define SC2731_DCDC_RF_VOL 0xcb8 | |
65 | #define SC2731_LDO_CAMA0_VOL 0xd00 | |
66 | #define SC2731_LDO_CAMA1_VOL 0xd08 | |
67 | #define SC2731_LDO_CAMMOT_VOL 0xd10 | |
68 | #define SC2731_LDO_VLDO_VOL 0xd28 | |
69 | #define SC2731_LDO_EMMCCORE_VOL 0xd30 | |
70 | #define SC2731_LDO_SDCORE_VOL 0xd38 | |
71 | #define SC2731_LDO_SDIO_VOL 0xd40 | |
72 | #define SC2731_LDO_WIFIPA_VOL 0xd50 | |
73 | #define SC2731_LDO_USB33_VOL 0xd60 | |
74 | #define SC2731_LDO_CAMD0_VOL 0xd80 | |
75 | #define SC2731_LDO_CAMD1_VOL 0xd88 | |
76 | #define SC2731_LDO_CON_VOL 0xd90 | |
77 | #define SC2731_LDO_CAMIO_VOL 0xd98 | |
78 | #define SC2731_LDO_SRAM_VOL 0xdB0 | |
79 | ||
80 | /* | |
81 | * SC2731 vsel register mask | |
82 | */ | |
83 | #define SC2731_DCDC_CPU0_VOL_MASK GENMASK(8, 0) | |
84 | #define SC2731_DCDC_CPU1_VOL_MASK GENMASK(8, 0) | |
85 | #define SC2731_DCDC_RF_VOL_MASK GENMASK(8, 0) | |
86 | #define SC2731_LDO_CAMA0_VOL_MASK GENMASK(7, 0) | |
87 | #define SC2731_LDO_CAMA1_VOL_MASK GENMASK(7, 0) | |
88 | #define SC2731_LDO_CAMMOT_VOL_MASK GENMASK(7, 0) | |
89 | #define SC2731_LDO_VLDO_VOL_MASK GENMASK(7, 0) | |
90 | #define SC2731_LDO_EMMCCORE_VOL_MASK GENMASK(7, 0) | |
91 | #define SC2731_LDO_SDCORE_VOL_MASK GENMASK(7, 0) | |
92 | #define SC2731_LDO_SDIO_VOL_MASK GENMASK(7, 0) | |
93 | #define SC2731_LDO_WIFIPA_VOL_MASK GENMASK(7, 0) | |
94 | #define SC2731_LDO_USB33_VOL_MASK GENMASK(7, 0) | |
95 | #define SC2731_LDO_CAMD0_VOL_MASK GENMASK(6, 0) | |
96 | #define SC2731_LDO_CAMD1_VOL_MASK GENMASK(6, 0) | |
97 | #define SC2731_LDO_CON_VOL_MASK GENMASK(6, 0) | |
98 | #define SC2731_LDO_CAMIO_VOL_MASK GENMASK(6, 0) | |
99 | #define SC2731_LDO_SRAM_VOL_MASK GENMASK(6, 0) | |
100 | ||
101 | enum sc2731_regulator_id { | |
102 | SC2731_BUCK_CPU0, | |
103 | SC2731_BUCK_CPU1, | |
104 | SC2731_BUCK_RF, | |
105 | SC2731_LDO_CAMA0, | |
106 | SC2731_LDO_CAMA1, | |
107 | SC2731_LDO_CAMMOT, | |
108 | SC2731_LDO_VLDO, | |
109 | SC2731_LDO_EMMCCORE, | |
110 | SC2731_LDO_SDCORE, | |
111 | SC2731_LDO_SDIO, | |
112 | SC2731_LDO_WIFIPA, | |
113 | SC2731_LDO_USB33, | |
114 | SC2731_LDO_CAMD0, | |
115 | SC2731_LDO_CAMD1, | |
116 | SC2731_LDO_CON, | |
117 | SC2731_LDO_CAMIO, | |
118 | SC2731_LDO_SRAM, | |
119 | }; | |
120 | ||
121 | static const struct regulator_ops sc2731_regu_linear_ops = { | |
122 | .enable = regulator_enable_regmap, | |
123 | .disable = regulator_disable_regmap, | |
124 | .is_enabled = regulator_is_enabled_regmap, | |
125 | .list_voltage = regulator_list_voltage_linear, | |
126 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
127 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
128 | }; | |
129 | ||
130 | #define SC2731_REGU_LINEAR(_id, en_reg, en_mask, vreg, vmask, \ | |
131 | vstep, vmin, vmax) { \ | |
132 | .name = #_id, \ | |
133 | .of_match = of_match_ptr(#_id), \ | |
134 | .ops = &sc2731_regu_linear_ops, \ | |
135 | .type = REGULATOR_VOLTAGE, \ | |
136 | .id = SC2731_##_id, \ | |
137 | .owner = THIS_MODULE, \ | |
138 | .min_uV = vmin, \ | |
139 | .n_voltages = ((vmax) - (vmin)) / (vstep) + 1, \ | |
140 | .uV_step = vstep, \ | |
141 | .enable_is_inverted = true, \ | |
142 | .enable_val = 0, \ | |
143 | .enable_reg = en_reg, \ | |
144 | .enable_mask = en_mask, \ | |
145 | .vsel_reg = vreg, \ | |
146 | .vsel_mask = vmask, \ | |
147 | } | |
148 | ||
883ce242 | 149 | static const struct regulator_desc regulators[] = { |
433c9bb7 EC |
150 | SC2731_REGU_LINEAR(BUCK_CPU0, SC2731_POWER_PD_SW, |
151 | SC2731_DCDC_CPU0_PD_MASK, SC2731_DCDC_CPU0_VOL, | |
152 | SC2731_DCDC_CPU0_VOL_MASK, 3125, 400000, 1996875), | |
153 | SC2731_REGU_LINEAR(BUCK_CPU1, SC2731_POWER_PD_SW, | |
154 | SC2731_DCDC_CPU1_PD_MASK, SC2731_DCDC_CPU1_VOL, | |
155 | SC2731_DCDC_CPU1_VOL_MASK, 3125, 400000, 1996875), | |
156 | SC2731_REGU_LINEAR(BUCK_RF, SC2731_POWER_PD_SW, SC2731_DCDC_RF_PD_MASK, | |
157 | SC2731_DCDC_RF_VOL, SC2731_DCDC_RF_VOL_MASK, | |
158 | 3125, 600000, 2196875), | |
159 | SC2731_REGU_LINEAR(LDO_CAMA0, SC2731_LDO_CAMA0_PD, | |
160 | SC2731_LDO_CAMA0_PD_MASK, SC2731_LDO_CAMA0_VOL, | |
161 | SC2731_LDO_CAMA0_VOL_MASK, 10000, 1200000, 3750000), | |
162 | SC2731_REGU_LINEAR(LDO_CAMA1, SC2731_LDO_CAMA1_PD, | |
163 | SC2731_LDO_CAMA1_PD_MASK, SC2731_LDO_CAMA1_VOL, | |
164 | SC2731_LDO_CAMA1_VOL_MASK, 10000, 1200000, 3750000), | |
165 | SC2731_REGU_LINEAR(LDO_CAMMOT, SC2731_LDO_CAMMOT_PD, | |
166 | SC2731_LDO_CAMMOT_PD_MASK, SC2731_LDO_CAMMOT_VOL, | |
167 | SC2731_LDO_CAMMOT_VOL_MASK, 10000, 1200000, 3750000), | |
168 | SC2731_REGU_LINEAR(LDO_VLDO, SC2731_LDO_VLDO_PD, | |
169 | SC2731_LDO_VLDO_PD_MASK, SC2731_LDO_VLDO_VOL, | |
170 | SC2731_LDO_VLDO_VOL_MASK, 10000, 1200000, 3750000), | |
171 | SC2731_REGU_LINEAR(LDO_EMMCCORE, SC2731_LDO_EMMCCORE_PD, | |
172 | SC2731_LDO_EMMCCORE_PD_MASK, SC2731_LDO_EMMCCORE_VOL, | |
173 | SC2731_LDO_EMMCCORE_VOL_MASK, 10000, 1200000, | |
174 | 3750000), | |
175 | SC2731_REGU_LINEAR(LDO_SDCORE, SC2731_LDO_SDCORE_PD, | |
176 | SC2731_LDO_SDCORE_PD_MASK, SC2731_LDO_SDCORE_VOL, | |
177 | SC2731_LDO_SDCORE_VOL_MASK, 10000, 1200000, 3750000), | |
178 | SC2731_REGU_LINEAR(LDO_SDIO, SC2731_LDO_SDIO_PD, | |
179 | SC2731_LDO_SDIO_PD_MASK, SC2731_LDO_SDIO_VOL, | |
180 | SC2731_LDO_SDIO_VOL_MASK, 10000, 1200000, 3750000), | |
181 | SC2731_REGU_LINEAR(LDO_WIFIPA, SC2731_LDO_WIFIPA_PD, | |
182 | SC2731_LDO_WIFIPA_PD_MASK, SC2731_LDO_WIFIPA_VOL, | |
183 | SC2731_LDO_WIFIPA_VOL_MASK, 10000, 1200000, 3750000), | |
184 | SC2731_REGU_LINEAR(LDO_USB33, SC2731_LDO_USB33_PD, | |
185 | SC2731_LDO_USB33_PD_MASK, SC2731_LDO_USB33_VOL, | |
186 | SC2731_LDO_USB33_VOL_MASK, 10000, 1200000, 3750000), | |
187 | SC2731_REGU_LINEAR(LDO_CAMD0, SC2731_LDO_CAMD0_PD, | |
188 | SC2731_LDO_CAMD0_PD_MASK, SC2731_LDO_CAMD0_VOL, | |
189 | SC2731_LDO_CAMD0_VOL_MASK, 6250, 1000000, 1793750), | |
190 | SC2731_REGU_LINEAR(LDO_CAMD1, SC2731_LDO_CAMD1_PD, | |
191 | SC2731_LDO_CAMD1_PD_MASK, SC2731_LDO_CAMD1_VOL, | |
192 | SC2731_LDO_CAMD1_VOL_MASK, 6250, 1000000, 1793750), | |
193 | SC2731_REGU_LINEAR(LDO_CON, SC2731_LDO_CON_PD, | |
194 | SC2731_LDO_CON_PD_MASK, SC2731_LDO_CON_VOL, | |
195 | SC2731_LDO_CON_VOL_MASK, 6250, 1000000, 1793750), | |
196 | SC2731_REGU_LINEAR(LDO_CAMIO, SC2731_LDO_CAMIO_PD, | |
197 | SC2731_LDO_CAMIO_PD_MASK, SC2731_LDO_CAMIO_VOL, | |
198 | SC2731_LDO_CAMIO_VOL_MASK, 6250, 1000000, 1793750), | |
199 | SC2731_REGU_LINEAR(LDO_SRAM, SC2731_LDO_SRAM_PD, | |
200 | SC2731_LDO_SRAM_PD_MASK, SC2731_LDO_SRAM_VOL, | |
201 | SC2731_LDO_SRAM_VOL_MASK, 6250, 1000000, 1793750), | |
202 | }; | |
203 | ||
204 | static int sc2731_regulator_unlock(struct regmap *regmap) | |
205 | { | |
fa32f7a3 AL |
206 | return regmap_write(regmap, SC2731_PWR_WR_PROT, |
207 | SC2731_WR_UNLOCK_VALUE); | |
433c9bb7 EC |
208 | } |
209 | ||
210 | static int sc2731_regulator_probe(struct platform_device *pdev) | |
211 | { | |
212 | int i, ret; | |
213 | struct regmap *regmap; | |
214 | struct regulator_config config = { }; | |
215 | struct regulator_dev *rdev; | |
216 | ||
217 | regmap = dev_get_regmap(pdev->dev.parent, NULL); | |
218 | if (!regmap) { | |
219 | dev_err(&pdev->dev, "failed to get regmap.\n"); | |
220 | return -ENODEV; | |
221 | } | |
222 | ||
223 | ret = sc2731_regulator_unlock(regmap); | |
224 | if (ret) { | |
225 | dev_err(&pdev->dev, "failed to release regulator lock\n"); | |
226 | return ret; | |
227 | } | |
228 | ||
229 | config.dev = &pdev->dev; | |
230 | config.regmap = regmap; | |
231 | ||
232 | for (i = 0; i < ARRAY_SIZE(regulators); i++) { | |
233 | rdev = devm_regulator_register(&pdev->dev, ®ulators[i], | |
234 | &config); | |
235 | if (IS_ERR(rdev)) { | |
236 | dev_err(&pdev->dev, "failed to register regulator %s\n", | |
237 | regulators[i].name); | |
238 | return PTR_ERR(rdev); | |
239 | } | |
240 | } | |
241 | ||
242 | return 0; | |
243 | } | |
244 | ||
245 | static struct platform_driver sc2731_regulator_driver = { | |
246 | .driver = { | |
247 | .name = "sc27xx-regulator", | |
ed6962cc | 248 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
433c9bb7 EC |
249 | }, |
250 | .probe = sc2731_regulator_probe, | |
251 | }; | |
252 | ||
253 | module_platform_driver(sc2731_regulator_driver); | |
254 | ||
255 | MODULE_AUTHOR("Chen Junhui <erick.chen@spreadtrum.com>"); | |
256 | MODULE_DESCRIPTION("Spreadtrum SC2731 regulator driver"); | |
257 | MODULE_LICENSE("GPL v2"); |