1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2019
4 * Texas Instruments Incorporated, <www.ti.com>
5 *
6 * Keerthy <j-keerthy@ti.com>
7 */
8
9 #include <common.h>
10 #include <fdtdec.h>
11 #include <errno.h>
12 #include <dm.h>
13 #include <i2c.h>
14 #include <log.h>
15 #include <linux/delay.h>
16 #include <power/pmic.h>
17 #include <power/regulator.h>
18 #include <power/tps65941.h>
19
20 static const char tps65941_buck_ctrl[TPS65941_BUCK_NUM] = {0x4, 0x6, 0x8, 0xA,
21 0xC};
22 static const char tps65941_buck_vout[TPS65941_BUCK_NUM] = {0xE, 0x10, 0x12,
23 0x14, 0x16};
24 static const char tps65941_ldo_ctrl[TPS65941_BUCK_NUM] = {0x1D, 0x1E, 0x1F,
25 0x20};
26 static const char tps65941_ldo_vout[TPS65941_BUCK_NUM] = {0x23, 0x24, 0x25,
27 0x26};
28
tps65941_buck_enable(struct udevice * dev,int op,bool * enable)29 static int tps65941_buck_enable(struct udevice *dev, int op, bool *enable)
30 {
31 int ret;
32 unsigned int adr;
33 struct dm_regulator_uclass_plat *uc_pdata;
34
35 uc_pdata = dev_get_uclass_plat(dev);
36 adr = uc_pdata->ctrl_reg;
37
38 ret = pmic_reg_read(dev->parent, adr);
39 if (ret < 0)
40 return ret;
41
42 if (op == PMIC_OP_GET) {
43 ret &= TPS65941_BUCK_MODE_MASK;
44
45 if (ret)
46 *enable = true;
47 else
48 *enable = false;
49
50 return 0;
51 } else if (op == PMIC_OP_SET) {
52 if (*enable)
53 ret |= TPS65941_BUCK_MODE_MASK;
54 else
55 ret &= ~TPS65941_BUCK_MODE_MASK;
56 ret = pmic_reg_write(dev->parent, adr, ret);
57 if (ret)
58 return ret;
59 }
60
61 return 0;
62 }
63
tps65941_buck_volt2val(int uV)64 static int tps65941_buck_volt2val(int uV)
65 {
66 if (uV > TPS65941_BUCK_VOLT_MAX)
67 return -EINVAL;
68 else if (uV > 1650000)
69 return (uV - 1660000) / 20000 + 0xAB;
70 else if (uV > 1110000)
71 return (uV - 1110000) / 10000 + 0x73;
72 else if (uV > 600000)
73 return (uV - 600000) / 5000 + 0x0F;
74 else if (uV >= 300000)
75 return (uV - 300000) / 20000 + 0x00;
76 else
77 return -EINVAL;
78 }
79
tps65941_buck_val2volt(int val)80 static int tps65941_buck_val2volt(int val)
81 {
82 if (val > TPS65941_BUCK_VOLT_MAX_HEX)
83 return -EINVAL;
84 else if (val > 0xAB)
85 return 1660000 + (val - 0xAB) * 20000;
86 else if (val > 0x73)
87 return 1100000 + (val - 0x73) * 10000;
88 else if (val > 0xF)
89 return 600000 + (val - 0xF) * 5000;
90 else if (val >= 0x0)
91 return 300000 + val * 5000;
92 else
93 return -EINVAL;
94 }
95
tps65941_lookup_slew(int id)96 int tps65941_lookup_slew(int id)
97 {
98 switch (id) {
99 case 0:
100 return 33000;
101 case 1:
102 return 20000;
103 case 2:
104 return 10000;
105 case 3:
106 return 5000;
107 case 4:
108 return 2500;
109 case 5:
110 return 1300;
111 case 6:
112 return 630;
113 case 7:
114 return 310;
115 default:
116 return -1;
117 }
118 }
119
tps65941_buck_val(struct udevice * dev,int op,int * uV)120 static int tps65941_buck_val(struct udevice *dev, int op, int *uV)
121 {
122 unsigned int hex, adr;
123 int ret, delta, uwait, slew;
124 struct dm_regulator_uclass_plat *uc_pdata;
125
126 uc_pdata = dev_get_uclass_plat(dev);
127
128 if (op == PMIC_OP_GET)
129 *uV = 0;
130
131 adr = uc_pdata->volt_reg;
132
133 ret = pmic_reg_read(dev->parent, adr);
134 if (ret < 0)
135 return ret;
136
137 ret &= TPS65941_BUCK_VOLT_MASK;
138 ret = tps65941_buck_val2volt(ret);
139 if (ret < 0)
140 return ret;
141
142 if (op == PMIC_OP_GET) {
143 *uV = ret;
144 return 0;
145 }
146
147 /*
148 * Compute the delta voltage, find the slew rate and wait
149 * for the appropriate amount of time after voltage switch
150 */
151 if (*uV > ret)
152 delta = *uV - ret;
153 else
154 delta = ret - *uV;
155
156 slew = pmic_reg_read(dev->parent, uc_pdata->ctrl_reg + 1);
157 if (slew < 0)
158 return ret;
159
160 slew &= TP65941_BUCK_CONF_SLEW_MASK;
161 slew = tps65941_lookup_slew(slew);
162 if (slew <= 0)
163 return ret;
164
165 uwait = delta / slew;
166
167 hex = tps65941_buck_volt2val(*uV);
168 if (hex < 0)
169 return hex;
170
171 ret &= 0x0;
172 ret = hex;
173
174 ret = pmic_reg_write(dev->parent, adr, ret);
175
176 udelay(uwait);
177
178 return ret;
179 }
180
tps65941_ldo_enable(struct udevice * dev,int op,bool * enable)181 static int tps65941_ldo_enable(struct udevice *dev, int op, bool *enable)
182 {
183 int ret;
184 unsigned int adr;
185 struct dm_regulator_uclass_plat *uc_pdata;
186
187 uc_pdata = dev_get_uclass_plat(dev);
188 adr = uc_pdata->ctrl_reg;
189
190 ret = pmic_reg_read(dev->parent, adr);
191 if (ret < 0)
192 return ret;
193
194 if (op == PMIC_OP_GET) {
195 ret &= TPS65941_LDO_MODE_MASK;
196
197 if (ret)
198 *enable = true;
199 else
200 *enable = false;
201
202 return 0;
203 } else if (op == PMIC_OP_SET) {
204 if (*enable)
205 ret |= TPS65941_LDO_MODE_MASK;
206 else
207 ret &= ~TPS65941_LDO_MODE_MASK;
208 ret = pmic_reg_write(dev->parent, adr, ret);
209 if (ret)
210 return ret;
211 }
212
213 return 0;
214 }
215
tps65941_ldo_val2volt(int val)216 static int tps65941_ldo_val2volt(int val)
217 {
218 if (val > TPS65941_LDO_VOLT_MAX_HEX || val < TPS65941_LDO_VOLT_MIN_HEX)
219 return -EINVAL;
220 else if (val >= TPS65941_LDO_VOLT_MIN_HEX)
221 return 600000 + (val - TPS65941_LDO_VOLT_MIN_HEX) * 50000;
222 else
223 return -EINVAL;
224 }
225
tps65941_ldo_val(struct udevice * dev,int op,int * uV)226 static int tps65941_ldo_val(struct udevice *dev, int op, int *uV)
227 {
228 unsigned int hex, adr;
229 int ret;
230 struct dm_regulator_uclass_plat *uc_pdata;
231
232 uc_pdata = dev_get_uclass_plat(dev);
233
234 if (op == PMIC_OP_GET)
235 *uV = 0;
236
237 adr = uc_pdata->volt_reg;
238
239 ret = pmic_reg_read(dev->parent, adr);
240 if (ret < 0)
241 return ret;
242
243 ret &= TPS65941_LDO_VOLT_MASK;
244 ret = tps65941_ldo_val2volt(ret);
245 if (ret < 0)
246 return ret;
247
248 if (op == PMIC_OP_GET) {
249 *uV = ret;
250 return 0;
251 }
252
253 hex = tps65941_buck_volt2val(*uV);
254 if (hex < 0)
255 return hex;
256
257 ret &= 0x0;
258 ret = hex;
259
260 ret = pmic_reg_write(dev->parent, adr, ret);
261
262 return ret;
263 }
264
tps65941_ldo_probe(struct udevice * dev)265 static int tps65941_ldo_probe(struct udevice *dev)
266 {
267 struct dm_regulator_uclass_plat *uc_pdata;
268 int idx;
269
270 uc_pdata = dev_get_uclass_plat(dev);
271 uc_pdata->type = REGULATOR_TYPE_LDO;
272
273 idx = dev->driver_data;
274 if (idx == 1 || idx == 2 || idx == 3 || idx == 4) {
275 debug("Single phase regulator\n");
276 } else {
277 printf("Wrong ID for regulator\n");
278 return -EINVAL;
279 }
280
281 uc_pdata->ctrl_reg = tps65941_ldo_ctrl[idx - 1];
282 uc_pdata->volt_reg = tps65941_ldo_vout[idx - 1];
283
284 return 0;
285 }
286
tps65941_buck_probe(struct udevice * dev)287 static int tps65941_buck_probe(struct udevice *dev)
288 {
289 struct dm_regulator_uclass_plat *uc_pdata;
290 int idx;
291
292 uc_pdata = dev_get_uclass_plat(dev);
293 uc_pdata->type = REGULATOR_TYPE_BUCK;
294
295 idx = dev->driver_data;
296 if (idx == 1 || idx == 2 || idx == 3 || idx == 4 || idx == 5) {
297 debug("Single phase regulator\n");
298 } else if (idx == 12) {
299 idx = 1;
300 } else if (idx == 34) {
301 idx = 3;
302 } else if (idx == 1234) {
303 idx = 1;
304 } else {
305 printf("Wrong ID for regulator\n");
306 return -EINVAL;
307 }
308
309 uc_pdata->ctrl_reg = tps65941_buck_ctrl[idx - 1];
310 uc_pdata->volt_reg = tps65941_buck_vout[idx - 1];
311
312 return 0;
313 }
314
ldo_get_value(struct udevice * dev)315 static int ldo_get_value(struct udevice *dev)
316 {
317 int uV;
318 int ret;
319
320 ret = tps65941_ldo_val(dev, PMIC_OP_GET, &uV);
321 if (ret)
322 return ret;
323
324 return uV;
325 }
326
ldo_set_value(struct udevice * dev,int uV)327 static int ldo_set_value(struct udevice *dev, int uV)
328 {
329 return tps65941_ldo_val(dev, PMIC_OP_SET, &uV);
330 }
331
ldo_get_enable(struct udevice * dev)332 static int ldo_get_enable(struct udevice *dev)
333 {
334 bool enable = false;
335 int ret;
336
337 ret = tps65941_ldo_enable(dev, PMIC_OP_GET, &enable);
338 if (ret)
339 return ret;
340
341 return enable;
342 }
343
ldo_set_enable(struct udevice * dev,bool enable)344 static int ldo_set_enable(struct udevice *dev, bool enable)
345 {
346 return tps65941_ldo_enable(dev, PMIC_OP_SET, &enable);
347 }
348
buck_get_value(struct udevice * dev)349 static int buck_get_value(struct udevice *dev)
350 {
351 int uV;
352 int ret;
353
354 ret = tps65941_buck_val(dev, PMIC_OP_GET, &uV);
355 if (ret)
356 return ret;
357
358 return uV;
359 }
360
buck_set_value(struct udevice * dev,int uV)361 static int buck_set_value(struct udevice *dev, int uV)
362 {
363 return tps65941_buck_val(dev, PMIC_OP_SET, &uV);
364 }
365
buck_get_enable(struct udevice * dev)366 static int buck_get_enable(struct udevice *dev)
367 {
368 bool enable = false;
369 int ret;
370
371 ret = tps65941_buck_enable(dev, PMIC_OP_GET, &enable);
372 if (ret)
373 return ret;
374
375 return enable;
376 }
377
buck_set_enable(struct udevice * dev,bool enable)378 static int buck_set_enable(struct udevice *dev, bool enable)
379 {
380 return tps65941_buck_enable(dev, PMIC_OP_SET, &enable);
381 }
382
383 static const struct dm_regulator_ops tps65941_ldo_ops = {
384 .get_value = ldo_get_value,
385 .set_value = ldo_set_value,
386 .get_enable = ldo_get_enable,
387 .set_enable = ldo_set_enable,
388 };
389
390 U_BOOT_DRIVER(tps65941_ldo) = {
391 .name = TPS65941_LDO_DRIVER,
392 .id = UCLASS_REGULATOR,
393 .ops = &tps65941_ldo_ops,
394 .probe = tps65941_ldo_probe,
395 };
396
397 static const struct dm_regulator_ops tps65941_buck_ops = {
398 .get_value = buck_get_value,
399 .set_value = buck_set_value,
400 .get_enable = buck_get_enable,
401 .set_enable = buck_set_enable,
402 };
403
404 U_BOOT_DRIVER(tps65941_buck) = {
405 .name = TPS65941_BUCK_DRIVER,
406 .id = UCLASS_REGULATOR,
407 .ops = &tps65941_buck_ops,
408 .probe = tps65941_buck_probe,
409 };
410