drivers/clk/rockchip/clk_rk3328.c

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