git.sur5r.net Git - u-boot/blob - arch/arm/cpu/armv7/exynos/clock.c

   1 /*
   2  * Copyright (C) 2010 Samsung Electronics
   3  * Minkyu Kang <mk7.kang@samsung.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <asm/io.h>
  10 #include <asm/arch/clock.h>
  11 #include <asm/arch/clk.h>
  12 #include <asm/arch/periph.h>
  13
  14 #define PLL_DIV_1024    1024
  15 #define PLL_DIV_65535   65535
  16 #define PLL_DIV_65536   65536
  17
  18 /* *
  19  * This structure is to store the src bit, div bit and prediv bit
  20  * positions of the peripheral clocks of the src and div registers
  21  */
  22 struct clk_bit_info {
  23         int8_t src_bit;
  24         int8_t div_bit;
  25         int8_t prediv_bit;
  26 };
  27
  28 /* src_bit div_bit prediv_bit */
  29 static struct clk_bit_info clk_bit_info[PERIPH_ID_COUNT] = {
  30         {0,     0,      -1},
  31         {4,     4,      -1},
  32         {8,     8,      -1},
  33         {12,    12,     -1},
  34         {0,     0,      8},
  35         {4,     16,     24},
  36         {8,     0,      8},
  37         {12,    16,     24},
  38         {-1,    -1,     -1},
  39         {16,    0,      8},
  40         {20,    16,     24},
  41         {24,    0,      8},
  42         {0,     0,      4},
  43         {4,     12,     16},
  44         {-1,    -1,     -1},
  45         {-1,    -1,     -1},
  46         {-1,    24,     0},
  47         {-1,    24,     0},
  48         {-1,    24,     0},
  49         {-1,    24,     0},
  50         {-1,    24,     0},
  51         {-1,    24,     0},
  52         {-1,    24,     0},
  53         {-1,    24,     0},
  54         {24,    0,      -1},
  55         {24,    0,      -1},
  56         {24,    0,      -1},
  57         {24,    0,      -1},
  58         {24,    0,      -1},
  59 };
  60
  61 /* Epll Clock division values to achive different frequency output */
  62 static struct set_epll_con_val exynos5_epll_div[] = {
  63         { 192000000, 0, 48, 3, 1, 0 },
  64         { 180000000, 0, 45, 3, 1, 0 },
  65         {  73728000, 1, 73, 3, 3, 47710 },
  66         {  67737600, 1, 90, 4, 3, 20762 },
  67         {  49152000, 0, 49, 3, 3, 9961 },
  68         {  45158400, 0, 45, 3, 3, 10381 },
  69         { 180633600, 0, 45, 3, 1, 10381 }
  70 };
  71
  72 /* exynos: return pll clock frequency */
  73 static int exynos_get_pll_clk(int pllreg, unsigned int r, unsigned int k)
  74 {
  75         unsigned long m, p, s = 0, mask, fout;
  76         unsigned int div;
  77         unsigned int freq;
  78         /*
  79          * APLL_CON: MIDV [25:16]
  80          * MPLL_CON: MIDV [25:16]
  81          * EPLL_CON: MIDV [24:16]
  82          * VPLL_CON: MIDV [24:16]
  83          * BPLL_CON: MIDV [25:16]: Exynos5
  84          */
  85         if (pllreg == APLL || pllreg == MPLL || pllreg == BPLL)
  86                 mask = 0x3ff;
  87         else
  88                 mask = 0x1ff;
  89
  90         m = (r >> 16) & mask;
  91
  92         /* PDIV [13:8] */
  93         p = (r >> 8) & 0x3f;
  94         /* SDIV [2:0] */
  95         s = r & 0x7;
  96
  97         freq = CONFIG_SYS_CLK_FREQ;
  98
  99         if (pllreg == EPLL) {
 100                 k = k & 0xffff;
 101                 /* FOUT = (MDIV + K / 65536) * FIN / (PDIV * 2^SDIV) */
 102                 fout = (m + k / PLL_DIV_65536) * (freq / (p * (1 << s)));
 103         } else if (pllreg == VPLL) {
 104                 k = k & 0xfff;
 105
 106                 /*
 107                  * Exynos4210
 108                  * FOUT = (MDIV + K / 1024) * FIN / (PDIV * 2^SDIV)
 109                  *
 110                  * Exynos4412
 111                  * FOUT = (MDIV + K / 65535) * FIN / (PDIV * 2^SDIV)
 112                  *
 113                  * Exynos5250
 114                  * FOUT = (MDIV + K / 65536) * FIN / (PDIV * 2^SDIV)
 115                  */
 116                 if (proid_is_exynos4210())
 117                         div = PLL_DIV_1024;
 118                 else if (proid_is_exynos4412())
 119                         div = PLL_DIV_65535;
 120                 else if (proid_is_exynos5250())
 121                         div = PLL_DIV_65536;
 122                 else
 123                         return 0;
 124
 125                 fout = (m + k / div) * (freq / (p * (1 << s)));
 126         } else {
 127                 /*
 128                  * Exynos4412 / Exynos5250
 129                  * FOUT = MDIV * FIN / (PDIV * 2^SDIV)
 130                  *
 131                  * Exynos4210
 132                  * FOUT = MDIV * FIN / (PDIV * 2^(SDIV-1))
 133                  */
 134                 if (proid_is_exynos4210())
 135                         fout = m * (freq / (p * (1 << (s - 1))));
 136                 else
 137                         fout = m * (freq / (p * (1 << s)));
 138         }
 139         return fout;
 140 }
 141
 142 /* exynos4: return pll clock frequency */
 143 static unsigned long exynos4_get_pll_clk(int pllreg)
 144 {
 145         struct exynos4_clock *clk =
 146                 (struct exynos4_clock *)samsung_get_base_clock();
 147         unsigned long r, k = 0;
 148
 149         switch (pllreg) {
 150         case APLL:
 151                 r = readl(&clk->apll_con0);
 152                 break;
 153         case MPLL:
 154                 r = readl(&clk->mpll_con0);
 155                 break;
 156         case EPLL:
 157                 r = readl(&clk->epll_con0);
 158                 k = readl(&clk->epll_con1);
 159                 break;
 160         case VPLL:
 161                 r = readl(&clk->vpll_con0);
 162                 k = readl(&clk->vpll_con1);
 163                 break;
 164         default:
 165                 printf("Unsupported PLL (%d)\n", pllreg);
 166                 return 0;
 167         }
 168
 169         return exynos_get_pll_clk(pllreg, r, k);
 170 }
 171
 172 /* exynos4x12: return pll clock frequency */
 173 static unsigned long exynos4x12_get_pll_clk(int pllreg)
 174 {
 175         struct exynos4x12_clock *clk =
 176                 (struct exynos4x12_clock *)samsung_get_base_clock();
 177         unsigned long r, k = 0;
 178
 179         switch (pllreg) {
 180         case APLL:
 181                 r = readl(&clk->apll_con0);
 182                 break;
 183         case MPLL:
 184                 r = readl(&clk->mpll_con0);
 185                 break;
 186         case EPLL:
 187                 r = readl(&clk->epll_con0);
 188                 k = readl(&clk->epll_con1);
 189                 break;
 190         case VPLL:
 191                 r = readl(&clk->vpll_con0);
 192                 k = readl(&clk->vpll_con1);
 193                 break;
 194         default:
 195                 printf("Unsupported PLL (%d)\n", pllreg);
 196                 return 0;
 197         }
 198
 199         return exynos_get_pll_clk(pllreg, r, k);
 200 }
 201
 202 /* exynos5: return pll clock frequency */
 203 static unsigned long exynos5_get_pll_clk(int pllreg)
 204 {
 205         struct exynos5_clock *clk =
 206                 (struct exynos5_clock *)samsung_get_base_clock();
 207         unsigned long r, k = 0, fout;
 208         unsigned int pll_div2_sel, fout_sel;
 209
 210         switch (pllreg) {
 211         case APLL:
 212                 r = readl(&clk->apll_con0);
 213                 break;
 214         case MPLL:
 215                 r = readl(&clk->mpll_con0);
 216                 break;
 217         case EPLL:
 218                 r = readl(&clk->epll_con0);
 219                 k = readl(&clk->epll_con1);
 220                 break;
 221         case VPLL:
 222                 r = readl(&clk->vpll_con0);
 223                 k = readl(&clk->vpll_con1);
 224                 break;
 225         case BPLL:
 226                 r = readl(&clk->bpll_con0);
 227                 break;
 228         default:
 229                 printf("Unsupported PLL (%d)\n", pllreg);
 230                 return 0;
 231         }
 232
 233         fout = exynos_get_pll_clk(pllreg, r, k);
 234
 235         /* According to the user manual, in EVT1 MPLL and BPLL always gives
 236          * 1.6GHz clock, so divide by 2 to get 800MHz MPLL clock.*/
 237         if (pllreg == MPLL || pllreg == BPLL) {
 238                 pll_div2_sel = readl(&clk->pll_div2_sel);
 239
 240                 switch (pllreg) {
 241                 case MPLL:
 242                         fout_sel = (pll_div2_sel >> MPLL_FOUT_SEL_SHIFT)
 243                                         & MPLL_FOUT_SEL_MASK;
 244                         break;
 245                 case BPLL:
 246                         fout_sel = (pll_div2_sel >> BPLL_FOUT_SEL_SHIFT)
 247                                         & BPLL_FOUT_SEL_MASK;
 248                         break;
 249                 default:
 250                         fout_sel = -1;
 251                         break;
 252                 }
 253
 254                 if (fout_sel == 0)
 255                         fout /= 2;
 256         }
 257
 258         return fout;
 259 }
 260
 261 static unsigned long exynos5_get_periph_rate(int peripheral)
 262 {
 263         struct clk_bit_info *bit_info = &clk_bit_info[peripheral];
 264         unsigned long sclk, sub_clk;
 265         unsigned int src, div, sub_div;
 266         struct exynos5_clock *clk =
 267                         (struct exynos5_clock *)samsung_get_base_clock();
 268
 269         switch (peripheral) {
 270         case PERIPH_ID_UART0:
 271         case PERIPH_ID_UART1:
 272         case PERIPH_ID_UART2:
 273         case PERIPH_ID_UART3:
 274                 src = readl(&clk->src_peric0);
 275                 div = readl(&clk->div_peric0);
 276                 break;
 277         case PERIPH_ID_PWM0:
 278         case PERIPH_ID_PWM1:
 279         case PERIPH_ID_PWM2:
 280         case PERIPH_ID_PWM3:
 281         case PERIPH_ID_PWM4:
 282                 src = readl(&clk->src_peric0);
 283                 div = readl(&clk->div_peric3);
 284                 break;
 285         case PERIPH_ID_I2S0:
 286                 src = readl(&clk->src_mau);
 287                 div = readl(&clk->div_mau);
 288         case PERIPH_ID_SPI0:
 289         case PERIPH_ID_SPI1:
 290                 src = readl(&clk->src_peric1);
 291                 div = readl(&clk->div_peric1);
 292                 break;
 293         case PERIPH_ID_SPI2:
 294                 src = readl(&clk->src_peric1);
 295                 div = readl(&clk->div_peric2);
 296                 break;
 297         case PERIPH_ID_SPI3:
 298         case PERIPH_ID_SPI4:
 299                 src = readl(&clk->sclk_src_isp);
 300                 div = readl(&clk->sclk_div_isp);
 301                 break;
 302         case PERIPH_ID_SDMMC0:
 303         case PERIPH_ID_SDMMC1:
 304         case PERIPH_ID_SDMMC2:
 305         case PERIPH_ID_SDMMC3:
 306                 src = readl(&clk->src_fsys);
 307                 div = readl(&clk->div_fsys1);
 308                 break;
 309         case PERIPH_ID_I2C0:
 310         case PERIPH_ID_I2C1:
 311         case PERIPH_ID_I2C2:
 312         case PERIPH_ID_I2C3:
 313         case PERIPH_ID_I2C4:
 314         case PERIPH_ID_I2C5:
 315         case PERIPH_ID_I2C6:
 316         case PERIPH_ID_I2C7:
 317                 sclk = exynos5_get_pll_clk(MPLL);
 318                 sub_div = ((readl(&clk->div_top1) >> bit_info->div_bit)
 319                                                                 & 0x7) + 1;
 320                 div = ((readl(&clk->div_top0) >> bit_info->prediv_bit)
 321                                                                 & 0x7) + 1;
 322                 return (sclk / sub_div) / div;
 323         default:
 324                 debug("%s: invalid peripheral %d", __func__, peripheral);
 325                 return -1;
 326         };
 327
 328         src = (src >> bit_info->src_bit) & 0xf;
 329
 330         switch (src) {
 331         case EXYNOS_SRC_MPLL:
 332                 sclk = exynos5_get_pll_clk(MPLL);
 333                 break;
 334         case EXYNOS_SRC_EPLL:
 335                 sclk = exynos5_get_pll_clk(EPLL);
 336                 break;
 337         case EXYNOS_SRC_VPLL:
 338                 sclk = exynos5_get_pll_clk(VPLL);
 339                 break;
 340         default:
 341                 return 0;
 342         }
 343
 344         /* Ratio clock division for this peripheral */
 345         sub_div = (div >> bit_info->div_bit) & 0xf;
 346         sub_clk = sclk / (sub_div + 1);
 347
 348         /* Pre-ratio clock division for SDMMC0 and 2 */
 349         if (peripheral == PERIPH_ID_SDMMC0 || peripheral == PERIPH_ID_SDMMC2) {
 350                 div = (div >> bit_info->prediv_bit) & 0xff;
 351                 return sub_clk / (div + 1);
 352         }
 353
 354         return sub_clk;
 355 }
 356
 357 unsigned long clock_get_periph_rate(int peripheral)
 358 {
 359         if (cpu_is_exynos5())
 360                 return exynos5_get_periph_rate(peripheral);
 361         else
 362                 return 0;
 363 }
 364
 365 /* exynos4: return ARM clock frequency */
 366 static unsigned long exynos4_get_arm_clk(void)
 367 {
 368         struct exynos4_clock *clk =
 369                 (struct exynos4_clock *)samsung_get_base_clock();
 370         unsigned long div;
 371         unsigned long armclk;
 372         unsigned int core_ratio;
 373         unsigned int core2_ratio;
 374
 375         div = readl(&clk->div_cpu0);
 376
 377         /* CORE_RATIO: [2:0], CORE2_RATIO: [30:28] */
 378         core_ratio = (div >> 0) & 0x7;
 379         core2_ratio = (div >> 28) & 0x7;
 380
 381         armclk = get_pll_clk(APLL) / (core_ratio + 1);
 382         armclk /= (core2_ratio + 1);
 383
 384         return armclk;
 385 }
 386
 387 /* exynos4x12: return ARM clock frequency */
 388 static unsigned long exynos4x12_get_arm_clk(void)
 389 {
 390         struct exynos4x12_clock *clk =
 391                 (struct exynos4x12_clock *)samsung_get_base_clock();
 392         unsigned long div;
 393         unsigned long armclk;
 394         unsigned int core_ratio;
 395         unsigned int core2_ratio;
 396
 397         div = readl(&clk->div_cpu0);
 398
 399         /* CORE_RATIO: [2:0], CORE2_RATIO: [30:28] */
 400         core_ratio = (div >> 0) & 0x7;
 401         core2_ratio = (div >> 28) & 0x7;
 402
 403         armclk = get_pll_clk(APLL) / (core_ratio + 1);
 404         armclk /= (core2_ratio + 1);
 405
 406         return armclk;
 407 }
 408
 409 /* exynos5: return ARM clock frequency */
 410 static unsigned long exynos5_get_arm_clk(void)
 411 {
 412         struct exynos5_clock *clk =
 413                 (struct exynos5_clock *)samsung_get_base_clock();
 414         unsigned long div;
 415         unsigned long armclk;
 416         unsigned int arm_ratio;
 417         unsigned int arm2_ratio;
 418
 419         div = readl(&clk->div_cpu0);
 420
 421         /* ARM_RATIO: [2:0], ARM2_RATIO: [30:28] */
 422         arm_ratio = (div >> 0) & 0x7;
 423         arm2_ratio = (div >> 28) & 0x7;
 424
 425         armclk = get_pll_clk(APLL) / (arm_ratio + 1);
 426         armclk /= (arm2_ratio + 1);
 427
 428         return armclk;
 429 }
 430
 431 /* exynos4: return pwm clock frequency */
 432 static unsigned long exynos4_get_pwm_clk(void)
 433 {
 434         struct exynos4_clock *clk =
 435                 (struct exynos4_clock *)samsung_get_base_clock();
 436         unsigned long pclk, sclk;
 437         unsigned int sel;
 438         unsigned int ratio;
 439
 440         if (s5p_get_cpu_rev() == 0) {
 441                 /*
 442                  * CLK_SRC_PERIL0
 443                  * PWM_SEL [27:24]
 444                  */
 445                 sel = readl(&clk->src_peril0);
 446                 sel = (sel >> 24) & 0xf;
 447
 448                 if (sel == 0x6)
 449                         sclk = get_pll_clk(MPLL);
 450                 else if (sel == 0x7)
 451                         sclk = get_pll_clk(EPLL);
 452                 else if (sel == 0x8)
 453                         sclk = get_pll_clk(VPLL);
 454                 else
 455                         return 0;
 456
 457                 /*
 458                  * CLK_DIV_PERIL3
 459                  * PWM_RATIO [3:0]
 460                  */
 461                 ratio = readl(&clk->div_peril3);
 462                 ratio = ratio & 0xf;
 463         } else if (s5p_get_cpu_rev() == 1) {
 464                 sclk = get_pll_clk(MPLL);
 465                 ratio = 8;
 466         } else
 467                 return 0;
 468
 469         pclk = sclk / (ratio + 1);
 470
 471         return pclk;
 472 }
 473
 474 /* exynos4x12: return pwm clock frequency */
 475 static unsigned long exynos4x12_get_pwm_clk(void)
 476 {
 477         unsigned long pclk, sclk;
 478         unsigned int ratio;
 479
 480         sclk = get_pll_clk(MPLL);
 481         ratio = 8;
 482
 483         pclk = sclk / (ratio + 1);
 484
 485         return pclk;
 486 }
 487
 488 /* exynos4: return uart clock frequency */
 489 static unsigned long exynos4_get_uart_clk(int dev_index)
 490 {
 491         struct exynos4_clock *clk =
 492                 (struct exynos4_clock *)samsung_get_base_clock();
 493         unsigned long uclk, sclk;
 494         unsigned int sel;
 495         unsigned int ratio;
 496
 497         /*
 498          * CLK_SRC_PERIL0
 499          * UART0_SEL [3:0]
 500          * UART1_SEL [7:4]
 501          * UART2_SEL [8:11]
 502          * UART3_SEL [12:15]
 503          * UART4_SEL [16:19]
 504          * UART5_SEL [23:20]
 505          */
 506         sel = readl(&clk->src_peril0);
 507         sel = (sel >> (dev_index << 2)) & 0xf;
 508
 509         if (sel == 0x6)
 510                 sclk = get_pll_clk(MPLL);
 511         else if (sel == 0x7)
 512                 sclk = get_pll_clk(EPLL);
 513         else if (sel == 0x8)
 514                 sclk = get_pll_clk(VPLL);
 515         else
 516                 return 0;
 517
 518         /*
 519          * CLK_DIV_PERIL0
 520          * UART0_RATIO [3:0]
 521          * UART1_RATIO [7:4]
 522          * UART2_RATIO [8:11]
 523          * UART3_RATIO [12:15]
 524          * UART4_RATIO [16:19]
 525          * UART5_RATIO [23:20]
 526          */
 527         ratio = readl(&clk->div_peril0);
 528         ratio = (ratio >> (dev_index << 2)) & 0xf;
 529
 530         uclk = sclk / (ratio + 1);
 531
 532         return uclk;
 533 }
 534
 535 /* exynos4x12: return uart clock frequency */
 536 static unsigned long exynos4x12_get_uart_clk(int dev_index)
 537 {
 538         struct exynos4x12_clock *clk =
 539                 (struct exynos4x12_clock *)samsung_get_base_clock();
 540         unsigned long uclk, sclk;
 541         unsigned int sel;
 542         unsigned int ratio;
 543
 544         /*
 545          * CLK_SRC_PERIL0
 546          * UART0_SEL [3:0]
 547          * UART1_SEL [7:4]
 548          * UART2_SEL [8:11]
 549          * UART3_SEL [12:15]
 550          * UART4_SEL [16:19]
 551          */
 552         sel = readl(&clk->src_peril0);
 553         sel = (sel >> (dev_index << 2)) & 0xf;
 554
 555         if (sel == 0x6)
 556                 sclk = get_pll_clk(MPLL);
 557         else if (sel == 0x7)
 558                 sclk = get_pll_clk(EPLL);
 559         else if (sel == 0x8)
 560                 sclk = get_pll_clk(VPLL);
 561         else
 562                 return 0;
 563
 564         /*
 565          * CLK_DIV_PERIL0
 566          * UART0_RATIO [3:0]
 567          * UART1_RATIO [7:4]
 568          * UART2_RATIO [8:11]
 569          * UART3_RATIO [12:15]
 570          * UART4_RATIO [16:19]
 571          */
 572         ratio = readl(&clk->div_peril0);
 573         ratio = (ratio >> (dev_index << 2)) & 0xf;
 574
 575         uclk = sclk / (ratio + 1);
 576
 577         return uclk;
 578 }
 579
 580 /* exynos5: return uart clock frequency */
 581 static unsigned long exynos5_get_uart_clk(int dev_index)
 582 {
 583         struct exynos5_clock *clk =
 584                 (struct exynos5_clock *)samsung_get_base_clock();
 585         unsigned long uclk, sclk;
 586         unsigned int sel;
 587         unsigned int ratio;
 588
 589         /*
 590          * CLK_SRC_PERIC0
 591          * UART0_SEL [3:0]
 592          * UART1_SEL [7:4]
 593          * UART2_SEL [8:11]
 594          * UART3_SEL [12:15]
 595          * UART4_SEL [16:19]
 596          * UART5_SEL [23:20]
 597          */
 598         sel = readl(&clk->src_peric0);
 599         sel = (sel >> (dev_index << 2)) & 0xf;
 600
 601         if (sel == 0x6)
 602                 sclk = get_pll_clk(MPLL);
 603         else if (sel == 0x7)
 604                 sclk = get_pll_clk(EPLL);
 605         else if (sel == 0x8)
 606                 sclk = get_pll_clk(VPLL);
 607         else
 608                 return 0;
 609
 610         /*
 611          * CLK_DIV_PERIC0
 612          * UART0_RATIO [3:0]
 613          * UART1_RATIO [7:4]
 614          * UART2_RATIO [8:11]
 615          * UART3_RATIO [12:15]
 616          * UART4_RATIO [16:19]
 617          * UART5_RATIO [23:20]
 618          */
 619         ratio = readl(&clk->div_peric0);
 620         ratio = (ratio >> (dev_index << 2)) & 0xf;
 621
 622         uclk = sclk / (ratio + 1);
 623
 624         return uclk;
 625 }
 626
 627 static unsigned long exynos4_get_mmc_clk(int dev_index)
 628 {
 629         struct exynos4_clock *clk =
 630                 (struct exynos4_clock *)samsung_get_base_clock();
 631         unsigned long uclk, sclk;
 632         unsigned int sel, ratio, pre_ratio;
 633         int shift = 0;
 634
 635         sel = readl(&clk->src_fsys);
 636         sel = (sel >> (dev_index << 2)) & 0xf;
 637
 638         if (sel == 0x6)
 639                 sclk = get_pll_clk(MPLL);
 640         else if (sel == 0x7)
 641                 sclk = get_pll_clk(EPLL);
 642         else if (sel == 0x8)
 643                 sclk = get_pll_clk(VPLL);
 644         else
 645                 return 0;
 646
 647         switch (dev_index) {
 648         case 0:
 649         case 1:
 650                 ratio = readl(&clk->div_fsys1);
 651                 pre_ratio = readl(&clk->div_fsys1);
 652                 break;
 653         case 2:
 654         case 3:
 655                 ratio = readl(&clk->div_fsys2);
 656                 pre_ratio = readl(&clk->div_fsys2);
 657                 break;
 658         case 4:
 659                 ratio = readl(&clk->div_fsys3);
 660                 pre_ratio = readl(&clk->div_fsys3);
 661                 break;
 662         default:
 663                 return 0;
 664         }
 665
 666         if (dev_index == 1 || dev_index == 3)
 667                 shift = 16;
 668
 669         ratio = (ratio >> shift) & 0xf;
 670         pre_ratio = (pre_ratio >> (shift + 8)) & 0xff;
 671         uclk = (sclk / (ratio + 1)) / (pre_ratio + 1);
 672
 673         return uclk;
 674 }
 675
 676 static unsigned long exynos5_get_mmc_clk(int dev_index)
 677 {
 678         struct exynos5_clock *clk =
 679                 (struct exynos5_clock *)samsung_get_base_clock();
 680         unsigned long uclk, sclk;
 681         unsigned int sel, ratio, pre_ratio;
 682         int shift = 0;
 683
 684         sel = readl(&clk->src_fsys);
 685         sel = (sel >> (dev_index << 2)) & 0xf;
 686
 687         if (sel == 0x6)
 688                 sclk = get_pll_clk(MPLL);
 689         else if (sel == 0x7)
 690                 sclk = get_pll_clk(EPLL);
 691         else if (sel == 0x8)
 692                 sclk = get_pll_clk(VPLL);
 693         else
 694                 return 0;
 695
 696         switch (dev_index) {
 697         case 0:
 698         case 1:
 699                 ratio = readl(&clk->div_fsys1);
 700                 pre_ratio = readl(&clk->div_fsys1);
 701                 break;
 702         case 2:
 703         case 3:
 704                 ratio = readl(&clk->div_fsys2);
 705                 pre_ratio = readl(&clk->div_fsys2);
 706                 break;
 707         default:
 708                 return 0;
 709         }
 710
 711         if (dev_index == 1 || dev_index == 3)
 712                 shift = 16;
 713
 714         ratio = (ratio >> shift) & 0xf;
 715         pre_ratio = (pre_ratio >> (shift + 8)) & 0xff;
 716         uclk = (sclk / (ratio + 1)) / (pre_ratio + 1);
 717
 718         return uclk;
 719 }
 720
 721 /* exynos4: set the mmc clock */
 722 static void exynos4_set_mmc_clk(int dev_index, unsigned int div)
 723 {
 724         struct exynos4_clock *clk =
 725                 (struct exynos4_clock *)samsung_get_base_clock();
 726         unsigned int addr;
 727         unsigned int val;
 728
 729         /*
 730          * CLK_DIV_FSYS1
 731          * MMC0_PRE_RATIO [15:8], MMC1_PRE_RATIO [31:24]
 732          * CLK_DIV_FSYS2
 733          * MMC2_PRE_RATIO [15:8], MMC3_PRE_RATIO [31:24]
 734          * CLK_DIV_FSYS3
 735          * MMC4_PRE_RATIO [15:8]
 736          */
 737         if (dev_index < 2) {
 738                 addr = (unsigned int)&clk->div_fsys1;
 739         }  else if (dev_index == 4) {
 740                 addr = (unsigned int)&clk->div_fsys3;
 741                 dev_index -= 4;
 742         } else {
 743                 addr = (unsigned int)&clk->div_fsys2;
 744                 dev_index -= 2;
 745         }
 746
 747         val = readl(addr);
 748         val &= ~(0xff << ((dev_index << 4) + 8));
 749         val |= (div & 0xff) << ((dev_index << 4) + 8);
 750         writel(val, addr);
 751 }
 752
 753 /* exynos4x12: set the mmc clock */
 754 static void exynos4x12_set_mmc_clk(int dev_index, unsigned int div)
 755 {
 756         struct exynos4x12_clock *clk =
 757                 (struct exynos4x12_clock *)samsung_get_base_clock();
 758         unsigned int addr;
 759         unsigned int val;
 760
 761         /*
 762          * CLK_DIV_FSYS1
 763          * MMC0_PRE_RATIO [15:8], MMC1_PRE_RATIO [31:24]
 764          * CLK_DIV_FSYS2
 765          * MMC2_PRE_RATIO [15:8], MMC3_PRE_RATIO [31:24]
 766          */
 767         if (dev_index < 2) {
 768                 addr = (unsigned int)&clk->div_fsys1;
 769         } else {
 770                 addr = (unsigned int)&clk->div_fsys2;
 771                 dev_index -= 2;
 772         }
 773
 774         val = readl(addr);
 775         val &= ~(0xff << ((dev_index << 4) + 8));
 776         val |= (div & 0xff) << ((dev_index << 4) + 8);
 777         writel(val, addr);
 778 }
 779
 780 /* exynos5: set the mmc clock */
 781 static void exynos5_set_mmc_clk(int dev_index, unsigned int div)
 782 {
 783         struct exynos5_clock *clk =
 784                 (struct exynos5_clock *)samsung_get_base_clock();
 785         unsigned int addr;
 786         unsigned int val;
 787
 788         /*
 789          * CLK_DIV_FSYS1
 790          * MMC0_PRE_RATIO [15:8], MMC1_PRE_RATIO [31:24]
 791          * CLK_DIV_FSYS2
 792          * MMC2_PRE_RATIO [15:8], MMC3_PRE_RATIO [31:24]
 793          */
 794         if (dev_index < 2) {
 795                 addr = (unsigned int)&clk->div_fsys1;
 796         } else {
 797                 addr = (unsigned int)&clk->div_fsys2;
 798                 dev_index -= 2;
 799         }
 800
 801         val = readl(addr);
 802         val &= ~(0xff << ((dev_index << 4) + 8));
 803         val |= (div & 0xff) << ((dev_index << 4) + 8);
 804         writel(val, addr);
 805 }
 806
 807 /* get_lcd_clk: return lcd clock frequency */
 808 static unsigned long exynos4_get_lcd_clk(void)
 809 {
 810         struct exynos4_clock *clk =
 811                 (struct exynos4_clock *)samsung_get_base_clock();
 812         unsigned long pclk, sclk;
 813         unsigned int sel;
 814         unsigned int ratio;
 815
 816         /*
 817          * CLK_SRC_LCD0
 818          * FIMD0_SEL [3:0]
 819          */
 820         sel = readl(&clk->src_lcd0);
 821         sel = sel & 0xf;
 822
 823         /*
 824          * 0x6: SCLK_MPLL
 825          * 0x7: SCLK_EPLL
 826          * 0x8: SCLK_VPLL
 827          */
 828         if (sel == 0x6)
 829                 sclk = get_pll_clk(MPLL);
 830         else if (sel == 0x7)
 831                 sclk = get_pll_clk(EPLL);
 832         else if (sel == 0x8)
 833                 sclk = get_pll_clk(VPLL);
 834         else
 835                 return 0;
 836
 837         /*
 838          * CLK_DIV_LCD0
 839          * FIMD0_RATIO [3:0]
 840          */
 841         ratio = readl(&clk->div_lcd0);
 842         ratio = ratio & 0xf;
 843
 844         pclk = sclk / (ratio + 1);
 845
 846         return pclk;
 847 }
 848
 849 /* get_lcd_clk: return lcd clock frequency */
 850 static unsigned long exynos5_get_lcd_clk(void)
 851 {
 852         struct exynos5_clock *clk =
 853                 (struct exynos5_clock *)samsung_get_base_clock();
 854         unsigned long pclk, sclk;
 855         unsigned int sel;
 856         unsigned int ratio;
 857
 858         /*
 859          * CLK_SRC_LCD0
 860          * FIMD0_SEL [3:0]
 861          */
 862         sel = readl(&clk->src_disp1_0);
 863         sel = sel & 0xf;
 864
 865         /*
 866          * 0x6: SCLK_MPLL
 867          * 0x7: SCLK_EPLL
 868          * 0x8: SCLK_VPLL
 869          */
 870         if (sel == 0x6)
 871                 sclk = get_pll_clk(MPLL);
 872         else if (sel == 0x7)
 873                 sclk = get_pll_clk(EPLL);
 874         else if (sel == 0x8)
 875                 sclk = get_pll_clk(VPLL);
 876         else
 877                 return 0;
 878
 879         /*
 880          * CLK_DIV_LCD0
 881          * FIMD0_RATIO [3:0]
 882          */
 883         ratio = readl(&clk->div_disp1_0);
 884         ratio = ratio & 0xf;
 885
 886         pclk = sclk / (ratio + 1);
 887
 888         return pclk;
 889 }
 890
 891 void exynos4_set_lcd_clk(void)
 892 {
 893         struct exynos4_clock *clk =
 894             (struct exynos4_clock *)samsung_get_base_clock();
 895         unsigned int cfg = 0;
 896
 897         /*
 898          * CLK_GATE_BLOCK
 899          * CLK_CAM      [0]
 900          * CLK_TV       [1]
 901          * CLK_MFC      [2]
 902          * CLK_G3D      [3]
 903          * CLK_LCD0     [4]
 904          * CLK_LCD1     [5]
 905          * CLK_GPS      [7]
 906          */
 907         cfg = readl(&clk->gate_block);
 908         cfg |= 1 << 4;
 909         writel(cfg, &clk->gate_block);
 910
 911         /*
 912          * CLK_SRC_LCD0
 913          * FIMD0_SEL            [3:0]
 914          * MDNIE0_SEL           [7:4]
 915          * MDNIE_PWM0_SEL       [8:11]
 916          * MIPI0_SEL            [12:15]
 917          * set lcd0 src clock 0x6: SCLK_MPLL
 918          */
 919         cfg = readl(&clk->src_lcd0);
 920         cfg &= ~(0xf);
 921         cfg |= 0x6;
 922         writel(cfg, &clk->src_lcd0);
 923
 924         /*
 925          * CLK_GATE_IP_LCD0
 926          * CLK_FIMD0            [0]
 927          * CLK_MIE0             [1]
 928          * CLK_MDNIE0           [2]
 929          * CLK_DSIM0            [3]
 930          * CLK_SMMUFIMD0        [4]
 931          * CLK_PPMULCD0         [5]
 932          * Gating all clocks for FIMD0
 933          */
 934         cfg = readl(&clk->gate_ip_lcd0);
 935         cfg |= 1 << 0;
 936         writel(cfg, &clk->gate_ip_lcd0);
 937
 938         /*
 939          * CLK_DIV_LCD0
 940          * FIMD0_RATIO          [3:0]
 941          * MDNIE0_RATIO         [7:4]
 942          * MDNIE_PWM0_RATIO     [11:8]
 943          * MDNIE_PWM_PRE_RATIO  [15:12]
 944          * MIPI0_RATIO          [19:16]
 945          * MIPI0_PRE_RATIO      [23:20]
 946          * set fimd ratio
 947          */
 948         cfg &= ~(0xf);
 949         cfg |= 0x1;
 950         writel(cfg, &clk->div_lcd0);
 951 }
 952
 953 void exynos5_set_lcd_clk(void)
 954 {
 955         struct exynos5_clock *clk =
 956             (struct exynos5_clock *)samsung_get_base_clock();
 957         unsigned int cfg = 0;
 958
 959         /*
 960          * CLK_GATE_BLOCK
 961          * CLK_CAM      [0]
 962          * CLK_TV       [1]
 963          * CLK_MFC      [2]
 964          * CLK_G3D      [3]
 965          * CLK_LCD0     [4]
 966          * CLK_LCD1     [5]
 967          * CLK_GPS      [7]
 968          */
 969         cfg = readl(&clk->gate_block);
 970         cfg |= 1 << 4;
 971         writel(cfg, &clk->gate_block);
 972
 973         /*
 974          * CLK_SRC_LCD0
 975          * FIMD0_SEL            [3:0]
 976          * MDNIE0_SEL           [7:4]
 977          * MDNIE_PWM0_SEL       [8:11]
 978          * MIPI0_SEL            [12:15]
 979          * set lcd0 src clock 0x6: SCLK_MPLL
 980          */
 981         cfg = readl(&clk->src_disp1_0);
 982         cfg &= ~(0xf);
 983         cfg |= 0x6;
 984         writel(cfg, &clk->src_disp1_0);
 985
 986         /*
 987          * CLK_GATE_IP_LCD0
 988          * CLK_FIMD0            [0]
 989          * CLK_MIE0             [1]
 990          * CLK_MDNIE0           [2]
 991          * CLK_DSIM0            [3]
 992          * CLK_SMMUFIMD0        [4]
 993          * CLK_PPMULCD0         [5]
 994          * Gating all clocks for FIMD0
 995          */
 996         cfg = readl(&clk->gate_ip_disp1);
 997         cfg |= 1 << 0;
 998         writel(cfg, &clk->gate_ip_disp1);
 999
1000         /*
1001          * CLK_DIV_LCD0
1002          * FIMD0_RATIO          [3:0]
1003          * MDNIE0_RATIO         [7:4]
1004          * MDNIE_PWM0_RATIO     [11:8]
1005          * MDNIE_PWM_PRE_RATIO  [15:12]
1006          * MIPI0_RATIO          [19:16]
1007          * MIPI0_PRE_RATIO      [23:20]
1008          * set fimd ratio
1009          */
1010         cfg &= ~(0xf);
1011         cfg |= 0x0;
1012         writel(cfg, &clk->div_disp1_0);
1013 }
1014
1015 void exynos4_set_mipi_clk(void)
1016 {
1017         struct exynos4_clock *clk =
1018             (struct exynos4_clock *)samsung_get_base_clock();
1019         unsigned int cfg = 0;
1020
1021         /*
1022          * CLK_SRC_LCD0
1023          * FIMD0_SEL            [3:0]
1024          * MDNIE0_SEL           [7:4]
1025          * MDNIE_PWM0_SEL       [8:11]
1026          * MIPI0_SEL            [12:15]
1027          * set mipi0 src clock 0x6: SCLK_MPLL
1028          */
1029         cfg = readl(&clk->src_lcd0);
1030         cfg &= ~(0xf << 12);
1031         cfg |= (0x6 << 12);
1032         writel(cfg, &clk->src_lcd0);
1033
1034         /*
1035          * CLK_SRC_MASK_LCD0
1036          * FIMD0_MASK           [0]
1037          * MDNIE0_MASK          [4]
1038          * MDNIE_PWM0_MASK      [8]
1039          * MIPI0_MASK           [12]
1040          * set src mask mipi0 0x1: Unmask
1041          */
1042         cfg = readl(&clk->src_mask_lcd0);
1043         cfg |= (0x1 << 12);
1044         writel(cfg, &clk->src_mask_lcd0);
1045
1046         /*
1047          * CLK_GATE_IP_LCD0
1048          * CLK_FIMD0            [0]
1049          * CLK_MIE0             [1]
1050          * CLK_MDNIE0           [2]
1051          * CLK_DSIM0            [3]
1052          * CLK_SMMUFIMD0        [4]
1053          * CLK_PPMULCD0         [5]
1054          * Gating all clocks for MIPI0
1055          */
1056         cfg = readl(&clk->gate_ip_lcd0);
1057         cfg |= 1 << 3;
1058         writel(cfg, &clk->gate_ip_lcd0);
1059
1060         /*
1061          * CLK_DIV_LCD0
1062          * FIMD0_RATIO          [3:0]
1063          * MDNIE0_RATIO         [7:4]
1064          * MDNIE_PWM0_RATIO     [11:8]
1065          * MDNIE_PWM_PRE_RATIO  [15:12]
1066          * MIPI0_RATIO          [19:16]
1067          * MIPI0_PRE_RATIO      [23:20]
1068          * set mipi ratio
1069          */
1070         cfg &= ~(0xf << 16);
1071         cfg |= (0x1 << 16);
1072         writel(cfg, &clk->div_lcd0);
1073 }
1074
1075 /*
1076  * I2C
1077  *
1078  * exynos5: obtaining the I2C clock
1079  */
1080 static unsigned long exynos5_get_i2c_clk(void)
1081 {
1082         struct exynos5_clock *clk =
1083                 (struct exynos5_clock *)samsung_get_base_clock();
1084         unsigned long aclk_66, aclk_66_pre, sclk;
1085         unsigned int ratio;
1086
1087         sclk = get_pll_clk(MPLL);
1088
1089         ratio = (readl(&clk->div_top1)) >> 24;
1090         ratio &= 0x7;
1091         aclk_66_pre = sclk / (ratio + 1);
1092         ratio = readl(&clk->div_top0);
1093         ratio &= 0x7;
1094         aclk_66 = aclk_66_pre / (ratio + 1);
1095         return aclk_66;
1096 }
1097
1098 int exynos5_set_epll_clk(unsigned long rate)
1099 {
1100         unsigned int epll_con, epll_con_k;
1101         unsigned int i;
1102         unsigned int lockcnt;
1103         unsigned int start;
1104         struct exynos5_clock *clk =
1105                 (struct exynos5_clock *)samsung_get_base_clock();
1106
1107         epll_con = readl(&clk->epll_con0);
1108         epll_con &= ~((EPLL_CON0_LOCK_DET_EN_MASK <<
1109                         EPLL_CON0_LOCK_DET_EN_SHIFT) |
1110                 EPLL_CON0_MDIV_MASK << EPLL_CON0_MDIV_SHIFT |
1111                 EPLL_CON0_PDIV_MASK << EPLL_CON0_PDIV_SHIFT |
1112                 EPLL_CON0_SDIV_MASK << EPLL_CON0_SDIV_SHIFT);
1113
1114         for (i = 0; i < ARRAY_SIZE(exynos5_epll_div); i++) {
1115                 if (exynos5_epll_div[i].freq_out == rate)
1116                         break;
1117         }
1118
1119         if (i == ARRAY_SIZE(exynos5_epll_div))
1120                 return -1;
1121
1122         epll_con_k = exynos5_epll_div[i].k_dsm << 0;
1123         epll_con |= exynos5_epll_div[i].en_lock_det <<
1124                                 EPLL_CON0_LOCK_DET_EN_SHIFT;
1125         epll_con |= exynos5_epll_div[i].m_div << EPLL_CON0_MDIV_SHIFT;
1126         epll_con |= exynos5_epll_div[i].p_div << EPLL_CON0_PDIV_SHIFT;
1127         epll_con |= exynos5_epll_div[i].s_div << EPLL_CON0_SDIV_SHIFT;
1128
1129         /*
1130          * Required period ( in cycles) to genarate a stable clock output.
1131          * The maximum clock time can be up to 3000 * PDIV cycles of PLLs
1132          * frequency input (as per spec)
1133          */
1134         lockcnt = 3000 * exynos5_epll_div[i].p_div;
1135
1136         writel(lockcnt, &clk->epll_lock);
1137         writel(epll_con, &clk->epll_con0);
1138         writel(epll_con_k, &clk->epll_con1);
1139
1140         start = get_timer(0);
1141
1142          while (!(readl(&clk->epll_con0) &
1143                         (0x1 << EXYNOS5_EPLLCON0_LOCKED_SHIFT))) {
1144                 if (get_timer(start) > TIMEOUT_EPLL_LOCK) {
1145                         debug("%s: Timeout waiting for EPLL lock\n", __func__);
1146                         return -1;
1147                 }
1148         }
1149         return 0;
1150 }
1151
1152 int exynos5_set_i2s_clk_source(unsigned int i2s_id)
1153 {
1154         struct exynos5_clock *clk =
1155                 (struct exynos5_clock *)samsung_get_base_clock();
1156         unsigned int *audio_ass = (unsigned int *)samsung_get_base_audio_ass();
1157
1158         if (i2s_id == 0) {
1159                 setbits_le32(&clk->src_top2, CLK_SRC_MOUT_EPLL);
1160                 clrsetbits_le32(&clk->src_mau, AUDIO0_SEL_MASK,
1161                                 (CLK_SRC_SCLK_EPLL));
1162                 setbits_le32(audio_ass, AUDIO_CLKMUX_ASS);
1163         } else if (i2s_id == 1) {
1164                 clrsetbits_le32(&clk->src_peric1, AUDIO1_SEL_MASK,
1165                                 (CLK_SRC_SCLK_EPLL));
1166         } else {
1167                 return -1;
1168         }
1169         return 0;
1170 }
1171
1172 int exynos5_set_i2s_clk_prescaler(unsigned int src_frq,
1173                                   unsigned int dst_frq,
1174                                   unsigned int i2s_id)
1175 {
1176         struct exynos5_clock *clk =
1177                 (struct exynos5_clock *)samsung_get_base_clock();
1178         unsigned int div;
1179
1180         if ((dst_frq == 0) || (src_frq == 0)) {
1181                 debug("%s: Invalid requency input for prescaler\n", __func__);
1182                 debug("src frq = %d des frq = %d ", src_frq, dst_frq);
1183                 return -1;
1184         }
1185
1186         div = (src_frq / dst_frq);
1187         if (i2s_id == 0) {
1188                 if (div > AUDIO_0_RATIO_MASK) {
1189                         debug("%s: Frequency ratio is out of range\n",
1190                               __func__);
1191                         debug("src frq = %d des frq = %d ", src_frq, dst_frq);
1192                         return -1;
1193                 }
1194                 clrsetbits_le32(&clk->div_mau, AUDIO_0_RATIO_MASK,
1195                                 (div & AUDIO_0_RATIO_MASK));
1196         } else if(i2s_id == 1) {
1197                 if (div > AUDIO_1_RATIO_MASK) {
1198                         debug("%s: Frequency ratio is out of range\n",
1199                               __func__);
1200                         debug("src frq = %d des frq = %d ", src_frq, dst_frq);
1201                         return -1;
1202                 }
1203                 clrsetbits_le32(&clk->div_peric4, AUDIO_1_RATIO_MASK,
1204                                 (div & AUDIO_1_RATIO_MASK));
1205         } else {
1206                 return -1;
1207         }
1208         return 0;
1209 }
1210
1211 /**
1212  * Linearly searches for the most accurate main and fine stage clock scalars
1213  * (divisors) for a specified target frequency and scalar bit sizes by checking
1214  * all multiples of main_scalar_bits values. Will always return scalars up to or
1215  * slower than target.
1216  *
1217  * @param main_scalar_bits      Number of main scalar bits, must be > 0 and < 32
1218  * @param fine_scalar_bits      Number of fine scalar bits, must be > 0 and < 32
1219  * @param input_freq            Clock frequency to be scaled in Hz
1220  * @param target_freq           Desired clock frequency in Hz
1221  * @param best_fine_scalar      Pointer to store the fine stage divisor
1222  *
1223  * @return best_main_scalar     Main scalar for desired frequency or -1 if none
1224  * found
1225  */
1226 static int clock_calc_best_scalar(unsigned int main_scaler_bits,
1227         unsigned int fine_scalar_bits, unsigned int input_rate,
1228         unsigned int target_rate, unsigned int *best_fine_scalar)
1229 {
1230         int i;
1231         int best_main_scalar = -1;
1232         unsigned int best_error = target_rate;
1233         const unsigned int cap = (1 << fine_scalar_bits) - 1;
1234         const unsigned int loops = 1 << main_scaler_bits;
1235
1236         debug("Input Rate is %u, Target is %u, Cap is %u\n", input_rate,
1237                         target_rate, cap);
1238
1239         assert(best_fine_scalar != NULL);
1240         assert(main_scaler_bits <= fine_scalar_bits);
1241
1242         *best_fine_scalar = 1;
1243
1244         if (input_rate == 0 || target_rate == 0)
1245                 return -1;
1246
1247         if (target_rate >= input_rate)
1248                 return 1;
1249
1250         for (i = 1; i <= loops; i++) {
1251                 const unsigned int effective_div = max(min(input_rate / i /
1252                                                         target_rate, cap), 1);
1253                 const unsigned int effective_rate = input_rate / i /
1254                                                         effective_div;
1255                 const int error = target_rate - effective_rate;
1256
1257                 debug("%d|effdiv:%u, effrate:%u, error:%d\n", i, effective_div,
1258                                 effective_rate, error);
1259
1260                 if (error >= 0 && error <= best_error) {
1261                         best_error = error;
1262                         best_main_scalar = i;
1263                         *best_fine_scalar = effective_div;
1264                 }
1265         }
1266
1267         return best_main_scalar;
1268 }
1269
1270 static int exynos5_set_spi_clk(enum periph_id periph_id,
1271                                         unsigned int rate)
1272 {
1273         struct exynos5_clock *clk =
1274                 (struct exynos5_clock *)samsung_get_base_clock();
1275         int main;
1276         unsigned int fine;
1277         unsigned shift, pre_shift;
1278         unsigned mask = 0xff;
1279         u32 *reg;
1280
1281         main = clock_calc_best_scalar(4, 8, 400000000, rate, &fine);
1282         if (main < 0) {
1283                 debug("%s: Cannot set clock rate for periph %d",
1284                                 __func__, periph_id);
1285                 return -1;
1286         }
1287         main = main - 1;
1288         fine = fine - 1;
1289
1290         switch (periph_id) {
1291         case PERIPH_ID_SPI0:
1292                 reg = &clk->div_peric1;
1293                 shift = 0;
1294                 pre_shift = 8;
1295                 break;
1296         case PERIPH_ID_SPI1:
1297                 reg = &clk->div_peric1;
1298                 shift = 16;
1299                 pre_shift = 24;
1300                 break;
1301         case PERIPH_ID_SPI2:
1302                 reg = &clk->div_peric2;
1303                 shift = 0;
1304                 pre_shift = 8;
1305                 break;
1306         case PERIPH_ID_SPI3:
1307                 reg = &clk->sclk_div_isp;
1308                 shift = 0;
1309                 pre_shift = 4;
1310                 break;
1311         case PERIPH_ID_SPI4:
1312                 reg = &clk->sclk_div_isp;
1313                 shift = 12;
1314                 pre_shift = 16;
1315                 break;
1316         default:
1317                 debug("%s: Unsupported peripheral ID %d\n", __func__,
1318                       periph_id);
1319                 return -1;
1320         }
1321         clrsetbits_le32(reg, mask << shift, (main & mask) << shift);
1322         clrsetbits_le32(reg, mask << pre_shift, (fine & mask) << pre_shift);
1323
1324         return 0;
1325 }
1326
1327 static unsigned long exynos4_get_i2c_clk(void)
1328 {
1329         struct exynos4_clock *clk =
1330                 (struct exynos4_clock *)samsung_get_base_clock();
1331         unsigned long sclk, aclk_100;
1332         unsigned int ratio;
1333
1334         sclk = get_pll_clk(APLL);
1335
1336         ratio = (readl(&clk->div_top)) >> 4;
1337         ratio &= 0xf;
1338         aclk_100 = sclk / (ratio + 1);
1339         return aclk_100;
1340 }
1341
1342 unsigned long get_pll_clk(int pllreg)
1343 {
1344         if (cpu_is_exynos5())
1345                 return exynos5_get_pll_clk(pllreg);
1346         else {
1347                 if (proid_is_exynos4412())
1348                         return exynos4x12_get_pll_clk(pllreg);
1349                 return exynos4_get_pll_clk(pllreg);
1350         }
1351 }
1352
1353 unsigned long get_arm_clk(void)
1354 {
1355         if (cpu_is_exynos5())
1356                 return exynos5_get_arm_clk();
1357         else {
1358                 if (proid_is_exynos4412())
1359                         return exynos4x12_get_arm_clk();
1360                 return exynos4_get_arm_clk();
1361         }
1362 }
1363
1364 unsigned long get_i2c_clk(void)
1365 {
1366         if (cpu_is_exynos5()) {
1367                 return exynos5_get_i2c_clk();
1368         } else if (cpu_is_exynos4()) {
1369                 return exynos4_get_i2c_clk();
1370         } else {
1371                 debug("I2C clock is not set for this CPU\n");
1372                 return 0;
1373         }
1374 }
1375
1376 unsigned long get_pwm_clk(void)
1377 {
1378         if (cpu_is_exynos5())
1379                 return clock_get_periph_rate(PERIPH_ID_PWM0);
1380         else {
1381                 if (proid_is_exynos4412())
1382                         return exynos4x12_get_pwm_clk();
1383                 return exynos4_get_pwm_clk();
1384         }
1385 }
1386
1387 unsigned long get_uart_clk(int dev_index)
1388 {
1389         if (cpu_is_exynos5())
1390                 return exynos5_get_uart_clk(dev_index);
1391         else {
1392                 if (proid_is_exynos4412())
1393                         return exynos4x12_get_uart_clk(dev_index);
1394                 return exynos4_get_uart_clk(dev_index);
1395         }
1396 }
1397
1398 unsigned long get_mmc_clk(int dev_index)
1399 {
1400         if (cpu_is_exynos5())
1401                 return exynos5_get_mmc_clk(dev_index);
1402         else
1403                 return exynos4_get_mmc_clk(dev_index);
1404 }
1405
1406 void set_mmc_clk(int dev_index, unsigned int div)
1407 {
1408         if (cpu_is_exynos5())
1409                 exynos5_set_mmc_clk(dev_index, div);
1410         else {
1411                 if (proid_is_exynos4412())
1412                         exynos4x12_set_mmc_clk(dev_index, div);
1413                 exynos4_set_mmc_clk(dev_index, div);
1414         }
1415 }
1416
1417 unsigned long get_lcd_clk(void)
1418 {
1419         if (cpu_is_exynos4())
1420                 return exynos4_get_lcd_clk();
1421         else
1422                 return exynos5_get_lcd_clk();
1423 }
1424
1425 void set_lcd_clk(void)
1426 {
1427         if (cpu_is_exynos4())
1428                 exynos4_set_lcd_clk();
1429         else
1430                 exynos5_set_lcd_clk();
1431 }
1432
1433 void set_mipi_clk(void)
1434 {
1435         if (cpu_is_exynos4())
1436                 exynos4_set_mipi_clk();
1437 }
1438
1439 int set_spi_clk(int periph_id, unsigned int rate)
1440 {
1441         if (cpu_is_exynos5())
1442                 return exynos5_set_spi_clk(periph_id, rate);
1443         else
1444                 return 0;
1445 }
1446
1447 int set_i2s_clk_prescaler(unsigned int src_frq, unsigned int dst_frq,
1448                           unsigned int i2s_id)
1449 {
1450         if (cpu_is_exynos5())
1451                 return exynos5_set_i2s_clk_prescaler(src_frq, dst_frq, i2s_id);
1452         else
1453                 return 0;
1454 }
1455
1456 int set_i2s_clk_source(unsigned int i2s_id)
1457 {
1458         if (cpu_is_exynos5())
1459                 return exynos5_set_i2s_clk_source(i2s_id);
1460         else
1461                 return 0;
1462 }
1463
1464 int set_epll_clk(unsigned long rate)
1465 {
1466         if (cpu_is_exynos5())
1467                 return exynos5_set_epll_clk(rate);
1468         else
1469                 return 0;
1470 }