drivers/clk/rockchip/clk_rk3328.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * (C) Copyright 2017 Rockchip Electronics Co., Ltd
   4  */
   5
   6 #include <common.h>
   7 #include <bitfield.h>
   8 #include <clk-uclass.h>
   9 #include <dm.h>
  10 #include <errno.h>
  11 #include <log.h>
  12 #include <malloc.h>
  13 #include <syscon.h>
  14 #include <asm/arch-rockchip/clock.h>
  15 #include <asm/arch-rockchip/cru_rk3328.h>
  16 #include <asm/arch-rockchip/hardware.h>
  17 #include <asm/arch-rockchip/grf_rk3328.h>
  18 #include <asm/io.h>
  19 #include <dm/lists.h>
  20 #include <dt-bindings/clock/rk3328-cru.h>
  21 #include <linux/delay.h>
  22
  23 struct pll_div {
  24         u32 refdiv;
  25         u32 fbdiv;
  26         u32 postdiv1;
  27         u32 postdiv2;
  28         u32 frac;
  29 };
  30
  31 #define RATE_TO_DIV(input_rate, output_rate) \
  32         ((input_rate) / (output_rate) - 1);
  33 #define DIV_TO_RATE(input_rate, div)    ((input_rate) / ((div) + 1))
  34
  35 #define PLL_DIVISORS(hz, _refdiv, _postdiv1, _postdiv2) {\
  36         .refdiv = _refdiv,\
  37         .fbdiv = (u32)((u64)hz * _refdiv * _postdiv1 * _postdiv2 / OSC_HZ),\
  38         .postdiv1 = _postdiv1, .postdiv2 = _postdiv2};
  39
  40 static const struct pll_div gpll_init_cfg = PLL_DIVISORS(GPLL_HZ, 1, 4, 1);
  41 static const struct pll_div cpll_init_cfg = PLL_DIVISORS(CPLL_HZ, 2, 2, 1);
  42
  43 static const struct pll_div apll_816_cfg = PLL_DIVISORS(816 * MHz, 1, 2, 1);
  44 static const struct pll_div apll_600_cfg = PLL_DIVISORS(600 * MHz, 1, 3, 1);
  45
  46 static const struct pll_div *apll_cfgs[] = {
  47         [APLL_816_MHZ] = &apll_816_cfg,
  48         [APLL_600_MHZ] = &apll_600_cfg,
  49 };
  50
  51 enum {
  52         /* PLL_CON0 */
  53         PLL_POSTDIV1_SHIFT              = 12,
  54         PLL_POSTDIV1_MASK               = 0x7 << PLL_POSTDIV1_SHIFT,
  55         PLL_FBDIV_SHIFT                 = 0,
  56         PLL_FBDIV_MASK                  = 0xfff,
  57
  58         /* PLL_CON1 */
  59         PLL_DSMPD_SHIFT                 = 12,
  60         PLL_DSMPD_MASK                  = 1 << PLL_DSMPD_SHIFT,
  61         PLL_INTEGER_MODE                = 1,
  62         PLL_LOCK_STATUS_SHIFT           = 10,
  63         PLL_LOCK_STATUS_MASK            = 1 << PLL_LOCK_STATUS_SHIFT,
  64         PLL_POSTDIV2_SHIFT              = 6,
  65         PLL_POSTDIV2_MASK               = 0x7 << PLL_POSTDIV2_SHIFT,
  66         PLL_REFDIV_SHIFT                = 0,
  67         PLL_REFDIV_MASK                 = 0x3f,
  68
  69         /* PLL_CON2 */
  70         PLL_FRACDIV_SHIFT               = 0,
  71         PLL_FRACDIV_MASK                = 0xffffff,
  72
  73         /* MODE_CON */
  74         APLL_MODE_SHIFT                 = 0,
  75         NPLL_MODE_SHIFT                 = 1,
  76         DPLL_MODE_SHIFT                 = 4,
  77         CPLL_MODE_SHIFT                 = 8,
  78         GPLL_MODE_SHIFT                 = 12,
  79         PLL_MODE_SLOW                   = 0,
  80         PLL_MODE_NORM,
  81
  82         /* CLKSEL_CON0 */
  83         CLK_CORE_PLL_SEL_APLL           = 0,
  84         CLK_CORE_PLL_SEL_GPLL,
  85         CLK_CORE_PLL_SEL_DPLL,
  86         CLK_CORE_PLL_SEL_NPLL,
  87         CLK_CORE_PLL_SEL_SHIFT          = 6,
  88         CLK_CORE_PLL_SEL_MASK           = 3 << CLK_CORE_PLL_SEL_SHIFT,
  89         CLK_CORE_DIV_SHIFT              = 0,
  90         CLK_CORE_DIV_MASK               = 0x1f,
  91
  92         /* CLKSEL_CON1 */
  93         ACLKM_CORE_DIV_SHIFT            = 4,
  94         ACLKM_CORE_DIV_MASK             = 0x7 << ACLKM_CORE_DIV_SHIFT,
  95         PCLK_DBG_DIV_SHIFT              = 0,
  96         PCLK_DBG_DIV_MASK               = 0xF << PCLK_DBG_DIV_SHIFT,
  97
  98         /* CLKSEL_CON27 */
  99         GMAC2IO_PLL_SEL_SHIFT           = 7,
 100         GMAC2IO_PLL_SEL_MASK            = 1 << GMAC2IO_PLL_SEL_SHIFT,
 101         GMAC2IO_PLL_SEL_CPLL            = 0,
 102         GMAC2IO_PLL_SEL_GPLL            = 1,
 103         GMAC2IO_CLK_DIV_MASK            = 0x1f,
 104         GMAC2IO_CLK_DIV_SHIFT           = 0,
 105
 106         /* CLKSEL_CON28 */
 107         ACLK_PERIHP_PLL_SEL_CPLL        = 0,
 108         ACLK_PERIHP_PLL_SEL_GPLL,
 109         ACLK_PERIHP_PLL_SEL_HDMIPHY,
 110         ACLK_PERIHP_PLL_SEL_SHIFT       = 6,
 111         ACLK_PERIHP_PLL_SEL_MASK        = 3 << ACLK_PERIHP_PLL_SEL_SHIFT,
 112         ACLK_PERIHP_DIV_CON_SHIFT       = 0,
 113         ACLK_PERIHP_DIV_CON_MASK        = 0x1f,
 114
 115         /* CLKSEL_CON29 */
 116         PCLK_PERIHP_DIV_CON_SHIFT       = 4,
 117         PCLK_PERIHP_DIV_CON_MASK        = 0x7 << PCLK_PERIHP_DIV_CON_SHIFT,
 118         HCLK_PERIHP_DIV_CON_SHIFT       = 0,
 119         HCLK_PERIHP_DIV_CON_MASK        = 3 << HCLK_PERIHP_DIV_CON_SHIFT,
 120
 121         /* CLKSEL_CON22 */
 122         CLK_TSADC_DIV_CON_SHIFT         = 0,
 123         CLK_TSADC_DIV_CON_MASK          = 0x3ff,
 124
 125         /* CLKSEL_CON23 */
 126         CLK_SARADC_DIV_CON_SHIFT        = 0,
 127         CLK_SARADC_DIV_CON_MASK         = GENMASK(9, 0),
 128         CLK_SARADC_DIV_CON_WIDTH        = 10,
 129
 130         /* CLKSEL_CON24 */
 131         CLK_PWM_PLL_SEL_CPLL            = 0,
 132         CLK_PWM_PLL_SEL_GPLL,
 133         CLK_PWM_PLL_SEL_SHIFT           = 15,
 134         CLK_PWM_PLL_SEL_MASK            = 1 << CLK_PWM_PLL_SEL_SHIFT,
 135         CLK_PWM_DIV_CON_SHIFT           = 8,
 136         CLK_PWM_DIV_CON_MASK            = 0x7f << CLK_PWM_DIV_CON_SHIFT,
 137
 138         CLK_SPI_PLL_SEL_CPLL            = 0,
 139         CLK_SPI_PLL_SEL_GPLL,
 140         CLK_SPI_PLL_SEL_SHIFT           = 7,
 141         CLK_SPI_PLL_SEL_MASK            = 1 << CLK_SPI_PLL_SEL_SHIFT,
 142         CLK_SPI_DIV_CON_SHIFT           = 0,
 143         CLK_SPI_DIV_CON_MASK            = 0x7f << CLK_SPI_DIV_CON_SHIFT,
 144
 145         /* CLKSEL_CON30 */
 146         CLK_SDMMC_PLL_SEL_CPLL          = 0,
 147         CLK_SDMMC_PLL_SEL_GPLL,
 148         CLK_SDMMC_PLL_SEL_24M,
 149         CLK_SDMMC_PLL_SEL_USBPHY,
 150         CLK_SDMMC_PLL_SHIFT             = 8,
 151         CLK_SDMMC_PLL_MASK              = 0x3 << CLK_SDMMC_PLL_SHIFT,
 152         CLK_SDMMC_DIV_CON_SHIFT          = 0,
 153         CLK_SDMMC_DIV_CON_MASK           = 0xff << CLK_SDMMC_DIV_CON_SHIFT,
 154
 155         /* CLKSEL_CON32 */
 156         CLK_EMMC_PLL_SEL_CPLL           = 0,
 157         CLK_EMMC_PLL_SEL_GPLL,
 158         CLK_EMMC_PLL_SEL_24M,
 159         CLK_EMMC_PLL_SEL_USBPHY,
 160         CLK_EMMC_PLL_SHIFT              = 8,
 161         CLK_EMMC_PLL_MASK               = 0x3 << CLK_EMMC_PLL_SHIFT,
 162         CLK_EMMC_DIV_CON_SHIFT          = 0,
 163         CLK_EMMC_DIV_CON_MASK           = 0xff << CLK_EMMC_DIV_CON_SHIFT,
 164
 165         /* CLKSEL_CON34 */
 166         CLK_I2C_PLL_SEL_CPLL            = 0,
 167         CLK_I2C_PLL_SEL_GPLL,
 168         CLK_I2C_DIV_CON_MASK            = 0x7f,
 169         CLK_I2C_PLL_SEL_MASK            = 1,
 170         CLK_I2C1_PLL_SEL_SHIFT          = 15,
 171         CLK_I2C1_DIV_CON_SHIFT          = 8,
 172         CLK_I2C0_PLL_SEL_SHIFT          = 7,
 173         CLK_I2C0_DIV_CON_SHIFT          = 0,
 174
 175         /* CLKSEL_CON35 */
 176         CLK_I2C3_PLL_SEL_SHIFT          = 15,
 177         CLK_I2C3_DIV_CON_SHIFT          = 8,
 178         CLK_I2C2_PLL_SEL_SHIFT          = 7,
 179         CLK_I2C2_DIV_CON_SHIFT          = 0,
 180 };
 181
 182 #define VCO_MAX_KHZ     (3200 * (MHz / KHz))
 183 #define VCO_MIN_KHZ     (800 * (MHz / KHz))
 184 #define OUTPUT_MAX_KHZ  (3200 * (MHz / KHz))
 185 #define OUTPUT_MIN_KHZ  (16 * (MHz / KHz))
 186
 187 /*
 188  *  the div restructions of pll in integer mode, these are defined in
 189  *  * CRU_*PLL_CON0 or PMUCRU_*PLL_CON0
 190  */
 191 #define PLL_DIV_MIN     16
 192 #define PLL_DIV_MAX     3200
 193
 194 /*
 195  * How to calculate the PLL(from TRM V0.3 Part 1 Page 63):
 196  * Formulas also embedded within the Fractional PLL Verilog model:
 197  * If DSMPD = 1 (DSM is disabled, "integer mode")
 198  * FOUTVCO = FREF / REFDIV * FBDIV
 199  * FOUTPOSTDIV = FOUTVCO / POSTDIV1 / POSTDIV2
 200  * Where:
 201  * FOUTVCO = Fractional PLL non-divided output frequency
 202  * FOUTPOSTDIV = Fractional PLL divided output frequency
 203  *               (output of second post divider)
 204  * FREF = Fractional PLL input reference frequency, (the OSC_HZ 24MHz input)
 205  * REFDIV = Fractional PLL input reference clock divider
 206  * FBDIV = Integer value programmed into feedback divide
 207  *
 208  */
 209 static void rkclk_set_pll(struct rk3328_cru *cru, enum rk_clk_id clk_id,
 210                         const struct pll_div *div)
 211 {
 212         u32 *pll_con;
 213         u32 mode_shift, mode_mask;
 214
 215         pll_con = NULL;
 216         mode_shift = 0;
 217         switch (clk_id) {
 218         case CLK_ARM:
 219                 pll_con = cru->apll_con;
 220                 mode_shift = APLL_MODE_SHIFT;
 221                 break;
 222         case CLK_DDR:
 223                 pll_con = cru->dpll_con;
 224                 mode_shift = DPLL_MODE_SHIFT;
 225                 break;
 226         case CLK_CODEC:
 227                 pll_con = cru->cpll_con;
 228                 mode_shift = CPLL_MODE_SHIFT;
 229                 break;
 230         case CLK_GENERAL:
 231                 pll_con = cru->gpll_con;
 232                 mode_shift = GPLL_MODE_SHIFT;
 233                 break;
 234         case CLK_NEW:
 235                 pll_con = cru->npll_con;
 236                 mode_shift = NPLL_MODE_SHIFT;
 237                 break;
 238         default:
 239                 break;
 240         }
 241         mode_mask = 1 << mode_shift;
 242
 243         /* All 8 PLLs have same VCO and output frequency range restrictions. */
 244         u32 vco_khz = OSC_HZ / 1000 * div->fbdiv / div->refdiv;
 245         u32 output_khz = vco_khz / div->postdiv1 / div->postdiv2;
 246
 247         debug("PLL at %p: fbdiv=%d, refdiv=%d, postdiv1=%d, \
 248               postdiv2=%d, vco=%u khz, output=%u khz\n",
 249               pll_con, div->fbdiv, div->refdiv, div->postdiv1,
 250               div->postdiv2, vco_khz, output_khz);
 251         assert(vco_khz >= VCO_MIN_KHZ && vco_khz <= VCO_MAX_KHZ &&
 252                output_khz >= OUTPUT_MIN_KHZ && output_khz <= OUTPUT_MAX_KHZ &&
 253                div->fbdiv >= PLL_DIV_MIN && div->fbdiv <= PLL_DIV_MAX);
 254
 255         /*
 256          * When power on or changing PLL setting,
 257          * we must force PLL into slow mode to ensure output stable clock.
 258          */
 259         rk_clrsetreg(&cru->mode_con, mode_mask, PLL_MODE_SLOW << mode_shift);
 260
 261         /* use integer mode */
 262         rk_clrsetreg(&pll_con[1], PLL_DSMPD_MASK,
 263                      PLL_INTEGER_MODE << PLL_DSMPD_SHIFT);
 264
 265         rk_clrsetreg(&pll_con[0],
 266                      PLL_FBDIV_MASK | PLL_POSTDIV1_MASK,
 267                      (div->fbdiv << PLL_FBDIV_SHIFT) |
 268                      (div->postdiv1 << PLL_POSTDIV1_SHIFT));
 269         rk_clrsetreg(&pll_con[1],
 270                      PLL_POSTDIV2_MASK | PLL_REFDIV_MASK,
 271                      (div->postdiv2 << PLL_POSTDIV2_SHIFT) |
 272                      (div->refdiv << PLL_REFDIV_SHIFT));
 273
 274         /* waiting for pll lock */
 275         while (!(readl(&pll_con[1]) & (1 << PLL_LOCK_STATUS_SHIFT)))
 276                 udelay(1);
 277
 278         /* pll enter normal mode */
 279         rk_clrsetreg(&cru->mode_con, mode_mask, PLL_MODE_NORM << mode_shift);
 280 }
 281
 282 static void rkclk_init(struct rk3328_cru *cru)
 283 {
 284         u32 aclk_div;
 285         u32 hclk_div;
 286         u32 pclk_div;
 287
 288         rk3328_configure_cpu(cru, APLL_600_MHZ);
 289
 290         /* configure gpll cpll */
 291         rkclk_set_pll(cru, CLK_GENERAL, &gpll_init_cfg);
 292         rkclk_set_pll(cru, CLK_CODEC, &cpll_init_cfg);
 293
 294         /* configure perihp aclk, hclk, pclk */
 295         aclk_div = GPLL_HZ / PERIHP_ACLK_HZ - 1;
 296         hclk_div = PERIHP_ACLK_HZ / PERIHP_HCLK_HZ - 1;
 297         pclk_div = PERIHP_ACLK_HZ / PERIHP_PCLK_HZ - 1;
 298
 299         rk_clrsetreg(&cru->clksel_con[28],
 300                      ACLK_PERIHP_PLL_SEL_MASK | ACLK_PERIHP_DIV_CON_MASK,
 301                      ACLK_PERIHP_PLL_SEL_GPLL << ACLK_PERIHP_PLL_SEL_SHIFT |
 302                      aclk_div << ACLK_PERIHP_DIV_CON_SHIFT);
 303         rk_clrsetreg(&cru->clksel_con[29],
 304                      PCLK_PERIHP_DIV_CON_MASK | HCLK_PERIHP_DIV_CON_MASK,
 305                      pclk_div << PCLK_PERIHP_DIV_CON_SHIFT |
 306                      hclk_div << HCLK_PERIHP_DIV_CON_SHIFT);
 307 }
 308
 309 void rk3328_configure_cpu(struct rk3328_cru *cru,
 310                           enum apll_frequencies apll_freq)
 311 {
 312         u32 clk_core_div;
 313         u32 aclkm_div;
 314         u32 pclk_dbg_div;
 315
 316         rkclk_set_pll(cru, CLK_ARM, apll_cfgs[apll_freq]);
 317
 318         clk_core_div = APLL_HZ / CLK_CORE_HZ - 1;
 319         aclkm_div = APLL_HZ / ACLKM_CORE_HZ / (clk_core_div + 1) - 1;
 320         pclk_dbg_div = APLL_HZ / PCLK_DBG_HZ / (clk_core_div + 1) - 1;
 321
 322         rk_clrsetreg(&cru->clksel_con[0],
 323                      CLK_CORE_PLL_SEL_MASK | CLK_CORE_DIV_MASK,
 324                      CLK_CORE_PLL_SEL_APLL << CLK_CORE_PLL_SEL_SHIFT |
 325                      clk_core_div << CLK_CORE_DIV_SHIFT);
 326
 327         rk_clrsetreg(&cru->clksel_con[1],
 328                      PCLK_DBG_DIV_MASK | ACLKM_CORE_DIV_MASK,
 329                      pclk_dbg_div << PCLK_DBG_DIV_SHIFT |
 330                      aclkm_div << ACLKM_CORE_DIV_SHIFT);
 331 }
 332
 333
 334 static ulong rk3328_i2c_get_clk(struct rk3328_cru *cru, ulong clk_id)
 335 {
 336         u32 div, con;
 337
 338         switch (clk_id) {
 339         case SCLK_I2C0:
 340                 con = readl(&cru->clksel_con[34]);
 341                 div = con >> CLK_I2C0_DIV_CON_SHIFT & CLK_I2C_DIV_CON_MASK;
 342                 break;
 343         case SCLK_I2C1:
 344                 con = readl(&cru->clksel_con[34]);
 345                 div = con >> CLK_I2C1_DIV_CON_SHIFT & CLK_I2C_DIV_CON_MASK;
 346                 break;
 347         case SCLK_I2C2:
 348                 con = readl(&cru->clksel_con[35]);
 349                 div = con >> CLK_I2C2_DIV_CON_SHIFT & CLK_I2C_DIV_CON_MASK;
 350                 break;
 351         case SCLK_I2C3:
 352                 con = readl(&cru->clksel_con[35]);
 353                 div = con >> CLK_I2C3_DIV_CON_SHIFT & CLK_I2C_DIV_CON_MASK;
 354                 break;
 355         default:
 356                 printf("do not support this i2c bus\n");
 357                 return -EINVAL;
 358         }
 359
 360         return DIV_TO_RATE(GPLL_HZ, div);
 361 }
 362
 363 static ulong rk3328_i2c_set_clk(struct rk3328_cru *cru, ulong clk_id, uint hz)
 364 {
 365         int src_clk_div;
 366
 367         src_clk_div = GPLL_HZ / hz;
 368         assert(src_clk_div - 1 < 127);
 369
 370         switch (clk_id) {
 371         case SCLK_I2C0:
 372                 rk_clrsetreg(&cru->clksel_con[34],
 373                              CLK_I2C_DIV_CON_MASK << CLK_I2C0_DIV_CON_SHIFT |
 374                              CLK_I2C_PLL_SEL_MASK << CLK_I2C0_PLL_SEL_SHIFT,
 375                              (src_clk_div - 1) << CLK_I2C0_DIV_CON_SHIFT |
 376                              CLK_I2C_PLL_SEL_GPLL << CLK_I2C0_PLL_SEL_SHIFT);
 377                 break;
 378         case SCLK_I2C1:
 379                 rk_clrsetreg(&cru->clksel_con[34],
 380                              CLK_I2C_DIV_CON_MASK << CLK_I2C1_DIV_CON_SHIFT |
 381                              CLK_I2C_PLL_SEL_MASK << CLK_I2C1_PLL_SEL_SHIFT,
 382                              (src_clk_div - 1) << CLK_I2C1_DIV_CON_SHIFT |
 383                              CLK_I2C_PLL_SEL_GPLL << CLK_I2C1_PLL_SEL_SHIFT);
 384                 break;
 385         case SCLK_I2C2:
 386                 rk_clrsetreg(&cru->clksel_con[35],
 387                              CLK_I2C_DIV_CON_MASK << CLK_I2C2_DIV_CON_SHIFT |
 388                              CLK_I2C_PLL_SEL_MASK << CLK_I2C2_PLL_SEL_SHIFT,
 389                              (src_clk_div - 1) << CLK_I2C2_DIV_CON_SHIFT |
 390                              CLK_I2C_PLL_SEL_GPLL << CLK_I2C2_PLL_SEL_SHIFT);
 391                 break;
 392         case SCLK_I2C3:
 393                 rk_clrsetreg(&cru->clksel_con[35],
 394                              CLK_I2C_DIV_CON_MASK << CLK_I2C3_DIV_CON_SHIFT |
 395                              CLK_I2C_PLL_SEL_MASK << CLK_I2C3_PLL_SEL_SHIFT,
 396                              (src_clk_div - 1) << CLK_I2C3_DIV_CON_SHIFT |
 397                              CLK_I2C_PLL_SEL_GPLL << CLK_I2C3_PLL_SEL_SHIFT);
 398                 break;
 399         default:
 400                 printf("do not support this i2c bus\n");
 401                 return -EINVAL;
 402         }
 403
 404         return DIV_TO_RATE(GPLL_HZ, src_clk_div);
 405 }
 406
 407 static ulong rk3328_gmac2io_set_clk(struct rk3328_cru *cru, ulong rate)
 408 {
 409         struct rk3328_grf_regs *grf;
 410         ulong ret;
 411
 412         grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
 413
 414         /*
 415          * The RGMII CLK can be derived either from an external "clkin"
 416          * or can be generated from internally by a divider from SCLK_MAC.
 417          */
 418         if (readl(&grf->mac_con[1]) & BIT(10) &&
 419             readl(&grf->soc_con[4]) & BIT(14)) {
 420                 /* An external clock will always generate the right rate... */
 421                 ret = rate;
 422         } else {
 423                 u32 con = readl(&cru->clksel_con[27]);
 424                 ulong pll_rate;
 425                 u8 div;
 426
 427                 if ((con >> GMAC2IO_PLL_SEL_SHIFT) & GMAC2IO_PLL_SEL_GPLL)
 428                         pll_rate = GPLL_HZ;
 429                 else
 430                         pll_rate = CPLL_HZ;
 431
 432                 div = DIV_ROUND_UP(pll_rate, rate) - 1;
 433                 if (div <= 0x1f)
 434                         rk_clrsetreg(&cru->clksel_con[27], GMAC2IO_CLK_DIV_MASK,
 435                                      div << GMAC2IO_CLK_DIV_SHIFT);
 436                 else
 437                         debug("Unsupported div for gmac:%d\n", div);
 438
 439                 return DIV_TO_RATE(pll_rate, div);
 440         }
 441
 442         return ret;
 443 }
 444
 445 static ulong rk3328_mmc_get_clk(struct rk3328_cru *cru, uint clk_id)
 446 {
 447         u32 div, con, con_id;
 448
 449         switch (clk_id) {
 450         case HCLK_SDMMC:
 451         case SCLK_SDMMC:
 452                 con_id = 30;
 453                 break;
 454         case HCLK_EMMC:
 455         case SCLK_EMMC:
 456                 con_id = 32;
 457                 break;
 458         default:
 459                 return -EINVAL;
 460         }
 461         con = readl(&cru->clksel_con[con_id]);
 462         div = (con & CLK_EMMC_DIV_CON_MASK) >> CLK_EMMC_DIV_CON_SHIFT;
 463
 464         if ((con & CLK_EMMC_PLL_MASK) >> CLK_EMMC_PLL_SHIFT
 465             == CLK_EMMC_PLL_SEL_24M)
 466                 return DIV_TO_RATE(OSC_HZ, div) / 2;
 467         else
 468                 return DIV_TO_RATE(GPLL_HZ, div) / 2;
 469 }
 470
 471 static ulong rk3328_mmc_set_clk(struct rk3328_cru *cru,
 472                                 ulong clk_id, ulong set_rate)
 473 {
 474         int src_clk_div;
 475         u32 con_id;
 476
 477         switch (clk_id) {
 478         case HCLK_SDMMC:
 479         case SCLK_SDMMC:
 480                 con_id = 30;
 481                 break;
 482         case HCLK_EMMC:
 483         case SCLK_EMMC:
 484                 con_id = 32;
 485                 break;
 486         default:
 487                 return -EINVAL;
 488         }
 489         /* Select clk_sdmmc/emmc source from GPLL by default */
 490         /* mmc clock defaulg div 2 internal, need provide double in cru */
 491         src_clk_div = DIV_ROUND_UP(GPLL_HZ / 2, set_rate);
 492
 493         if (src_clk_div > 127) {
 494                 /* use 24MHz source for 400KHz clock */
 495                 src_clk_div = DIV_ROUND_UP(OSC_HZ / 2, set_rate);
 496                 rk_clrsetreg(&cru->clksel_con[con_id],
 497                              CLK_EMMC_PLL_MASK | CLK_EMMC_DIV_CON_MASK,
 498                              CLK_EMMC_PLL_SEL_24M << CLK_EMMC_PLL_SHIFT |
 499                              (src_clk_div - 1) << CLK_EMMC_DIV_CON_SHIFT);
 500         } else {
 501                 rk_clrsetreg(&cru->clksel_con[con_id],
 502                              CLK_EMMC_PLL_MASK | CLK_EMMC_DIV_CON_MASK,
 503                              CLK_EMMC_PLL_SEL_GPLL << CLK_EMMC_PLL_SHIFT |
 504                              (src_clk_div - 1) << CLK_EMMC_DIV_CON_SHIFT);
 505         }
 506
 507         return rk3328_mmc_get_clk(cru, clk_id);
 508 }
 509
 510 static ulong rk3328_pwm_get_clk(struct rk3328_cru *cru)
 511 {
 512         u32 div, con;
 513
 514         con = readl(&cru->clksel_con[24]);
 515         div = (con & CLK_PWM_DIV_CON_MASK) >> CLK_PWM_DIV_CON_SHIFT;
 516
 517         return DIV_TO_RATE(GPLL_HZ, div);
 518 }
 519
 520 static ulong rk3328_pwm_set_clk(struct rk3328_cru *cru, uint hz)
 521 {
 522         u32 div = GPLL_HZ / hz;
 523
 524         rk_clrsetreg(&cru->clksel_con[24],
 525                      CLK_PWM_PLL_SEL_MASK | CLK_PWM_DIV_CON_MASK,
 526                      CLK_PWM_PLL_SEL_GPLL << CLK_PWM_PLL_SEL_SHIFT |
 527                      (div - 1) << CLK_PWM_DIV_CON_SHIFT);
 528
 529         return DIV_TO_RATE(GPLL_HZ, div);
 530 }
 531
 532 static ulong rk3328_saradc_get_clk(struct rk3328_cru *cru)
 533 {
 534         u32 div, val;
 535
 536         val = readl(&cru->clksel_con[23]);
 537         div = bitfield_extract(val, CLK_SARADC_DIV_CON_SHIFT,
 538                                CLK_SARADC_DIV_CON_WIDTH);
 539
 540         return DIV_TO_RATE(OSC_HZ, div);
 541 }
 542
 543 static ulong rk3328_saradc_set_clk(struct rk3328_cru *cru, uint hz)
 544 {
 545         int src_clk_div;
 546
 547         src_clk_div = DIV_ROUND_UP(OSC_HZ, hz) - 1;
 548         assert(src_clk_div < 128);
 549
 550         rk_clrsetreg(&cru->clksel_con[23],
 551                      CLK_SARADC_DIV_CON_MASK,
 552                      src_clk_div << CLK_SARADC_DIV_CON_SHIFT);
 553
 554         return rk3328_saradc_get_clk(cru);
 555 }
 556
 557 static ulong rk3328_clk_get_rate(struct clk *clk)
 558 {
 559         struct rk3328_clk_priv *priv = dev_get_priv(clk->dev);
 560         ulong rate = 0;
 561
 562         switch (clk->id) {
 563         case 0 ... 29:
 564                 return 0;
 565         case HCLK_SDMMC:
 566         case HCLK_EMMC:
 567         case SCLK_SDMMC:
 568         case SCLK_EMMC:
 569                 rate = rk3328_mmc_get_clk(priv->cru, clk->id);
 570                 break;
 571         case SCLK_I2C0:
 572         case SCLK_I2C1:
 573         case SCLK_I2C2:
 574         case SCLK_I2C3:
 575                 rate = rk3328_i2c_get_clk(priv->cru, clk->id);
 576                 break;
 577         case SCLK_PWM:
 578                 rate = rk3328_pwm_get_clk(priv->cru);
 579                 break;
 580         case SCLK_SARADC:
 581                 rate = rk3328_saradc_get_clk(priv->cru);
 582                 break;
 583         default:
 584                 return -ENOENT;
 585         }
 586
 587         return rate;
 588 }
 589
 590 static ulong rk3328_clk_set_rate(struct clk *clk, ulong rate)
 591 {
 592         struct rk3328_clk_priv *priv = dev_get_priv(clk->dev);
 593         ulong ret = 0;
 594
 595         switch (clk->id) {
 596         case 0 ... 29:
 597                 return 0;
 598         case HCLK_SDMMC:
 599         case HCLK_EMMC:
 600         case SCLK_SDMMC:
 601         case SCLK_EMMC:
 602                 ret = rk3328_mmc_set_clk(priv->cru, clk->id, rate);
 603                 break;
 604         case SCLK_I2C0:
 605         case SCLK_I2C1:
 606         case SCLK_I2C2:
 607         case SCLK_I2C3:
 608                 ret = rk3328_i2c_set_clk(priv->cru, clk->id, rate);
 609                 break;
 610         case SCLK_MAC2IO:
 611                 ret = rk3328_gmac2io_set_clk(priv->cru, rate);
 612                 break;
 613         case SCLK_PWM:
 614                 ret = rk3328_pwm_set_clk(priv->cru, rate);
 615                 break;
 616         case SCLK_SARADC:
 617                 ret = rk3328_saradc_set_clk(priv->cru, rate);
 618                 break;
 619         case DCLK_LCDC:
 620         case SCLK_PDM:
 621         case SCLK_RTC32K:
 622         case SCLK_UART0:
 623         case SCLK_UART1:
 624         case SCLK_UART2:
 625         case SCLK_SDIO:
 626         case SCLK_TSP:
 627         case SCLK_WIFI:
 628         case ACLK_BUS_PRE:
 629         case HCLK_BUS_PRE:
 630         case PCLK_BUS_PRE:
 631         case ACLK_PERI_PRE:
 632         case HCLK_PERI:
 633         case PCLK_PERI:
 634         case ACLK_VIO_PRE:
 635         case HCLK_VIO_PRE:
 636         case ACLK_RGA_PRE:
 637         case SCLK_RGA:
 638         case ACLK_VOP_PRE:
 639         case ACLK_RKVDEC_PRE:
 640         case ACLK_RKVENC:
 641         case ACLK_VPU_PRE:
 642         case SCLK_VDEC_CABAC:
 643         case SCLK_VDEC_CORE:
 644         case SCLK_VENC_CORE:
 645         case SCLK_VENC_DSP:
 646         case SCLK_EFUSE:
 647         case PCLK_DDR:
 648         case ACLK_GMAC:
 649         case PCLK_GMAC:
 650         case SCLK_USB3OTG_SUSPEND:
 651                 return 0;
 652         default:
 653                 return -ENOENT;
 654         }
 655
 656         return ret;
 657 }
 658
 659 static int rk3328_gmac2io_set_parent(struct clk *clk, struct clk *parent)
 660 {
 661         struct rk3328_grf_regs *grf;
 662         const char *clock_output_name;
 663         int ret;
 664
 665         grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
 666
 667         /*
 668          * If the requested parent is in the same clock-controller and the id
 669          * is SCLK_MAC2IO_SRC ("clk_mac2io_src"), switch to the internal clock.
 670          */
 671         if ((parent->dev == clk->dev) && (parent->id == SCLK_MAC2IO_SRC)) {
 672                 debug("%s: switching RGMII to SCLK_MAC2IO_SRC\n", __func__);
 673                 rk_clrreg(&grf->mac_con[1], BIT(10));
 674                 return 0;
 675         }
 676
 677         /*
 678          * Otherwise, we need to check the clock-output-names of the
 679          * requested parent to see if the requested id is "gmac_clkin".
 680          */
 681         ret = dev_read_string_index(parent->dev, "clock-output-names",
 682                                     parent->id, &clock_output_name);
 683         if (ret < 0)
 684                 return -ENODATA;
 685
 686         /* If this is "gmac_clkin", switch to the external clock input */
 687         if (!strcmp(clock_output_name, "gmac_clkin")) {
 688                 debug("%s: switching RGMII to CLKIN\n", __func__);
 689                 rk_setreg(&grf->mac_con[1], BIT(10));
 690                 return 0;
 691         }
 692
 693         return -EINVAL;
 694 }
 695
 696 static int rk3328_gmac2io_ext_set_parent(struct clk *clk, struct clk *parent)
 697 {
 698         struct rk3328_grf_regs *grf;
 699         const char *clock_output_name;
 700         int ret;
 701
 702         grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
 703
 704         /*
 705          * If the requested parent is in the same clock-controller and the id
 706          * is SCLK_MAC2IO ("clk_mac2io"), switch to the internal clock.
 707          */
 708         if ((parent->dev == clk->dev) && (parent->id == SCLK_MAC2IO)) {
 709                 debug("%s: switching RGMII to SCLK_MAC2IO\n", __func__);
 710                 rk_clrreg(&grf->soc_con[4], BIT(14));
 711                 return 0;
 712         }
 713
 714         /*
 715          * Otherwise, we need to check the clock-output-names of the
 716          * requested parent to see if the requested id is "gmac_clkin".
 717          */
 718         ret = dev_read_string_index(parent->dev, "clock-output-names",
 719                                     parent->id, &clock_output_name);
 720         if (ret < 0)
 721                 return -ENODATA;
 722
 723         /* If this is "gmac_clkin", switch to the external clock input */
 724         if (!strcmp(clock_output_name, "gmac_clkin")) {
 725                 debug("%s: switching RGMII to CLKIN\n", __func__);
 726                 rk_setreg(&grf->soc_con[4], BIT(14));
 727                 return 0;
 728         }
 729
 730         return -EINVAL;
 731 }
 732
 733 static int rk3328_clk_set_parent(struct clk *clk, struct clk *parent)
 734 {
 735         switch (clk->id) {
 736         case SCLK_MAC2IO:
 737                 return rk3328_gmac2io_set_parent(clk, parent);
 738         case SCLK_MAC2IO_EXT:
 739                 return rk3328_gmac2io_ext_set_parent(clk, parent);
 740         case DCLK_LCDC:
 741         case SCLK_PDM:
 742         case SCLK_RTC32K:
 743         case SCLK_UART0:
 744         case SCLK_UART1:
 745         case SCLK_UART2:
 746                 return 0;
 747         }
 748
 749         debug("%s: unsupported clk %ld\n", __func__, clk->id);
 750         return -ENOENT;
 751 }
 752
 753 static struct clk_ops rk3328_clk_ops = {
 754         .get_rate = rk3328_clk_get_rate,
 755         .set_rate = rk3328_clk_set_rate,
 756         .set_parent = rk3328_clk_set_parent,
 757 };
 758
 759 static int rk3328_clk_probe(struct udevice *dev)
 760 {
 761         struct rk3328_clk_priv *priv = dev_get_priv(dev);
 762
 763         rkclk_init(priv->cru);
 764
 765         return 0;
 766 }
 767
 768 static int rk3328_clk_ofdata_to_platdata(struct udevice *dev)
 769 {
 770         struct rk3328_clk_priv *priv = dev_get_priv(dev);
 771
 772         priv->cru = dev_read_addr_ptr(dev);
 773
 774         return 0;
 775 }
 776
 777 static int rk3328_clk_bind(struct udevice *dev)
 778 {
 779         int ret;
 780         struct udevice *sys_child;
 781         struct sysreset_reg *priv;
 782
 783         /* The reset driver does not have a device node, so bind it here */
 784         ret = device_bind_driver(dev, "rockchip_sysreset", "sysreset",
 785                                  &sys_child);
 786         if (ret) {
 787                 debug("Warning: No sysreset driver: ret=%d\n", ret);
 788         } else {
 789                 priv = malloc(sizeof(struct sysreset_reg));
 790                 priv->glb_srst_fst_value = offsetof(struct rk3328_cru,
 791                                                     glb_srst_fst_value);
 792                 priv->glb_srst_snd_value = offsetof(struct rk3328_cru,
 793                                                     glb_srst_snd_value);
 794                 sys_child->priv = priv;
 795         }
 796
 797 #if CONFIG_IS_ENABLED(RESET_ROCKCHIP)
 798         ret = offsetof(struct rk3328_cru, softrst_con[0]);
 799         ret = rockchip_reset_bind(dev, ret, 12);
 800         if (ret)
 801                 debug("Warning: software reset driver bind faile\n");
 802 #endif
 803
 804         return ret;
 805 }
 806
 807 static const struct udevice_id rk3328_clk_ids[] = {
 808         { .compatible = "rockchip,rk3328-cru" },
 809         { }
 810 };
 811
 812 U_BOOT_DRIVER(rockchip_rk3328_cru) = {
 813         .name           = "rockchip_rk3328_cru",
 814         .id             = UCLASS_CLK,
 815         .of_match       = rk3328_clk_ids,
 816         .priv_auto_alloc_size = sizeof(struct rk3328_clk_priv),
 817         .ofdata_to_platdata = rk3328_clk_ofdata_to_platdata,
 818         .ops            = &rk3328_clk_ops,
 819         .bind           = rk3328_clk_bind,
 820         .probe          = rk3328_clk_probe,
 821 };