1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Tegra124 DFLL FCPU clock source driver
4  *
5  * Copyright (C) 2012-2019 NVIDIA Corporation.  All rights reserved.
6  *
7  * Aleksandr Frid <afrid@nvidia.com>
8  * Paul Walmsley <pwalmsley@nvidia.com>
9  */
10 
11 #include <linux/cpu.h>
12 #include <linux/err.h>
13 #include <linux/kernel.h>
14 #include <linux/init.h>
15 #include <linux/of_device.h>
16 #include <linux/platform_device.h>
17 #include <linux/regulator/consumer.h>
18 #include <soc/tegra/fuse.h>
19 
20 #include "clk.h"
21 #include "clk-dfll.h"
22 #include "cvb.h"
23 
24 struct dfll_fcpu_data {
25 	const unsigned long *cpu_max_freq_table;
26 	unsigned int cpu_max_freq_table_size;
27 	const struct cvb_table *cpu_cvb_tables;
28 	unsigned int cpu_cvb_tables_size;
29 };
30 
31 /* Maximum CPU frequency, indexed by CPU speedo id */
32 static const unsigned long tegra124_cpu_max_freq_table[] = {
33 	[0] = 2014500000UL,
34 	[1] = 2320500000UL,
35 	[2] = 2116500000UL,
36 	[3] = 2524500000UL,
37 };
38 
39 static const struct cvb_table tegra124_cpu_cvb_tables[] = {
40 	{
41 		.speedo_id = -1,
42 		.process_id = -1,
43 		.min_millivolts = 900,
44 		.max_millivolts = 1260,
45 		.speedo_scale = 100,
46 		.voltage_scale = 1000,
47 		.entries = {
48 			{  204000000UL, { 1112619, -29295, 402 } },
49 			{  306000000UL, { 1150460, -30585, 402 } },
50 			{  408000000UL, { 1190122, -31865, 402 } },
51 			{  510000000UL, { 1231606, -33155, 402 } },
52 			{  612000000UL, { 1274912, -34435, 402 } },
53 			{  714000000UL, { 1320040, -35725, 402 } },
54 			{  816000000UL, { 1366990, -37005, 402 } },
55 			{  918000000UL, { 1415762, -38295, 402 } },
56 			{ 1020000000UL, { 1466355, -39575, 402 } },
57 			{ 1122000000UL, { 1518771, -40865, 402 } },
58 			{ 1224000000UL, { 1573009, -42145, 402 } },
59 			{ 1326000000UL, { 1629068, -43435, 402 } },
60 			{ 1428000000UL, { 1686950, -44715, 402 } },
61 			{ 1530000000UL, { 1746653, -46005, 402 } },
62 			{ 1632000000UL, { 1808179, -47285, 402 } },
63 			{ 1734000000UL, { 1871526, -48575, 402 } },
64 			{ 1836000000UL, { 1936696, -49855, 402 } },
65 			{ 1938000000UL, { 2003687, -51145, 402 } },
66 			{ 2014500000UL, { 2054787, -52095, 402 } },
67 			{ 2116500000UL, { 2124957, -53385, 402 } },
68 			{ 2218500000UL, { 2196950, -54665, 402 } },
69 			{ 2320500000UL, { 2270765, -55955, 402 } },
70 			{ 2422500000UL, { 2346401, -57235, 402 } },
71 			{ 2524500000UL, { 2437299, -58535, 402 } },
72 			{          0UL, {       0,      0,   0 } },
73 		},
74 		.cpu_dfll_data = {
75 			.tune0_low = 0x005020ff,
76 			.tune0_high = 0x005040ff,
77 			.tune1 = 0x00000060,
78 		}
79 	},
80 };
81 
82 static const unsigned long tegra210_cpu_max_freq_table[] = {
83 	[0] = 1912500000UL,
84 	[1] = 1912500000UL,
85 	[2] = 2218500000UL,
86 	[3] = 1785000000UL,
87 	[4] = 1632000000UL,
88 	[5] = 1912500000UL,
89 	[6] = 2014500000UL,
90 	[7] = 1734000000UL,
91 	[8] = 1683000000UL,
92 	[9] = 1555500000UL,
93 	[10] = 1504500000UL,
94 };
95 
96 #define CPU_CVB_TABLE \
97 	.speedo_scale = 100,	\
98 	.voltage_scale = 1000,	\
99 	.entries = {		\
100 		{  204000000UL,	{ 1007452, -23865, 370 } }, \
101 		{  306000000UL,	{ 1052709, -24875, 370 } }, \
102 		{  408000000UL,	{ 1099069, -25895, 370 } }, \
103 		{  510000000UL,	{ 1146534, -26905, 370 } }, \
104 		{  612000000UL,	{ 1195102, -27915, 370 } }, \
105 		{  714000000UL,	{ 1244773, -28925, 370 } }, \
106 		{  816000000UL,	{ 1295549, -29935, 370 } }, \
107 		{  918000000UL,	{ 1347428, -30955, 370 } }, \
108 		{ 1020000000UL,	{ 1400411, -31965, 370 } }, \
109 		{ 1122000000UL,	{ 1454497, -32975, 370 } }, \
110 		{ 1224000000UL,	{ 1509687, -33985, 370 } }, \
111 		{ 1326000000UL,	{ 1565981, -35005, 370 } }, \
112 		{ 1428000000UL,	{ 1623379, -36015, 370 } }, \
113 		{ 1530000000UL,	{ 1681880, -37025, 370 } }, \
114 		{ 1632000000UL,	{ 1741485, -38035, 370 } }, \
115 		{ 1734000000UL,	{ 1802194, -39055, 370 } }, \
116 		{ 1836000000UL,	{ 1864006, -40065, 370 } }, \
117 		{ 1912500000UL,	{ 1910780, -40815, 370 } }, \
118 		{ 2014500000UL,	{ 1227000,      0,   0 } }, \
119 		{ 2218500000UL,	{ 1227000,      0,   0 } }, \
120 		{          0UL,	{       0,      0,   0 } }, \
121 	}
122 
123 #define CPU_CVB_TABLE_XA \
124 	.speedo_scale = 100,	\
125 	.voltage_scale = 1000,	\
126 	.entries = {		\
127 		{  204000000UL,	{ 1250024, -39785, 565 } }, \
128 		{  306000000UL,	{ 1297556, -41145, 565 } }, \
129 		{  408000000UL,	{ 1346718, -42505, 565 } }, \
130 		{  510000000UL,	{ 1397511, -43855, 565 } }, \
131 		{  612000000UL,	{ 1449933, -45215, 565 } }, \
132 		{  714000000UL,	{ 1503986, -46575, 565 } }, \
133 		{  816000000UL,	{ 1559669, -47935, 565 } }, \
134 		{  918000000UL,	{ 1616982, -49295, 565 } }, \
135 		{ 1020000000UL,	{ 1675926, -50645, 565 } }, \
136 		{ 1122000000UL,	{ 1736500, -52005, 565 } }, \
137 		{ 1224000000UL,	{ 1798704, -53365, 565 } }, \
138 		{ 1326000000UL,	{ 1862538, -54725, 565 } }, \
139 		{ 1428000000UL,	{ 1928003, -56085, 565 } }, \
140 		{ 1530000000UL,	{ 1995097, -57435, 565 } }, \
141 		{ 1606500000UL,	{ 2046149, -58445, 565 } }, \
142 		{ 1632000000UL,	{ 2063822, -58795, 565 } }, \
143 		{          0UL,	{       0,      0,   0 } }, \
144 	}
145 
146 #define CPU_CVB_TABLE_EUCM1 \
147 	.speedo_scale = 100,	\
148 	.voltage_scale = 1000,	\
149 	.entries = {		\
150 		{  204000000UL,	{  734429, 0, 0 } }, \
151 		{  306000000UL,	{  768191, 0, 0 } }, \
152 		{  408000000UL,	{  801953, 0, 0 } }, \
153 		{  510000000UL,	{  835715, 0, 0 } }, \
154 		{  612000000UL,	{  869477, 0, 0 } }, \
155 		{  714000000UL,	{  903239, 0, 0 } }, \
156 		{  816000000UL,	{  937001, 0, 0 } }, \
157 		{  918000000UL,	{  970763, 0, 0 } }, \
158 		{ 1020000000UL,	{ 1004525, 0, 0 } }, \
159 		{ 1122000000UL,	{ 1038287, 0, 0 } }, \
160 		{ 1224000000UL,	{ 1072049, 0, 0 } }, \
161 		{ 1326000000UL,	{ 1105811, 0, 0 } }, \
162 		{ 1428000000UL,	{ 1130000, 0, 0 } }, \
163 		{ 1555500000UL,	{ 1130000, 0, 0 } }, \
164 		{ 1632000000UL,	{ 1170000, 0, 0 } }, \
165 		{ 1734000000UL,	{ 1227500, 0, 0 } }, \
166 		{          0UL,	{       0, 0, 0 } }, \
167 	}
168 
169 #define CPU_CVB_TABLE_EUCM2 \
170 	.speedo_scale = 100,	\
171 	.voltage_scale = 1000,	\
172 	.entries = {		\
173 		{  204000000UL,	{  742283, 0, 0 } }, \
174 		{  306000000UL,	{  776249, 0, 0 } }, \
175 		{  408000000UL,	{  810215, 0, 0 } }, \
176 		{  510000000UL,	{  844181, 0, 0 } }, \
177 		{  612000000UL,	{  878147, 0, 0 } }, \
178 		{  714000000UL,	{  912113, 0, 0 } }, \
179 		{  816000000UL,	{  946079, 0, 0 } }, \
180 		{  918000000UL,	{  980045, 0, 0 } }, \
181 		{ 1020000000UL,	{ 1014011, 0, 0 } }, \
182 		{ 1122000000UL,	{ 1047977, 0, 0 } }, \
183 		{ 1224000000UL,	{ 1081943, 0, 0 } }, \
184 		{ 1326000000UL,	{ 1090000, 0, 0 } }, \
185 		{ 1479000000UL,	{ 1090000, 0, 0 } }, \
186 		{ 1555500000UL,	{ 1162000, 0, 0 } }, \
187 		{ 1683000000UL,	{ 1195000, 0, 0 } }, \
188 		{          0UL,	{       0, 0, 0 } }, \
189 	}
190 
191 #define CPU_CVB_TABLE_EUCM2_JOINT_RAIL \
192 	.speedo_scale = 100,	\
193 	.voltage_scale = 1000,	\
194 	.entries = {		\
195 		{  204000000UL,	{  742283, 0, 0 } }, \
196 		{  306000000UL,	{  776249, 0, 0 } }, \
197 		{  408000000UL,	{  810215, 0, 0 } }, \
198 		{  510000000UL,	{  844181, 0, 0 } }, \
199 		{  612000000UL,	{  878147, 0, 0 } }, \
200 		{  714000000UL,	{  912113, 0, 0 } }, \
201 		{  816000000UL,	{  946079, 0, 0 } }, \
202 		{  918000000UL,	{  980045, 0, 0 } }, \
203 		{ 1020000000UL,	{ 1014011, 0, 0 } }, \
204 		{ 1122000000UL,	{ 1047977, 0, 0 } }, \
205 		{ 1224000000UL,	{ 1081943, 0, 0 } }, \
206 		{ 1326000000UL,	{ 1090000, 0, 0 } }, \
207 		{ 1479000000UL,	{ 1090000, 0, 0 } }, \
208 		{ 1504500000UL,	{ 1120000, 0, 0 } }, \
209 		{          0UL,	{       0, 0, 0 } }, \
210 	}
211 
212 #define CPU_CVB_TABLE_ODN \
213 	.speedo_scale = 100,	\
214 	.voltage_scale = 1000,	\
215 	.entries = {		\
216 		{  204000000UL,	{  721094, 0, 0 } }, \
217 		{  306000000UL,	{  754040, 0, 0 } }, \
218 		{  408000000UL,	{  786986, 0, 0 } }, \
219 		{  510000000UL,	{  819932, 0, 0 } }, \
220 		{  612000000UL,	{  852878, 0, 0 } }, \
221 		{  714000000UL,	{  885824, 0, 0 } }, \
222 		{  816000000UL,	{  918770, 0, 0 } }, \
223 		{  918000000UL,	{  915716, 0, 0 } }, \
224 		{ 1020000000UL,	{  984662, 0, 0 } }, \
225 		{ 1122000000UL,	{ 1017608, 0, 0 } }, \
226 		{ 1224000000UL,	{ 1050554, 0, 0 } }, \
227 		{ 1326000000UL,	{ 1083500, 0, 0 } }, \
228 		{ 1428000000UL,	{ 1116446, 0, 0 } }, \
229 		{ 1581000000UL,	{ 1130000, 0, 0 } }, \
230 		{ 1683000000UL,	{ 1168000, 0, 0 } }, \
231 		{ 1785000000UL,	{ 1227500, 0, 0 } }, \
232 		{          0UL,	{       0, 0, 0 } }, \
233 	}
234 
235 static struct cvb_table tegra210_cpu_cvb_tables[] = {
236 	{
237 		.speedo_id = 10,
238 		.process_id = 0,
239 		.min_millivolts = 840,
240 		.max_millivolts = 1120,
241 		CPU_CVB_TABLE_EUCM2_JOINT_RAIL,
242 		.cpu_dfll_data = {
243 			.tune0_low = 0xffead0ff,
244 			.tune0_high = 0xffead0ff,
245 			.tune1 = 0x20091d9,
246 			.tune_high_min_millivolts = 864,
247 		}
248 	},
249 	{
250 		.speedo_id = 10,
251 		.process_id = 1,
252 		.min_millivolts = 840,
253 		.max_millivolts = 1120,
254 		CPU_CVB_TABLE_EUCM2_JOINT_RAIL,
255 		.cpu_dfll_data = {
256 			.tune0_low = 0xffead0ff,
257 			.tune0_high = 0xffead0ff,
258 			.tune1 = 0x20091d9,
259 			.tune_high_min_millivolts = 864,
260 		}
261 	},
262 	{
263 		.speedo_id = 9,
264 		.process_id = 0,
265 		.min_millivolts = 900,
266 		.max_millivolts = 1162,
267 		CPU_CVB_TABLE_EUCM2,
268 		.cpu_dfll_data = {
269 			.tune0_low = 0xffead0ff,
270 			.tune0_high = 0xffead0ff,
271 			.tune1 = 0x20091d9,
272 		}
273 	},
274 	{
275 		.speedo_id = 9,
276 		.process_id = 1,
277 		.min_millivolts = 900,
278 		.max_millivolts = 1162,
279 		CPU_CVB_TABLE_EUCM2,
280 		.cpu_dfll_data = {
281 			.tune0_low = 0xffead0ff,
282 			.tune0_high = 0xffead0ff,
283 			.tune1 = 0x20091d9,
284 		}
285 	},
286 	{
287 		.speedo_id = 8,
288 		.process_id = 0,
289 		.min_millivolts = 900,
290 		.max_millivolts = 1195,
291 		CPU_CVB_TABLE_EUCM2,
292 		.cpu_dfll_data = {
293 			.tune0_low = 0xffead0ff,
294 			.tune0_high = 0xffead0ff,
295 			.tune1 = 0x20091d9,
296 		}
297 	},
298 	{
299 		.speedo_id = 8,
300 		.process_id = 1,
301 		.min_millivolts = 900,
302 		.max_millivolts = 1195,
303 		CPU_CVB_TABLE_EUCM2,
304 		.cpu_dfll_data = {
305 			.tune0_low = 0xffead0ff,
306 			.tune0_high = 0xffead0ff,
307 			.tune1 = 0x20091d9,
308 		}
309 	},
310 	{
311 		.speedo_id = 7,
312 		.process_id = 0,
313 		.min_millivolts = 841,
314 		.max_millivolts = 1227,
315 		CPU_CVB_TABLE_EUCM1,
316 		.cpu_dfll_data = {
317 			.tune0_low = 0xffead0ff,
318 			.tune0_high = 0xffead0ff,
319 			.tune1 = 0x20091d9,
320 			.tune_high_min_millivolts = 864,
321 		}
322 	},
323 	{
324 		.speedo_id = 7,
325 		.process_id = 1,
326 		.min_millivolts = 841,
327 		.max_millivolts = 1227,
328 		CPU_CVB_TABLE_EUCM1,
329 		.cpu_dfll_data = {
330 			.tune0_low = 0xffead0ff,
331 			.tune0_high = 0xffead0ff,
332 			.tune1 = 0x20091d9,
333 			.tune_high_min_millivolts = 864,
334 		}
335 	},
336 	{
337 		.speedo_id = 6,
338 		.process_id = 0,
339 		.min_millivolts = 870,
340 		.max_millivolts = 1150,
341 		CPU_CVB_TABLE,
342 		.cpu_dfll_data = {
343 			.tune0_low = 0xffead0ff,
344 			.tune1 = 0x20091d9,
345 		}
346 	},
347 	{
348 		.speedo_id = 6,
349 		.process_id = 1,
350 		.min_millivolts = 870,
351 		.max_millivolts = 1150,
352 		CPU_CVB_TABLE,
353 		.cpu_dfll_data = {
354 			.tune0_low = 0xffead0ff,
355 			.tune1 = 0x25501d0,
356 		}
357 	},
358 	{
359 		.speedo_id = 5,
360 		.process_id = 0,
361 		.min_millivolts = 818,
362 		.max_millivolts = 1227,
363 		CPU_CVB_TABLE,
364 		.cpu_dfll_data = {
365 			.tune0_low = 0xffead0ff,
366 			.tune0_high = 0xffead0ff,
367 			.tune1 = 0x20091d9,
368 			.tune_high_min_millivolts = 864,
369 		}
370 	},
371 	{
372 		.speedo_id = 5,
373 		.process_id = 1,
374 		.min_millivolts = 818,
375 		.max_millivolts = 1227,
376 		CPU_CVB_TABLE,
377 		.cpu_dfll_data = {
378 			.tune0_low = 0xffead0ff,
379 			.tune0_high = 0xffead0ff,
380 			.tune1 = 0x25501d0,
381 			.tune_high_min_millivolts = 864,
382 		}
383 	},
384 	{
385 		.speedo_id = 4,
386 		.process_id = -1,
387 		.min_millivolts = 918,
388 		.max_millivolts = 1113,
389 		CPU_CVB_TABLE_XA,
390 		.cpu_dfll_data = {
391 			.tune0_low = 0xffead0ff,
392 			.tune1 = 0x17711BD,
393 		}
394 	},
395 	{
396 		.speedo_id = 3,
397 		.process_id = 0,
398 		.min_millivolts = 825,
399 		.max_millivolts = 1227,
400 		CPU_CVB_TABLE_ODN,
401 		.cpu_dfll_data = {
402 			.tune0_low = 0xffead0ff,
403 			.tune0_high = 0xffead0ff,
404 			.tune1 = 0x20091d9,
405 			.tune_high_min_millivolts = 864,
406 		}
407 	},
408 	{
409 		.speedo_id = 3,
410 		.process_id = 1,
411 		.min_millivolts = 825,
412 		.max_millivolts = 1227,
413 		CPU_CVB_TABLE_ODN,
414 		.cpu_dfll_data = {
415 			.tune0_low = 0xffead0ff,
416 			.tune0_high = 0xffead0ff,
417 			.tune1 = 0x25501d0,
418 			.tune_high_min_millivolts = 864,
419 		}
420 	},
421 	{
422 		.speedo_id = 2,
423 		.process_id = 0,
424 		.min_millivolts = 870,
425 		.max_millivolts = 1227,
426 		CPU_CVB_TABLE,
427 		.cpu_dfll_data = {
428 			.tune0_low = 0xffead0ff,
429 			.tune1 = 0x20091d9,
430 		}
431 	},
432 	{
433 		.speedo_id = 2,
434 		.process_id = 1,
435 		.min_millivolts = 870,
436 		.max_millivolts = 1227,
437 		CPU_CVB_TABLE,
438 		.cpu_dfll_data = {
439 			.tune0_low = 0xffead0ff,
440 			.tune1 = 0x25501d0,
441 		}
442 	},
443 	{
444 		.speedo_id = 1,
445 		.process_id = 0,
446 		.min_millivolts = 837,
447 		.max_millivolts = 1227,
448 		CPU_CVB_TABLE,
449 		.cpu_dfll_data = {
450 			.tune0_low = 0xffead0ff,
451 			.tune0_high = 0xffead0ff,
452 			.tune1 = 0x20091d9,
453 			.tune_high_min_millivolts = 864,
454 		}
455 	},
456 	{
457 		.speedo_id = 1,
458 		.process_id = 1,
459 		.min_millivolts = 837,
460 		.max_millivolts = 1227,
461 		CPU_CVB_TABLE,
462 		.cpu_dfll_data = {
463 			.tune0_low = 0xffead0ff,
464 			.tune0_high = 0xffead0ff,
465 			.tune1 = 0x25501d0,
466 			.tune_high_min_millivolts = 864,
467 		}
468 	},
469 	{
470 		.speedo_id = 0,
471 		.process_id = 0,
472 		.min_millivolts = 850,
473 		.max_millivolts = 1170,
474 		CPU_CVB_TABLE,
475 		.cpu_dfll_data = {
476 			.tune0_low = 0xffead0ff,
477 			.tune0_high = 0xffead0ff,
478 			.tune1 = 0x20091d9,
479 			.tune_high_min_millivolts = 864,
480 		}
481 	},
482 	{
483 		.speedo_id = 0,
484 		.process_id = 1,
485 		.min_millivolts = 850,
486 		.max_millivolts = 1170,
487 		CPU_CVB_TABLE,
488 		.cpu_dfll_data = {
489 			.tune0_low = 0xffead0ff,
490 			.tune0_high = 0xffead0ff,
491 			.tune1 = 0x25501d0,
492 			.tune_high_min_millivolts = 864,
493 		}
494 	},
495 };
496 
497 static const struct dfll_fcpu_data tegra124_dfll_fcpu_data = {
498 	.cpu_max_freq_table = tegra124_cpu_max_freq_table,
499 	.cpu_max_freq_table_size = ARRAY_SIZE(tegra124_cpu_max_freq_table),
500 	.cpu_cvb_tables = tegra124_cpu_cvb_tables,
501 	.cpu_cvb_tables_size = ARRAY_SIZE(tegra124_cpu_cvb_tables)
502 };
503 
504 static const struct dfll_fcpu_data tegra210_dfll_fcpu_data = {
505 	.cpu_max_freq_table = tegra210_cpu_max_freq_table,
506 	.cpu_max_freq_table_size = ARRAY_SIZE(tegra210_cpu_max_freq_table),
507 	.cpu_cvb_tables = tegra210_cpu_cvb_tables,
508 	.cpu_cvb_tables_size = ARRAY_SIZE(tegra210_cpu_cvb_tables),
509 };
510 
511 static const struct of_device_id tegra124_dfll_fcpu_of_match[] = {
512 	{
513 		.compatible = "nvidia,tegra124-dfll",
514 		.data = &tegra124_dfll_fcpu_data,
515 	},
516 	{
517 		.compatible = "nvidia,tegra210-dfll",
518 		.data = &tegra210_dfll_fcpu_data
519 	},
520 	{ },
521 };
522 
523 static void get_alignment_from_dt(struct device *dev,
524 				  struct rail_alignment *align)
525 {
526 	if (of_property_read_u32(dev->of_node,
527 				 "nvidia,pwm-voltage-step-microvolts",
528 				 &align->step_uv))
529 		align->step_uv = 0;
530 
531 	if (of_property_read_u32(dev->of_node,
532 				 "nvidia,pwm-min-microvolts",
533 				 &align->offset_uv))
534 		align->offset_uv = 0;
535 }
536 
537 static int get_alignment_from_regulator(struct device *dev,
538 					 struct rail_alignment *align)
539 {
540 	struct regulator *reg = regulator_get(dev, "vdd-cpu");
541 
542 	if (IS_ERR(reg))
543 		return PTR_ERR(reg);
544 
545 	align->offset_uv = regulator_list_voltage(reg, 0);
546 	align->step_uv = regulator_get_linear_step(reg);
547 
548 	regulator_put(reg);
549 
550 	return 0;
551 }
552 
553 static int tegra124_dfll_fcpu_probe(struct platform_device *pdev)
554 {
555 	int process_id, speedo_id, speedo_value, err;
556 	struct tegra_dfll_soc_data *soc;
557 	const struct dfll_fcpu_data *fcpu_data;
558 	struct rail_alignment align;
559 
560 	fcpu_data = of_device_get_match_data(&pdev->dev);
561 	if (!fcpu_data)
562 		return -ENODEV;
563 
564 	process_id = tegra_sku_info.cpu_process_id;
565 	speedo_id = tegra_sku_info.cpu_speedo_id;
566 	speedo_value = tegra_sku_info.cpu_speedo_value;
567 
568 	if (speedo_id >= fcpu_data->cpu_max_freq_table_size) {
569 		dev_err(&pdev->dev, "unknown max CPU freq for speedo_id=%d\n",
570 			speedo_id);
571 		return -ENODEV;
572 	}
573 
574 	soc = devm_kzalloc(&pdev->dev, sizeof(*soc), GFP_KERNEL);
575 	if (!soc)
576 		return -ENOMEM;
577 
578 	soc->dev = get_cpu_device(0);
579 	if (!soc->dev) {
580 		dev_err(&pdev->dev, "no CPU0 device\n");
581 		return -ENODEV;
582 	}
583 
584 	if (of_property_read_bool(pdev->dev.of_node, "nvidia,pwm-to-pmic")) {
585 		get_alignment_from_dt(&pdev->dev, &align);
586 	} else {
587 		err = get_alignment_from_regulator(&pdev->dev, &align);
588 		if (err)
589 			return err;
590 	}
591 
592 	soc->max_freq = fcpu_data->cpu_max_freq_table[speedo_id];
593 
594 	soc->cvb = tegra_cvb_add_opp_table(soc->dev, fcpu_data->cpu_cvb_tables,
595 					   fcpu_data->cpu_cvb_tables_size,
596 					   &align, process_id, speedo_id,
597 					   speedo_value, soc->max_freq);
598 	soc->alignment = align;
599 
600 	if (IS_ERR(soc->cvb)) {
601 		dev_err(&pdev->dev, "couldn't add OPP table: %ld\n",
602 			PTR_ERR(soc->cvb));
603 		return PTR_ERR(soc->cvb);
604 	}
605 
606 	err = tegra_dfll_register(pdev, soc);
607 	if (err < 0) {
608 		tegra_cvb_remove_opp_table(soc->dev, soc->cvb, soc->max_freq);
609 		return err;
610 	}
611 
612 	return 0;
613 }
614 
615 static void tegra124_dfll_fcpu_remove(struct platform_device *pdev)
616 {
617 	struct tegra_dfll_soc_data *soc;
618 
619 	/*
620 	 * Note that exiting early here is dangerous as after this function
621 	 * returns *soc is freed.
622 	 */
623 	soc = tegra_dfll_unregister(pdev);
624 	if (IS_ERR(soc))
625 		return;
626 
627 	tegra_cvb_remove_opp_table(soc->dev, soc->cvb, soc->max_freq);
628 }
629 
630 static const struct dev_pm_ops tegra124_dfll_pm_ops = {
631 	SET_RUNTIME_PM_OPS(tegra_dfll_runtime_suspend,
632 			   tegra_dfll_runtime_resume, NULL)
633 	SET_SYSTEM_SLEEP_PM_OPS(tegra_dfll_suspend, tegra_dfll_resume)
634 };
635 
636 static struct platform_driver tegra124_dfll_fcpu_driver = {
637 	.probe = tegra124_dfll_fcpu_probe,
638 	.remove_new = tegra124_dfll_fcpu_remove,
639 	.driver = {
640 		.name = "tegra124-dfll",
641 		.of_match_table = tegra124_dfll_fcpu_of_match,
642 		.pm = &tegra124_dfll_pm_ops,
643 	},
644 };
645 builtin_platform_driver(tegra124_dfll_fcpu_driver);
646