1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2018 Socionext Inc. 4 * Copyright (C) 2016 Linaro Ltd. 5 */ 6 7 #include <linux/clk-provider.h> 8 #include <linux/err.h> 9 #include <linux/io.h> 10 #include <linux/iopoll.h> 11 #include <linux/of_address.h> 12 #include <linux/platform_device.h> 13 #include <linux/slab.h> 14 #include <linux/spinlock.h> 15 16 #define M10V_CLKSEL1 0x0 17 #define CLKSEL(n) (((n) - 1) * 4 + M10V_CLKSEL1) 18 19 #define M10V_PLL1 "pll1" 20 #define M10V_PLL1DIV2 "pll1-2" 21 #define M10V_PLL2 "pll2" 22 #define M10V_PLL2DIV2 "pll2-2" 23 #define M10V_PLL6 "pll6" 24 #define M10V_PLL6DIV2 "pll6-2" 25 #define M10V_PLL6DIV3 "pll6-3" 26 #define M10V_PLL7 "pll7" 27 #define M10V_PLL7DIV2 "pll7-2" 28 #define M10V_PLL7DIV5 "pll7-5" 29 #define M10V_PLL9 "pll9" 30 #define M10V_PLL10 "pll10" 31 #define M10V_PLL10DIV2 "pll10-2" 32 #define M10V_PLL11 "pll11" 33 34 #define M10V_SPI_PARENT0 "spi-parent0" 35 #define M10V_SPI_PARENT1 "spi-parent1" 36 #define M10V_SPI_PARENT2 "spi-parent2" 37 #define M10V_UHS1CLK2_PARENT0 "uhs1clk2-parent0" 38 #define M10V_UHS1CLK2_PARENT1 "uhs1clk2-parent1" 39 #define M10V_UHS1CLK2_PARENT2 "uhs1clk2-parent2" 40 #define M10V_UHS1CLK1_PARENT0 "uhs1clk1-parent0" 41 #define M10V_UHS1CLK1_PARENT1 "uhs1clk1-parent1" 42 #define M10V_NFCLK_PARENT0 "nfclk-parent0" 43 #define M10V_NFCLK_PARENT1 "nfclk-parent1" 44 #define M10V_NFCLK_PARENT2 "nfclk-parent2" 45 #define M10V_NFCLK_PARENT3 "nfclk-parent3" 46 #define M10V_NFCLK_PARENT4 "nfclk-parent4" 47 #define M10V_NFCLK_PARENT5 "nfclk-parent5" 48 49 #define M10V_DCHREQ 1 50 #define M10V_UPOLL_RATE 1 51 #define M10V_UTIMEOUT 250 52 53 #define M10V_EMMCCLK_ID 0 54 #define M10V_ACLK_ID 1 55 #define M10V_HCLK_ID 2 56 #define M10V_PCLK_ID 3 57 #define M10V_RCLK_ID 4 58 #define M10V_SPICLK_ID 5 59 #define M10V_NFCLK_ID 6 60 #define M10V_UHS1CLK2_ID 7 61 #define M10V_NUM_CLKS 8 62 63 #define to_m10v_div(_hw) container_of(_hw, struct m10v_clk_divider, hw) 64 65 static struct clk_hw_onecell_data *m10v_clk_data; 66 67 static DEFINE_SPINLOCK(m10v_crglock); 68 69 struct m10v_clk_div_factors { 70 const char *name; 71 const char *parent_name; 72 u32 offset; 73 u8 shift; 74 u8 width; 75 const struct clk_div_table *table; 76 unsigned long div_flags; 77 int onecell_idx; 78 }; 79 80 struct m10v_clk_div_fixed_data { 81 const char *name; 82 const char *parent_name; 83 u8 div; 84 u8 mult; 85 int onecell_idx; 86 }; 87 88 struct m10v_clk_mux_factors { 89 const char *name; 90 const char * const *parent_names; 91 u8 num_parents; 92 u32 offset; 93 u8 shift; 94 u8 mask; 95 u32 *table; 96 unsigned long mux_flags; 97 int onecell_idx; 98 }; 99 100 static const struct clk_div_table emmcclk_table[] = { 101 { .val = 0, .div = 8 }, 102 { .val = 1, .div = 9 }, 103 { .val = 2, .div = 10 }, 104 { .val = 3, .div = 15 }, 105 { .div = 0 }, 106 }; 107 108 static const struct clk_div_table mclk400_table[] = { 109 { .val = 1, .div = 2 }, 110 { .val = 3, .div = 4 }, 111 { .div = 0 }, 112 }; 113 114 static const struct clk_div_table mclk200_table[] = { 115 { .val = 3, .div = 4 }, 116 { .val = 7, .div = 8 }, 117 { .div = 0 }, 118 }; 119 120 static const struct clk_div_table aclk400_table[] = { 121 { .val = 1, .div = 2 }, 122 { .val = 3, .div = 4 }, 123 { .div = 0 }, 124 }; 125 126 static const struct clk_div_table aclk300_table[] = { 127 { .val = 0, .div = 2 }, 128 { .val = 1, .div = 3 }, 129 { .div = 0 }, 130 }; 131 132 static const struct clk_div_table aclk_table[] = { 133 { .val = 3, .div = 4 }, 134 { .val = 7, .div = 8 }, 135 { .div = 0 }, 136 }; 137 138 static const struct clk_div_table aclkexs_table[] = { 139 { .val = 3, .div = 4 }, 140 { .val = 4, .div = 5 }, 141 { .val = 5, .div = 6 }, 142 { .val = 7, .div = 8 }, 143 { .div = 0 }, 144 }; 145 146 static const struct clk_div_table hclk_table[] = { 147 { .val = 7, .div = 8 }, 148 { .val = 15, .div = 16 }, 149 { .div = 0 }, 150 }; 151 152 static const struct clk_div_table hclkbmh_table[] = { 153 { .val = 3, .div = 4 }, 154 { .val = 7, .div = 8 }, 155 { .div = 0 }, 156 }; 157 158 static const struct clk_div_table pclk_table[] = { 159 { .val = 15, .div = 16 }, 160 { .val = 31, .div = 32 }, 161 { .div = 0 }, 162 }; 163 164 static const struct clk_div_table rclk_table[] = { 165 { .val = 0, .div = 8 }, 166 { .val = 1, .div = 16 }, 167 { .val = 2, .div = 24 }, 168 { .val = 3, .div = 32 }, 169 { .div = 0 }, 170 }; 171 172 static const struct clk_div_table uhs1clk0_table[] = { 173 { .val = 0, .div = 2 }, 174 { .val = 1, .div = 3 }, 175 { .val = 2, .div = 4 }, 176 { .val = 3, .div = 8 }, 177 { .val = 4, .div = 16 }, 178 { .div = 0 }, 179 }; 180 181 static const struct clk_div_table uhs2clk_table[] = { 182 { .val = 0, .div = 9 }, 183 { .val = 1, .div = 10 }, 184 { .val = 2, .div = 11 }, 185 { .val = 3, .div = 12 }, 186 { .val = 4, .div = 13 }, 187 { .val = 5, .div = 14 }, 188 { .val = 6, .div = 16 }, 189 { .val = 7, .div = 18 }, 190 { .div = 0 }, 191 }; 192 193 static u32 spi_mux_table[] = {0, 1, 2}; 194 static const char * const spi_mux_names[] = { 195 M10V_SPI_PARENT0, M10V_SPI_PARENT1, M10V_SPI_PARENT2 196 }; 197 198 static u32 uhs1clk2_mux_table[] = {2, 3, 4, 8}; 199 static const char * const uhs1clk2_mux_names[] = { 200 M10V_UHS1CLK2_PARENT0, M10V_UHS1CLK2_PARENT1, 201 M10V_UHS1CLK2_PARENT2, M10V_PLL6DIV2 202 }; 203 204 static u32 uhs1clk1_mux_table[] = {3, 4, 8}; 205 static const char * const uhs1clk1_mux_names[] = { 206 M10V_UHS1CLK1_PARENT0, M10V_UHS1CLK1_PARENT1, M10V_PLL6DIV2 207 }; 208 209 static u32 nfclk_mux_table[] = {0, 1, 2, 3, 4, 8}; 210 static const char * const nfclk_mux_names[] = { 211 M10V_NFCLK_PARENT0, M10V_NFCLK_PARENT1, M10V_NFCLK_PARENT2, 212 M10V_NFCLK_PARENT3, M10V_NFCLK_PARENT4, M10V_NFCLK_PARENT5 213 }; 214 215 static const struct m10v_clk_div_fixed_data m10v_pll_fixed_data[] = { 216 {M10V_PLL1, NULL, 1, 40, -1}, 217 {M10V_PLL2, NULL, 1, 30, -1}, 218 {M10V_PLL6, NULL, 1, 35, -1}, 219 {M10V_PLL7, NULL, 1, 40, -1}, 220 {M10V_PLL9, NULL, 1, 33, -1}, 221 {M10V_PLL10, NULL, 5, 108, -1}, 222 {M10V_PLL10DIV2, M10V_PLL10, 2, 1, -1}, 223 {M10V_PLL11, NULL, 2, 75, -1}, 224 }; 225 226 static const struct m10v_clk_div_fixed_data m10v_div_fixed_data[] = { 227 {"usb2", NULL, 2, 1, -1}, 228 {"pcisuppclk", NULL, 20, 1, -1}, 229 {M10V_PLL1DIV2, M10V_PLL1, 2, 1, -1}, 230 {M10V_PLL2DIV2, M10V_PLL2, 2, 1, -1}, 231 {M10V_PLL6DIV2, M10V_PLL6, 2, 1, -1}, 232 {M10V_PLL6DIV3, M10V_PLL6, 3, 1, -1}, 233 {M10V_PLL7DIV2, M10V_PLL7, 2, 1, -1}, 234 {M10V_PLL7DIV5, M10V_PLL7, 5, 1, -1}, 235 {"ca7wd", M10V_PLL2DIV2, 12, 1, -1}, 236 {"pclkca7wd", M10V_PLL1DIV2, 16, 1, -1}, 237 {M10V_SPI_PARENT0, M10V_PLL10DIV2, 2, 1, -1}, 238 {M10V_SPI_PARENT1, M10V_PLL10DIV2, 4, 1, -1}, 239 {M10V_SPI_PARENT2, M10V_PLL7DIV2, 8, 1, -1}, 240 {M10V_UHS1CLK2_PARENT0, M10V_PLL7, 4, 1, -1}, 241 {M10V_UHS1CLK2_PARENT1, M10V_PLL7, 8, 1, -1}, 242 {M10V_UHS1CLK2_PARENT2, M10V_PLL7, 16, 1, -1}, 243 {M10V_UHS1CLK1_PARENT0, M10V_PLL7, 8, 1, -1}, 244 {M10V_UHS1CLK1_PARENT1, M10V_PLL7, 16, 1, -1}, 245 {M10V_NFCLK_PARENT0, M10V_PLL7DIV2, 8, 1, -1}, 246 {M10V_NFCLK_PARENT1, M10V_PLL7DIV2, 10, 1, -1}, 247 {M10V_NFCLK_PARENT2, M10V_PLL7DIV2, 13, 1, -1}, 248 {M10V_NFCLK_PARENT3, M10V_PLL7DIV2, 16, 1, -1}, 249 {M10V_NFCLK_PARENT4, M10V_PLL7DIV2, 40, 1, -1}, 250 {M10V_NFCLK_PARENT5, M10V_PLL7DIV5, 10, 1, -1}, 251 }; 252 253 static const struct m10v_clk_div_factors m10v_div_factor_data[] = { 254 {"emmc", M10V_PLL11, CLKSEL(1), 28, 3, emmcclk_table, 0, 255 M10V_EMMCCLK_ID}, 256 {"mclk400", M10V_PLL1DIV2, CLKSEL(10), 7, 3, mclk400_table, 0, -1}, 257 {"mclk200", M10V_PLL1DIV2, CLKSEL(10), 3, 4, mclk200_table, 0, -1}, 258 {"aclk400", M10V_PLL1DIV2, CLKSEL(10), 0, 3, aclk400_table, 0, -1}, 259 {"aclk300", M10V_PLL2DIV2, CLKSEL(12), 0, 2, aclk300_table, 0, -1}, 260 {"aclk", M10V_PLL1DIV2, CLKSEL(9), 20, 4, aclk_table, 0, M10V_ACLK_ID}, 261 {"aclkexs", M10V_PLL1DIV2, CLKSEL(9), 16, 4, aclkexs_table, 0, -1}, 262 {"hclk", M10V_PLL1DIV2, CLKSEL(9), 7, 5, hclk_table, 0, M10V_HCLK_ID}, 263 {"hclkbmh", M10V_PLL1DIV2, CLKSEL(9), 12, 4, hclkbmh_table, 0, -1}, 264 {"pclk", M10V_PLL1DIV2, CLKSEL(9), 0, 7, pclk_table, 0, M10V_PCLK_ID}, 265 {"uhs1clk0", M10V_PLL7, CLKSEL(1), 3, 5, uhs1clk0_table, 0, -1}, 266 {"uhs2clk", M10V_PLL6DIV3, CLKSEL(1), 18, 4, uhs2clk_table, 0, -1}, 267 }; 268 269 static const struct m10v_clk_mux_factors m10v_mux_factor_data[] = { 270 {"spi", spi_mux_names, ARRAY_SIZE(spi_mux_names), 271 CLKSEL(8), 3, 7, spi_mux_table, 0, M10V_SPICLK_ID}, 272 {"uhs1clk2", uhs1clk2_mux_names, ARRAY_SIZE(uhs1clk2_mux_names), 273 CLKSEL(1), 13, 31, uhs1clk2_mux_table, 0, M10V_UHS1CLK2_ID}, 274 {"uhs1clk1", uhs1clk1_mux_names, ARRAY_SIZE(uhs1clk1_mux_names), 275 CLKSEL(1), 8, 31, uhs1clk1_mux_table, 0, -1}, 276 {"nfclk", nfclk_mux_names, ARRAY_SIZE(nfclk_mux_names), 277 CLKSEL(1), 22, 127, nfclk_mux_table, 0, M10V_NFCLK_ID}, 278 }; 279 280 static u8 m10v_mux_get_parent(struct clk_hw *hw) 281 { 282 struct clk_mux *mux = to_clk_mux(hw); 283 u32 val; 284 285 val = readl(mux->reg) >> mux->shift; 286 val &= mux->mask; 287 288 return clk_mux_val_to_index(hw, mux->table, mux->flags, val); 289 } 290 291 static int m10v_mux_set_parent(struct clk_hw *hw, u8 index) 292 { 293 struct clk_mux *mux = to_clk_mux(hw); 294 u32 val = clk_mux_index_to_val(mux->table, mux->flags, index); 295 unsigned long flags = 0; 296 u32 reg; 297 u32 write_en = BIT(fls(mux->mask) - 1); 298 299 if (mux->lock) 300 spin_lock_irqsave(mux->lock, flags); 301 else 302 __acquire(mux->lock); 303 304 reg = readl(mux->reg); 305 reg &= ~(mux->mask << mux->shift); 306 307 val = (val | write_en) << mux->shift; 308 reg |= val; 309 writel(reg, mux->reg); 310 311 if (mux->lock) 312 spin_unlock_irqrestore(mux->lock, flags); 313 else 314 __release(mux->lock); 315 316 return 0; 317 } 318 319 static const struct clk_ops m10v_mux_ops = { 320 .get_parent = m10v_mux_get_parent, 321 .set_parent = m10v_mux_set_parent, 322 .determine_rate = __clk_mux_determine_rate, 323 }; 324 325 static struct clk_hw *m10v_clk_hw_register_mux(struct device *dev, 326 const char *name, const char * const *parent_names, 327 u8 num_parents, unsigned long flags, void __iomem *reg, 328 u8 shift, u32 mask, u8 clk_mux_flags, u32 *table, 329 spinlock_t *lock) 330 { 331 struct clk_mux *mux; 332 struct clk_hw *hw; 333 struct clk_init_data init; 334 int ret; 335 336 mux = kzalloc(sizeof(*mux), GFP_KERNEL); 337 if (!mux) 338 return ERR_PTR(-ENOMEM); 339 340 init.name = name; 341 init.ops = &m10v_mux_ops; 342 init.flags = flags; 343 init.parent_names = parent_names; 344 init.num_parents = num_parents; 345 346 mux->reg = reg; 347 mux->shift = shift; 348 mux->mask = mask; 349 mux->flags = clk_mux_flags; 350 mux->lock = lock; 351 mux->table = table; 352 mux->hw.init = &init; 353 354 hw = &mux->hw; 355 ret = clk_hw_register(dev, hw); 356 if (ret) { 357 kfree(mux); 358 hw = ERR_PTR(ret); 359 } 360 361 return hw; 362 363 } 364 365 struct m10v_clk_divider { 366 struct clk_hw hw; 367 void __iomem *reg; 368 u8 shift; 369 u8 width; 370 u8 flags; 371 const struct clk_div_table *table; 372 spinlock_t *lock; 373 void __iomem *write_valid_reg; 374 }; 375 376 static unsigned long m10v_clk_divider_recalc_rate(struct clk_hw *hw, 377 unsigned long parent_rate) 378 { 379 struct m10v_clk_divider *divider = to_m10v_div(hw); 380 unsigned int val; 381 382 val = readl(divider->reg) >> divider->shift; 383 val &= clk_div_mask(divider->width); 384 385 return divider_recalc_rate(hw, parent_rate, val, divider->table, 386 divider->flags, divider->width); 387 } 388 389 static long m10v_clk_divider_round_rate(struct clk_hw *hw, unsigned long rate, 390 unsigned long *prate) 391 { 392 struct m10v_clk_divider *divider = to_m10v_div(hw); 393 394 /* if read only, just return current value */ 395 if (divider->flags & CLK_DIVIDER_READ_ONLY) { 396 u32 val; 397 398 val = readl(divider->reg) >> divider->shift; 399 val &= clk_div_mask(divider->width); 400 401 return divider_ro_round_rate(hw, rate, prate, divider->table, 402 divider->width, divider->flags, 403 val); 404 } 405 406 return divider_round_rate(hw, rate, prate, divider->table, 407 divider->width, divider->flags); 408 } 409 410 static int m10v_clk_divider_set_rate(struct clk_hw *hw, unsigned long rate, 411 unsigned long parent_rate) 412 { 413 struct m10v_clk_divider *divider = to_m10v_div(hw); 414 int value; 415 unsigned long flags = 0; 416 u32 val; 417 u32 write_en = BIT(divider->width - 1); 418 419 value = divider_get_val(rate, parent_rate, divider->table, 420 divider->width, divider->flags); 421 if (value < 0) 422 return value; 423 424 if (divider->lock) 425 spin_lock_irqsave(divider->lock, flags); 426 else 427 __acquire(divider->lock); 428 429 val = readl(divider->reg); 430 val &= ~(clk_div_mask(divider->width) << divider->shift); 431 432 val |= ((u32)value | write_en) << divider->shift; 433 writel(val, divider->reg); 434 435 if (divider->write_valid_reg) { 436 writel(M10V_DCHREQ, divider->write_valid_reg); 437 if (readl_poll_timeout(divider->write_valid_reg, val, 438 !val, M10V_UPOLL_RATE, M10V_UTIMEOUT)) 439 pr_err("%s:%s couldn't stabilize\n", 440 __func__, clk_hw_get_name(hw)); 441 } 442 443 if (divider->lock) 444 spin_unlock_irqrestore(divider->lock, flags); 445 else 446 __release(divider->lock); 447 448 return 0; 449 } 450 451 static const struct clk_ops m10v_clk_divider_ops = { 452 .recalc_rate = m10v_clk_divider_recalc_rate, 453 .round_rate = m10v_clk_divider_round_rate, 454 .set_rate = m10v_clk_divider_set_rate, 455 }; 456 457 static struct clk_hw *m10v_clk_hw_register_divider(struct device *dev, 458 const char *name, const char *parent_name, unsigned long flags, 459 void __iomem *reg, u8 shift, u8 width, 460 u8 clk_divider_flags, const struct clk_div_table *table, 461 spinlock_t *lock, void __iomem *write_valid_reg) 462 { 463 struct m10v_clk_divider *div; 464 struct clk_hw *hw; 465 struct clk_init_data init; 466 int ret; 467 468 div = kzalloc(sizeof(*div), GFP_KERNEL); 469 if (!div) 470 return ERR_PTR(-ENOMEM); 471 472 init.name = name; 473 init.ops = &m10v_clk_divider_ops; 474 init.flags = flags; 475 init.parent_names = &parent_name; 476 init.num_parents = 1; 477 478 div->reg = reg; 479 div->shift = shift; 480 div->width = width; 481 div->flags = clk_divider_flags; 482 div->lock = lock; 483 div->hw.init = &init; 484 div->table = table; 485 div->write_valid_reg = write_valid_reg; 486 487 /* register the clock */ 488 hw = &div->hw; 489 ret = clk_hw_register(dev, hw); 490 if (ret) { 491 kfree(div); 492 hw = ERR_PTR(ret); 493 } 494 495 return hw; 496 } 497 498 static void m10v_reg_div_pre(const struct m10v_clk_div_factors *factors, 499 struct clk_hw_onecell_data *clk_data, 500 void __iomem *base) 501 { 502 struct clk_hw *hw; 503 void __iomem *write_valid_reg; 504 505 /* 506 * The registers on CLKSEL(9) or CLKSEL(10) need additional 507 * writing to become valid. 508 */ 509 if ((factors->offset == CLKSEL(9)) || (factors->offset == CLKSEL(10))) 510 write_valid_reg = base + CLKSEL(11); 511 else 512 write_valid_reg = NULL; 513 514 hw = m10v_clk_hw_register_divider(NULL, factors->name, 515 factors->parent_name, 516 CLK_SET_RATE_PARENT, 517 base + factors->offset, 518 factors->shift, 519 factors->width, factors->div_flags, 520 factors->table, 521 &m10v_crglock, write_valid_reg); 522 523 if (factors->onecell_idx >= 0) 524 clk_data->hws[factors->onecell_idx] = hw; 525 } 526 527 static void m10v_reg_fixed_pre(const struct m10v_clk_div_fixed_data *factors, 528 struct clk_hw_onecell_data *clk_data, 529 const char *parent_name) 530 { 531 struct clk_hw *hw; 532 const char *pn = factors->parent_name ? 533 factors->parent_name : parent_name; 534 535 hw = clk_hw_register_fixed_factor(NULL, factors->name, pn, 0, 536 factors->mult, factors->div); 537 538 if (factors->onecell_idx >= 0) 539 clk_data->hws[factors->onecell_idx] = hw; 540 } 541 542 static void m10v_reg_mux_pre(const struct m10v_clk_mux_factors *factors, 543 struct clk_hw_onecell_data *clk_data, 544 void __iomem *base) 545 { 546 struct clk_hw *hw; 547 548 hw = m10v_clk_hw_register_mux(NULL, factors->name, 549 factors->parent_names, 550 factors->num_parents, 551 CLK_SET_RATE_PARENT, 552 base + factors->offset, factors->shift, 553 factors->mask, factors->mux_flags, 554 factors->table, &m10v_crglock); 555 556 if (factors->onecell_idx >= 0) 557 clk_data->hws[factors->onecell_idx] = hw; 558 } 559 560 static int m10v_clk_probe(struct platform_device *pdev) 561 { 562 int id; 563 struct resource *res; 564 struct device *dev = &pdev->dev; 565 struct device_node *np = dev->of_node; 566 void __iomem *base; 567 const char *parent_name; 568 569 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 570 base = devm_ioremap_resource(dev, res); 571 if (IS_ERR(base)) 572 return PTR_ERR(base); 573 574 parent_name = of_clk_get_parent_name(np, 0); 575 576 for (id = 0; id < ARRAY_SIZE(m10v_div_factor_data); ++id) 577 m10v_reg_div_pre(&m10v_div_factor_data[id], 578 m10v_clk_data, base); 579 580 for (id = 0; id < ARRAY_SIZE(m10v_div_fixed_data); ++id) 581 m10v_reg_fixed_pre(&m10v_div_fixed_data[id], 582 m10v_clk_data, parent_name); 583 584 for (id = 0; id < ARRAY_SIZE(m10v_mux_factor_data); ++id) 585 m10v_reg_mux_pre(&m10v_mux_factor_data[id], 586 m10v_clk_data, base); 587 588 for (id = 0; id < M10V_NUM_CLKS; id++) { 589 if (IS_ERR(m10v_clk_data->hws[id])) 590 return PTR_ERR(m10v_clk_data->hws[id]); 591 } 592 593 return 0; 594 } 595 596 static const struct of_device_id m10v_clk_dt_ids[] = { 597 { .compatible = "socionext,milbeaut-m10v-ccu", }, 598 { } 599 }; 600 601 static struct platform_driver m10v_clk_driver = { 602 .probe = m10v_clk_probe, 603 .driver = { 604 .name = "m10v-ccu", 605 .of_match_table = m10v_clk_dt_ids, 606 }, 607 }; 608 builtin_platform_driver(m10v_clk_driver); 609 610 static void __init m10v_cc_init(struct device_node *np) 611 { 612 int id; 613 void __iomem *base; 614 const char *parent_name; 615 struct clk_hw *hw; 616 617 m10v_clk_data = kzalloc(struct_size(m10v_clk_data, hws, 618 M10V_NUM_CLKS), 619 GFP_KERNEL); 620 621 if (!m10v_clk_data) 622 return; 623 624 base = of_iomap(np, 0); 625 if (!base) { 626 kfree(m10v_clk_data); 627 return; 628 } 629 630 parent_name = of_clk_get_parent_name(np, 0); 631 if (!parent_name) { 632 kfree(m10v_clk_data); 633 iounmap(base); 634 return; 635 } 636 637 /* 638 * This way all clocks fetched before the platform device probes, 639 * except those we assign here for early use, will be deferred. 640 */ 641 for (id = 0; id < M10V_NUM_CLKS; id++) 642 m10v_clk_data->hws[id] = ERR_PTR(-EPROBE_DEFER); 643 644 /* 645 * PLLs are set by bootloader so this driver registers them as the 646 * fixed factor. 647 */ 648 for (id = 0; id < ARRAY_SIZE(m10v_pll_fixed_data); ++id) 649 m10v_reg_fixed_pre(&m10v_pll_fixed_data[id], 650 m10v_clk_data, parent_name); 651 652 /* 653 * timer consumes "rclk" so it needs to register here. 654 */ 655 hw = m10v_clk_hw_register_divider(NULL, "rclk", M10V_PLL10DIV2, 0, 656 base + CLKSEL(1), 0, 3, 0, rclk_table, 657 &m10v_crglock, NULL); 658 m10v_clk_data->hws[M10V_RCLK_ID] = hw; 659 660 m10v_clk_data->num = M10V_NUM_CLKS; 661 of_clk_add_hw_provider(np, of_clk_hw_onecell_get, m10v_clk_data); 662 } 663 CLK_OF_DECLARE_DRIVER(m10v_cc, "socionext,milbeaut-m10v-ccu", m10v_cc_init); 664