1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Zynq UltraScale+ MPSoC clock controller 4 * 5 * Copyright (C) 2016-2019 Xilinx 6 * 7 * Based on drivers/clk/zynq/clkc.c 8 */ 9 10 #include <linux/bitfield.h> 11 #include <linux/clk.h> 12 #include <linux/clk-provider.h> 13 #include <linux/module.h> 14 #include <linux/of_platform.h> 15 #include <linux/slab.h> 16 #include <linux/string.h> 17 18 #include "clk-zynqmp.h" 19 20 #define MAX_PARENT 100 21 #define MAX_NODES 6 22 #define MAX_NAME_LEN 50 23 24 /* Flags for parents */ 25 #define PARENT_CLK_SELF 0 26 #define PARENT_CLK_NODE1 1 27 #define PARENT_CLK_NODE2 2 28 #define PARENT_CLK_NODE3 3 29 #define PARENT_CLK_NODE4 4 30 #define PARENT_CLK_EXTERNAL 5 31 32 #define END_OF_CLK_NAME "END_OF_CLK" 33 #define END_OF_TOPOLOGY_NODE 1 34 #define END_OF_PARENTS 1 35 #define RESERVED_CLK_NAME "" 36 37 #define CLK_GET_NAME_RESP_LEN 16 38 #define CLK_GET_TOPOLOGY_RESP_WORDS 3 39 #define CLK_GET_PARENTS_RESP_WORDS 3 40 #define CLK_GET_ATTR_RESP_WORDS 1 41 42 enum clk_type { 43 CLK_TYPE_OUTPUT, 44 CLK_TYPE_EXTERNAL, 45 }; 46 47 /** 48 * struct clock_parent - Clock parent 49 * @name: Parent name 50 * @id: Parent clock ID 51 * @flag: Parent flags 52 */ 53 struct clock_parent { 54 char name[MAX_NAME_LEN]; 55 int id; 56 u32 flag; 57 }; 58 59 /** 60 * struct zynqmp_clock - Clock 61 * @clk_name: Clock name 62 * @valid: Validity flag of clock 63 * @type: Clock type (Output/External) 64 * @node: Clock topology nodes 65 * @num_nodes: Number of nodes present in topology 66 * @parent: Parent of clock 67 * @num_parents: Number of parents of clock 68 * @clk_id: Clock id 69 */ 70 struct zynqmp_clock { 71 char clk_name[MAX_NAME_LEN]; 72 u32 valid; 73 enum clk_type type; 74 struct clock_topology node[MAX_NODES]; 75 u32 num_nodes; 76 struct clock_parent parent[MAX_PARENT]; 77 u32 num_parents; 78 u32 clk_id; 79 }; 80 81 struct name_resp { 82 char name[CLK_GET_NAME_RESP_LEN]; 83 }; 84 85 struct topology_resp { 86 #define CLK_TOPOLOGY_TYPE GENMASK(3, 0) 87 #define CLK_TOPOLOGY_FLAGS GENMASK(23, 8) 88 #define CLK_TOPOLOGY_TYPE_FLAGS GENMASK(31, 24) 89 u32 topology[CLK_GET_TOPOLOGY_RESP_WORDS]; 90 }; 91 92 struct parents_resp { 93 #define NA_PARENT 0xFFFFFFFF 94 #define DUMMY_PARENT 0xFFFFFFFE 95 #define CLK_PARENTS_ID GENMASK(15, 0) 96 #define CLK_PARENTS_FLAGS GENMASK(31, 16) 97 u32 parents[CLK_GET_PARENTS_RESP_WORDS]; 98 }; 99 100 struct attr_resp { 101 #define CLK_ATTR_VALID BIT(0) 102 #define CLK_ATTR_TYPE BIT(2) 103 #define CLK_ATTR_NODE_INDEX GENMASK(13, 0) 104 #define CLK_ATTR_NODE_TYPE GENMASK(19, 14) 105 #define CLK_ATTR_NODE_SUBCLASS GENMASK(25, 20) 106 #define CLK_ATTR_NODE_CLASS GENMASK(31, 26) 107 u32 attr[CLK_GET_ATTR_RESP_WORDS]; 108 }; 109 110 static const char clk_type_postfix[][10] = { 111 [TYPE_INVALID] = "", 112 [TYPE_MUX] = "_mux", 113 [TYPE_GATE] = "", 114 [TYPE_DIV1] = "_div1", 115 [TYPE_DIV2] = "_div2", 116 [TYPE_FIXEDFACTOR] = "_ff", 117 [TYPE_PLL] = "" 118 }; 119 120 static struct clk_hw *(* const clk_topology[]) (const char *name, u32 clk_id, 121 const char * const *parents, 122 u8 num_parents, 123 const struct clock_topology *nodes) 124 = { 125 [TYPE_INVALID] = NULL, 126 [TYPE_MUX] = zynqmp_clk_register_mux, 127 [TYPE_PLL] = zynqmp_clk_register_pll, 128 [TYPE_FIXEDFACTOR] = zynqmp_clk_register_fixed_factor, 129 [TYPE_DIV1] = zynqmp_clk_register_divider, 130 [TYPE_DIV2] = zynqmp_clk_register_divider, 131 [TYPE_GATE] = zynqmp_clk_register_gate 132 }; 133 134 static struct zynqmp_clock *clock; 135 static struct clk_hw_onecell_data *zynqmp_data; 136 static unsigned int clock_max_idx; 137 static const struct zynqmp_eemi_ops *eemi_ops; 138 139 /** 140 * zynqmp_is_valid_clock() - Check whether clock is valid or not 141 * @clk_id: Clock index 142 * 143 * Return: 1 if clock is valid, 0 if clock is invalid else error code 144 */ 145 static inline int zynqmp_is_valid_clock(u32 clk_id) 146 { 147 if (clk_id >= clock_max_idx) 148 return -ENODEV; 149 150 return clock[clk_id].valid; 151 } 152 153 /** 154 * zynqmp_get_clock_name() - Get name of clock from Clock index 155 * @clk_id: Clock index 156 * @clk_name: Name of clock 157 * 158 * Return: 0 on success else error code 159 */ 160 static int zynqmp_get_clock_name(u32 clk_id, char *clk_name) 161 { 162 int ret; 163 164 ret = zynqmp_is_valid_clock(clk_id); 165 if (ret == 1) { 166 strncpy(clk_name, clock[clk_id].clk_name, MAX_NAME_LEN); 167 return 0; 168 } 169 170 return ret == 0 ? -EINVAL : ret; 171 } 172 173 /** 174 * zynqmp_get_clock_type() - Get type of clock 175 * @clk_id: Clock index 176 * @type: Clock type: CLK_TYPE_OUTPUT or CLK_TYPE_EXTERNAL 177 * 178 * Return: 0 on success else error code 179 */ 180 static int zynqmp_get_clock_type(u32 clk_id, u32 *type) 181 { 182 int ret; 183 184 ret = zynqmp_is_valid_clock(clk_id); 185 if (ret == 1) { 186 *type = clock[clk_id].type; 187 return 0; 188 } 189 190 return ret == 0 ? -EINVAL : ret; 191 } 192 193 /** 194 * zynqmp_pm_clock_get_num_clocks() - Get number of clocks in system 195 * @nclocks: Number of clocks in system/board. 196 * 197 * Call firmware API to get number of clocks. 198 * 199 * Return: 0 on success else error code. 200 */ 201 static int zynqmp_pm_clock_get_num_clocks(u32 *nclocks) 202 { 203 struct zynqmp_pm_query_data qdata = {0}; 204 u32 ret_payload[PAYLOAD_ARG_CNT]; 205 int ret; 206 207 qdata.qid = PM_QID_CLOCK_GET_NUM_CLOCKS; 208 209 ret = eemi_ops->query_data(qdata, ret_payload); 210 *nclocks = ret_payload[1]; 211 212 return ret; 213 } 214 215 /** 216 * zynqmp_pm_clock_get_name() - Get the name of clock for given id 217 * @clock_id: ID of the clock to be queried 218 * @response: Name of the clock with the given id 219 * 220 * This function is used to get name of clock specified by given 221 * clock ID. 222 * 223 * Return: Returns 0 224 */ 225 static int zynqmp_pm_clock_get_name(u32 clock_id, 226 struct name_resp *response) 227 { 228 struct zynqmp_pm_query_data qdata = {0}; 229 u32 ret_payload[PAYLOAD_ARG_CNT]; 230 231 qdata.qid = PM_QID_CLOCK_GET_NAME; 232 qdata.arg1 = clock_id; 233 234 eemi_ops->query_data(qdata, ret_payload); 235 memcpy(response, ret_payload, sizeof(*response)); 236 237 return 0; 238 } 239 240 /** 241 * zynqmp_pm_clock_get_topology() - Get the topology of clock for given id 242 * @clock_id: ID of the clock to be queried 243 * @index: Node index of clock topology 244 * @response: Buffer used for the topology response 245 * 246 * This function is used to get topology information for the clock 247 * specified by given clock ID. 248 * 249 * This API will return 3 node of topology with a single response. To get 250 * other nodes, master should call same API in loop with new 251 * index till error is returned. E.g First call should have 252 * index 0 which will return nodes 0,1 and 2. Next call, index 253 * should be 3 which will return nodes 3,4 and 5 and so on. 254 * 255 * Return: 0 on success else error+reason 256 */ 257 static int zynqmp_pm_clock_get_topology(u32 clock_id, u32 index, 258 struct topology_resp *response) 259 { 260 struct zynqmp_pm_query_data qdata = {0}; 261 u32 ret_payload[PAYLOAD_ARG_CNT]; 262 int ret; 263 264 qdata.qid = PM_QID_CLOCK_GET_TOPOLOGY; 265 qdata.arg1 = clock_id; 266 qdata.arg2 = index; 267 268 ret = eemi_ops->query_data(qdata, ret_payload); 269 memcpy(response, &ret_payload[1], sizeof(*response)); 270 271 return ret; 272 } 273 274 /** 275 * zynqmp_clk_register_fixed_factor() - Register fixed factor with the 276 * clock framework 277 * @name: Name of this clock 278 * @clk_id: Clock ID 279 * @parents: Name of this clock's parents 280 * @num_parents: Number of parents 281 * @nodes: Clock topology node 282 * 283 * Return: clock hardware to the registered clock 284 */ 285 struct clk_hw *zynqmp_clk_register_fixed_factor(const char *name, u32 clk_id, 286 const char * const *parents, 287 u8 num_parents, 288 const struct clock_topology *nodes) 289 { 290 u32 mult, div; 291 struct clk_hw *hw; 292 struct zynqmp_pm_query_data qdata = {0}; 293 u32 ret_payload[PAYLOAD_ARG_CNT]; 294 int ret; 295 296 qdata.qid = PM_QID_CLOCK_GET_FIXEDFACTOR_PARAMS; 297 qdata.arg1 = clk_id; 298 299 ret = eemi_ops->query_data(qdata, ret_payload); 300 if (ret) 301 return ERR_PTR(ret); 302 303 mult = ret_payload[1]; 304 div = ret_payload[2]; 305 306 hw = clk_hw_register_fixed_factor(NULL, name, 307 parents[0], 308 nodes->flag, mult, 309 div); 310 311 return hw; 312 } 313 314 /** 315 * zynqmp_pm_clock_get_parents() - Get the first 3 parents of clock for given id 316 * @clock_id: Clock ID 317 * @index: Parent index 318 * @response: Parents of the given clock 319 * 320 * This function is used to get 3 parents for the clock specified by 321 * given clock ID. 322 * 323 * This API will return 3 parents with a single response. To get 324 * other parents, master should call same API in loop with new 325 * parent index till error is returned. E.g First call should have 326 * index 0 which will return parents 0,1 and 2. Next call, index 327 * should be 3 which will return parent 3,4 and 5 and so on. 328 * 329 * Return: 0 on success else error+reason 330 */ 331 static int zynqmp_pm_clock_get_parents(u32 clock_id, u32 index, 332 struct parents_resp *response) 333 { 334 struct zynqmp_pm_query_data qdata = {0}; 335 u32 ret_payload[PAYLOAD_ARG_CNT]; 336 int ret; 337 338 qdata.qid = PM_QID_CLOCK_GET_PARENTS; 339 qdata.arg1 = clock_id; 340 qdata.arg2 = index; 341 342 ret = eemi_ops->query_data(qdata, ret_payload); 343 memcpy(response, &ret_payload[1], sizeof(*response)); 344 345 return ret; 346 } 347 348 /** 349 * zynqmp_pm_clock_get_attributes() - Get the attributes of clock for given id 350 * @clock_id: Clock ID 351 * @response: Clock attributes response 352 * 353 * This function is used to get clock's attributes(e.g. valid, clock type, etc). 354 * 355 * Return: 0 on success else error+reason 356 */ 357 static int zynqmp_pm_clock_get_attributes(u32 clock_id, 358 struct attr_resp *response) 359 { 360 struct zynqmp_pm_query_data qdata = {0}; 361 u32 ret_payload[PAYLOAD_ARG_CNT]; 362 int ret; 363 364 qdata.qid = PM_QID_CLOCK_GET_ATTRIBUTES; 365 qdata.arg1 = clock_id; 366 367 ret = eemi_ops->query_data(qdata, ret_payload); 368 memcpy(response, &ret_payload[1], sizeof(*response)); 369 370 return ret; 371 } 372 373 /** 374 * __zynqmp_clock_get_topology() - Get topology data of clock from firmware 375 * response data 376 * @topology: Clock topology 377 * @response: Clock topology data received from firmware 378 * @nnodes: Number of nodes 379 * 380 * Return: 0 on success else error+reason 381 */ 382 static int __zynqmp_clock_get_topology(struct clock_topology *topology, 383 struct topology_resp *response, 384 u32 *nnodes) 385 { 386 int i; 387 u32 type; 388 389 for (i = 0; i < ARRAY_SIZE(response->topology); i++) { 390 type = FIELD_GET(CLK_TOPOLOGY_TYPE, response->topology[i]); 391 if (type == TYPE_INVALID) 392 return END_OF_TOPOLOGY_NODE; 393 topology[*nnodes].type = type; 394 topology[*nnodes].flag = FIELD_GET(CLK_TOPOLOGY_FLAGS, 395 response->topology[i]); 396 topology[*nnodes].type_flag = 397 FIELD_GET(CLK_TOPOLOGY_TYPE_FLAGS, 398 response->topology[i]); 399 (*nnodes)++; 400 } 401 402 return 0; 403 } 404 405 /** 406 * zynqmp_clock_get_topology() - Get topology of clock from firmware using 407 * PM_API 408 * @clk_id: Clock index 409 * @topology: Clock topology 410 * @num_nodes: Number of nodes 411 * 412 * Return: 0 on success else error+reason 413 */ 414 static int zynqmp_clock_get_topology(u32 clk_id, 415 struct clock_topology *topology, 416 u32 *num_nodes) 417 { 418 int j, ret; 419 struct topology_resp response = { }; 420 421 *num_nodes = 0; 422 for (j = 0; j <= MAX_NODES; j += ARRAY_SIZE(response.topology)) { 423 ret = zynqmp_pm_clock_get_topology(clock[clk_id].clk_id, j, 424 &response); 425 if (ret) 426 return ret; 427 ret = __zynqmp_clock_get_topology(topology, &response, 428 num_nodes); 429 if (ret == END_OF_TOPOLOGY_NODE) 430 return 0; 431 } 432 433 return 0; 434 } 435 436 /** 437 * __zynqmp_clock_get_parents() - Get parents info of clock from firmware 438 * response data 439 * @parents: Clock parents 440 * @response: Clock parents data received from firmware 441 * @nparent: Number of parent 442 * 443 * Return: 0 on success else error+reason 444 */ 445 static int __zynqmp_clock_get_parents(struct clock_parent *parents, 446 struct parents_resp *response, 447 u32 *nparent) 448 { 449 int i; 450 struct clock_parent *parent; 451 452 for (i = 0; i < ARRAY_SIZE(response->parents); i++) { 453 if (response->parents[i] == NA_PARENT) 454 return END_OF_PARENTS; 455 456 parent = &parents[i]; 457 parent->id = FIELD_GET(CLK_PARENTS_ID, response->parents[i]); 458 if (response->parents[i] == DUMMY_PARENT) { 459 strcpy(parent->name, "dummy_name"); 460 parent->flag = 0; 461 } else { 462 parent->flag = FIELD_GET(CLK_PARENTS_FLAGS, 463 response->parents[i]); 464 if (zynqmp_get_clock_name(parent->id, parent->name)) 465 continue; 466 } 467 *nparent += 1; 468 } 469 470 return 0; 471 } 472 473 /** 474 * zynqmp_clock_get_parents() - Get parents info from firmware using PM_API 475 * @clk_id: Clock index 476 * @parents: Clock parents 477 * @num_parents: Total number of parents 478 * 479 * Return: 0 on success else error+reason 480 */ 481 static int zynqmp_clock_get_parents(u32 clk_id, struct clock_parent *parents, 482 u32 *num_parents) 483 { 484 int j = 0, ret; 485 struct parents_resp response = { }; 486 487 *num_parents = 0; 488 do { 489 /* Get parents from firmware */ 490 ret = zynqmp_pm_clock_get_parents(clock[clk_id].clk_id, j, 491 &response); 492 if (ret) 493 return ret; 494 495 ret = __zynqmp_clock_get_parents(&parents[j], &response, 496 num_parents); 497 if (ret == END_OF_PARENTS) 498 return 0; 499 j += ARRAY_SIZE(response.parents); 500 } while (*num_parents <= MAX_PARENT); 501 502 return 0; 503 } 504 505 /** 506 * zynqmp_get_parent_list() - Create list of parents name 507 * @np: Device node 508 * @clk_id: Clock index 509 * @parent_list: List of parent's name 510 * @num_parents: Total number of parents 511 * 512 * Return: 0 on success else error+reason 513 */ 514 static int zynqmp_get_parent_list(struct device_node *np, u32 clk_id, 515 const char **parent_list, u32 *num_parents) 516 { 517 int i = 0, ret; 518 u32 total_parents = clock[clk_id].num_parents; 519 struct clock_topology *clk_nodes; 520 struct clock_parent *parents; 521 522 clk_nodes = clock[clk_id].node; 523 parents = clock[clk_id].parent; 524 525 for (i = 0; i < total_parents; i++) { 526 if (!parents[i].flag) { 527 parent_list[i] = parents[i].name; 528 } else if (parents[i].flag == PARENT_CLK_EXTERNAL) { 529 ret = of_property_match_string(np, "clock-names", 530 parents[i].name); 531 if (ret < 0) 532 strcpy(parents[i].name, "dummy_name"); 533 parent_list[i] = parents[i].name; 534 } else { 535 strcat(parents[i].name, 536 clk_type_postfix[clk_nodes[parents[i].flag - 1]. 537 type]); 538 parent_list[i] = parents[i].name; 539 } 540 } 541 542 *num_parents = total_parents; 543 return 0; 544 } 545 546 /** 547 * zynqmp_register_clk_topology() - Register clock topology 548 * @clk_id: Clock index 549 * @clk_name: Clock Name 550 * @num_parents: Total number of parents 551 * @parent_names: List of parents name 552 * 553 * Return: Returns either clock hardware or error+reason 554 */ 555 static struct clk_hw *zynqmp_register_clk_topology(int clk_id, char *clk_name, 556 int num_parents, 557 const char **parent_names) 558 { 559 int j; 560 u32 num_nodes, clk_dev_id; 561 char *clk_out[MAX_NODES]; 562 struct clock_topology *nodes; 563 struct clk_hw *hw = NULL; 564 565 nodes = clock[clk_id].node; 566 num_nodes = clock[clk_id].num_nodes; 567 clk_dev_id = clock[clk_id].clk_id; 568 569 for (j = 0; j < num_nodes; j++) { 570 /* 571 * Clock name received from firmware is output clock name. 572 * Intermediate clock names are postfixed with type of clock. 573 */ 574 if (j != (num_nodes - 1)) { 575 clk_out[j] = kasprintf(GFP_KERNEL, "%s%s", clk_name, 576 clk_type_postfix[nodes[j].type]); 577 } else { 578 clk_out[j] = kasprintf(GFP_KERNEL, "%s", clk_name); 579 } 580 581 if (!clk_topology[nodes[j].type]) 582 continue; 583 584 hw = (*clk_topology[nodes[j].type])(clk_out[j], clk_dev_id, 585 parent_names, 586 num_parents, 587 &nodes[j]); 588 if (IS_ERR(hw)) 589 pr_warn_once("%s() 0x%x: %s register fail with %ld\n", 590 __func__, clk_dev_id, clk_name, 591 PTR_ERR(hw)); 592 593 parent_names[0] = clk_out[j]; 594 } 595 596 for (j = 0; j < num_nodes; j++) 597 kfree(clk_out[j]); 598 599 return hw; 600 } 601 602 /** 603 * zynqmp_register_clocks() - Register clocks 604 * @np: Device node 605 * 606 * Return: 0 on success else error code 607 */ 608 static int zynqmp_register_clocks(struct device_node *np) 609 { 610 int ret; 611 u32 i, total_parents = 0, type = 0; 612 const char *parent_names[MAX_PARENT]; 613 614 for (i = 0; i < clock_max_idx; i++) { 615 char clk_name[MAX_NAME_LEN]; 616 617 /* get clock name, continue to next clock if name not found */ 618 if (zynqmp_get_clock_name(i, clk_name)) 619 continue; 620 621 /* Check if clock is valid and output clock. 622 * Do not register invalid or external clock. 623 */ 624 ret = zynqmp_get_clock_type(i, &type); 625 if (ret || type != CLK_TYPE_OUTPUT) 626 continue; 627 628 /* Get parents of clock*/ 629 if (zynqmp_get_parent_list(np, i, parent_names, 630 &total_parents)) { 631 WARN_ONCE(1, "No parents found for %s\n", 632 clock[i].clk_name); 633 continue; 634 } 635 636 zynqmp_data->hws[i] = 637 zynqmp_register_clk_topology(i, clk_name, 638 total_parents, 639 parent_names); 640 } 641 642 for (i = 0; i < clock_max_idx; i++) { 643 if (IS_ERR(zynqmp_data->hws[i])) { 644 pr_err("Zynq Ultrascale+ MPSoC clk %s: register failed with %ld\n", 645 clock[i].clk_name, PTR_ERR(zynqmp_data->hws[i])); 646 WARN_ON(1); 647 } 648 } 649 return 0; 650 } 651 652 /** 653 * zynqmp_get_clock_info() - Get clock information from firmware using PM_API 654 */ 655 static void zynqmp_get_clock_info(void) 656 { 657 int i, ret; 658 u32 type = 0; 659 u32 nodetype, subclass, class; 660 struct attr_resp attr; 661 struct name_resp name; 662 663 for (i = 0; i < clock_max_idx; i++) { 664 ret = zynqmp_pm_clock_get_attributes(i, &attr); 665 if (ret) 666 continue; 667 668 clock[i].valid = FIELD_GET(CLK_ATTR_VALID, attr.attr[0]); 669 /* skip query for Invalid clock */ 670 ret = zynqmp_is_valid_clock(i); 671 if (ret != CLK_ATTR_VALID) 672 continue; 673 674 clock[i].type = FIELD_GET(CLK_ATTR_TYPE, attr.attr[0]) ? 675 CLK_TYPE_EXTERNAL : CLK_TYPE_OUTPUT; 676 677 nodetype = FIELD_GET(CLK_ATTR_NODE_TYPE, attr.attr[0]); 678 subclass = FIELD_GET(CLK_ATTR_NODE_SUBCLASS, attr.attr[0]); 679 class = FIELD_GET(CLK_ATTR_NODE_CLASS, attr.attr[0]); 680 681 clock[i].clk_id = FIELD_PREP(CLK_ATTR_NODE_CLASS, class) | 682 FIELD_PREP(CLK_ATTR_NODE_SUBCLASS, subclass) | 683 FIELD_PREP(CLK_ATTR_NODE_TYPE, nodetype) | 684 FIELD_PREP(CLK_ATTR_NODE_INDEX, i); 685 686 zynqmp_pm_clock_get_name(clock[i].clk_id, &name); 687 if (!strcmp(name.name, RESERVED_CLK_NAME)) 688 continue; 689 strncpy(clock[i].clk_name, name.name, MAX_NAME_LEN); 690 } 691 692 /* Get topology of all clock */ 693 for (i = 0; i < clock_max_idx; i++) { 694 ret = zynqmp_get_clock_type(i, &type); 695 if (ret || type != CLK_TYPE_OUTPUT) 696 continue; 697 698 ret = zynqmp_clock_get_topology(i, clock[i].node, 699 &clock[i].num_nodes); 700 if (ret) 701 continue; 702 703 ret = zynqmp_clock_get_parents(i, clock[i].parent, 704 &clock[i].num_parents); 705 if (ret) 706 continue; 707 } 708 } 709 710 /** 711 * zynqmp_clk_setup() - Setup the clock framework and register clocks 712 * @np: Device node 713 * 714 * Return: 0 on success else error code 715 */ 716 static int zynqmp_clk_setup(struct device_node *np) 717 { 718 int ret; 719 720 ret = zynqmp_pm_clock_get_num_clocks(&clock_max_idx); 721 if (ret) 722 return ret; 723 724 zynqmp_data = kzalloc(struct_size(zynqmp_data, hws, clock_max_idx), 725 GFP_KERNEL); 726 if (!zynqmp_data) 727 return -ENOMEM; 728 729 clock = kcalloc(clock_max_idx, sizeof(*clock), GFP_KERNEL); 730 if (!clock) { 731 kfree(zynqmp_data); 732 return -ENOMEM; 733 } 734 735 zynqmp_get_clock_info(); 736 zynqmp_register_clocks(np); 737 738 zynqmp_data->num = clock_max_idx; 739 of_clk_add_hw_provider(np, of_clk_hw_onecell_get, zynqmp_data); 740 741 return 0; 742 } 743 744 static int zynqmp_clock_probe(struct platform_device *pdev) 745 { 746 int ret; 747 struct device *dev = &pdev->dev; 748 749 eemi_ops = zynqmp_pm_get_eemi_ops(); 750 if (IS_ERR(eemi_ops)) 751 return PTR_ERR(eemi_ops); 752 753 ret = zynqmp_clk_setup(dev->of_node); 754 755 return ret; 756 } 757 758 static const struct of_device_id zynqmp_clock_of_match[] = { 759 {.compatible = "xlnx,zynqmp-clk"}, 760 {.compatible = "xlnx,versal-clk"}, 761 {}, 762 }; 763 MODULE_DEVICE_TABLE(of, zynqmp_clock_of_match); 764 765 static struct platform_driver zynqmp_clock_driver = { 766 .driver = { 767 .name = "zynqmp_clock", 768 .of_match_table = zynqmp_clock_of_match, 769 }, 770 .probe = zynqmp_clock_probe, 771 }; 772 module_platform_driver(zynqmp_clock_driver); 773