1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * tps65218-regulator.c |
4 | * |
5 | * Regulator driver for TPS65218 PMIC |
6 | * |
7 | * Copyright (C) 2014 Texas Instruments Incorporated - https://www.ti.com/ |
8 | */ |
9 | |
10 | #include <linux/kernel.h> |
11 | #include <linux/mod_devicetable.h> |
12 | #include <linux/module.h> |
13 | #include <linux/device.h> |
14 | #include <linux/init.h> |
15 | #include <linux/err.h> |
16 | #include <linux/platform_device.h> |
17 | #include <linux/regmap.h> |
18 | #include <linux/regulator/of_regulator.h> |
19 | #include <linux/regulator/driver.h> |
20 | #include <linux/regulator/machine.h> |
21 | #include <linux/mfd/tps65218.h> |
22 | |
23 | #define TPS65218_REGULATOR(_name, _of, _id, _type, _ops, _n, _vr, _vm, _er, \ |
24 | _em, _cr, _cm, _lr, _nlr, _delay, _fuv, _sr, _sm, \ |
25 | _ct, _ncl) \ |
26 | { \ |
27 | .name = _name, \ |
28 | .of_match = _of, \ |
29 | .id = _id, \ |
30 | .ops = &_ops, \ |
31 | .n_voltages = _n, \ |
32 | .type = _type, \ |
33 | .owner = THIS_MODULE, \ |
34 | .vsel_reg = _vr, \ |
35 | .vsel_mask = _vm, \ |
36 | .csel_reg = _cr, \ |
37 | .csel_mask = _cm, \ |
38 | .curr_table = _ct, \ |
39 | .n_current_limits = _ncl, \ |
40 | .enable_reg = _er, \ |
41 | .enable_mask = _em, \ |
42 | .volt_table = NULL, \ |
43 | .linear_ranges = _lr, \ |
44 | .n_linear_ranges = _nlr, \ |
45 | .ramp_delay = _delay, \ |
46 | .fixed_uV = _fuv, \ |
47 | .bypass_reg = _sr, \ |
48 | .bypass_mask = _sm, \ |
49 | } \ |
50 | |
51 | static const struct linear_range dcdc1_dcdc2_ranges[] = { |
52 | REGULATOR_LINEAR_RANGE(850000, 0x0, 0x32, 10000), |
53 | REGULATOR_LINEAR_RANGE(1375000, 0x33, 0x3f, 25000), |
54 | }; |
55 | |
56 | static const struct linear_range ldo1_dcdc3_ranges[] = { |
57 | REGULATOR_LINEAR_RANGE(900000, 0x0, 0x1a, 25000), |
58 | REGULATOR_LINEAR_RANGE(1600000, 0x1b, 0x3f, 50000), |
59 | }; |
60 | |
61 | static const struct linear_range dcdc4_ranges[] = { |
62 | REGULATOR_LINEAR_RANGE(1175000, 0x0, 0xf, 25000), |
63 | REGULATOR_LINEAR_RANGE(1600000, 0x10, 0x34, 50000), |
64 | }; |
65 | |
66 | static int tps65218_pmic_set_voltage_sel(struct regulator_dev *dev, |
67 | unsigned selector) |
68 | { |
69 | int ret; |
70 | struct tps65218 *tps = rdev_get_drvdata(rdev: dev); |
71 | unsigned int rid = rdev_get_id(rdev: dev); |
72 | |
73 | /* Set the voltage based on vsel value and write protect level is 2 */ |
74 | ret = tps65218_set_bits(tps, reg: dev->desc->vsel_reg, mask: dev->desc->vsel_mask, |
75 | val: selector, TPS65218_PROTECT_L1); |
76 | |
77 | /* Set GO bit for DCDC1/2 to initiate voltage transistion */ |
78 | switch (rid) { |
79 | case TPS65218_DCDC_1: |
80 | case TPS65218_DCDC_2: |
81 | ret = tps65218_set_bits(tps, TPS65218_REG_CONTRL_SLEW_RATE, |
82 | TPS65218_SLEW_RATE_GO, |
83 | TPS65218_SLEW_RATE_GO, |
84 | TPS65218_PROTECT_L1); |
85 | break; |
86 | } |
87 | |
88 | return ret; |
89 | } |
90 | |
91 | static int tps65218_pmic_enable(struct regulator_dev *dev) |
92 | { |
93 | struct tps65218 *tps = rdev_get_drvdata(rdev: dev); |
94 | int rid = rdev_get_id(rdev: dev); |
95 | |
96 | if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1) |
97 | return -EINVAL; |
98 | |
99 | /* Enable the regulator and password protection is level 1 */ |
100 | return tps65218_set_bits(tps, reg: dev->desc->enable_reg, |
101 | mask: dev->desc->enable_mask, val: dev->desc->enable_mask, |
102 | TPS65218_PROTECT_L1); |
103 | } |
104 | |
105 | static int tps65218_pmic_disable(struct regulator_dev *dev) |
106 | { |
107 | struct tps65218 *tps = rdev_get_drvdata(rdev: dev); |
108 | int rid = rdev_get_id(rdev: dev); |
109 | |
110 | if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1) |
111 | return -EINVAL; |
112 | |
113 | /* Disable the regulator and password protection is level 1 */ |
114 | return tps65218_clear_bits(tps, reg: dev->desc->enable_reg, |
115 | mask: dev->desc->enable_mask, TPS65218_PROTECT_L1); |
116 | } |
117 | |
118 | static int tps65218_pmic_set_suspend_enable(struct regulator_dev *dev) |
119 | { |
120 | struct tps65218 *tps = rdev_get_drvdata(rdev: dev); |
121 | unsigned int rid = rdev_get_id(rdev: dev); |
122 | |
123 | if (rid > TPS65218_LDO_1) |
124 | return -EINVAL; |
125 | |
126 | return tps65218_clear_bits(tps, reg: dev->desc->bypass_reg, |
127 | mask: dev->desc->bypass_mask, |
128 | TPS65218_PROTECT_L1); |
129 | } |
130 | |
131 | static int tps65218_pmic_set_suspend_disable(struct regulator_dev *dev) |
132 | { |
133 | struct tps65218 *tps = rdev_get_drvdata(rdev: dev); |
134 | unsigned int rid = rdev_get_id(rdev: dev); |
135 | |
136 | if (rid > TPS65218_LDO_1) |
137 | return -EINVAL; |
138 | |
139 | /* |
140 | * Certain revisions of TPS65218 will need to have DCDC3 regulator |
141 | * enabled always, otherwise an immediate system reboot will occur |
142 | * during poweroff. |
143 | */ |
144 | if (rid == TPS65218_DCDC_3 && tps->rev == TPS65218_REV_2_1) |
145 | return 0; |
146 | |
147 | if (!tps->strobes[rid]) { |
148 | if (rid == TPS65218_DCDC_3) |
149 | tps->strobes[rid] = 3; |
150 | else |
151 | return -EINVAL; |
152 | } |
153 | |
154 | return tps65218_set_bits(tps, reg: dev->desc->bypass_reg, |
155 | mask: dev->desc->bypass_mask, |
156 | val: tps->strobes[rid], TPS65218_PROTECT_L1); |
157 | } |
158 | |
159 | /* Operations permitted on DCDC1, DCDC2 */ |
160 | static const struct regulator_ops tps65218_dcdc12_ops = { |
161 | .is_enabled = regulator_is_enabled_regmap, |
162 | .enable = tps65218_pmic_enable, |
163 | .disable = tps65218_pmic_disable, |
164 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
165 | .set_voltage_sel = tps65218_pmic_set_voltage_sel, |
166 | .list_voltage = regulator_list_voltage_linear_range, |
167 | .map_voltage = regulator_map_voltage_linear_range, |
168 | .set_voltage_time_sel = regulator_set_voltage_time_sel, |
169 | .set_suspend_enable = tps65218_pmic_set_suspend_enable, |
170 | .set_suspend_disable = tps65218_pmic_set_suspend_disable, |
171 | }; |
172 | |
173 | /* Operations permitted on DCDC3, DCDC4 and LDO1 */ |
174 | static const struct regulator_ops tps65218_ldo1_dcdc34_ops = { |
175 | .is_enabled = regulator_is_enabled_regmap, |
176 | .enable = tps65218_pmic_enable, |
177 | .disable = tps65218_pmic_disable, |
178 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
179 | .set_voltage_sel = tps65218_pmic_set_voltage_sel, |
180 | .list_voltage = regulator_list_voltage_linear_range, |
181 | .map_voltage = regulator_map_voltage_linear_range, |
182 | .set_suspend_enable = tps65218_pmic_set_suspend_enable, |
183 | .set_suspend_disable = tps65218_pmic_set_suspend_disable, |
184 | }; |
185 | |
186 | static const unsigned int ls3_currents[] = { 100000, 200000, 500000, 1000000 }; |
187 | |
188 | static int tps65218_pmic_set_input_current_lim(struct regulator_dev *dev, |
189 | int lim_uA) |
190 | { |
191 | unsigned int index = 0; |
192 | unsigned int num_currents = ARRAY_SIZE(ls3_currents); |
193 | struct tps65218 *tps = rdev_get_drvdata(rdev: dev); |
194 | |
195 | while (index < num_currents && ls3_currents[index] != lim_uA) |
196 | index++; |
197 | |
198 | if (index == num_currents) |
199 | return -EINVAL; |
200 | |
201 | return tps65218_set_bits(tps, reg: dev->desc->csel_reg, mask: dev->desc->csel_mask, |
202 | val: index << __builtin_ctz(dev->desc->csel_mask), |
203 | TPS65218_PROTECT_L1); |
204 | } |
205 | |
206 | static int tps65218_pmic_set_current_limit(struct regulator_dev *dev, |
207 | int min_uA, int max_uA) |
208 | { |
209 | int index = 0; |
210 | unsigned int num_currents = ARRAY_SIZE(ls3_currents); |
211 | struct tps65218 *tps = rdev_get_drvdata(rdev: dev); |
212 | |
213 | while (index < num_currents && ls3_currents[index] <= max_uA) |
214 | index++; |
215 | |
216 | index--; |
217 | |
218 | if (index < 0 || ls3_currents[index] < min_uA) |
219 | return -EINVAL; |
220 | |
221 | return tps65218_set_bits(tps, reg: dev->desc->csel_reg, mask: dev->desc->csel_mask, |
222 | val: index << __builtin_ctz(dev->desc->csel_mask), |
223 | TPS65218_PROTECT_L1); |
224 | } |
225 | |
226 | static const struct regulator_ops tps65218_ls23_ops = { |
227 | .is_enabled = regulator_is_enabled_regmap, |
228 | .enable = tps65218_pmic_enable, |
229 | .disable = tps65218_pmic_disable, |
230 | .set_input_current_limit = tps65218_pmic_set_input_current_lim, |
231 | .set_current_limit = tps65218_pmic_set_current_limit, |
232 | .get_current_limit = regulator_get_current_limit_regmap, |
233 | }; |
234 | |
235 | /* Operations permitted on DCDC5, DCDC6 */ |
236 | static const struct regulator_ops tps65218_dcdc56_pmic_ops = { |
237 | .is_enabled = regulator_is_enabled_regmap, |
238 | .enable = tps65218_pmic_enable, |
239 | .disable = tps65218_pmic_disable, |
240 | .set_suspend_enable = tps65218_pmic_set_suspend_enable, |
241 | .set_suspend_disable = tps65218_pmic_set_suspend_disable, |
242 | }; |
243 | |
244 | static const struct regulator_desc regulators[] = { |
245 | TPS65218_REGULATOR("DCDC1" , "regulator-dcdc1" , TPS65218_DCDC_1, |
246 | REGULATOR_VOLTAGE, tps65218_dcdc12_ops, 64, |
247 | TPS65218_REG_CONTROL_DCDC1, |
248 | TPS65218_CONTROL_DCDC1_MASK, TPS65218_REG_ENABLE1, |
249 | TPS65218_ENABLE1_DC1_EN, 0, 0, dcdc1_dcdc2_ranges, |
250 | 2, 4000, 0, TPS65218_REG_SEQ3, |
251 | TPS65218_SEQ3_DC1_SEQ_MASK, NULL, 0), |
252 | TPS65218_REGULATOR("DCDC2" , "regulator-dcdc2" , TPS65218_DCDC_2, |
253 | REGULATOR_VOLTAGE, tps65218_dcdc12_ops, 64, |
254 | TPS65218_REG_CONTROL_DCDC2, |
255 | TPS65218_CONTROL_DCDC2_MASK, TPS65218_REG_ENABLE1, |
256 | TPS65218_ENABLE1_DC2_EN, 0, 0, dcdc1_dcdc2_ranges, |
257 | 2, 4000, 0, TPS65218_REG_SEQ3, |
258 | TPS65218_SEQ3_DC2_SEQ_MASK, NULL, 0), |
259 | TPS65218_REGULATOR("DCDC3" , "regulator-dcdc3" , TPS65218_DCDC_3, |
260 | REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 64, |
261 | TPS65218_REG_CONTROL_DCDC3, |
262 | TPS65218_CONTROL_DCDC3_MASK, TPS65218_REG_ENABLE1, |
263 | TPS65218_ENABLE1_DC3_EN, 0, 0, ldo1_dcdc3_ranges, 2, |
264 | 0, 0, TPS65218_REG_SEQ4, TPS65218_SEQ4_DC3_SEQ_MASK, |
265 | NULL, 0), |
266 | TPS65218_REGULATOR("DCDC4" , "regulator-dcdc4" , TPS65218_DCDC_4, |
267 | REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 53, |
268 | TPS65218_REG_CONTROL_DCDC4, |
269 | TPS65218_CONTROL_DCDC4_MASK, TPS65218_REG_ENABLE1, |
270 | TPS65218_ENABLE1_DC4_EN, 0, 0, dcdc4_ranges, 2, |
271 | 0, 0, TPS65218_REG_SEQ4, TPS65218_SEQ4_DC4_SEQ_MASK, |
272 | NULL, 0), |
273 | TPS65218_REGULATOR("DCDC5" , "regulator-dcdc5" , TPS65218_DCDC_5, |
274 | REGULATOR_VOLTAGE, tps65218_dcdc56_pmic_ops, 1, -1, |
275 | -1, TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC5_EN, 0, |
276 | 0, NULL, 0, 0, 1000000, TPS65218_REG_SEQ5, |
277 | TPS65218_SEQ5_DC5_SEQ_MASK, NULL, 0), |
278 | TPS65218_REGULATOR("DCDC6" , "regulator-dcdc6" , TPS65218_DCDC_6, |
279 | REGULATOR_VOLTAGE, tps65218_dcdc56_pmic_ops, 1, -1, |
280 | -1, TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC6_EN, 0, |
281 | 0, NULL, 0, 0, 1800000, TPS65218_REG_SEQ5, |
282 | TPS65218_SEQ5_DC6_SEQ_MASK, NULL, 0), |
283 | TPS65218_REGULATOR("LDO1" , "regulator-ldo1" , TPS65218_LDO_1, |
284 | REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 64, |
285 | TPS65218_REG_CONTROL_LDO1, |
286 | TPS65218_CONTROL_LDO1_MASK, TPS65218_REG_ENABLE2, |
287 | TPS65218_ENABLE2_LDO1_EN, 0, 0, ldo1_dcdc3_ranges, |
288 | 2, 0, 0, TPS65218_REG_SEQ6, |
289 | TPS65218_SEQ6_LDO1_SEQ_MASK, NULL, 0), |
290 | TPS65218_REGULATOR("LS2" , "regulator-ls2" , TPS65218_LS_2, |
291 | REGULATOR_CURRENT, tps65218_ls23_ops, 0, 0, 0, |
292 | TPS65218_REG_ENABLE2, TPS65218_ENABLE2_LS2_EN, |
293 | TPS65218_REG_CONFIG2, TPS65218_CONFIG2_LS2ILIM_MASK, |
294 | NULL, 0, 0, 0, 0, 0, ls3_currents, |
295 | ARRAY_SIZE(ls3_currents)), |
296 | TPS65218_REGULATOR("LS3" , "regulator-ls3" , TPS65218_LS_3, |
297 | REGULATOR_CURRENT, tps65218_ls23_ops, 0, 0, 0, |
298 | TPS65218_REG_ENABLE2, TPS65218_ENABLE2_LS3_EN, |
299 | TPS65218_REG_CONFIG2, TPS65218_CONFIG2_LS3ILIM_MASK, |
300 | NULL, 0, 0, 0, 0, 0, ls3_currents, |
301 | ARRAY_SIZE(ls3_currents)), |
302 | }; |
303 | |
304 | static int tps65218_regulator_probe(struct platform_device *pdev) |
305 | { |
306 | struct tps65218 *tps = dev_get_drvdata(dev: pdev->dev.parent); |
307 | struct regulator_dev *rdev; |
308 | struct regulator_config config = { }; |
309 | int i, ret; |
310 | unsigned int val; |
311 | |
312 | config.dev = &pdev->dev; |
313 | config.dev->of_node = tps->dev->of_node; |
314 | config.driver_data = tps; |
315 | config.regmap = tps->regmap; |
316 | |
317 | /* Allocate memory for strobes */ |
318 | tps->strobes = devm_kcalloc(dev: &pdev->dev, |
319 | TPS65218_NUM_REGULATOR, size: sizeof(u8), |
320 | GFP_KERNEL); |
321 | if (!tps->strobes) |
322 | return -ENOMEM; |
323 | |
324 | for (i = 0; i < ARRAY_SIZE(regulators); i++) { |
325 | rdev = devm_regulator_register(dev: &pdev->dev, regulator_desc: ®ulators[i], |
326 | config: &config); |
327 | if (IS_ERR(ptr: rdev)) { |
328 | dev_err(tps->dev, "failed to register %s regulator\n" , |
329 | pdev->name); |
330 | return PTR_ERR(ptr: rdev); |
331 | } |
332 | |
333 | ret = regmap_read(map: tps->regmap, reg: regulators[i].bypass_reg, val: &val); |
334 | if (ret) |
335 | return ret; |
336 | |
337 | tps->strobes[i] = val & regulators[i].bypass_mask; |
338 | } |
339 | |
340 | return 0; |
341 | } |
342 | |
343 | static const struct platform_device_id tps65218_regulator_id_table[] = { |
344 | { "tps65218-regulator" , }, |
345 | { /* sentinel */ } |
346 | }; |
347 | MODULE_DEVICE_TABLE(platform, tps65218_regulator_id_table); |
348 | |
349 | static struct platform_driver tps65218_regulator_driver = { |
350 | .driver = { |
351 | .name = "tps65218-pmic" , |
352 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
353 | }, |
354 | .probe = tps65218_regulator_probe, |
355 | .id_table = tps65218_regulator_id_table, |
356 | }; |
357 | |
358 | module_platform_driver(tps65218_regulator_driver); |
359 | |
360 | MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>" ); |
361 | MODULE_DESCRIPTION("TPS65218 voltage regulator driver" ); |
362 | MODULE_ALIAS("platform:tps65218-pmic" ); |
363 | MODULE_LICENSE("GPL v2" ); |
364 | |