1 /* 2 * (C) Copyright 2017 Rockchip Electronics Co., Ltd 3 * 4 * SPDX-License-Identifier: GPL-2.0 5 */ 6 7 #include <common.h> 8 #include <bitfield.h> 9 #include <clk-uclass.h> 10 #include <dm.h> 11 #include <errno.h> 12 #include <syscon.h> 13 #include <asm/arch/clock.h> 14 #include <asm/arch/cru_rk3328.h> 15 #include <asm/arch/hardware.h> 16 #include <asm/io.h> 17 #include <dm/lists.h> 18 #include <dt-bindings/clock/rk3328-cru.h> 19 20 DECLARE_GLOBAL_DATA_PTR; 21 22 struct pll_div { 23 u32 refdiv; 24 u32 fbdiv; 25 u32 postdiv1; 26 u32 postdiv2; 27 u32 frac; 28 }; 29 30 #define RATE_TO_DIV(input_rate, output_rate) \ 31 ((input_rate) / (output_rate) - 1); 32 #define DIV_TO_RATE(input_rate, div) ((input_rate) / ((div) + 1)) 33 34 #define PLL_DIVISORS(hz, _refdiv, _postdiv1, _postdiv2) {\ 35 .refdiv = _refdiv,\ 36 .fbdiv = (u32)((u64)hz * _refdiv * _postdiv1 * _postdiv2 / OSC_HZ),\ 37 .postdiv1 = _postdiv1, .postdiv2 = _postdiv2}; 38 39 static const struct pll_div gpll_init_cfg = PLL_DIVISORS(GPLL_HZ, 1, 4, 1); 40 static const struct pll_div cpll_init_cfg = PLL_DIVISORS(CPLL_HZ, 2, 2, 1); 41 42 static const struct pll_div apll_816_cfg = PLL_DIVISORS(816 * MHz, 1, 2, 1); 43 static const struct pll_div apll_600_cfg = PLL_DIVISORS(600 * MHz, 1, 3, 1); 44 45 static const struct pll_div *apll_cfgs[] = { 46 [APLL_816_MHZ] = &apll_816_cfg, 47 [APLL_600_MHZ] = &apll_600_cfg, 48 }; 49 50 enum { 51 /* PLL_CON0 */ 52 PLL_POSTDIV1_SHIFT = 12, 53 PLL_POSTDIV1_MASK = 0x7 << PLL_POSTDIV1_SHIFT, 54 PLL_FBDIV_SHIFT = 0, 55 PLL_FBDIV_MASK = 0xfff, 56 57 /* PLL_CON1 */ 58 PLL_DSMPD_SHIFT = 12, 59 PLL_DSMPD_MASK = 1 << PLL_DSMPD_SHIFT, 60 PLL_INTEGER_MODE = 1, 61 PLL_LOCK_STATUS_SHIFT = 10, 62 PLL_LOCK_STATUS_MASK = 1 << PLL_LOCK_STATUS_SHIFT, 63 PLL_POSTDIV2_SHIFT = 6, 64 PLL_POSTDIV2_MASK = 0x7 << PLL_POSTDIV2_SHIFT, 65 PLL_REFDIV_SHIFT = 0, 66 PLL_REFDIV_MASK = 0x3f, 67 68 /* PLL_CON2 */ 69 PLL_FRACDIV_SHIFT = 0, 70 PLL_FRACDIV_MASK = 0xffffff, 71 72 /* MODE_CON */ 73 APLL_MODE_SHIFT = 0, 74 NPLL_MODE_SHIFT = 1, 75 DPLL_MODE_SHIFT = 4, 76 CPLL_MODE_SHIFT = 8, 77 GPLL_MODE_SHIFT = 12, 78 PLL_MODE_SLOW = 0, 79 PLL_MODE_NORM, 80 81 /* CLKSEL_CON0 */ 82 CLK_CORE_PLL_SEL_APLL = 0, 83 CLK_CORE_PLL_SEL_GPLL, 84 CLK_CORE_PLL_SEL_DPLL, 85 CLK_CORE_PLL_SEL_NPLL, 86 CLK_CORE_PLL_SEL_SHIFT = 6, 87 CLK_CORE_PLL_SEL_MASK = 3 << CLK_CORE_PLL_SEL_SHIFT, 88 CLK_CORE_DIV_SHIFT = 0, 89 CLK_CORE_DIV_MASK = 0x1f, 90 91 /* CLKSEL_CON1 */ 92 ACLKM_CORE_DIV_SHIFT = 4, 93 ACLKM_CORE_DIV_MASK = 0x7 << ACLKM_CORE_DIV_SHIFT, 94 PCLK_DBG_DIV_SHIFT = 0, 95 PCLK_DBG_DIV_MASK = 0xF << PCLK_DBG_DIV_SHIFT, 96 97 /* CLKSEL_CON28 */ 98 ACLK_PERIHP_PLL_SEL_CPLL = 0, 99 ACLK_PERIHP_PLL_SEL_GPLL, 100 ACLK_PERIHP_PLL_SEL_HDMIPHY, 101 ACLK_PERIHP_PLL_SEL_SHIFT = 6, 102 ACLK_PERIHP_PLL_SEL_MASK = 3 << ACLK_PERIHP_PLL_SEL_SHIFT, 103 ACLK_PERIHP_DIV_CON_SHIFT = 0, 104 ACLK_PERIHP_DIV_CON_MASK = 0x1f, 105 106 /* CLKSEL_CON29 */ 107 PCLK_PERIHP_DIV_CON_SHIFT = 4, 108 PCLK_PERIHP_DIV_CON_MASK = 0x7 << PCLK_PERIHP_DIV_CON_SHIFT, 109 HCLK_PERIHP_DIV_CON_SHIFT = 0, 110 HCLK_PERIHP_DIV_CON_MASK = 3 << HCLK_PERIHP_DIV_CON_SHIFT, 111 112 /* CLKSEL_CON22 */ 113 CLK_TSADC_DIV_CON_SHIFT = 0, 114 CLK_TSADC_DIV_CON_MASK = 0x3ff, 115 116 /* CLKSEL_CON23 */ 117 CLK_SARADC_DIV_CON_SHIFT = 0, 118 CLK_SARADC_DIV_CON_MASK = GENMASK(9, 0), 119 CLK_SARADC_DIV_CON_WIDTH = 10, 120 121 /* CLKSEL_CON24 */ 122 CLK_PWM_PLL_SEL_CPLL = 0, 123 CLK_PWM_PLL_SEL_GPLL, 124 CLK_PWM_PLL_SEL_SHIFT = 15, 125 CLK_PWM_PLL_SEL_MASK = 1 << CLK_PWM_PLL_SEL_SHIFT, 126 CLK_PWM_DIV_CON_SHIFT = 8, 127 CLK_PWM_DIV_CON_MASK = 0x7f << CLK_PWM_DIV_CON_SHIFT, 128 129 CLK_SPI_PLL_SEL_CPLL = 0, 130 CLK_SPI_PLL_SEL_GPLL, 131 CLK_SPI_PLL_SEL_SHIFT = 7, 132 CLK_SPI_PLL_SEL_MASK = 1 << CLK_SPI_PLL_SEL_SHIFT, 133 CLK_SPI_DIV_CON_SHIFT = 0, 134 CLK_SPI_DIV_CON_MASK = 0x7f << CLK_SPI_DIV_CON_SHIFT, 135 136 /* CLKSEL_CON30 */ 137 CLK_SDMMC_PLL_SEL_CPLL = 0, 138 CLK_SDMMC_PLL_SEL_GPLL, 139 CLK_SDMMC_PLL_SEL_24M, 140 CLK_SDMMC_PLL_SEL_USBPHY, 141 CLK_SDMMC_PLL_SHIFT = 8, 142 CLK_SDMMC_PLL_MASK = 0x3 << CLK_SDMMC_PLL_SHIFT, 143 CLK_SDMMC_DIV_CON_SHIFT = 0, 144 CLK_SDMMC_DIV_CON_MASK = 0xff << CLK_SDMMC_DIV_CON_SHIFT, 145 146 /* CLKSEL_CON32 */ 147 CLK_EMMC_PLL_SEL_CPLL = 0, 148 CLK_EMMC_PLL_SEL_GPLL, 149 CLK_EMMC_PLL_SEL_24M, 150 CLK_EMMC_PLL_SEL_USBPHY, 151 CLK_EMMC_PLL_SHIFT = 8, 152 CLK_EMMC_PLL_MASK = 0x3 << CLK_EMMC_PLL_SHIFT, 153 CLK_EMMC_DIV_CON_SHIFT = 0, 154 CLK_EMMC_DIV_CON_MASK = 0xff << CLK_EMMC_DIV_CON_SHIFT, 155 156 /* CLKSEL_CON34 */ 157 CLK_I2C_PLL_SEL_CPLL = 0, 158 CLK_I2C_PLL_SEL_GPLL, 159 CLK_I2C_DIV_CON_MASK = 0x7f, 160 CLK_I2C_PLL_SEL_MASK = 1, 161 CLK_I2C1_PLL_SEL_SHIFT = 15, 162 CLK_I2C1_DIV_CON_SHIFT = 8, 163 CLK_I2C0_PLL_SEL_SHIFT = 7, 164 CLK_I2C0_DIV_CON_SHIFT = 0, 165 166 /* CLKSEL_CON35 */ 167 CLK_I2C3_PLL_SEL_SHIFT = 15, 168 CLK_I2C3_DIV_CON_SHIFT = 8, 169 CLK_I2C2_PLL_SEL_SHIFT = 7, 170 CLK_I2C2_DIV_CON_SHIFT = 0, 171 }; 172 173 #define VCO_MAX_KHZ (3200 * (MHz / KHz)) 174 #define VCO_MIN_KHZ (800 * (MHz / KHz)) 175 #define OUTPUT_MAX_KHZ (3200 * (MHz / KHz)) 176 #define OUTPUT_MIN_KHZ (16 * (MHz / KHz)) 177 178 /* 179 * the div restructions of pll in integer mode, these are defined in 180 * * CRU_*PLL_CON0 or PMUCRU_*PLL_CON0 181 */ 182 #define PLL_DIV_MIN 16 183 #define PLL_DIV_MAX 3200 184 185 /* 186 * How to calculate the PLL(from TRM V0.3 Part 1 Page 63): 187 * Formulas also embedded within the Fractional PLL Verilog model: 188 * If DSMPD = 1 (DSM is disabled, "integer mode") 189 * FOUTVCO = FREF / REFDIV * FBDIV 190 * FOUTPOSTDIV = FOUTVCO / POSTDIV1 / POSTDIV2 191 * Where: 192 * FOUTVCO = Fractional PLL non-divided output frequency 193 * FOUTPOSTDIV = Fractional PLL divided output frequency 194 * (output of second post divider) 195 * FREF = Fractional PLL input reference frequency, (the OSC_HZ 24MHz input) 196 * REFDIV = Fractional PLL input reference clock divider 197 * FBDIV = Integer value programmed into feedback divide 198 * 199 */ 200 static void rkclk_set_pll(struct rk3328_cru *cru, enum rk_clk_id clk_id, 201 const struct pll_div *div) 202 { 203 u32 *pll_con; 204 u32 mode_shift, mode_mask; 205 206 pll_con = NULL; 207 mode_shift = 0; 208 switch (clk_id) { 209 case CLK_ARM: 210 pll_con = cru->apll_con; 211 mode_shift = APLL_MODE_SHIFT; 212 break; 213 case CLK_DDR: 214 pll_con = cru->dpll_con; 215 mode_shift = DPLL_MODE_SHIFT; 216 break; 217 case CLK_CODEC: 218 pll_con = cru->cpll_con; 219 mode_shift = CPLL_MODE_SHIFT; 220 break; 221 case CLK_GENERAL: 222 pll_con = cru->gpll_con; 223 mode_shift = GPLL_MODE_SHIFT; 224 break; 225 case CLK_NEW: 226 pll_con = cru->npll_con; 227 mode_shift = NPLL_MODE_SHIFT; 228 break; 229 default: 230 break; 231 } 232 mode_mask = 1 << mode_shift; 233 234 /* All 8 PLLs have same VCO and output frequency range restrictions. */ 235 u32 vco_khz = OSC_HZ / 1000 * div->fbdiv / div->refdiv; 236 u32 output_khz = vco_khz / div->postdiv1 / div->postdiv2; 237 238 debug("PLL at %p: fbdiv=%d, refdiv=%d, postdiv1=%d, \ 239 postdiv2=%d, vco=%u khz, output=%u khz\n", 240 pll_con, div->fbdiv, div->refdiv, div->postdiv1, 241 div->postdiv2, vco_khz, output_khz); 242 assert(vco_khz >= VCO_MIN_KHZ && vco_khz <= VCO_MAX_KHZ && 243 output_khz >= OUTPUT_MIN_KHZ && output_khz <= OUTPUT_MAX_KHZ && 244 div->fbdiv >= PLL_DIV_MIN && div->fbdiv <= PLL_DIV_MAX); 245 246 /* 247 * When power on or changing PLL setting, 248 * we must force PLL into slow mode to ensure output stable clock. 249 */ 250 rk_clrsetreg(&cru->mode_con, mode_mask, PLL_MODE_SLOW << mode_shift); 251 252 /* use integer mode */ 253 rk_clrsetreg(&pll_con[1], PLL_DSMPD_MASK, 254 PLL_INTEGER_MODE << PLL_DSMPD_SHIFT); 255 256 rk_clrsetreg(&pll_con[0], 257 PLL_FBDIV_MASK | PLL_POSTDIV1_MASK, 258 (div->fbdiv << PLL_FBDIV_SHIFT) | 259 (div->postdiv1 << PLL_POSTDIV1_SHIFT)); 260 rk_clrsetreg(&pll_con[1], 261 PLL_POSTDIV2_MASK | PLL_REFDIV_MASK, 262 (div->postdiv2 << PLL_POSTDIV2_SHIFT) | 263 (div->refdiv << PLL_REFDIV_SHIFT)); 264 265 /* waiting for pll lock */ 266 while (!(readl(&pll_con[1]) & (1 << PLL_LOCK_STATUS_SHIFT))) 267 udelay(1); 268 269 /* pll enter normal mode */ 270 rk_clrsetreg(&cru->mode_con, mode_mask, PLL_MODE_NORM << mode_shift); 271 } 272 273 static void rkclk_init(struct rk3328_cru *cru) 274 { 275 u32 aclk_div; 276 u32 hclk_div; 277 u32 pclk_div; 278 279 /* configure gpll cpll */ 280 rkclk_set_pll(cru, CLK_GENERAL, &gpll_init_cfg); 281 rkclk_set_pll(cru, CLK_CODEC, &cpll_init_cfg); 282 283 /* configure perihp aclk, hclk, pclk */ 284 aclk_div = GPLL_HZ / PERIHP_ACLK_HZ - 1; 285 hclk_div = PERIHP_ACLK_HZ / PERIHP_HCLK_HZ - 1; 286 pclk_div = PERIHP_ACLK_HZ / PERIHP_PCLK_HZ - 1; 287 288 rk_clrsetreg(&cru->clksel_con[28], 289 ACLK_PERIHP_PLL_SEL_MASK | ACLK_PERIHP_DIV_CON_MASK, 290 ACLK_PERIHP_PLL_SEL_GPLL << ACLK_PERIHP_PLL_SEL_SHIFT | 291 aclk_div << ACLK_PERIHP_DIV_CON_SHIFT); 292 rk_clrsetreg(&cru->clksel_con[29], 293 PCLK_PERIHP_DIV_CON_MASK | HCLK_PERIHP_DIV_CON_MASK, 294 pclk_div << PCLK_PERIHP_DIV_CON_SHIFT | 295 hclk_div << HCLK_PERIHP_DIV_CON_SHIFT); 296 } 297 298 void rk3328_configure_cpu(struct rk3328_cru *cru, 299 enum apll_frequencies apll_freq) 300 { 301 u32 clk_core_div; 302 u32 aclkm_div; 303 u32 pclk_dbg_div; 304 305 rkclk_set_pll(cru, CLK_ARM, apll_cfgs[apll_freq]); 306 307 clk_core_div = APLL_HZ / CLK_CORE_HZ - 1; 308 aclkm_div = APLL_HZ / ACLKM_CORE_HZ / (clk_core_div + 1) - 1; 309 pclk_dbg_div = APLL_HZ / PCLK_DBG_HZ / (clk_core_div + 1) - 1; 310 311 rk_clrsetreg(&cru->clksel_con[0], 312 CLK_CORE_PLL_SEL_MASK | CLK_CORE_DIV_MASK, 313 CLK_CORE_PLL_SEL_APLL << CLK_CORE_PLL_SEL_SHIFT | 314 clk_core_div << CLK_CORE_DIV_SHIFT); 315 316 rk_clrsetreg(&cru->clksel_con[1], 317 PCLK_DBG_DIV_MASK | ACLKM_CORE_DIV_MASK, 318 pclk_dbg_div << PCLK_DBG_DIV_SHIFT | 319 aclkm_div << ACLKM_CORE_DIV_SHIFT); 320 } 321 322 323 static ulong rk3328_i2c_get_clk(struct rk3328_cru *cru, ulong clk_id) 324 { 325 u32 div, con; 326 327 switch (clk_id) { 328 case SCLK_I2C0: 329 con = readl(&cru->clksel_con[34]); 330 div = con >> CLK_I2C0_DIV_CON_SHIFT & CLK_I2C_DIV_CON_MASK; 331 break; 332 case SCLK_I2C1: 333 con = readl(&cru->clksel_con[34]); 334 div = con >> CLK_I2C1_DIV_CON_SHIFT & CLK_I2C_DIV_CON_MASK; 335 break; 336 case SCLK_I2C2: 337 con = readl(&cru->clksel_con[35]); 338 div = con >> CLK_I2C2_DIV_CON_SHIFT & CLK_I2C_DIV_CON_MASK; 339 break; 340 case SCLK_I2C3: 341 con = readl(&cru->clksel_con[35]); 342 div = con >> CLK_I2C3_DIV_CON_SHIFT & CLK_I2C_DIV_CON_MASK; 343 break; 344 default: 345 printf("do not support this i2c bus\n"); 346 return -EINVAL; 347 } 348 349 return DIV_TO_RATE(GPLL_HZ, div); 350 } 351 352 static ulong rk3328_i2c_set_clk(struct rk3328_cru *cru, ulong clk_id, uint hz) 353 { 354 int src_clk_div; 355 356 src_clk_div = GPLL_HZ / hz; 357 assert(src_clk_div - 1 < 127); 358 359 switch (clk_id) { 360 case SCLK_I2C0: 361 rk_clrsetreg(&cru->clksel_con[34], 362 CLK_I2C_DIV_CON_MASK << CLK_I2C0_DIV_CON_SHIFT | 363 CLK_I2C_PLL_SEL_MASK << CLK_I2C0_PLL_SEL_SHIFT, 364 (src_clk_div - 1) << CLK_I2C0_DIV_CON_SHIFT | 365 CLK_I2C_PLL_SEL_GPLL << CLK_I2C0_PLL_SEL_SHIFT); 366 break; 367 case SCLK_I2C1: 368 rk_clrsetreg(&cru->clksel_con[34], 369 CLK_I2C_DIV_CON_MASK << CLK_I2C1_DIV_CON_SHIFT | 370 CLK_I2C_PLL_SEL_MASK << CLK_I2C1_PLL_SEL_SHIFT, 371 (src_clk_div - 1) << CLK_I2C1_DIV_CON_SHIFT | 372 CLK_I2C_PLL_SEL_GPLL << CLK_I2C1_PLL_SEL_SHIFT); 373 break; 374 case SCLK_I2C2: 375 rk_clrsetreg(&cru->clksel_con[35], 376 CLK_I2C_DIV_CON_MASK << CLK_I2C2_DIV_CON_SHIFT | 377 CLK_I2C_PLL_SEL_MASK << CLK_I2C2_PLL_SEL_SHIFT, 378 (src_clk_div - 1) << CLK_I2C2_DIV_CON_SHIFT | 379 CLK_I2C_PLL_SEL_GPLL << CLK_I2C2_PLL_SEL_SHIFT); 380 break; 381 case SCLK_I2C3: 382 rk_clrsetreg(&cru->clksel_con[35], 383 CLK_I2C_DIV_CON_MASK << CLK_I2C3_DIV_CON_SHIFT | 384 CLK_I2C_PLL_SEL_MASK << CLK_I2C3_PLL_SEL_SHIFT, 385 (src_clk_div - 1) << CLK_I2C3_DIV_CON_SHIFT | 386 CLK_I2C_PLL_SEL_GPLL << CLK_I2C3_PLL_SEL_SHIFT); 387 break; 388 default: 389 printf("do not support this i2c bus\n"); 390 return -EINVAL; 391 } 392 393 return DIV_TO_RATE(GPLL_HZ, src_clk_div); 394 } 395 396 static ulong rk3328_mmc_get_clk(struct rk3328_cru *cru, uint clk_id) 397 { 398 u32 div, con, con_id; 399 400 switch (clk_id) { 401 case HCLK_SDMMC: 402 case SCLK_SDMMC: 403 con_id = 30; 404 break; 405 case HCLK_EMMC: 406 case SCLK_EMMC: 407 con_id = 32; 408 break; 409 default: 410 return -EINVAL; 411 } 412 con = readl(&cru->clksel_con[con_id]); 413 div = (con & CLK_EMMC_DIV_CON_MASK) >> CLK_EMMC_DIV_CON_SHIFT; 414 415 if ((con & CLK_EMMC_PLL_MASK) >> CLK_EMMC_PLL_SHIFT 416 == CLK_EMMC_PLL_SEL_24M) 417 return DIV_TO_RATE(OSC_HZ, div) / 2; 418 else 419 return DIV_TO_RATE(GPLL_HZ, div) / 2; 420 } 421 422 static ulong rk3328_mmc_set_clk(struct rk3328_cru *cru, 423 ulong clk_id, ulong set_rate) 424 { 425 int src_clk_div; 426 u32 con_id; 427 428 switch (clk_id) { 429 case HCLK_SDMMC: 430 case SCLK_SDMMC: 431 con_id = 30; 432 break; 433 case HCLK_EMMC: 434 case SCLK_EMMC: 435 con_id = 32; 436 break; 437 default: 438 return -EINVAL; 439 } 440 /* Select clk_sdmmc/emmc source from GPLL by default */ 441 /* mmc clock defaulg div 2 internal, need provide double in cru */ 442 src_clk_div = DIV_ROUND_UP(GPLL_HZ / 2, set_rate); 443 444 if (src_clk_div > 127) { 445 /* use 24MHz source for 400KHz clock */ 446 src_clk_div = DIV_ROUND_UP(OSC_HZ / 2, set_rate); 447 rk_clrsetreg(&cru->clksel_con[con_id], 448 CLK_EMMC_PLL_MASK | CLK_EMMC_DIV_CON_MASK, 449 CLK_EMMC_PLL_SEL_24M << CLK_EMMC_PLL_SHIFT | 450 (src_clk_div - 1) << CLK_EMMC_DIV_CON_SHIFT); 451 } else { 452 rk_clrsetreg(&cru->clksel_con[con_id], 453 CLK_EMMC_PLL_MASK | CLK_EMMC_DIV_CON_MASK, 454 CLK_EMMC_PLL_SEL_GPLL << CLK_EMMC_PLL_SHIFT | 455 (src_clk_div - 1) << CLK_EMMC_DIV_CON_SHIFT); 456 } 457 458 return rk3328_mmc_get_clk(cru, clk_id); 459 } 460 461 static ulong rk3328_pwm_get_clk(struct rk3328_cru *cru) 462 { 463 u32 div, con; 464 465 con = readl(&cru->clksel_con[24]); 466 div = (con & CLK_PWM_DIV_CON_MASK) >> CLK_PWM_DIV_CON_SHIFT; 467 468 return DIV_TO_RATE(GPLL_HZ, div); 469 } 470 471 static ulong rk3328_pwm_set_clk(struct rk3328_cru *cru, uint hz) 472 { 473 u32 div = GPLL_HZ / hz; 474 475 rk_clrsetreg(&cru->clksel_con[24], 476 CLK_PWM_PLL_SEL_MASK | CLK_PWM_DIV_CON_MASK, 477 CLK_PWM_PLL_SEL_GPLL << CLK_PWM_PLL_SEL_SHIFT | 478 (div - 1) << CLK_PWM_DIV_CON_SHIFT); 479 480 return DIV_TO_RATE(GPLL_HZ, div); 481 } 482 483 static ulong rk3328_saradc_get_clk(struct rk3328_cru *cru) 484 { 485 u32 div, val; 486 487 val = readl(&cru->clksel_con[23]); 488 div = bitfield_extract(val, CLK_SARADC_DIV_CON_SHIFT, 489 CLK_SARADC_DIV_CON_WIDTH); 490 491 return DIV_TO_RATE(OSC_HZ, div); 492 } 493 494 static ulong rk3328_saradc_set_clk(struct rk3328_cru *cru, uint hz) 495 { 496 int src_clk_div; 497 498 src_clk_div = DIV_ROUND_UP(OSC_HZ, hz) - 1; 499 assert(src_clk_div < 128); 500 501 rk_clrsetreg(&cru->clksel_con[23], 502 CLK_SARADC_DIV_CON_MASK, 503 src_clk_div << CLK_SARADC_DIV_CON_SHIFT); 504 505 return rk3328_saradc_get_clk(cru); 506 } 507 508 static ulong rk3328_clk_get_rate(struct clk *clk) 509 { 510 struct rk3328_clk_priv *priv = dev_get_priv(clk->dev); 511 ulong rate = 0; 512 513 switch (clk->id) { 514 case 0 ... 29: 515 return 0; 516 case HCLK_SDMMC: 517 case HCLK_EMMC: 518 case SCLK_SDMMC: 519 case SCLK_EMMC: 520 rate = rk3328_mmc_get_clk(priv->cru, clk->id); 521 break; 522 case SCLK_I2C0: 523 case SCLK_I2C1: 524 case SCLK_I2C2: 525 case SCLK_I2C3: 526 rate = rk3328_i2c_get_clk(priv->cru, clk->id); 527 break; 528 case SCLK_PWM: 529 rate = rk3328_pwm_get_clk(priv->cru); 530 break; 531 case SCLK_SARADC: 532 rate = rk3328_saradc_get_clk(priv->cru); 533 break; 534 default: 535 return -ENOENT; 536 } 537 538 return rate; 539 } 540 541 static ulong rk3328_clk_set_rate(struct clk *clk, ulong rate) 542 { 543 struct rk3328_clk_priv *priv = dev_get_priv(clk->dev); 544 ulong ret = 0; 545 546 switch (clk->id) { 547 case 0 ... 29: 548 return 0; 549 case HCLK_SDMMC: 550 case HCLK_EMMC: 551 case SCLK_SDMMC: 552 case SCLK_EMMC: 553 ret = rk3328_mmc_set_clk(priv->cru, clk->id, rate); 554 break; 555 case SCLK_I2C0: 556 case SCLK_I2C1: 557 case SCLK_I2C2: 558 case SCLK_I2C3: 559 ret = rk3328_i2c_set_clk(priv->cru, clk->id, rate); 560 break; 561 case SCLK_PWM: 562 ret = rk3328_pwm_set_clk(priv->cru, rate); 563 break; 564 case SCLK_SARADC: 565 ret = rk3328_saradc_set_clk(priv->cru, rate); 566 break; 567 default: 568 return -ENOENT; 569 } 570 571 return ret; 572 } 573 574 static struct clk_ops rk3328_clk_ops = { 575 .get_rate = rk3328_clk_get_rate, 576 .set_rate = rk3328_clk_set_rate, 577 }; 578 579 static int rk3328_clk_probe(struct udevice *dev) 580 { 581 struct rk3328_clk_priv *priv = dev_get_priv(dev); 582 583 rkclk_init(priv->cru); 584 585 return 0; 586 } 587 588 static int rk3328_clk_ofdata_to_platdata(struct udevice *dev) 589 { 590 struct rk3328_clk_priv *priv = dev_get_priv(dev); 591 592 priv->cru = (struct rk3328_cru *)devfdt_get_addr(dev); 593 594 return 0; 595 } 596 597 static int rk3328_clk_bind(struct udevice *dev) 598 { 599 int ret; 600 601 /* The reset driver does not have a device node, so bind it here */ 602 ret = device_bind_driver(gd->dm_root, "rk3328_sysreset", "reset", &dev); 603 if (ret) 604 printf("Warning: No RK3328 reset driver: ret=%d\n", ret); 605 606 return ret; 607 } 608 609 static const struct udevice_id rk3328_clk_ids[] = { 610 { .compatible = "rockchip,rk3328-cru" }, 611 { } 612 }; 613 614 U_BOOT_DRIVER(rockchip_rk3328_cru) = { 615 .name = "rockchip_rk3328_cru", 616 .id = UCLASS_CLK, 617 .of_match = rk3328_clk_ids, 618 .priv_auto_alloc_size = sizeof(struct rk3328_clk_priv), 619 .ofdata_to_platdata = rk3328_clk_ofdata_to_platdata, 620 .ops = &rk3328_clk_ops, 621 .bind = rk3328_clk_bind, 622 .probe = rk3328_clk_probe, 623 }; 624