1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * TI CDCE706 programmable 3-PLL clock synthesizer driver 4 * 5 * Copyright (c) 2014 Cadence Design Systems Inc. 6 * 7 * Reference: https://www.ti.com/lit/ds/symlink/cdce706.pdf 8 */ 9 10 #include <linux/clk.h> 11 #include <linux/clk-provider.h> 12 #include <linux/delay.h> 13 #include <linux/i2c.h> 14 #include <linux/interrupt.h> 15 #include <linux/mod_devicetable.h> 16 #include <linux/module.h> 17 #include <linux/of.h> 18 #include <linux/rational.h> 19 #include <linux/regmap.h> 20 #include <linux/slab.h> 21 22 #define CDCE706_CLKIN_CLOCK 10 23 #define CDCE706_CLKIN_SOURCE 11 24 #define CDCE706_PLL_M_LOW(pll) (1 + 3 * (pll)) 25 #define CDCE706_PLL_N_LOW(pll) (2 + 3 * (pll)) 26 #define CDCE706_PLL_HI(pll) (3 + 3 * (pll)) 27 #define CDCE706_PLL_MUX 3 28 #define CDCE706_PLL_FVCO 6 29 #define CDCE706_DIVIDER(div) (13 + (div)) 30 #define CDCE706_CLKOUT(out) (19 + (out)) 31 32 #define CDCE706_CLKIN_CLOCK_MASK 0x10 33 #define CDCE706_CLKIN_SOURCE_SHIFT 6 34 #define CDCE706_CLKIN_SOURCE_MASK 0xc0 35 #define CDCE706_CLKIN_SOURCE_LVCMOS 0x40 36 37 #define CDCE706_PLL_MUX_MASK(pll) (0x80 >> (pll)) 38 #define CDCE706_PLL_LOW_M_MASK 0xff 39 #define CDCE706_PLL_LOW_N_MASK 0xff 40 #define CDCE706_PLL_HI_M_MASK 0x1 41 #define CDCE706_PLL_HI_N_MASK 0x1e 42 #define CDCE706_PLL_HI_N_SHIFT 1 43 #define CDCE706_PLL_M_MAX 0x1ff 44 #define CDCE706_PLL_N_MAX 0xfff 45 #define CDCE706_PLL_FVCO_MASK(pll) (0x80 >> (pll)) 46 #define CDCE706_PLL_FREQ_MIN 80000000 47 #define CDCE706_PLL_FREQ_MAX 300000000 48 #define CDCE706_PLL_FREQ_HI 180000000 49 50 #define CDCE706_DIVIDER_PLL(div) (9 + (div) - ((div) > 2) - ((div) > 4)) 51 #define CDCE706_DIVIDER_PLL_SHIFT(div) ((div) < 2 ? 5 : 3 * ((div) & 1)) 52 #define CDCE706_DIVIDER_PLL_MASK(div) (0x7 << CDCE706_DIVIDER_PLL_SHIFT(div)) 53 #define CDCE706_DIVIDER_DIVIDER_MASK 0x7f 54 #define CDCE706_DIVIDER_DIVIDER_MAX 0x7f 55 56 #define CDCE706_CLKOUT_DIVIDER_MASK 0x7 57 #define CDCE706_CLKOUT_ENABLE_MASK 0x8 58 59 static const struct regmap_config cdce706_regmap_config = { 60 .reg_bits = 8, 61 .val_bits = 8, 62 .val_format_endian = REGMAP_ENDIAN_NATIVE, 63 }; 64 65 #define to_hw_data(phw) (container_of((phw), struct cdce706_hw_data, hw)) 66 67 struct cdce706_hw_data { 68 struct cdce706_dev_data *dev_data; 69 unsigned idx; 70 unsigned parent; 71 struct clk_hw hw; 72 unsigned div; 73 unsigned mul; 74 unsigned mux; 75 }; 76 77 struct cdce706_dev_data { 78 struct i2c_client *client; 79 struct regmap *regmap; 80 struct clk *clkin_clk[2]; 81 const char *clkin_name[2]; 82 struct cdce706_hw_data clkin[1]; 83 struct cdce706_hw_data pll[3]; 84 struct cdce706_hw_data divider[6]; 85 struct cdce706_hw_data clkout[6]; 86 }; 87 88 static const char * const cdce706_source_name[] = { 89 "clk_in0", "clk_in1", 90 }; 91 92 static const char * const cdce706_clkin_name[] = { 93 "clk_in", 94 }; 95 96 static const char * const cdce706_pll_name[] = { 97 "pll1", "pll2", "pll3", 98 }; 99 100 static const char * const cdce706_divider_parent_name[] = { 101 "clk_in", "pll1", "pll2", "pll2", "pll3", 102 }; 103 104 static const char *cdce706_divider_name[] = { 105 "p0", "p1", "p2", "p3", "p4", "p5", 106 }; 107 108 static const char * const cdce706_clkout_name[] = { 109 "clk_out0", "clk_out1", "clk_out2", "clk_out3", "clk_out4", "clk_out5", 110 }; 111 112 static int cdce706_reg_read(struct cdce706_dev_data *dev_data, unsigned reg, 113 unsigned *val) 114 { 115 int rc = regmap_read(dev_data->regmap, reg | 0x80, val); 116 117 if (rc < 0) 118 dev_err(&dev_data->client->dev, "error reading reg %u", reg); 119 return rc; 120 } 121 122 static int cdce706_reg_write(struct cdce706_dev_data *dev_data, unsigned reg, 123 unsigned val) 124 { 125 int rc = regmap_write(dev_data->regmap, reg | 0x80, val); 126 127 if (rc < 0) 128 dev_err(&dev_data->client->dev, "error writing reg %u", reg); 129 return rc; 130 } 131 132 static int cdce706_reg_update(struct cdce706_dev_data *dev_data, unsigned reg, 133 unsigned mask, unsigned val) 134 { 135 int rc = regmap_update_bits(dev_data->regmap, reg | 0x80, mask, val); 136 137 if (rc < 0) 138 dev_err(&dev_data->client->dev, "error updating reg %u", reg); 139 return rc; 140 } 141 142 static int cdce706_clkin_set_parent(struct clk_hw *hw, u8 index) 143 { 144 struct cdce706_hw_data *hwd = to_hw_data(hw); 145 146 hwd->parent = index; 147 return 0; 148 } 149 150 static u8 cdce706_clkin_get_parent(struct clk_hw *hw) 151 { 152 struct cdce706_hw_data *hwd = to_hw_data(hw); 153 154 return hwd->parent; 155 } 156 157 static const struct clk_ops cdce706_clkin_ops = { 158 .set_parent = cdce706_clkin_set_parent, 159 .get_parent = cdce706_clkin_get_parent, 160 }; 161 162 static unsigned long cdce706_pll_recalc_rate(struct clk_hw *hw, 163 unsigned long parent_rate) 164 { 165 struct cdce706_hw_data *hwd = to_hw_data(hw); 166 167 dev_dbg(&hwd->dev_data->client->dev, 168 "%s, pll: %d, mux: %d, mul: %u, div: %u\n", 169 __func__, hwd->idx, hwd->mux, hwd->mul, hwd->div); 170 171 if (!hwd->mux) { 172 if (hwd->div && hwd->mul) { 173 u64 res = (u64)parent_rate * hwd->mul; 174 175 do_div(res, hwd->div); 176 return res; 177 } 178 } else { 179 if (hwd->div) 180 return parent_rate / hwd->div; 181 } 182 return 0; 183 } 184 185 static long cdce706_pll_round_rate(struct clk_hw *hw, unsigned long rate, 186 unsigned long *parent_rate) 187 { 188 struct cdce706_hw_data *hwd = to_hw_data(hw); 189 unsigned long mul, div; 190 u64 res; 191 192 dev_dbg(&hwd->dev_data->client->dev, 193 "%s, rate: %lu, parent_rate: %lu\n", 194 __func__, rate, *parent_rate); 195 196 rational_best_approximation(rate, *parent_rate, 197 CDCE706_PLL_N_MAX, CDCE706_PLL_M_MAX, 198 &mul, &div); 199 hwd->mul = mul; 200 hwd->div = div; 201 202 dev_dbg(&hwd->dev_data->client->dev, 203 "%s, pll: %d, mul: %lu, div: %lu\n", 204 __func__, hwd->idx, mul, div); 205 206 res = (u64)*parent_rate * hwd->mul; 207 do_div(res, hwd->div); 208 return res; 209 } 210 211 static int cdce706_pll_set_rate(struct clk_hw *hw, unsigned long rate, 212 unsigned long parent_rate) 213 { 214 struct cdce706_hw_data *hwd = to_hw_data(hw); 215 unsigned long mul = hwd->mul, div = hwd->div; 216 int err; 217 218 dev_dbg(&hwd->dev_data->client->dev, 219 "%s, pll: %d, mul: %lu, div: %lu\n", 220 __func__, hwd->idx, mul, div); 221 222 err = cdce706_reg_update(hwd->dev_data, 223 CDCE706_PLL_HI(hwd->idx), 224 CDCE706_PLL_HI_M_MASK | CDCE706_PLL_HI_N_MASK, 225 ((div >> 8) & CDCE706_PLL_HI_M_MASK) | 226 ((mul >> (8 - CDCE706_PLL_HI_N_SHIFT)) & 227 CDCE706_PLL_HI_N_MASK)); 228 if (err < 0) 229 return err; 230 231 err = cdce706_reg_write(hwd->dev_data, 232 CDCE706_PLL_M_LOW(hwd->idx), 233 div & CDCE706_PLL_LOW_M_MASK); 234 if (err < 0) 235 return err; 236 237 err = cdce706_reg_write(hwd->dev_data, 238 CDCE706_PLL_N_LOW(hwd->idx), 239 mul & CDCE706_PLL_LOW_N_MASK); 240 if (err < 0) 241 return err; 242 243 err = cdce706_reg_update(hwd->dev_data, 244 CDCE706_PLL_FVCO, 245 CDCE706_PLL_FVCO_MASK(hwd->idx), 246 rate > CDCE706_PLL_FREQ_HI ? 247 CDCE706_PLL_FVCO_MASK(hwd->idx) : 0); 248 return err; 249 } 250 251 static const struct clk_ops cdce706_pll_ops = { 252 .recalc_rate = cdce706_pll_recalc_rate, 253 .round_rate = cdce706_pll_round_rate, 254 .set_rate = cdce706_pll_set_rate, 255 }; 256 257 static int cdce706_divider_set_parent(struct clk_hw *hw, u8 index) 258 { 259 struct cdce706_hw_data *hwd = to_hw_data(hw); 260 261 if (hwd->parent == index) 262 return 0; 263 hwd->parent = index; 264 return cdce706_reg_update(hwd->dev_data, 265 CDCE706_DIVIDER_PLL(hwd->idx), 266 CDCE706_DIVIDER_PLL_MASK(hwd->idx), 267 index << CDCE706_DIVIDER_PLL_SHIFT(hwd->idx)); 268 } 269 270 static u8 cdce706_divider_get_parent(struct clk_hw *hw) 271 { 272 struct cdce706_hw_data *hwd = to_hw_data(hw); 273 274 return hwd->parent; 275 } 276 277 static unsigned long cdce706_divider_recalc_rate(struct clk_hw *hw, 278 unsigned long parent_rate) 279 { 280 struct cdce706_hw_data *hwd = to_hw_data(hw); 281 282 dev_dbg(&hwd->dev_data->client->dev, 283 "%s, divider: %d, div: %u\n", 284 __func__, hwd->idx, hwd->div); 285 if (hwd->div) 286 return parent_rate / hwd->div; 287 return 0; 288 } 289 290 static long cdce706_divider_round_rate(struct clk_hw *hw, unsigned long rate, 291 unsigned long *parent_rate) 292 { 293 struct cdce706_hw_data *hwd = to_hw_data(hw); 294 struct cdce706_dev_data *cdce = hwd->dev_data; 295 unsigned long mul, div; 296 297 dev_dbg(&hwd->dev_data->client->dev, 298 "%s, rate: %lu, parent_rate: %lu\n", 299 __func__, rate, *parent_rate); 300 301 rational_best_approximation(rate, *parent_rate, 302 1, CDCE706_DIVIDER_DIVIDER_MAX, 303 &mul, &div); 304 if (!mul) 305 div = CDCE706_DIVIDER_DIVIDER_MAX; 306 307 if (clk_hw_get_flags(hw) & CLK_SET_RATE_PARENT) { 308 unsigned long best_diff = rate; 309 unsigned long best_div = 0; 310 struct clk *gp_clk = cdce->clkin_clk[cdce->clkin[0].parent]; 311 unsigned long gp_rate = gp_clk ? clk_get_rate(gp_clk) : 0; 312 313 for (div = CDCE706_PLL_FREQ_MIN / rate; best_diff && 314 div <= CDCE706_PLL_FREQ_MAX / rate; ++div) { 315 unsigned long n, m; 316 unsigned long diff; 317 unsigned long div_rate; 318 u64 div_rate64; 319 320 if (rate * div < CDCE706_PLL_FREQ_MIN) 321 continue; 322 323 rational_best_approximation(rate * div, gp_rate, 324 CDCE706_PLL_N_MAX, 325 CDCE706_PLL_M_MAX, 326 &n, &m); 327 div_rate64 = (u64)gp_rate * n; 328 do_div(div_rate64, m); 329 do_div(div_rate64, div); 330 div_rate = div_rate64; 331 diff = max(div_rate, rate) - min(div_rate, rate); 332 333 if (diff < best_diff) { 334 best_diff = diff; 335 best_div = div; 336 dev_dbg(&hwd->dev_data->client->dev, 337 "%s, %lu * %lu / %lu / %lu = %lu\n", 338 __func__, gp_rate, n, m, div, div_rate); 339 } 340 } 341 342 div = best_div; 343 344 dev_dbg(&hwd->dev_data->client->dev, 345 "%s, altering parent rate: %lu -> %lu\n", 346 __func__, *parent_rate, rate * div); 347 *parent_rate = rate * div; 348 } 349 hwd->div = div; 350 351 dev_dbg(&hwd->dev_data->client->dev, 352 "%s, divider: %d, div: %lu\n", 353 __func__, hwd->idx, div); 354 355 return *parent_rate / div; 356 } 357 358 static int cdce706_divider_set_rate(struct clk_hw *hw, unsigned long rate, 359 unsigned long parent_rate) 360 { 361 struct cdce706_hw_data *hwd = to_hw_data(hw); 362 363 dev_dbg(&hwd->dev_data->client->dev, 364 "%s, divider: %d, div: %u\n", 365 __func__, hwd->idx, hwd->div); 366 367 return cdce706_reg_update(hwd->dev_data, 368 CDCE706_DIVIDER(hwd->idx), 369 CDCE706_DIVIDER_DIVIDER_MASK, 370 hwd->div); 371 } 372 373 static const struct clk_ops cdce706_divider_ops = { 374 .set_parent = cdce706_divider_set_parent, 375 .get_parent = cdce706_divider_get_parent, 376 .recalc_rate = cdce706_divider_recalc_rate, 377 .round_rate = cdce706_divider_round_rate, 378 .set_rate = cdce706_divider_set_rate, 379 }; 380 381 static int cdce706_clkout_prepare(struct clk_hw *hw) 382 { 383 struct cdce706_hw_data *hwd = to_hw_data(hw); 384 385 return cdce706_reg_update(hwd->dev_data, CDCE706_CLKOUT(hwd->idx), 386 CDCE706_CLKOUT_ENABLE_MASK, 387 CDCE706_CLKOUT_ENABLE_MASK); 388 } 389 390 static void cdce706_clkout_unprepare(struct clk_hw *hw) 391 { 392 struct cdce706_hw_data *hwd = to_hw_data(hw); 393 394 cdce706_reg_update(hwd->dev_data, CDCE706_CLKOUT(hwd->idx), 395 CDCE706_CLKOUT_ENABLE_MASK, 0); 396 } 397 398 static int cdce706_clkout_set_parent(struct clk_hw *hw, u8 index) 399 { 400 struct cdce706_hw_data *hwd = to_hw_data(hw); 401 402 if (hwd->parent == index) 403 return 0; 404 hwd->parent = index; 405 return cdce706_reg_update(hwd->dev_data, 406 CDCE706_CLKOUT(hwd->idx), 407 CDCE706_CLKOUT_ENABLE_MASK, index); 408 } 409 410 static u8 cdce706_clkout_get_parent(struct clk_hw *hw) 411 { 412 struct cdce706_hw_data *hwd = to_hw_data(hw); 413 414 return hwd->parent; 415 } 416 417 static unsigned long cdce706_clkout_recalc_rate(struct clk_hw *hw, 418 unsigned long parent_rate) 419 { 420 return parent_rate; 421 } 422 423 static long cdce706_clkout_round_rate(struct clk_hw *hw, unsigned long rate, 424 unsigned long *parent_rate) 425 { 426 *parent_rate = rate; 427 return rate; 428 } 429 430 static int cdce706_clkout_set_rate(struct clk_hw *hw, unsigned long rate, 431 unsigned long parent_rate) 432 { 433 return 0; 434 } 435 436 static const struct clk_ops cdce706_clkout_ops = { 437 .prepare = cdce706_clkout_prepare, 438 .unprepare = cdce706_clkout_unprepare, 439 .set_parent = cdce706_clkout_set_parent, 440 .get_parent = cdce706_clkout_get_parent, 441 .recalc_rate = cdce706_clkout_recalc_rate, 442 .round_rate = cdce706_clkout_round_rate, 443 .set_rate = cdce706_clkout_set_rate, 444 }; 445 446 static int cdce706_register_hw(struct cdce706_dev_data *cdce, 447 struct cdce706_hw_data *hw, unsigned num_hw, 448 const char * const *clk_names, 449 struct clk_init_data *init) 450 { 451 unsigned i; 452 int ret; 453 454 for (i = 0; i < num_hw; ++i, ++hw) { 455 init->name = clk_names[i]; 456 hw->dev_data = cdce; 457 hw->idx = i; 458 hw->hw.init = init; 459 ret = devm_clk_hw_register(&cdce->client->dev, 460 &hw->hw); 461 if (ret) { 462 dev_err(&cdce->client->dev, "Failed to register %s\n", 463 clk_names[i]); 464 return ret; 465 } 466 } 467 return 0; 468 } 469 470 static int cdce706_register_clkin(struct cdce706_dev_data *cdce) 471 { 472 struct clk_init_data init = { 473 .ops = &cdce706_clkin_ops, 474 .parent_names = cdce->clkin_name, 475 .num_parents = ARRAY_SIZE(cdce->clkin_name), 476 }; 477 unsigned i; 478 int ret; 479 unsigned clock, source; 480 481 for (i = 0; i < ARRAY_SIZE(cdce->clkin_name); ++i) { 482 struct clk *parent = devm_clk_get(&cdce->client->dev, 483 cdce706_source_name[i]); 484 485 if (IS_ERR(parent)) { 486 cdce->clkin_name[i] = cdce706_source_name[i]; 487 } else { 488 cdce->clkin_name[i] = __clk_get_name(parent); 489 cdce->clkin_clk[i] = parent; 490 } 491 } 492 493 ret = cdce706_reg_read(cdce, CDCE706_CLKIN_SOURCE, &source); 494 if (ret < 0) 495 return ret; 496 if ((source & CDCE706_CLKIN_SOURCE_MASK) == 497 CDCE706_CLKIN_SOURCE_LVCMOS) { 498 ret = cdce706_reg_read(cdce, CDCE706_CLKIN_CLOCK, &clock); 499 if (ret < 0) 500 return ret; 501 cdce->clkin[0].parent = !!(clock & CDCE706_CLKIN_CLOCK_MASK); 502 } 503 504 ret = cdce706_register_hw(cdce, cdce->clkin, 505 ARRAY_SIZE(cdce->clkin), 506 cdce706_clkin_name, &init); 507 return ret; 508 } 509 510 static int cdce706_register_plls(struct cdce706_dev_data *cdce) 511 { 512 struct clk_init_data init = { 513 .ops = &cdce706_pll_ops, 514 .parent_names = cdce706_clkin_name, 515 .num_parents = ARRAY_SIZE(cdce706_clkin_name), 516 }; 517 unsigned i; 518 int ret; 519 unsigned mux; 520 521 ret = cdce706_reg_read(cdce, CDCE706_PLL_MUX, &mux); 522 if (ret < 0) 523 return ret; 524 525 for (i = 0; i < ARRAY_SIZE(cdce->pll); ++i) { 526 unsigned m, n, v; 527 528 ret = cdce706_reg_read(cdce, CDCE706_PLL_M_LOW(i), &m); 529 if (ret < 0) 530 return ret; 531 ret = cdce706_reg_read(cdce, CDCE706_PLL_N_LOW(i), &n); 532 if (ret < 0) 533 return ret; 534 ret = cdce706_reg_read(cdce, CDCE706_PLL_HI(i), &v); 535 if (ret < 0) 536 return ret; 537 cdce->pll[i].div = m | ((v & CDCE706_PLL_HI_M_MASK) << 8); 538 cdce->pll[i].mul = n | ((v & CDCE706_PLL_HI_N_MASK) << 539 (8 - CDCE706_PLL_HI_N_SHIFT)); 540 cdce->pll[i].mux = mux & CDCE706_PLL_MUX_MASK(i); 541 dev_dbg(&cdce->client->dev, 542 "%s: i: %u, div: %u, mul: %u, mux: %d\n", __func__, i, 543 cdce->pll[i].div, cdce->pll[i].mul, cdce->pll[i].mux); 544 } 545 546 ret = cdce706_register_hw(cdce, cdce->pll, 547 ARRAY_SIZE(cdce->pll), 548 cdce706_pll_name, &init); 549 return ret; 550 } 551 552 static int cdce706_register_dividers(struct cdce706_dev_data *cdce) 553 { 554 struct clk_init_data init = { 555 .ops = &cdce706_divider_ops, 556 .parent_names = cdce706_divider_parent_name, 557 .num_parents = ARRAY_SIZE(cdce706_divider_parent_name), 558 .flags = CLK_SET_RATE_PARENT, 559 }; 560 unsigned i; 561 int ret; 562 563 for (i = 0; i < ARRAY_SIZE(cdce->divider); ++i) { 564 unsigned val; 565 566 ret = cdce706_reg_read(cdce, CDCE706_DIVIDER_PLL(i), &val); 567 if (ret < 0) 568 return ret; 569 cdce->divider[i].parent = 570 (val & CDCE706_DIVIDER_PLL_MASK(i)) >> 571 CDCE706_DIVIDER_PLL_SHIFT(i); 572 573 ret = cdce706_reg_read(cdce, CDCE706_DIVIDER(i), &val); 574 if (ret < 0) 575 return ret; 576 cdce->divider[i].div = val & CDCE706_DIVIDER_DIVIDER_MASK; 577 dev_dbg(&cdce->client->dev, 578 "%s: i: %u, parent: %u, div: %u\n", __func__, i, 579 cdce->divider[i].parent, cdce->divider[i].div); 580 } 581 582 ret = cdce706_register_hw(cdce, cdce->divider, 583 ARRAY_SIZE(cdce->divider), 584 cdce706_divider_name, &init); 585 return ret; 586 } 587 588 static int cdce706_register_clkouts(struct cdce706_dev_data *cdce) 589 { 590 struct clk_init_data init = { 591 .ops = &cdce706_clkout_ops, 592 .parent_names = cdce706_divider_name, 593 .num_parents = ARRAY_SIZE(cdce706_divider_name), 594 .flags = CLK_SET_RATE_PARENT, 595 }; 596 unsigned i; 597 int ret; 598 599 for (i = 0; i < ARRAY_SIZE(cdce->clkout); ++i) { 600 unsigned val; 601 602 ret = cdce706_reg_read(cdce, CDCE706_CLKOUT(i), &val); 603 if (ret < 0) 604 return ret; 605 cdce->clkout[i].parent = val & CDCE706_CLKOUT_DIVIDER_MASK; 606 dev_dbg(&cdce->client->dev, 607 "%s: i: %u, parent: %u\n", __func__, i, 608 cdce->clkout[i].parent); 609 } 610 611 return cdce706_register_hw(cdce, cdce->clkout, 612 ARRAY_SIZE(cdce->clkout), 613 cdce706_clkout_name, &init); 614 } 615 616 static struct clk_hw * 617 of_clk_cdce_get(struct of_phandle_args *clkspec, void *data) 618 { 619 struct cdce706_dev_data *cdce = data; 620 unsigned int idx = clkspec->args[0]; 621 622 if (idx >= ARRAY_SIZE(cdce->clkout)) { 623 pr_err("%s: invalid index %u\n", __func__, idx); 624 return ERR_PTR(-EINVAL); 625 } 626 627 return &cdce->clkout[idx].hw; 628 } 629 630 static int cdce706_probe(struct i2c_client *client, 631 const struct i2c_device_id *id) 632 { 633 struct i2c_adapter *adapter = client->adapter; 634 struct cdce706_dev_data *cdce; 635 int ret; 636 637 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 638 return -EIO; 639 640 cdce = devm_kzalloc(&client->dev, sizeof(*cdce), GFP_KERNEL); 641 if (!cdce) 642 return -ENOMEM; 643 644 cdce->client = client; 645 cdce->regmap = devm_regmap_init_i2c(client, &cdce706_regmap_config); 646 if (IS_ERR(cdce->regmap)) { 647 dev_err(&client->dev, "Failed to initialize regmap\n"); 648 return -EINVAL; 649 } 650 651 i2c_set_clientdata(client, cdce); 652 653 ret = cdce706_register_clkin(cdce); 654 if (ret < 0) 655 return ret; 656 ret = cdce706_register_plls(cdce); 657 if (ret < 0) 658 return ret; 659 ret = cdce706_register_dividers(cdce); 660 if (ret < 0) 661 return ret; 662 ret = cdce706_register_clkouts(cdce); 663 if (ret < 0) 664 return ret; 665 return of_clk_add_hw_provider(client->dev.of_node, of_clk_cdce_get, 666 cdce); 667 } 668 669 static int cdce706_remove(struct i2c_client *client) 670 { 671 of_clk_del_provider(client->dev.of_node); 672 return 0; 673 } 674 675 676 #ifdef CONFIG_OF 677 static const struct of_device_id cdce706_dt_match[] = { 678 { .compatible = "ti,cdce706" }, 679 { }, 680 }; 681 MODULE_DEVICE_TABLE(of, cdce706_dt_match); 682 #endif 683 684 static const struct i2c_device_id cdce706_id[] = { 685 { "cdce706", 0 }, 686 { } 687 }; 688 MODULE_DEVICE_TABLE(i2c, cdce706_id); 689 690 static struct i2c_driver cdce706_i2c_driver = { 691 .driver = { 692 .name = "cdce706", 693 .of_match_table = of_match_ptr(cdce706_dt_match), 694 }, 695 .probe = cdce706_probe, 696 .remove = cdce706_remove, 697 .id_table = cdce706_id, 698 }; 699 module_i2c_driver(cdce706_i2c_driver); 700 701 MODULE_AUTHOR("Max Filippov <jcmvbkbc@gmail.com>"); 702 MODULE_DESCRIPTION("TI CDCE 706 clock synthesizer driver"); 703 MODULE_LICENSE("GPL"); 704