1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * Broadcom BCM590xx regulator driver |
4 | * |
5 | * Copyright 2014 Linaro Limited |
6 | * Author: Matt Porter <mporter@linaro.org> |
7 | */ |
8 | |
9 | #include <linux/err.h> |
10 | #include <linux/init.h> |
11 | #include <linux/kernel.h> |
12 | #include <linux/mfd/bcm590xx.h> |
13 | #include <linux/module.h> |
14 | #include <linux/of.h> |
15 | #include <linux/platform_device.h> |
16 | #include <linux/regulator/driver.h> |
17 | #include <linux/regulator/machine.h> |
18 | #include <linux/regulator/of_regulator.h> |
19 | #include <linux/slab.h> |
20 | |
21 | /* I2C slave 0 registers */ |
22 | #define BCM590XX_RFLDOPMCTRL1 0x60 |
23 | #define BCM590XX_IOSR1PMCTRL1 0x7a |
24 | #define BCM590XX_IOSR2PMCTRL1 0x7c |
25 | #define BCM590XX_CSRPMCTRL1 0x7e |
26 | #define BCM590XX_SDSR1PMCTRL1 0x82 |
27 | #define BCM590XX_SDSR2PMCTRL1 0x86 |
28 | #define BCM590XX_MSRPMCTRL1 0x8a |
29 | #define BCM590XX_VSRPMCTRL1 0x8e |
30 | #define BCM590XX_RFLDOCTRL 0x96 |
31 | #define BCM590XX_CSRVOUT1 0xc0 |
32 | |
33 | /* I2C slave 1 registers */ |
34 | #define BCM590XX_GPLDO5PMCTRL1 0x16 |
35 | #define BCM590XX_GPLDO6PMCTRL1 0x18 |
36 | #define BCM590XX_GPLDO1CTRL 0x1a |
37 | #define BCM590XX_GPLDO2CTRL 0x1b |
38 | #define BCM590XX_GPLDO3CTRL 0x1c |
39 | #define BCM590XX_GPLDO4CTRL 0x1d |
40 | #define BCM590XX_GPLDO5CTRL 0x1e |
41 | #define BCM590XX_GPLDO6CTRL 0x1f |
42 | #define BCM590XX_OTG_CTRL 0x40 |
43 | #define BCM590XX_GPLDO1PMCTRL1 0x57 |
44 | #define BCM590XX_GPLDO2PMCTRL1 0x59 |
45 | #define BCM590XX_GPLDO3PMCTRL1 0x5b |
46 | #define BCM590XX_GPLDO4PMCTRL1 0x5d |
47 | |
48 | #define BCM590XX_REG_ENABLE BIT(7) |
49 | #define BCM590XX_VBUS_ENABLE BIT(2) |
50 | #define BCM590XX_LDO_VSEL_MASK GENMASK(5, 3) |
51 | #define BCM590XX_SR_VSEL_MASK GENMASK(5, 0) |
52 | |
53 | /* |
54 | * RFLDO to VSR regulators are |
55 | * accessed via I2C slave 0 |
56 | */ |
57 | |
58 | /* LDO regulator IDs */ |
59 | #define BCM590XX_REG_RFLDO 0 |
60 | #define BCM590XX_REG_CAMLDO1 1 |
61 | #define BCM590XX_REG_CAMLDO2 2 |
62 | #define BCM590XX_REG_SIMLDO1 3 |
63 | #define BCM590XX_REG_SIMLDO2 4 |
64 | #define BCM590XX_REG_SDLDO 5 |
65 | #define BCM590XX_REG_SDXLDO 6 |
66 | #define BCM590XX_REG_MMCLDO1 7 |
67 | #define BCM590XX_REG_MMCLDO2 8 |
68 | #define BCM590XX_REG_AUDLDO 9 |
69 | #define BCM590XX_REG_MICLDO 10 |
70 | #define BCM590XX_REG_USBLDO 11 |
71 | #define BCM590XX_REG_VIBLDO 12 |
72 | |
73 | /* DCDC regulator IDs */ |
74 | #define BCM590XX_REG_CSR 13 |
75 | #define BCM590XX_REG_IOSR1 14 |
76 | #define BCM590XX_REG_IOSR2 15 |
77 | #define BCM590XX_REG_MSR 16 |
78 | #define BCM590XX_REG_SDSR1 17 |
79 | #define BCM590XX_REG_SDSR2 18 |
80 | #define BCM590XX_REG_VSR 19 |
81 | |
82 | /* |
83 | * GPLDO1 to VBUS regulators are |
84 | * accessed via I2C slave 1 |
85 | */ |
86 | |
87 | #define BCM590XX_REG_GPLDO1 20 |
88 | #define BCM590XX_REG_GPLDO2 21 |
89 | #define BCM590XX_REG_GPLDO3 22 |
90 | #define BCM590XX_REG_GPLDO4 23 |
91 | #define BCM590XX_REG_GPLDO5 24 |
92 | #define BCM590XX_REG_GPLDO6 25 |
93 | #define BCM590XX_REG_VBUS 26 |
94 | |
95 | #define BCM590XX_NUM_REGS 27 |
96 | |
97 | #define BCM590XX_REG_IS_LDO(n) (n < BCM590XX_REG_CSR) |
98 | #define BCM590XX_REG_IS_GPLDO(n) \ |
99 | ((n > BCM590XX_REG_VSR) && (n < BCM590XX_REG_VBUS)) |
100 | #define BCM590XX_REG_IS_VBUS(n) (n == BCM590XX_REG_VBUS) |
101 | |
102 | /* LDO group A: supported voltages in microvolts */ |
103 | static const unsigned int ldo_a_table[] = { |
104 | 1200000, 1800000, 2500000, 2700000, 2800000, |
105 | 2900000, 3000000, 3300000, |
106 | }; |
107 | |
108 | /* LDO group C: supported voltages in microvolts */ |
109 | static const unsigned int ldo_c_table[] = { |
110 | 3100000, 1800000, 2500000, 2700000, 2800000, |
111 | 2900000, 3000000, 3300000, |
112 | }; |
113 | |
114 | static const unsigned int ldo_vbus[] = { |
115 | 5000000, |
116 | }; |
117 | |
118 | /* DCDC group CSR: supported voltages in microvolts */ |
119 | static const struct linear_range dcdc_csr_ranges[] = { |
120 | REGULATOR_LINEAR_RANGE(860000, 2, 50, 10000), |
121 | REGULATOR_LINEAR_RANGE(1360000, 51, 55, 20000), |
122 | REGULATOR_LINEAR_RANGE(900000, 56, 63, 0), |
123 | }; |
124 | |
125 | /* DCDC group IOSR1: supported voltages in microvolts */ |
126 | static const struct linear_range dcdc_iosr1_ranges[] = { |
127 | REGULATOR_LINEAR_RANGE(860000, 2, 51, 10000), |
128 | REGULATOR_LINEAR_RANGE(1500000, 52, 52, 0), |
129 | REGULATOR_LINEAR_RANGE(1800000, 53, 53, 0), |
130 | REGULATOR_LINEAR_RANGE(900000, 54, 63, 0), |
131 | }; |
132 | |
133 | /* DCDC group SDSR1: supported voltages in microvolts */ |
134 | static const struct linear_range dcdc_sdsr1_ranges[] = { |
135 | REGULATOR_LINEAR_RANGE(860000, 2, 50, 10000), |
136 | REGULATOR_LINEAR_RANGE(1340000, 51, 51, 0), |
137 | REGULATOR_LINEAR_RANGE(900000, 52, 63, 0), |
138 | }; |
139 | |
140 | struct bcm590xx_info { |
141 | const char *name; |
142 | const char *vin_name; |
143 | u8 n_voltages; |
144 | const unsigned int *volt_table; |
145 | u8 n_linear_ranges; |
146 | const struct linear_range *linear_ranges; |
147 | }; |
148 | |
149 | #define BCM590XX_REG_TABLE(_name, _table) \ |
150 | { \ |
151 | .name = #_name, \ |
152 | .n_voltages = ARRAY_SIZE(_table), \ |
153 | .volt_table = _table, \ |
154 | } |
155 | |
156 | #define BCM590XX_REG_RANGES(_name, _ranges) \ |
157 | { \ |
158 | .name = #_name, \ |
159 | .n_voltages = 64, \ |
160 | .n_linear_ranges = ARRAY_SIZE(_ranges), \ |
161 | .linear_ranges = _ranges, \ |
162 | } |
163 | |
164 | static struct bcm590xx_info bcm590xx_regs[] = { |
165 | BCM590XX_REG_TABLE(rfldo, ldo_a_table), |
166 | BCM590XX_REG_TABLE(camldo1, ldo_c_table), |
167 | BCM590XX_REG_TABLE(camldo2, ldo_c_table), |
168 | BCM590XX_REG_TABLE(simldo1, ldo_a_table), |
169 | BCM590XX_REG_TABLE(simldo2, ldo_a_table), |
170 | BCM590XX_REG_TABLE(sdldo, ldo_c_table), |
171 | BCM590XX_REG_TABLE(sdxldo, ldo_a_table), |
172 | BCM590XX_REG_TABLE(mmcldo1, ldo_a_table), |
173 | BCM590XX_REG_TABLE(mmcldo2, ldo_a_table), |
174 | BCM590XX_REG_TABLE(audldo, ldo_a_table), |
175 | BCM590XX_REG_TABLE(micldo, ldo_a_table), |
176 | BCM590XX_REG_TABLE(usbldo, ldo_a_table), |
177 | BCM590XX_REG_TABLE(vibldo, ldo_c_table), |
178 | BCM590XX_REG_RANGES(csr, dcdc_csr_ranges), |
179 | BCM590XX_REG_RANGES(iosr1, dcdc_iosr1_ranges), |
180 | BCM590XX_REG_RANGES(iosr2, dcdc_iosr1_ranges), |
181 | BCM590XX_REG_RANGES(msr, dcdc_iosr1_ranges), |
182 | BCM590XX_REG_RANGES(sdsr1, dcdc_sdsr1_ranges), |
183 | BCM590XX_REG_RANGES(sdsr2, dcdc_iosr1_ranges), |
184 | BCM590XX_REG_RANGES(vsr, dcdc_iosr1_ranges), |
185 | BCM590XX_REG_TABLE(gpldo1, ldo_a_table), |
186 | BCM590XX_REG_TABLE(gpldo2, ldo_a_table), |
187 | BCM590XX_REG_TABLE(gpldo3, ldo_a_table), |
188 | BCM590XX_REG_TABLE(gpldo4, ldo_a_table), |
189 | BCM590XX_REG_TABLE(gpldo5, ldo_a_table), |
190 | BCM590XX_REG_TABLE(gpldo6, ldo_a_table), |
191 | BCM590XX_REG_TABLE(vbus, ldo_vbus), |
192 | }; |
193 | |
194 | struct bcm590xx_reg { |
195 | struct regulator_desc *desc; |
196 | struct bcm590xx *mfd; |
197 | }; |
198 | |
199 | static int bcm590xx_get_vsel_register(int id) |
200 | { |
201 | if (BCM590XX_REG_IS_LDO(id)) |
202 | return BCM590XX_RFLDOCTRL + id; |
203 | else if (BCM590XX_REG_IS_GPLDO(id)) |
204 | return BCM590XX_GPLDO1CTRL + id; |
205 | else |
206 | return BCM590XX_CSRVOUT1 + (id - BCM590XX_REG_CSR) * 3; |
207 | } |
208 | |
209 | static int bcm590xx_get_enable_register(int id) |
210 | { |
211 | int reg = 0; |
212 | |
213 | if (BCM590XX_REG_IS_LDO(id)) |
214 | reg = BCM590XX_RFLDOPMCTRL1 + id * 2; |
215 | else if (BCM590XX_REG_IS_GPLDO(id)) |
216 | reg = BCM590XX_GPLDO1PMCTRL1 + id * 2; |
217 | else |
218 | switch (id) { |
219 | case BCM590XX_REG_CSR: |
220 | reg = BCM590XX_CSRPMCTRL1; |
221 | break; |
222 | case BCM590XX_REG_IOSR1: |
223 | reg = BCM590XX_IOSR1PMCTRL1; |
224 | break; |
225 | case BCM590XX_REG_IOSR2: |
226 | reg = BCM590XX_IOSR2PMCTRL1; |
227 | break; |
228 | case BCM590XX_REG_MSR: |
229 | reg = BCM590XX_MSRPMCTRL1; |
230 | break; |
231 | case BCM590XX_REG_SDSR1: |
232 | reg = BCM590XX_SDSR1PMCTRL1; |
233 | break; |
234 | case BCM590XX_REG_SDSR2: |
235 | reg = BCM590XX_SDSR2PMCTRL1; |
236 | break; |
237 | case BCM590XX_REG_VSR: |
238 | reg = BCM590XX_VSRPMCTRL1; |
239 | break; |
240 | case BCM590XX_REG_VBUS: |
241 | reg = BCM590XX_OTG_CTRL; |
242 | break; |
243 | } |
244 | |
245 | |
246 | return reg; |
247 | } |
248 | |
249 | static const struct regulator_ops bcm590xx_ops_ldo = { |
250 | .is_enabled = regulator_is_enabled_regmap, |
251 | .enable = regulator_enable_regmap, |
252 | .disable = regulator_disable_regmap, |
253 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
254 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
255 | .list_voltage = regulator_list_voltage_table, |
256 | .map_voltage = regulator_map_voltage_iterate, |
257 | }; |
258 | |
259 | static const struct regulator_ops bcm590xx_ops_dcdc = { |
260 | .is_enabled = regulator_is_enabled_regmap, |
261 | .enable = regulator_enable_regmap, |
262 | .disable = regulator_disable_regmap, |
263 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
264 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
265 | .list_voltage = regulator_list_voltage_linear_range, |
266 | .map_voltage = regulator_map_voltage_linear_range, |
267 | }; |
268 | |
269 | static const struct regulator_ops bcm590xx_ops_vbus = { |
270 | .is_enabled = regulator_is_enabled_regmap, |
271 | .enable = regulator_enable_regmap, |
272 | .disable = regulator_disable_regmap, |
273 | }; |
274 | |
275 | static int bcm590xx_probe(struct platform_device *pdev) |
276 | { |
277 | struct bcm590xx *bcm590xx = dev_get_drvdata(dev: pdev->dev.parent); |
278 | struct bcm590xx_reg *pmu; |
279 | struct regulator_config config = { }; |
280 | struct bcm590xx_info *info; |
281 | struct regulator_dev *rdev; |
282 | int i; |
283 | |
284 | pmu = devm_kzalloc(dev: &pdev->dev, size: sizeof(*pmu), GFP_KERNEL); |
285 | if (!pmu) |
286 | return -ENOMEM; |
287 | |
288 | pmu->mfd = bcm590xx; |
289 | |
290 | platform_set_drvdata(pdev, data: pmu); |
291 | |
292 | pmu->desc = devm_kcalloc(dev: &pdev->dev, |
293 | BCM590XX_NUM_REGS, |
294 | size: sizeof(struct regulator_desc), |
295 | GFP_KERNEL); |
296 | if (!pmu->desc) |
297 | return -ENOMEM; |
298 | |
299 | info = bcm590xx_regs; |
300 | |
301 | for (i = 0; i < BCM590XX_NUM_REGS; i++, info++) { |
302 | /* Register the regulators */ |
303 | pmu->desc[i].name = info->name; |
304 | pmu->desc[i].of_match = of_match_ptr(info->name); |
305 | pmu->desc[i].regulators_node = of_match_ptr("regulators" ); |
306 | pmu->desc[i].supply_name = info->vin_name; |
307 | pmu->desc[i].id = i; |
308 | pmu->desc[i].volt_table = info->volt_table; |
309 | pmu->desc[i].n_voltages = info->n_voltages; |
310 | pmu->desc[i].linear_ranges = info->linear_ranges; |
311 | pmu->desc[i].n_linear_ranges = info->n_linear_ranges; |
312 | |
313 | if ((BCM590XX_REG_IS_LDO(i)) || (BCM590XX_REG_IS_GPLDO(i))) { |
314 | pmu->desc[i].ops = &bcm590xx_ops_ldo; |
315 | pmu->desc[i].vsel_mask = BCM590XX_LDO_VSEL_MASK; |
316 | } else if (BCM590XX_REG_IS_VBUS(i)) |
317 | pmu->desc[i].ops = &bcm590xx_ops_vbus; |
318 | else { |
319 | pmu->desc[i].ops = &bcm590xx_ops_dcdc; |
320 | pmu->desc[i].vsel_mask = BCM590XX_SR_VSEL_MASK; |
321 | } |
322 | |
323 | if (BCM590XX_REG_IS_VBUS(i)) |
324 | pmu->desc[i].enable_mask = BCM590XX_VBUS_ENABLE; |
325 | else { |
326 | pmu->desc[i].vsel_reg = bcm590xx_get_vsel_register(id: i); |
327 | pmu->desc[i].enable_is_inverted = true; |
328 | pmu->desc[i].enable_mask = BCM590XX_REG_ENABLE; |
329 | } |
330 | pmu->desc[i].enable_reg = bcm590xx_get_enable_register(id: i); |
331 | pmu->desc[i].type = REGULATOR_VOLTAGE; |
332 | pmu->desc[i].owner = THIS_MODULE; |
333 | |
334 | config.dev = bcm590xx->dev; |
335 | config.driver_data = pmu; |
336 | if (BCM590XX_REG_IS_GPLDO(i) || BCM590XX_REG_IS_VBUS(i)) |
337 | config.regmap = bcm590xx->regmap_sec; |
338 | else |
339 | config.regmap = bcm590xx->regmap_pri; |
340 | |
341 | rdev = devm_regulator_register(dev: &pdev->dev, regulator_desc: &pmu->desc[i], |
342 | config: &config); |
343 | if (IS_ERR(ptr: rdev)) { |
344 | dev_err(bcm590xx->dev, |
345 | "failed to register %s regulator\n" , |
346 | pdev->name); |
347 | return PTR_ERR(ptr: rdev); |
348 | } |
349 | } |
350 | |
351 | return 0; |
352 | } |
353 | |
354 | static struct platform_driver bcm590xx_regulator_driver = { |
355 | .driver = { |
356 | .name = "bcm590xx-vregs" , |
357 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
358 | }, |
359 | .probe = bcm590xx_probe, |
360 | }; |
361 | module_platform_driver(bcm590xx_regulator_driver); |
362 | |
363 | MODULE_AUTHOR("Matt Porter <mporter@linaro.org>" ); |
364 | MODULE_DESCRIPTION("BCM590xx voltage regulator driver" ); |
365 | MODULE_LICENSE("GPL v2" ); |
366 | MODULE_ALIAS("platform:bcm590xx-vregs" ); |
367 | |