1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * clk-xgene.c - AppliedMicro X-Gene Clock Interface 4 * 5 * Copyright (c) 2013, Applied Micro Circuits Corporation 6 * Author: Loc Ho <lho@apm.com> 7 */ 8 #include <linux/module.h> 9 #include <linux/spinlock.h> 10 #include <linux/io.h> 11 #include <linux/of.h> 12 #include <linux/clkdev.h> 13 #include <linux/clk-provider.h> 14 #include <linux/of_address.h> 15 16 /* Register SCU_PCPPLL bit fields */ 17 #define N_DIV_RD(src) ((src) & 0x000001ff) 18 #define SC_N_DIV_RD(src) ((src) & 0x0000007f) 19 #define SC_OUTDIV2(src) (((src) & 0x00000100) >> 8) 20 21 /* Register SCU_SOCPLL bit fields */ 22 #define CLKR_RD(src) (((src) & 0x07000000)>>24) 23 #define CLKOD_RD(src) (((src) & 0x00300000)>>20) 24 #define REGSPEC_RESET_F1_MASK 0x00010000 25 #define CLKF_RD(src) (((src) & 0x000001ff)) 26 27 #define XGENE_CLK_DRIVER_VER "0.1" 28 29 static DEFINE_SPINLOCK(clk_lock); 30 31 static inline u32 xgene_clk_read(void __iomem *csr) 32 { 33 return readl_relaxed(csr); 34 } 35 36 static inline void xgene_clk_write(u32 data, void __iomem *csr) 37 { 38 writel_relaxed(data, csr); 39 } 40 41 /* PLL Clock */ 42 enum xgene_pll_type { 43 PLL_TYPE_PCP = 0, 44 PLL_TYPE_SOC = 1, 45 }; 46 47 struct xgene_clk_pll { 48 struct clk_hw hw; 49 void __iomem *reg; 50 spinlock_t *lock; 51 u32 pll_offset; 52 enum xgene_pll_type type; 53 int version; 54 }; 55 56 #define to_xgene_clk_pll(_hw) container_of(_hw, struct xgene_clk_pll, hw) 57 58 static int xgene_clk_pll_is_enabled(struct clk_hw *hw) 59 { 60 struct xgene_clk_pll *pllclk = to_xgene_clk_pll(hw); 61 u32 data; 62 63 data = xgene_clk_read(pllclk->reg + pllclk->pll_offset); 64 pr_debug("%s pll %s\n", clk_hw_get_name(hw), 65 data & REGSPEC_RESET_F1_MASK ? "disabled" : "enabled"); 66 67 return data & REGSPEC_RESET_F1_MASK ? 0 : 1; 68 } 69 70 static unsigned long xgene_clk_pll_recalc_rate(struct clk_hw *hw, 71 unsigned long parent_rate) 72 { 73 struct xgene_clk_pll *pllclk = to_xgene_clk_pll(hw); 74 unsigned long fref; 75 unsigned long fvco; 76 u32 pll; 77 u32 nref; 78 u32 nout; 79 u32 nfb; 80 81 pll = xgene_clk_read(pllclk->reg + pllclk->pll_offset); 82 83 if (pllclk->version <= 1) { 84 if (pllclk->type == PLL_TYPE_PCP) { 85 /* 86 * PLL VCO = Reference clock * NF 87 * PCP PLL = PLL_VCO / 2 88 */ 89 nout = 2; 90 fvco = parent_rate * (N_DIV_RD(pll) + 4); 91 } else { 92 /* 93 * Fref = Reference Clock / NREF; 94 * Fvco = Fref * NFB; 95 * Fout = Fvco / NOUT; 96 */ 97 nref = CLKR_RD(pll) + 1; 98 nout = CLKOD_RD(pll) + 1; 99 nfb = CLKF_RD(pll); 100 fref = parent_rate / nref; 101 fvco = fref * nfb; 102 } 103 } else { 104 /* 105 * fvco = Reference clock * FBDIVC 106 * PLL freq = fvco / NOUT 107 */ 108 nout = SC_OUTDIV2(pll) ? 2 : 3; 109 fvco = parent_rate * SC_N_DIV_RD(pll); 110 } 111 pr_debug("%s pll recalc rate %ld parent %ld version %d\n", 112 clk_hw_get_name(hw), fvco / nout, parent_rate, 113 pllclk->version); 114 115 return fvco / nout; 116 } 117 118 static const struct clk_ops xgene_clk_pll_ops = { 119 .is_enabled = xgene_clk_pll_is_enabled, 120 .recalc_rate = xgene_clk_pll_recalc_rate, 121 }; 122 123 static struct clk *xgene_register_clk_pll(struct device *dev, 124 const char *name, const char *parent_name, 125 unsigned long flags, void __iomem *reg, u32 pll_offset, 126 u32 type, spinlock_t *lock, int version) 127 { 128 struct xgene_clk_pll *apmclk; 129 struct clk *clk; 130 struct clk_init_data init; 131 132 /* allocate the APM clock structure */ 133 apmclk = kzalloc(sizeof(*apmclk), GFP_KERNEL); 134 if (!apmclk) 135 return ERR_PTR(-ENOMEM); 136 137 init.name = name; 138 init.ops = &xgene_clk_pll_ops; 139 init.flags = flags; 140 init.parent_names = parent_name ? &parent_name : NULL; 141 init.num_parents = parent_name ? 1 : 0; 142 143 apmclk->version = version; 144 apmclk->reg = reg; 145 apmclk->lock = lock; 146 apmclk->pll_offset = pll_offset; 147 apmclk->type = type; 148 apmclk->hw.init = &init; 149 150 /* Register the clock */ 151 clk = clk_register(dev, &apmclk->hw); 152 if (IS_ERR(clk)) { 153 pr_err("%s: could not register clk %s\n", __func__, name); 154 kfree(apmclk); 155 return NULL; 156 } 157 return clk; 158 } 159 160 static int xgene_pllclk_version(struct device_node *np) 161 { 162 if (of_device_is_compatible(np, "apm,xgene-socpll-clock")) 163 return 1; 164 if (of_device_is_compatible(np, "apm,xgene-pcppll-clock")) 165 return 1; 166 return 2; 167 } 168 169 static void xgene_pllclk_init(struct device_node *np, enum xgene_pll_type pll_type) 170 { 171 const char *clk_name = np->full_name; 172 struct clk *clk; 173 void __iomem *reg; 174 int version = xgene_pllclk_version(np); 175 176 reg = of_iomap(np, 0); 177 if (!reg) { 178 pr_err("Unable to map CSR register for %pOF\n", np); 179 return; 180 } 181 of_property_read_string(np, "clock-output-names", &clk_name); 182 clk = xgene_register_clk_pll(NULL, 183 clk_name, of_clk_get_parent_name(np, 0), 184 0, reg, 0, pll_type, &clk_lock, 185 version); 186 if (!IS_ERR(clk)) { 187 of_clk_add_provider(np, of_clk_src_simple_get, clk); 188 clk_register_clkdev(clk, clk_name, NULL); 189 pr_debug("Add %s clock PLL\n", clk_name); 190 } 191 } 192 193 static void xgene_socpllclk_init(struct device_node *np) 194 { 195 xgene_pllclk_init(np, PLL_TYPE_SOC); 196 } 197 198 static void xgene_pcppllclk_init(struct device_node *np) 199 { 200 xgene_pllclk_init(np, PLL_TYPE_PCP); 201 } 202 203 /** 204 * struct xgene_clk_pmd - PMD clock 205 * 206 * @hw: handle between common and hardware-specific interfaces 207 * @reg: register containing the fractional scale multiplier (scaler) 208 * @shift: shift to the unit bit field 209 * @denom: 1/denominator unit 210 * @lock: register lock 211 * Flags: 212 * XGENE_CLK_PMD_SCALE_INVERTED - By default the scaler is the value read 213 * from the register plus one. For example, 214 * 0 for (0 + 1) / denom, 215 * 1 for (1 + 1) / denom and etc. 216 * If this flag is set, it is 217 * 0 for (denom - 0) / denom, 218 * 1 for (denom - 1) / denom and etc. 219 * 220 */ 221 struct xgene_clk_pmd { 222 struct clk_hw hw; 223 void __iomem *reg; 224 u8 shift; 225 u32 mask; 226 u64 denom; 227 u32 flags; 228 spinlock_t *lock; 229 }; 230 231 #define to_xgene_clk_pmd(_hw) container_of(_hw, struct xgene_clk_pmd, hw) 232 233 #define XGENE_CLK_PMD_SCALE_INVERTED BIT(0) 234 #define XGENE_CLK_PMD_SHIFT 8 235 #define XGENE_CLK_PMD_WIDTH 3 236 237 static unsigned long xgene_clk_pmd_recalc_rate(struct clk_hw *hw, 238 unsigned long parent_rate) 239 { 240 struct xgene_clk_pmd *fd = to_xgene_clk_pmd(hw); 241 unsigned long flags = 0; 242 u64 ret, scale; 243 u32 val; 244 245 if (fd->lock) 246 spin_lock_irqsave(fd->lock, flags); 247 else 248 __acquire(fd->lock); 249 250 val = readl(fd->reg); 251 252 if (fd->lock) 253 spin_unlock_irqrestore(fd->lock, flags); 254 else 255 __release(fd->lock); 256 257 ret = (u64)parent_rate; 258 259 scale = (val & fd->mask) >> fd->shift; 260 if (fd->flags & XGENE_CLK_PMD_SCALE_INVERTED) 261 scale = fd->denom - scale; 262 else 263 scale++; 264 265 /* freq = parent_rate * scaler / denom */ 266 do_div(ret, fd->denom); 267 ret *= scale; 268 if (ret == 0) 269 ret = (u64)parent_rate; 270 271 return ret; 272 } 273 274 static long xgene_clk_pmd_round_rate(struct clk_hw *hw, unsigned long rate, 275 unsigned long *parent_rate) 276 { 277 struct xgene_clk_pmd *fd = to_xgene_clk_pmd(hw); 278 u64 ret, scale; 279 280 if (!rate || rate >= *parent_rate) 281 return *parent_rate; 282 283 /* freq = parent_rate * scaler / denom */ 284 ret = rate * fd->denom; 285 scale = DIV_ROUND_UP_ULL(ret, *parent_rate); 286 287 ret = (u64)*parent_rate * scale; 288 do_div(ret, fd->denom); 289 290 return ret; 291 } 292 293 static int xgene_clk_pmd_set_rate(struct clk_hw *hw, unsigned long rate, 294 unsigned long parent_rate) 295 { 296 struct xgene_clk_pmd *fd = to_xgene_clk_pmd(hw); 297 unsigned long flags = 0; 298 u64 scale, ret; 299 u32 val; 300 301 /* 302 * Compute the scaler: 303 * 304 * freq = parent_rate * scaler / denom, or 305 * scaler = freq * denom / parent_rate 306 */ 307 ret = rate * fd->denom; 308 scale = DIV_ROUND_UP_ULL(ret, (u64)parent_rate); 309 310 /* Check if inverted */ 311 if (fd->flags & XGENE_CLK_PMD_SCALE_INVERTED) 312 scale = fd->denom - scale; 313 else 314 scale--; 315 316 if (fd->lock) 317 spin_lock_irqsave(fd->lock, flags); 318 else 319 __acquire(fd->lock); 320 321 val = readl(fd->reg); 322 val &= ~fd->mask; 323 val |= (scale << fd->shift); 324 writel(val, fd->reg); 325 326 if (fd->lock) 327 spin_unlock_irqrestore(fd->lock, flags); 328 else 329 __release(fd->lock); 330 331 return 0; 332 } 333 334 static const struct clk_ops xgene_clk_pmd_ops = { 335 .recalc_rate = xgene_clk_pmd_recalc_rate, 336 .round_rate = xgene_clk_pmd_round_rate, 337 .set_rate = xgene_clk_pmd_set_rate, 338 }; 339 340 static struct clk * 341 xgene_register_clk_pmd(struct device *dev, 342 const char *name, const char *parent_name, 343 unsigned long flags, void __iomem *reg, u8 shift, 344 u8 width, u64 denom, u32 clk_flags, spinlock_t *lock) 345 { 346 struct xgene_clk_pmd *fd; 347 struct clk_init_data init; 348 struct clk *clk; 349 350 fd = kzalloc(sizeof(*fd), GFP_KERNEL); 351 if (!fd) 352 return ERR_PTR(-ENOMEM); 353 354 init.name = name; 355 init.ops = &xgene_clk_pmd_ops; 356 init.flags = flags; 357 init.parent_names = parent_name ? &parent_name : NULL; 358 init.num_parents = parent_name ? 1 : 0; 359 360 fd->reg = reg; 361 fd->shift = shift; 362 fd->mask = (BIT(width) - 1) << shift; 363 fd->denom = denom; 364 fd->flags = clk_flags; 365 fd->lock = lock; 366 fd->hw.init = &init; 367 368 clk = clk_register(dev, &fd->hw); 369 if (IS_ERR(clk)) { 370 pr_err("%s: could not register clk %s\n", __func__, name); 371 kfree(fd); 372 return NULL; 373 } 374 375 return clk; 376 } 377 378 static void xgene_pmdclk_init(struct device_node *np) 379 { 380 const char *clk_name = np->full_name; 381 void __iomem *csr_reg; 382 struct resource res; 383 struct clk *clk; 384 u64 denom; 385 u32 flags = 0; 386 int rc; 387 388 /* Check if the entry is disabled */ 389 if (!of_device_is_available(np)) 390 return; 391 392 /* Parse the DTS register for resource */ 393 rc = of_address_to_resource(np, 0, &res); 394 if (rc != 0) { 395 pr_err("no DTS register for %pOF\n", np); 396 return; 397 } 398 csr_reg = of_iomap(np, 0); 399 if (!csr_reg) { 400 pr_err("Unable to map resource for %pOF\n", np); 401 return; 402 } 403 of_property_read_string(np, "clock-output-names", &clk_name); 404 405 denom = BIT(XGENE_CLK_PMD_WIDTH); 406 flags |= XGENE_CLK_PMD_SCALE_INVERTED; 407 408 clk = xgene_register_clk_pmd(NULL, clk_name, 409 of_clk_get_parent_name(np, 0), 0, 410 csr_reg, XGENE_CLK_PMD_SHIFT, 411 XGENE_CLK_PMD_WIDTH, denom, 412 flags, &clk_lock); 413 if (!IS_ERR(clk)) { 414 of_clk_add_provider(np, of_clk_src_simple_get, clk); 415 clk_register_clkdev(clk, clk_name, NULL); 416 pr_debug("Add %s clock\n", clk_name); 417 } else { 418 if (csr_reg) 419 iounmap(csr_reg); 420 } 421 } 422 423 /* IP Clock */ 424 struct xgene_dev_parameters { 425 void __iomem *csr_reg; /* CSR for IP clock */ 426 u32 reg_clk_offset; /* Offset to clock enable CSR */ 427 u32 reg_clk_mask; /* Mask bit for clock enable */ 428 u32 reg_csr_offset; /* Offset to CSR reset */ 429 u32 reg_csr_mask; /* Mask bit for disable CSR reset */ 430 void __iomem *divider_reg; /* CSR for divider */ 431 u32 reg_divider_offset; /* Offset to divider register */ 432 u32 reg_divider_shift; /* Bit shift to divider field */ 433 u32 reg_divider_width; /* Width of the bit to divider field */ 434 }; 435 436 struct xgene_clk { 437 struct clk_hw hw; 438 spinlock_t *lock; 439 struct xgene_dev_parameters param; 440 }; 441 442 #define to_xgene_clk(_hw) container_of(_hw, struct xgene_clk, hw) 443 444 static int xgene_clk_enable(struct clk_hw *hw) 445 { 446 struct xgene_clk *pclk = to_xgene_clk(hw); 447 unsigned long flags = 0; 448 u32 data; 449 450 if (pclk->lock) 451 spin_lock_irqsave(pclk->lock, flags); 452 453 if (pclk->param.csr_reg) { 454 pr_debug("%s clock enabled\n", clk_hw_get_name(hw)); 455 /* First enable the clock */ 456 data = xgene_clk_read(pclk->param.csr_reg + 457 pclk->param.reg_clk_offset); 458 data |= pclk->param.reg_clk_mask; 459 xgene_clk_write(data, pclk->param.csr_reg + 460 pclk->param.reg_clk_offset); 461 pr_debug("%s clk offset 0x%08X mask 0x%08X value 0x%08X\n", 462 clk_hw_get_name(hw), 463 pclk->param.reg_clk_offset, pclk->param.reg_clk_mask, 464 data); 465 466 /* Second enable the CSR */ 467 data = xgene_clk_read(pclk->param.csr_reg + 468 pclk->param.reg_csr_offset); 469 data &= ~pclk->param.reg_csr_mask; 470 xgene_clk_write(data, pclk->param.csr_reg + 471 pclk->param.reg_csr_offset); 472 pr_debug("%s csr offset 0x%08X mask 0x%08X value 0x%08X\n", 473 clk_hw_get_name(hw), 474 pclk->param.reg_csr_offset, pclk->param.reg_csr_mask, 475 data); 476 } 477 478 if (pclk->lock) 479 spin_unlock_irqrestore(pclk->lock, flags); 480 481 return 0; 482 } 483 484 static void xgene_clk_disable(struct clk_hw *hw) 485 { 486 struct xgene_clk *pclk = to_xgene_clk(hw); 487 unsigned long flags = 0; 488 u32 data; 489 490 if (pclk->lock) 491 spin_lock_irqsave(pclk->lock, flags); 492 493 if (pclk->param.csr_reg) { 494 pr_debug("%s clock disabled\n", clk_hw_get_name(hw)); 495 /* First put the CSR in reset */ 496 data = xgene_clk_read(pclk->param.csr_reg + 497 pclk->param.reg_csr_offset); 498 data |= pclk->param.reg_csr_mask; 499 xgene_clk_write(data, pclk->param.csr_reg + 500 pclk->param.reg_csr_offset); 501 502 /* Second disable the clock */ 503 data = xgene_clk_read(pclk->param.csr_reg + 504 pclk->param.reg_clk_offset); 505 data &= ~pclk->param.reg_clk_mask; 506 xgene_clk_write(data, pclk->param.csr_reg + 507 pclk->param.reg_clk_offset); 508 } 509 510 if (pclk->lock) 511 spin_unlock_irqrestore(pclk->lock, flags); 512 } 513 514 static int xgene_clk_is_enabled(struct clk_hw *hw) 515 { 516 struct xgene_clk *pclk = to_xgene_clk(hw); 517 u32 data = 0; 518 519 if (pclk->param.csr_reg) { 520 pr_debug("%s clock checking\n", clk_hw_get_name(hw)); 521 data = xgene_clk_read(pclk->param.csr_reg + 522 pclk->param.reg_clk_offset); 523 pr_debug("%s clock is %s\n", clk_hw_get_name(hw), 524 data & pclk->param.reg_clk_mask ? "enabled" : 525 "disabled"); 526 } 527 528 if (!pclk->param.csr_reg) 529 return 1; 530 return data & pclk->param.reg_clk_mask ? 1 : 0; 531 } 532 533 static unsigned long xgene_clk_recalc_rate(struct clk_hw *hw, 534 unsigned long parent_rate) 535 { 536 struct xgene_clk *pclk = to_xgene_clk(hw); 537 u32 data; 538 539 if (pclk->param.divider_reg) { 540 data = xgene_clk_read(pclk->param.divider_reg + 541 pclk->param.reg_divider_offset); 542 data >>= pclk->param.reg_divider_shift; 543 data &= (1 << pclk->param.reg_divider_width) - 1; 544 545 pr_debug("%s clock recalc rate %ld parent %ld\n", 546 clk_hw_get_name(hw), 547 parent_rate / data, parent_rate); 548 549 return parent_rate / data; 550 } else { 551 pr_debug("%s clock recalc rate %ld parent %ld\n", 552 clk_hw_get_name(hw), parent_rate, parent_rate); 553 return parent_rate; 554 } 555 } 556 557 static int xgene_clk_set_rate(struct clk_hw *hw, unsigned long rate, 558 unsigned long parent_rate) 559 { 560 struct xgene_clk *pclk = to_xgene_clk(hw); 561 unsigned long flags = 0; 562 u32 data; 563 u32 divider; 564 u32 divider_save; 565 566 if (pclk->lock) 567 spin_lock_irqsave(pclk->lock, flags); 568 569 if (pclk->param.divider_reg) { 570 /* Let's compute the divider */ 571 if (rate > parent_rate) 572 rate = parent_rate; 573 divider_save = divider = parent_rate / rate; /* Rounded down */ 574 divider &= (1 << pclk->param.reg_divider_width) - 1; 575 divider <<= pclk->param.reg_divider_shift; 576 577 /* Set new divider */ 578 data = xgene_clk_read(pclk->param.divider_reg + 579 pclk->param.reg_divider_offset); 580 data &= ~(((1 << pclk->param.reg_divider_width) - 1) 581 << pclk->param.reg_divider_shift); 582 data |= divider; 583 xgene_clk_write(data, pclk->param.divider_reg + 584 pclk->param.reg_divider_offset); 585 pr_debug("%s clock set rate %ld\n", clk_hw_get_name(hw), 586 parent_rate / divider_save); 587 } else { 588 divider_save = 1; 589 } 590 591 if (pclk->lock) 592 spin_unlock_irqrestore(pclk->lock, flags); 593 594 return parent_rate / divider_save; 595 } 596 597 static long xgene_clk_round_rate(struct clk_hw *hw, unsigned long rate, 598 unsigned long *prate) 599 { 600 struct xgene_clk *pclk = to_xgene_clk(hw); 601 unsigned long parent_rate = *prate; 602 u32 divider; 603 604 if (pclk->param.divider_reg) { 605 /* Let's compute the divider */ 606 if (rate > parent_rate) 607 rate = parent_rate; 608 divider = parent_rate / rate; /* Rounded down */ 609 } else { 610 divider = 1; 611 } 612 613 return parent_rate / divider; 614 } 615 616 static const struct clk_ops xgene_clk_ops = { 617 .enable = xgene_clk_enable, 618 .disable = xgene_clk_disable, 619 .is_enabled = xgene_clk_is_enabled, 620 .recalc_rate = xgene_clk_recalc_rate, 621 .set_rate = xgene_clk_set_rate, 622 .round_rate = xgene_clk_round_rate, 623 }; 624 625 static struct clk *xgene_register_clk(struct device *dev, 626 const char *name, const char *parent_name, 627 struct xgene_dev_parameters *parameters, spinlock_t *lock) 628 { 629 struct xgene_clk *apmclk; 630 struct clk *clk; 631 struct clk_init_data init; 632 int rc; 633 634 /* allocate the APM clock structure */ 635 apmclk = kzalloc(sizeof(*apmclk), GFP_KERNEL); 636 if (!apmclk) 637 return ERR_PTR(-ENOMEM); 638 639 init.name = name; 640 init.ops = &xgene_clk_ops; 641 init.flags = 0; 642 init.parent_names = parent_name ? &parent_name : NULL; 643 init.num_parents = parent_name ? 1 : 0; 644 645 apmclk->lock = lock; 646 apmclk->hw.init = &init; 647 apmclk->param = *parameters; 648 649 /* Register the clock */ 650 clk = clk_register(dev, &apmclk->hw); 651 if (IS_ERR(clk)) { 652 pr_err("%s: could not register clk %s\n", __func__, name); 653 kfree(apmclk); 654 return clk; 655 } 656 657 /* Register the clock for lookup */ 658 rc = clk_register_clkdev(clk, name, NULL); 659 if (rc != 0) { 660 pr_err("%s: could not register lookup clk %s\n", 661 __func__, name); 662 } 663 return clk; 664 } 665 666 static void __init xgene_devclk_init(struct device_node *np) 667 { 668 const char *clk_name = np->full_name; 669 struct clk *clk; 670 struct resource res; 671 int rc; 672 struct xgene_dev_parameters parameters; 673 int i; 674 675 /* Check if the entry is disabled */ 676 if (!of_device_is_available(np)) 677 return; 678 679 /* Parse the DTS register for resource */ 680 parameters.csr_reg = NULL; 681 parameters.divider_reg = NULL; 682 for (i = 0; i < 2; i++) { 683 void __iomem *map_res; 684 rc = of_address_to_resource(np, i, &res); 685 if (rc != 0) { 686 if (i == 0) { 687 pr_err("no DTS register for %pOF\n", np); 688 return; 689 } 690 break; 691 } 692 map_res = of_iomap(np, i); 693 if (!map_res) { 694 pr_err("Unable to map resource %d for %pOF\n", i, np); 695 goto err; 696 } 697 if (strcmp(res.name, "div-reg") == 0) 698 parameters.divider_reg = map_res; 699 else /* if (strcmp(res->name, "csr-reg") == 0) */ 700 parameters.csr_reg = map_res; 701 } 702 if (of_property_read_u32(np, "csr-offset", ¶meters.reg_csr_offset)) 703 parameters.reg_csr_offset = 0; 704 if (of_property_read_u32(np, "csr-mask", ¶meters.reg_csr_mask)) 705 parameters.reg_csr_mask = 0xF; 706 if (of_property_read_u32(np, "enable-offset", 707 ¶meters.reg_clk_offset)) 708 parameters.reg_clk_offset = 0x8; 709 if (of_property_read_u32(np, "enable-mask", ¶meters.reg_clk_mask)) 710 parameters.reg_clk_mask = 0xF; 711 if (of_property_read_u32(np, "divider-offset", 712 ¶meters.reg_divider_offset)) 713 parameters.reg_divider_offset = 0; 714 if (of_property_read_u32(np, "divider-width", 715 ¶meters.reg_divider_width)) 716 parameters.reg_divider_width = 0; 717 if (of_property_read_u32(np, "divider-shift", 718 ¶meters.reg_divider_shift)) 719 parameters.reg_divider_shift = 0; 720 of_property_read_string(np, "clock-output-names", &clk_name); 721 722 clk = xgene_register_clk(NULL, clk_name, 723 of_clk_get_parent_name(np, 0), ¶meters, &clk_lock); 724 if (IS_ERR(clk)) 725 goto err; 726 pr_debug("Add %s clock\n", clk_name); 727 rc = of_clk_add_provider(np, of_clk_src_simple_get, clk); 728 if (rc != 0) 729 pr_err("%s: could register provider clk %pOF\n", __func__, np); 730 731 return; 732 733 err: 734 if (parameters.csr_reg) 735 iounmap(parameters.csr_reg); 736 if (parameters.divider_reg) 737 iounmap(parameters.divider_reg); 738 } 739 740 CLK_OF_DECLARE(xgene_socpll_clock, "apm,xgene-socpll-clock", xgene_socpllclk_init); 741 CLK_OF_DECLARE(xgene_pcppll_clock, "apm,xgene-pcppll-clock", xgene_pcppllclk_init); 742 CLK_OF_DECLARE(xgene_pmd_clock, "apm,xgene-pmd-clock", xgene_pmdclk_init); 743 CLK_OF_DECLARE(xgene_socpll_v2_clock, "apm,xgene-socpll-v2-clock", 744 xgene_socpllclk_init); 745 CLK_OF_DECLARE(xgene_pcppll_v2_clock, "apm,xgene-pcppll-v2-clock", 746 xgene_pcppllclk_init); 747 CLK_OF_DECLARE(xgene_dev_clock, "apm,xgene-device-clock", xgene_devclk_init); 748