1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Clock driver for DA8xx/AM17xx/AM18xx/OMAP-L13x CFGCHIP 4 * 5 * Copyright (C) 2018 David Lechner <david@lechnology.com> 6 */ 7 8 #include <linux/clk-provider.h> 9 #include <linux/clk.h> 10 #include <linux/clkdev.h> 11 #include <linux/init.h> 12 #include <linux/mfd/da8xx-cfgchip.h> 13 #include <linux/mfd/syscon.h> 14 #include <linux/of_device.h> 15 #include <linux/of.h> 16 #include <linux/platform_data/clk-da8xx-cfgchip.h> 17 #include <linux/platform_device.h> 18 #include <linux/regmap.h> 19 #include <linux/slab.h> 20 21 /* --- Gate clocks --- */ 22 23 #define DA8XX_GATE_CLOCK_IS_DIV4P5 BIT(1) 24 25 struct da8xx_cfgchip_gate_clk_info { 26 const char *name; 27 u32 cfgchip; 28 u32 bit; 29 u32 flags; 30 }; 31 32 struct da8xx_cfgchip_gate_clk { 33 struct clk_hw hw; 34 struct regmap *regmap; 35 u32 reg; 36 u32 mask; 37 }; 38 39 #define to_da8xx_cfgchip_gate_clk(_hw) \ 40 container_of((_hw), struct da8xx_cfgchip_gate_clk, hw) 41 42 static int da8xx_cfgchip_gate_clk_enable(struct clk_hw *hw) 43 { 44 struct da8xx_cfgchip_gate_clk *clk = to_da8xx_cfgchip_gate_clk(hw); 45 46 return regmap_write_bits(clk->regmap, clk->reg, clk->mask, clk->mask); 47 } 48 49 static void da8xx_cfgchip_gate_clk_disable(struct clk_hw *hw) 50 { 51 struct da8xx_cfgchip_gate_clk *clk = to_da8xx_cfgchip_gate_clk(hw); 52 53 regmap_write_bits(clk->regmap, clk->reg, clk->mask, 0); 54 } 55 56 static int da8xx_cfgchip_gate_clk_is_enabled(struct clk_hw *hw) 57 { 58 struct da8xx_cfgchip_gate_clk *clk = to_da8xx_cfgchip_gate_clk(hw); 59 unsigned int val; 60 61 regmap_read(clk->regmap, clk->reg, &val); 62 63 return !!(val & clk->mask); 64 } 65 66 static unsigned long da8xx_cfgchip_div4p5_recalc_rate(struct clk_hw *hw, 67 unsigned long parent_rate) 68 { 69 /* this clock divides by 4.5 */ 70 return parent_rate * 2 / 9; 71 } 72 73 static const struct clk_ops da8xx_cfgchip_gate_clk_ops = { 74 .enable = da8xx_cfgchip_gate_clk_enable, 75 .disable = da8xx_cfgchip_gate_clk_disable, 76 .is_enabled = da8xx_cfgchip_gate_clk_is_enabled, 77 }; 78 79 static const struct clk_ops da8xx_cfgchip_div4p5_clk_ops = { 80 .enable = da8xx_cfgchip_gate_clk_enable, 81 .disable = da8xx_cfgchip_gate_clk_disable, 82 .is_enabled = da8xx_cfgchip_gate_clk_is_enabled, 83 .recalc_rate = da8xx_cfgchip_div4p5_recalc_rate, 84 }; 85 86 static struct da8xx_cfgchip_gate_clk * __init 87 da8xx_cfgchip_gate_clk_register(struct device *dev, 88 const struct da8xx_cfgchip_gate_clk_info *info, 89 struct regmap *regmap) 90 { 91 struct clk *parent; 92 const char *parent_name; 93 struct da8xx_cfgchip_gate_clk *gate; 94 struct clk_init_data init; 95 int ret; 96 97 parent = devm_clk_get(dev, NULL); 98 if (IS_ERR(parent)) 99 return ERR_CAST(parent); 100 101 parent_name = __clk_get_name(parent); 102 103 gate = devm_kzalloc(dev, sizeof(*gate), GFP_KERNEL); 104 if (!gate) 105 return ERR_PTR(-ENOMEM); 106 107 init.name = info->name; 108 if (info->flags & DA8XX_GATE_CLOCK_IS_DIV4P5) 109 init.ops = &da8xx_cfgchip_div4p5_clk_ops; 110 else 111 init.ops = &da8xx_cfgchip_gate_clk_ops; 112 init.parent_names = &parent_name; 113 init.num_parents = 1; 114 init.flags = 0; 115 116 gate->hw.init = &init; 117 gate->regmap = regmap; 118 gate->reg = info->cfgchip; 119 gate->mask = info->bit; 120 121 ret = devm_clk_hw_register(dev, &gate->hw); 122 if (ret < 0) 123 return ERR_PTR(ret); 124 125 return gate; 126 } 127 128 static const struct da8xx_cfgchip_gate_clk_info da8xx_tbclksync_info __initconst = { 129 .name = "ehrpwm_tbclk", 130 .cfgchip = CFGCHIP(1), 131 .bit = CFGCHIP1_TBCLKSYNC, 132 }; 133 134 static int __init da8xx_cfgchip_register_tbclk(struct device *dev, 135 struct regmap *regmap) 136 { 137 struct da8xx_cfgchip_gate_clk *gate; 138 139 gate = da8xx_cfgchip_gate_clk_register(dev, &da8xx_tbclksync_info, 140 regmap); 141 if (IS_ERR(gate)) 142 return PTR_ERR(gate); 143 144 clk_hw_register_clkdev(&gate->hw, "tbclk", "ehrpwm.0"); 145 clk_hw_register_clkdev(&gate->hw, "tbclk", "ehrpwm.1"); 146 147 return 0; 148 } 149 150 static const struct da8xx_cfgchip_gate_clk_info da8xx_div4p5ena_info __initconst = { 151 .name = "div4.5", 152 .cfgchip = CFGCHIP(3), 153 .bit = CFGCHIP3_DIV45PENA, 154 .flags = DA8XX_GATE_CLOCK_IS_DIV4P5, 155 }; 156 157 static int __init da8xx_cfgchip_register_div4p5(struct device *dev, 158 struct regmap *regmap) 159 { 160 struct da8xx_cfgchip_gate_clk *gate; 161 162 gate = da8xx_cfgchip_gate_clk_register(dev, &da8xx_div4p5ena_info, regmap); 163 if (IS_ERR(gate)) 164 return PTR_ERR(gate); 165 166 return 0; 167 } 168 169 static int __init 170 of_da8xx_cfgchip_gate_clk_init(struct device *dev, 171 const struct da8xx_cfgchip_gate_clk_info *info, 172 struct regmap *regmap) 173 { 174 struct da8xx_cfgchip_gate_clk *gate; 175 176 gate = da8xx_cfgchip_gate_clk_register(dev, info, regmap); 177 if (IS_ERR(gate)) 178 return PTR_ERR(gate); 179 180 return devm_of_clk_add_hw_provider(dev, of_clk_hw_simple_get, gate); 181 } 182 183 static int __init of_da8xx_tbclksync_init(struct device *dev, 184 struct regmap *regmap) 185 { 186 return of_da8xx_cfgchip_gate_clk_init(dev, &da8xx_tbclksync_info, regmap); 187 } 188 189 static int __init of_da8xx_div4p5ena_init(struct device *dev, 190 struct regmap *regmap) 191 { 192 return of_da8xx_cfgchip_gate_clk_init(dev, &da8xx_div4p5ena_info, regmap); 193 } 194 195 /* --- MUX clocks --- */ 196 197 struct da8xx_cfgchip_mux_clk_info { 198 const char *name; 199 const char *parent0; 200 const char *parent1; 201 u32 cfgchip; 202 u32 bit; 203 }; 204 205 struct da8xx_cfgchip_mux_clk { 206 struct clk_hw hw; 207 struct regmap *regmap; 208 u32 reg; 209 u32 mask; 210 }; 211 212 #define to_da8xx_cfgchip_mux_clk(_hw) \ 213 container_of((_hw), struct da8xx_cfgchip_mux_clk, hw) 214 215 static int da8xx_cfgchip_mux_clk_set_parent(struct clk_hw *hw, u8 index) 216 { 217 struct da8xx_cfgchip_mux_clk *clk = to_da8xx_cfgchip_mux_clk(hw); 218 unsigned int val = index ? clk->mask : 0; 219 220 return regmap_write_bits(clk->regmap, clk->reg, clk->mask, val); 221 } 222 223 static u8 da8xx_cfgchip_mux_clk_get_parent(struct clk_hw *hw) 224 { 225 struct da8xx_cfgchip_mux_clk *clk = to_da8xx_cfgchip_mux_clk(hw); 226 unsigned int val; 227 228 regmap_read(clk->regmap, clk->reg, &val); 229 230 return (val & clk->mask) ? 1 : 0; 231 } 232 233 static const struct clk_ops da8xx_cfgchip_mux_clk_ops = { 234 .set_parent = da8xx_cfgchip_mux_clk_set_parent, 235 .get_parent = da8xx_cfgchip_mux_clk_get_parent, 236 }; 237 238 static struct da8xx_cfgchip_mux_clk * __init 239 da8xx_cfgchip_mux_clk_register(struct device *dev, 240 const struct da8xx_cfgchip_mux_clk_info *info, 241 struct regmap *regmap) 242 { 243 const char * const parent_names[] = { info->parent0, info->parent1 }; 244 struct da8xx_cfgchip_mux_clk *mux; 245 struct clk_init_data init; 246 int ret; 247 248 mux = devm_kzalloc(dev, sizeof(*mux), GFP_KERNEL); 249 if (!mux) 250 return ERR_PTR(-ENOMEM); 251 252 init.name = info->name; 253 init.ops = &da8xx_cfgchip_mux_clk_ops; 254 init.parent_names = parent_names; 255 init.num_parents = 2; 256 init.flags = 0; 257 258 mux->hw.init = &init; 259 mux->regmap = regmap; 260 mux->reg = info->cfgchip; 261 mux->mask = info->bit; 262 263 ret = devm_clk_hw_register(dev, &mux->hw); 264 if (ret < 0) 265 return ERR_PTR(ret); 266 267 return mux; 268 } 269 270 static const struct da8xx_cfgchip_mux_clk_info da850_async1_info __initconst = { 271 .name = "async1", 272 .parent0 = "pll0_sysclk3", 273 .parent1 = "div4.5", 274 .cfgchip = CFGCHIP(3), 275 .bit = CFGCHIP3_EMA_CLKSRC, 276 }; 277 278 static int __init da8xx_cfgchip_register_async1(struct device *dev, 279 struct regmap *regmap) 280 { 281 struct da8xx_cfgchip_mux_clk *mux; 282 283 mux = da8xx_cfgchip_mux_clk_register(dev, &da850_async1_info, regmap); 284 if (IS_ERR(mux)) 285 return PTR_ERR(mux); 286 287 clk_hw_register_clkdev(&mux->hw, "async1", "da850-psc0"); 288 289 return 0; 290 } 291 292 static const struct da8xx_cfgchip_mux_clk_info da850_async3_info __initconst = { 293 .name = "async3", 294 .parent0 = "pll0_sysclk2", 295 .parent1 = "pll1_sysclk2", 296 .cfgchip = CFGCHIP(3), 297 .bit = CFGCHIP3_ASYNC3_CLKSRC, 298 }; 299 300 static int __init da850_cfgchip_register_async3(struct device *dev, 301 struct regmap *regmap) 302 { 303 struct da8xx_cfgchip_mux_clk *mux; 304 struct clk_hw *parent; 305 306 mux = da8xx_cfgchip_mux_clk_register(dev, &da850_async3_info, regmap); 307 if (IS_ERR(mux)) 308 return PTR_ERR(mux); 309 310 clk_hw_register_clkdev(&mux->hw, "async3", "da850-psc1"); 311 312 /* pll1_sysclk2 is not affected by CPU scaling, so use it for async3 */ 313 parent = clk_hw_get_parent_by_index(&mux->hw, 1); 314 if (parent) 315 clk_set_parent(mux->hw.clk, parent->clk); 316 else 317 dev_warn(dev, "Failed to find async3 parent clock\n"); 318 319 return 0; 320 } 321 322 static int __init 323 of_da8xx_cfgchip_init_mux_clock(struct device *dev, 324 const struct da8xx_cfgchip_mux_clk_info *info, 325 struct regmap *regmap) 326 { 327 struct da8xx_cfgchip_mux_clk *mux; 328 329 mux = da8xx_cfgchip_mux_clk_register(dev, info, regmap); 330 if (IS_ERR(mux)) 331 return PTR_ERR(mux); 332 333 return devm_of_clk_add_hw_provider(dev, of_clk_hw_simple_get, &mux->hw); 334 } 335 336 static int __init of_da850_async1_init(struct device *dev, struct regmap *regmap) 337 { 338 return of_da8xx_cfgchip_init_mux_clock(dev, &da850_async1_info, regmap); 339 } 340 341 static int __init of_da850_async3_init(struct device *dev, struct regmap *regmap) 342 { 343 return of_da8xx_cfgchip_init_mux_clock(dev, &da850_async3_info, regmap); 344 } 345 346 /* --- USB 2.0 PHY clock --- */ 347 348 struct da8xx_usb0_clk48 { 349 struct clk_hw hw; 350 struct clk *fck; 351 struct regmap *regmap; 352 }; 353 354 #define to_da8xx_usb0_clk48(_hw) \ 355 container_of((_hw), struct da8xx_usb0_clk48, hw) 356 357 static int da8xx_usb0_clk48_prepare(struct clk_hw *hw) 358 { 359 struct da8xx_usb0_clk48 *usb0 = to_da8xx_usb0_clk48(hw); 360 361 /* The USB 2.0 PSC clock is only needed temporarily during the USB 2.0 362 * PHY clock enable, but since clk_prepare() can't be called in an 363 * atomic context (i.e. in clk_enable()), we have to prepare it here. 364 */ 365 return clk_prepare(usb0->fck); 366 } 367 368 static void da8xx_usb0_clk48_unprepare(struct clk_hw *hw) 369 { 370 struct da8xx_usb0_clk48 *usb0 = to_da8xx_usb0_clk48(hw); 371 372 clk_unprepare(usb0->fck); 373 } 374 375 static int da8xx_usb0_clk48_enable(struct clk_hw *hw) 376 { 377 struct da8xx_usb0_clk48 *usb0 = to_da8xx_usb0_clk48(hw); 378 unsigned int mask, val; 379 int ret; 380 381 /* Locking the USB 2.O PLL requires that the USB 2.O PSC is enabled 382 * temporaily. It can be turned back off once the PLL is locked. 383 */ 384 clk_enable(usb0->fck); 385 386 /* Turn on the USB 2.0 PHY, but just the PLL, and not OTG. The USB 1.1 387 * PHY may use the USB 2.0 PLL clock without USB 2.0 OTG being used. 388 */ 389 mask = CFGCHIP2_RESET | CFGCHIP2_PHYPWRDN | CFGCHIP2_PHY_PLLON; 390 val = CFGCHIP2_PHY_PLLON; 391 392 regmap_write_bits(usb0->regmap, CFGCHIP(2), mask, val); 393 ret = regmap_read_poll_timeout(usb0->regmap, CFGCHIP(2), val, 394 val & CFGCHIP2_PHYCLKGD, 0, 500000); 395 396 clk_disable(usb0->fck); 397 398 return ret; 399 } 400 401 static void da8xx_usb0_clk48_disable(struct clk_hw *hw) 402 { 403 struct da8xx_usb0_clk48 *usb0 = to_da8xx_usb0_clk48(hw); 404 unsigned int val; 405 406 val = CFGCHIP2_PHYPWRDN; 407 regmap_write_bits(usb0->regmap, CFGCHIP(2), val, val); 408 } 409 410 static int da8xx_usb0_clk48_is_enabled(struct clk_hw *hw) 411 { 412 struct da8xx_usb0_clk48 *usb0 = to_da8xx_usb0_clk48(hw); 413 unsigned int val; 414 415 regmap_read(usb0->regmap, CFGCHIP(2), &val); 416 417 return !!(val & CFGCHIP2_PHYCLKGD); 418 } 419 420 static unsigned long da8xx_usb0_clk48_recalc_rate(struct clk_hw *hw, 421 unsigned long parent_rate) 422 { 423 struct da8xx_usb0_clk48 *usb0 = to_da8xx_usb0_clk48(hw); 424 unsigned int mask, val; 425 426 /* The parent clock rate must be one of the following */ 427 mask = CFGCHIP2_REFFREQ_MASK; 428 switch (parent_rate) { 429 case 12000000: 430 val = CFGCHIP2_REFFREQ_12MHZ; 431 break; 432 case 13000000: 433 val = CFGCHIP2_REFFREQ_13MHZ; 434 break; 435 case 19200000: 436 val = CFGCHIP2_REFFREQ_19_2MHZ; 437 break; 438 case 20000000: 439 val = CFGCHIP2_REFFREQ_20MHZ; 440 break; 441 case 24000000: 442 val = CFGCHIP2_REFFREQ_24MHZ; 443 break; 444 case 26000000: 445 val = CFGCHIP2_REFFREQ_26MHZ; 446 break; 447 case 38400000: 448 val = CFGCHIP2_REFFREQ_38_4MHZ; 449 break; 450 case 40000000: 451 val = CFGCHIP2_REFFREQ_40MHZ; 452 break; 453 case 48000000: 454 val = CFGCHIP2_REFFREQ_48MHZ; 455 break; 456 default: 457 return 0; 458 } 459 460 regmap_write_bits(usb0->regmap, CFGCHIP(2), mask, val); 461 462 /* USB 2.0 PLL always supplies 48MHz */ 463 return 48000000; 464 } 465 466 static long da8xx_usb0_clk48_round_rate(struct clk_hw *hw, unsigned long rate, 467 unsigned long *parent_rate) 468 { 469 return 48000000; 470 } 471 472 static int da8xx_usb0_clk48_set_parent(struct clk_hw *hw, u8 index) 473 { 474 struct da8xx_usb0_clk48 *usb0 = to_da8xx_usb0_clk48(hw); 475 476 return regmap_write_bits(usb0->regmap, CFGCHIP(2), 477 CFGCHIP2_USB2PHYCLKMUX, 478 index ? CFGCHIP2_USB2PHYCLKMUX : 0); 479 } 480 481 static u8 da8xx_usb0_clk48_get_parent(struct clk_hw *hw) 482 { 483 struct da8xx_usb0_clk48 *usb0 = to_da8xx_usb0_clk48(hw); 484 unsigned int val; 485 486 regmap_read(usb0->regmap, CFGCHIP(2), &val); 487 488 return (val & CFGCHIP2_USB2PHYCLKMUX) ? 1 : 0; 489 } 490 491 static const struct clk_ops da8xx_usb0_clk48_ops = { 492 .prepare = da8xx_usb0_clk48_prepare, 493 .unprepare = da8xx_usb0_clk48_unprepare, 494 .enable = da8xx_usb0_clk48_enable, 495 .disable = da8xx_usb0_clk48_disable, 496 .is_enabled = da8xx_usb0_clk48_is_enabled, 497 .recalc_rate = da8xx_usb0_clk48_recalc_rate, 498 .round_rate = da8xx_usb0_clk48_round_rate, 499 .set_parent = da8xx_usb0_clk48_set_parent, 500 .get_parent = da8xx_usb0_clk48_get_parent, 501 }; 502 503 static struct da8xx_usb0_clk48 * 504 da8xx_cfgchip_register_usb0_clk48(struct device *dev, 505 struct regmap *regmap) 506 { 507 const char * const parent_names[] = { "usb_refclkin", "pll0_auxclk" }; 508 struct clk *fck_clk; 509 struct da8xx_usb0_clk48 *usb0; 510 struct clk_init_data init; 511 int ret; 512 513 fck_clk = devm_clk_get(dev, "fck"); 514 if (IS_ERR(fck_clk)) { 515 if (PTR_ERR(fck_clk) != -EPROBE_DEFER) 516 dev_err(dev, "Missing fck clock\n"); 517 return ERR_CAST(fck_clk); 518 } 519 520 usb0 = devm_kzalloc(dev, sizeof(*usb0), GFP_KERNEL); 521 if (!usb0) 522 return ERR_PTR(-ENOMEM); 523 524 init.name = "usb0_clk48"; 525 init.ops = &da8xx_usb0_clk48_ops; 526 init.parent_names = parent_names; 527 init.num_parents = 2; 528 529 usb0->hw.init = &init; 530 usb0->fck = fck_clk; 531 usb0->regmap = regmap; 532 533 ret = devm_clk_hw_register(dev, &usb0->hw); 534 if (ret < 0) 535 return ERR_PTR(ret); 536 537 return usb0; 538 } 539 540 /* --- USB 1.1 PHY clock --- */ 541 542 struct da8xx_usb1_clk48 { 543 struct clk_hw hw; 544 struct regmap *regmap; 545 }; 546 547 #define to_da8xx_usb1_clk48(_hw) \ 548 container_of((_hw), struct da8xx_usb1_clk48, hw) 549 550 static int da8xx_usb1_clk48_set_parent(struct clk_hw *hw, u8 index) 551 { 552 struct da8xx_usb1_clk48 *usb1 = to_da8xx_usb1_clk48(hw); 553 554 return regmap_write_bits(usb1->regmap, CFGCHIP(2), 555 CFGCHIP2_USB1PHYCLKMUX, 556 index ? CFGCHIP2_USB1PHYCLKMUX : 0); 557 } 558 559 static u8 da8xx_usb1_clk48_get_parent(struct clk_hw *hw) 560 { 561 struct da8xx_usb1_clk48 *usb1 = to_da8xx_usb1_clk48(hw); 562 unsigned int val; 563 564 regmap_read(usb1->regmap, CFGCHIP(2), &val); 565 566 return (val & CFGCHIP2_USB1PHYCLKMUX) ? 1 : 0; 567 } 568 569 static const struct clk_ops da8xx_usb1_clk48_ops = { 570 .set_parent = da8xx_usb1_clk48_set_parent, 571 .get_parent = da8xx_usb1_clk48_get_parent, 572 }; 573 574 /** 575 * da8xx_cfgchip_register_usb1_clk48 - Register a new USB 1.1 PHY clock 576 * @regmap: The CFGCHIP regmap 577 */ 578 static struct da8xx_usb1_clk48 * 579 da8xx_cfgchip_register_usb1_clk48(struct device *dev, 580 struct regmap *regmap) 581 { 582 const char * const parent_names[] = { "usb0_clk48", "usb_refclkin" }; 583 struct da8xx_usb1_clk48 *usb1; 584 struct clk_init_data init; 585 int ret; 586 587 usb1 = devm_kzalloc(dev, sizeof(*usb1), GFP_KERNEL); 588 if (!usb1) 589 return ERR_PTR(-ENOMEM); 590 591 init.name = "usb1_clk48"; 592 init.ops = &da8xx_usb1_clk48_ops; 593 init.parent_names = parent_names; 594 init.num_parents = 2; 595 596 usb1->hw.init = &init; 597 usb1->regmap = regmap; 598 599 ret = devm_clk_hw_register(dev, &usb1->hw); 600 if (ret < 0) 601 return ERR_PTR(ret); 602 603 return usb1; 604 } 605 606 static int da8xx_cfgchip_register_usb_phy_clk(struct device *dev, 607 struct regmap *regmap) 608 { 609 struct da8xx_usb0_clk48 *usb0; 610 struct da8xx_usb1_clk48 *usb1; 611 struct clk_hw *parent; 612 613 usb0 = da8xx_cfgchip_register_usb0_clk48(dev, regmap); 614 if (IS_ERR(usb0)) 615 return PTR_ERR(usb0); 616 617 /* 618 * All existing boards use pll0_auxclk as the parent and new boards 619 * should use device tree, so hard-coding the value (1) here. 620 */ 621 parent = clk_hw_get_parent_by_index(&usb0->hw, 1); 622 if (parent) 623 clk_set_parent(usb0->hw.clk, parent->clk); 624 else 625 dev_warn(dev, "Failed to find usb0 parent clock\n"); 626 627 usb1 = da8xx_cfgchip_register_usb1_clk48(dev, regmap); 628 if (IS_ERR(usb1)) 629 return PTR_ERR(usb1); 630 631 /* 632 * All existing boards use usb0_clk48 as the parent and new boards 633 * should use device tree, so hard-coding the value (0) here. 634 */ 635 parent = clk_hw_get_parent_by_index(&usb1->hw, 0); 636 if (parent) 637 clk_set_parent(usb1->hw.clk, parent->clk); 638 else 639 dev_warn(dev, "Failed to find usb1 parent clock\n"); 640 641 clk_hw_register_clkdev(&usb0->hw, "usb0_clk48", "da8xx-usb-phy"); 642 clk_hw_register_clkdev(&usb1->hw, "usb1_clk48", "da8xx-usb-phy"); 643 644 return 0; 645 } 646 647 static int of_da8xx_usb_phy_clk_init(struct device *dev, struct regmap *regmap) 648 { 649 struct clk_hw_onecell_data *clk_data; 650 struct da8xx_usb0_clk48 *usb0; 651 struct da8xx_usb1_clk48 *usb1; 652 653 clk_data = devm_kzalloc(dev, struct_size(clk_data, hws, 2), 654 GFP_KERNEL); 655 if (!clk_data) 656 return -ENOMEM; 657 658 clk_data->num = 2; 659 660 usb0 = da8xx_cfgchip_register_usb0_clk48(dev, regmap); 661 if (IS_ERR(usb0)) { 662 if (PTR_ERR(usb0) == -EPROBE_DEFER) 663 return -EPROBE_DEFER; 664 665 dev_warn(dev, "Failed to register usb0_clk48 (%ld)\n", 666 PTR_ERR(usb0)); 667 668 clk_data->hws[0] = ERR_PTR(-ENOENT); 669 } else { 670 clk_data->hws[0] = &usb0->hw; 671 } 672 673 usb1 = da8xx_cfgchip_register_usb1_clk48(dev, regmap); 674 if (IS_ERR(usb1)) { 675 if (PTR_ERR(usb1) == -EPROBE_DEFER) 676 return -EPROBE_DEFER; 677 678 dev_warn(dev, "Failed to register usb1_clk48 (%ld)\n", 679 PTR_ERR(usb1)); 680 681 clk_data->hws[1] = ERR_PTR(-ENOENT); 682 } else { 683 clk_data->hws[1] = &usb1->hw; 684 } 685 686 return devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get, clk_data); 687 } 688 689 /* --- platform device --- */ 690 691 static const struct of_device_id da8xx_cfgchip_of_match[] = { 692 { 693 .compatible = "ti,da830-tbclksync", 694 .data = of_da8xx_tbclksync_init, 695 }, 696 { 697 .compatible = "ti,da830-div4p5ena", 698 .data = of_da8xx_div4p5ena_init, 699 }, 700 { 701 .compatible = "ti,da850-async1-clksrc", 702 .data = of_da850_async1_init, 703 }, 704 { 705 .compatible = "ti,da850-async3-clksrc", 706 .data = of_da850_async3_init, 707 }, 708 { 709 .compatible = "ti,da830-usb-phy-clocks", 710 .data = of_da8xx_usb_phy_clk_init, 711 }, 712 { } 713 }; 714 715 static const struct platform_device_id da8xx_cfgchip_id_table[] = { 716 { 717 .name = "da830-tbclksync", 718 .driver_data = (kernel_ulong_t)da8xx_cfgchip_register_tbclk, 719 }, 720 { 721 .name = "da830-div4p5ena", 722 .driver_data = (kernel_ulong_t)da8xx_cfgchip_register_div4p5, 723 }, 724 { 725 .name = "da850-async1-clksrc", 726 .driver_data = (kernel_ulong_t)da8xx_cfgchip_register_async1, 727 }, 728 { 729 .name = "da850-async3-clksrc", 730 .driver_data = (kernel_ulong_t)da850_cfgchip_register_async3, 731 }, 732 { 733 .name = "da830-usb-phy-clks", 734 .driver_data = (kernel_ulong_t)da8xx_cfgchip_register_usb_phy_clk, 735 }, 736 { } 737 }; 738 739 typedef int (*da8xx_cfgchip_init)(struct device *dev, struct regmap *regmap); 740 741 static int da8xx_cfgchip_probe(struct platform_device *pdev) 742 { 743 struct device *dev = &pdev->dev; 744 struct da8xx_cfgchip_clk_platform_data *pdata = dev->platform_data; 745 const struct of_device_id *of_id; 746 da8xx_cfgchip_init clk_init = NULL; 747 struct regmap *regmap = NULL; 748 749 of_id = of_match_device(da8xx_cfgchip_of_match, dev); 750 if (of_id) { 751 struct device_node *parent; 752 753 clk_init = of_id->data; 754 parent = of_get_parent(dev->of_node); 755 regmap = syscon_node_to_regmap(parent); 756 of_node_put(parent); 757 } else if (pdev->id_entry && pdata) { 758 clk_init = (void *)pdev->id_entry->driver_data; 759 regmap = pdata->cfgchip; 760 } 761 762 if (!clk_init) { 763 dev_err(dev, "unable to find driver data\n"); 764 return -EINVAL; 765 } 766 767 if (IS_ERR_OR_NULL(regmap)) { 768 dev_err(dev, "no regmap for CFGCHIP syscon\n"); 769 return regmap ? PTR_ERR(regmap) : -ENOENT; 770 } 771 772 return clk_init(dev, regmap); 773 } 774 775 static struct platform_driver da8xx_cfgchip_driver = { 776 .probe = da8xx_cfgchip_probe, 777 .driver = { 778 .name = "da8xx-cfgchip-clk", 779 .of_match_table = da8xx_cfgchip_of_match, 780 }, 781 .id_table = da8xx_cfgchip_id_table, 782 }; 783 784 static int __init da8xx_cfgchip_driver_init(void) 785 { 786 return platform_driver_register(&da8xx_cfgchip_driver); 787 } 788 789 /* has to be postcore_initcall because PSC devices depend on the async3 clock */ 790 postcore_initcall(da8xx_cfgchip_driver_init); 791