arch/arm/mach-imx/imx8m/clock_imx8mm.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright 2018-2019 NXP
   4  *
   5  * Peng Fan <[email protected]>
   6  */
   7
   8 #include <common.h>
   9 #include <asm/arch/clock.h>
  10 #include <asm/arch/imx-regs.h>
  11 #include <asm/arch/sys_proto.h>
  12 #include <asm/io.h>
  13 #include <div64.h>
  14 #include <errno.h>
  15
  16 DECLARE_GLOBAL_DATA_PTR;
  17
  18 static struct anamix_pll *ana_pll = (struct anamix_pll *)ANATOP_BASE_ADDR;
  19
  20 void enable_ocotp_clk(unsigned char enable)
  21 {
  22         clock_enable(CCGR_OCOTP, !!enable);
  23 }
  24
  25 int enable_i2c_clk(unsigned char enable, unsigned i2c_num)
  26 {
  27         /* 0 - 3 is valid i2c num */
  28         if (i2c_num > 3)
  29                 return -EINVAL;
  30
  31         clock_enable(CCGR_I2C1 + i2c_num, !!enable);
  32
  33         return 0;
  34 }
  35
  36 #ifdef CONFIG_SPL_BUILD
  37 static struct imx_int_pll_rate_table imx8mm_fracpll_tbl[] = {
  38         PLL_1443X_RATE(1000000000U, 250, 3, 1, 0),
  39         PLL_1443X_RATE(800000000U, 300, 9, 0, 0),
  40         PLL_1443X_RATE(750000000U, 250, 8, 0, 0),
  41         PLL_1443X_RATE(650000000U, 325, 3, 2, 0),
  42         PLL_1443X_RATE(600000000U, 300, 3, 2, 0),
  43         PLL_1443X_RATE(594000000U, 99, 1, 2, 0),
  44         PLL_1443X_RATE(400000000U, 300, 9, 1, 0),
  45         PLL_1443X_RATE(266666667U, 400, 9, 2, 0),
  46         PLL_1443X_RATE(167000000U, 334, 3, 4, 0),
  47         PLL_1443X_RATE(100000000U, 300, 9, 3, 0),
  48 };
  49
  50 static int fracpll_configure(enum pll_clocks pll, u32 freq)
  51 {
  52         int i;
  53         u32 tmp, div_val;
  54         void *pll_base;
  55         struct imx_int_pll_rate_table *rate;
  56
  57         for (i = 0; i < ARRAY_SIZE(imx8mm_fracpll_tbl); i++) {
  58                 if (freq == imx8mm_fracpll_tbl[i].rate)
  59                         break;
  60         }
  61
  62         if (i == ARRAY_SIZE(imx8mm_fracpll_tbl)) {
  63                 printf("No matched freq table %u\n", freq);
  64                 return -EINVAL;
  65         }
  66
  67         rate = &imx8mm_fracpll_tbl[i];
  68
  69         switch (pll) {
  70         case ANATOP_DRAM_PLL:
  71                 setbits_le32(GPC_BASE_ADDR + 0xEC, 1 << 7);
  72                 setbits_le32(GPC_BASE_ADDR + 0xF8, 1 << 5);
  73                 writel(SRC_DDR1_ENABLE_MASK, SRC_BASE_ADDR + 0x1004);
  74
  75                 pll_base = &ana_pll->dram_pll_gnrl_ctl;
  76                 break;
  77         case ANATOP_VIDEO_PLL:
  78                 pll_base = &ana_pll->video_pll1_gnrl_ctl;
  79                 break;
  80         default:
  81                 return 0;
  82         }
  83         /* Bypass clock and set lock to pll output lock */
  84         tmp = readl(pll_base);
  85         tmp |= BYPASS_MASK;
  86         writel(tmp, pll_base);
  87
  88         /* Enable RST */
  89         tmp &= ~RST_MASK;
  90         writel(tmp, pll_base);
  91
  92         div_val = (rate->mdiv << MDIV_SHIFT) | (rate->pdiv << PDIV_SHIFT) |
  93                 (rate->sdiv << SDIV_SHIFT);
  94         writel(div_val, pll_base + 4);
  95         writel(rate->kdiv << KDIV_SHIFT, pll_base + 8);
  96
  97         __udelay(100);
  98
  99         /* Disable RST */
 100         tmp |= RST_MASK;
 101         writel(tmp, pll_base);
 102
 103         /* Wait Lock*/
 104         while (!(readl(pll_base) & LOCK_STATUS))
 105                 ;
 106
 107         /* Bypass */
 108         tmp &= ~BYPASS_MASK;
 109         writel(tmp, pll_base);
 110
 111         return 0;
 112 }
 113
 114 void dram_pll_init(ulong pll_val)
 115 {
 116         fracpll_configure(ANATOP_DRAM_PLL, pll_val);
 117 }
 118
 119 static struct dram_bypass_clk_setting imx8mm_dram_bypass_tbl[] = {
 120         DRAM_BYPASS_ROOT_CONFIG(MHZ(100), 2, CLK_ROOT_PRE_DIV1, 2,
 121                                 CLK_ROOT_PRE_DIV2),
 122         DRAM_BYPASS_ROOT_CONFIG(MHZ(250), 3, CLK_ROOT_PRE_DIV2, 2,
 123                                 CLK_ROOT_PRE_DIV2),
 124         DRAM_BYPASS_ROOT_CONFIG(MHZ(400), 1, CLK_ROOT_PRE_DIV2, 3,
 125                                 CLK_ROOT_PRE_DIV2),
 126 };
 127
 128 void dram_enable_bypass(ulong clk_val)
 129 {
 130         int i;
 131         struct dram_bypass_clk_setting *config;
 132
 133         for (i = 0; i < ARRAY_SIZE(imx8mm_dram_bypass_tbl); i++) {
 134                 if (clk_val == imx8mm_dram_bypass_tbl[i].clk)
 135                         break;
 136         }
 137
 138         if (i == ARRAY_SIZE(imx8mm_dram_bypass_tbl)) {
 139                 printf("No matched freq table %lu\n", clk_val);
 140                 return;
 141         }
 142
 143         config = &imx8mm_dram_bypass_tbl[i];
 144
 145         clock_set_target_val(DRAM_ALT_CLK_ROOT, CLK_ROOT_ON |
 146                              CLK_ROOT_SOURCE_SEL(config->alt_root_sel) |
 147                              CLK_ROOT_PRE_DIV(config->alt_pre_div));
 148         clock_set_target_val(DRAM_APB_CLK_ROOT, CLK_ROOT_ON |
 149                              CLK_ROOT_SOURCE_SEL(config->apb_root_sel) |
 150                              CLK_ROOT_PRE_DIV(config->apb_pre_div));
 151         clock_set_target_val(DRAM_SEL_CFG, CLK_ROOT_ON |
 152                              CLK_ROOT_SOURCE_SEL(1));
 153 }
 154
 155 void dram_disable_bypass(void)
 156 {
 157         clock_set_target_val(DRAM_SEL_CFG, CLK_ROOT_ON |
 158                              CLK_ROOT_SOURCE_SEL(0));
 159         clock_set_target_val(DRAM_APB_CLK_ROOT, CLK_ROOT_ON |
 160                              CLK_ROOT_SOURCE_SEL(4) |
 161                              CLK_ROOT_PRE_DIV(CLK_ROOT_PRE_DIV5));
 162 }
 163 #endif
 164
 165 void init_uart_clk(u32 index)
 166 {
 167         /*
 168          * set uart clock root
 169          * 24M OSC
 170          */
 171         switch (index) {
 172         case 0:
 173                 clock_enable(CCGR_UART1, 0);
 174                 clock_set_target_val(UART1_CLK_ROOT, CLK_ROOT_ON |
 175                                      CLK_ROOT_SOURCE_SEL(0));
 176                 clock_enable(CCGR_UART1, 1);
 177                 return;
 178         case 1:
 179                 clock_enable(CCGR_UART2, 0);
 180                 clock_set_target_val(UART2_CLK_ROOT, CLK_ROOT_ON |
 181                                      CLK_ROOT_SOURCE_SEL(0));
 182                 clock_enable(CCGR_UART2, 1);
 183                 return;
 184         case 2:
 185                 clock_enable(CCGR_UART3, 0);
 186                 clock_set_target_val(UART3_CLK_ROOT, CLK_ROOT_ON |
 187                                      CLK_ROOT_SOURCE_SEL(0));
 188                 clock_enable(CCGR_UART3, 1);
 189                 return;
 190         case 3:
 191                 clock_enable(CCGR_UART4, 0);
 192                 clock_set_target_val(UART4_CLK_ROOT, CLK_ROOT_ON |
 193                                      CLK_ROOT_SOURCE_SEL(0));
 194                 clock_enable(CCGR_UART4, 1);
 195                 return;
 196         default:
 197                 printf("Invalid uart index\n");
 198                 return;
 199         }
 200 }
 201
 202 void init_wdog_clk(void)
 203 {
 204         clock_enable(CCGR_WDOG1, 0);
 205         clock_enable(CCGR_WDOG2, 0);
 206         clock_enable(CCGR_WDOG3, 0);
 207         clock_set_target_val(WDOG_CLK_ROOT, CLK_ROOT_ON |
 208                              CLK_ROOT_SOURCE_SEL(0));
 209         clock_enable(CCGR_WDOG1, 1);
 210         clock_enable(CCGR_WDOG2, 1);
 211         clock_enable(CCGR_WDOG3, 1);
 212 }
 213
 214 int clock_init(void)
 215 {
 216         u32 val_cfg0;
 217
 218         /*
 219          * The gate is not exported to clk tree, so configure them here.
 220          * According to ANAMIX SPEC
 221          * sys pll1 fixed at 800MHz
 222          * sys pll2 fixed at 1GHz
 223          * Here we only enable the outputs.
 224          */
 225         val_cfg0 = readl(&ana_pll->sys_pll1_gnrl_ctl);
 226         val_cfg0 |= INTPLL_CLKE_MASK | INTPLL_DIV2_CLKE_MASK |
 227                 INTPLL_DIV3_CLKE_MASK | INTPLL_DIV4_CLKE_MASK |
 228                 INTPLL_DIV5_CLKE_MASK | INTPLL_DIV6_CLKE_MASK |
 229                 INTPLL_DIV8_CLKE_MASK | INTPLL_DIV10_CLKE_MASK |
 230                 INTPLL_DIV20_CLKE_MASK;
 231         writel(val_cfg0, &ana_pll->sys_pll1_gnrl_ctl);
 232
 233         val_cfg0 = readl(&ana_pll->sys_pll2_gnrl_ctl);
 234         val_cfg0 |= INTPLL_CLKE_MASK | INTPLL_DIV2_CLKE_MASK |
 235                 INTPLL_DIV3_CLKE_MASK | INTPLL_DIV4_CLKE_MASK |
 236                 INTPLL_DIV5_CLKE_MASK | INTPLL_DIV6_CLKE_MASK |
 237                 INTPLL_DIV8_CLKE_MASK | INTPLL_DIV10_CLKE_MASK |
 238                 INTPLL_DIV20_CLKE_MASK;
 239         writel(val_cfg0, &ana_pll->sys_pll2_gnrl_ctl);
 240
 241         /* config GIC to sys_pll2_100m */
 242         clock_enable(CCGR_GIC, 0);
 243         clock_set_target_val(GIC_CLK_ROOT, CLK_ROOT_ON |
 244                              CLK_ROOT_SOURCE_SEL(3));
 245         clock_enable(CCGR_GIC, 1);
 246
 247         clock_set_target_val(NAND_USDHC_BUS_CLK_ROOT, CLK_ROOT_ON |
 248                              CLK_ROOT_SOURCE_SEL(1));
 249
 250         clock_enable(CCGR_DDR1, 0);
 251         clock_set_target_val(DRAM_ALT_CLK_ROOT, CLK_ROOT_ON |
 252                              CLK_ROOT_SOURCE_SEL(1));
 253         clock_set_target_val(DRAM_APB_CLK_ROOT, CLK_ROOT_ON |
 254                              CLK_ROOT_SOURCE_SEL(1));
 255         clock_enable(CCGR_DDR1, 1);
 256
 257         init_wdog_clk();
 258
 259         clock_enable(CCGR_TEMP_SENSOR, 1);
 260
 261         clock_enable(CCGR_SEC_DEBUG, 1);
 262
 263         return 0;
 264 };
 265
 266 u32 imx_get_uartclk(void)
 267 {
 268         return 24000000U;
 269 }
 270
 271 static u32 decode_intpll(enum clk_root_src intpll)
 272 {
 273         u32 pll_gnrl_ctl, pll_div_ctl, pll_clke_mask;
 274         u32 main_div, pre_div, post_div, div;
 275         u64 freq;
 276
 277         switch (intpll) {
 278         case ARM_PLL_CLK:
 279                 pll_gnrl_ctl = readl(&ana_pll->arm_pll_gnrl_ctl);
 280                 pll_div_ctl = readl(&ana_pll->arm_pll_div_ctl);
 281                 break;
 282         case GPU_PLL_CLK:
 283                 pll_gnrl_ctl = readl(&ana_pll->gpu_pll_gnrl_ctl);
 284                 pll_div_ctl = readl(&ana_pll->gpu_pll_div_ctl);
 285                 break;
 286         case VPU_PLL_CLK:
 287                 pll_gnrl_ctl = readl(&ana_pll->vpu_pll_gnrl_ctl);
 288                 pll_div_ctl = readl(&ana_pll->vpu_pll_div_ctl);
 289                 break;
 290         case SYSTEM_PLL1_800M_CLK:
 291         case SYSTEM_PLL1_400M_CLK:
 292         case SYSTEM_PLL1_266M_CLK:
 293         case SYSTEM_PLL1_200M_CLK:
 294         case SYSTEM_PLL1_160M_CLK:
 295         case SYSTEM_PLL1_133M_CLK:
 296         case SYSTEM_PLL1_100M_CLK:
 297         case SYSTEM_PLL1_80M_CLK:
 298         case SYSTEM_PLL1_40M_CLK:
 299                 pll_gnrl_ctl = readl(&ana_pll->sys_pll1_gnrl_ctl);
 300                 pll_div_ctl = readl(&ana_pll->sys_pll1_div_ctl);
 301                 break;
 302         case SYSTEM_PLL2_1000M_CLK:
 303         case SYSTEM_PLL2_500M_CLK:
 304         case SYSTEM_PLL2_333M_CLK:
 305         case SYSTEM_PLL2_250M_CLK:
 306         case SYSTEM_PLL2_200M_CLK:
 307         case SYSTEM_PLL2_166M_CLK:
 308         case SYSTEM_PLL2_125M_CLK:
 309         case SYSTEM_PLL2_100M_CLK:
 310         case SYSTEM_PLL2_50M_CLK:
 311                 pll_gnrl_ctl = readl(&ana_pll->sys_pll2_gnrl_ctl);
 312                 pll_div_ctl = readl(&ana_pll->sys_pll2_div_ctl);
 313                 break;
 314         case SYSTEM_PLL3_CLK:
 315                 pll_gnrl_ctl = readl(&ana_pll->sys_pll3_gnrl_ctl);
 316                 pll_div_ctl = readl(&ana_pll->sys_pll3_div_ctl);
 317                 break;
 318         default:
 319                 return -EINVAL;
 320         }
 321
 322         /* Only support SYS_XTAL 24M, PAD_CLK not take into consideration */
 323         if ((pll_gnrl_ctl & INTPLL_REF_CLK_SEL_MASK) != 0)
 324                 return 0;
 325
 326         if ((pll_gnrl_ctl & INTPLL_RST_MASK) == 0)
 327                 return 0;
 328
 329         /*
 330          * When BYPASS is equal to 1, PLL enters the bypass mode
 331          * regardless of the values of RESETB
 332          */
 333         if (pll_gnrl_ctl & INTPLL_BYPASS_MASK)
 334                 return 24000000u;
 335
 336         if (!(pll_gnrl_ctl & INTPLL_LOCK_MASK)) {
 337                 puts("pll not locked\n");
 338                 return 0;
 339         }
 340
 341         switch (intpll) {
 342         case ARM_PLL_CLK:
 343         case GPU_PLL_CLK:
 344         case VPU_PLL_CLK:
 345         case SYSTEM_PLL3_CLK:
 346         case SYSTEM_PLL1_800M_CLK:
 347         case SYSTEM_PLL2_1000M_CLK:
 348                 pll_clke_mask = INTPLL_CLKE_MASK;
 349                 div = 1;
 350                 break;
 351
 352         case SYSTEM_PLL1_400M_CLK:
 353         case SYSTEM_PLL2_500M_CLK:
 354                 pll_clke_mask = INTPLL_DIV2_CLKE_MASK;
 355                 div = 2;
 356                 break;
 357
 358         case SYSTEM_PLL1_266M_CLK:
 359         case SYSTEM_PLL2_333M_CLK:
 360                 pll_clke_mask = INTPLL_DIV3_CLKE_MASK;
 361                 div = 3;
 362                 break;
 363
 364         case SYSTEM_PLL1_200M_CLK:
 365         case SYSTEM_PLL2_250M_CLK:
 366                 pll_clke_mask = INTPLL_DIV4_CLKE_MASK;
 367                 div = 4;
 368                 break;
 369
 370         case SYSTEM_PLL1_160M_CLK:
 371         case SYSTEM_PLL2_200M_CLK:
 372                 pll_clke_mask = INTPLL_DIV5_CLKE_MASK;
 373                 div = 5;
 374                 break;
 375
 376         case SYSTEM_PLL1_133M_CLK:
 377         case SYSTEM_PLL2_166M_CLK:
 378                 pll_clke_mask = INTPLL_DIV6_CLKE_MASK;
 379                 div = 6;
 380                 break;
 381
 382         case SYSTEM_PLL1_100M_CLK:
 383         case SYSTEM_PLL2_125M_CLK:
 384                 pll_clke_mask = INTPLL_DIV8_CLKE_MASK;
 385                 div = 8;
 386                 break;
 387
 388         case SYSTEM_PLL1_80M_CLK:
 389         case SYSTEM_PLL2_100M_CLK:
 390                 pll_clke_mask = INTPLL_DIV10_CLKE_MASK;
 391                 div = 10;
 392                 break;
 393
 394         case SYSTEM_PLL1_40M_CLK:
 395         case SYSTEM_PLL2_50M_CLK:
 396                 pll_clke_mask = INTPLL_DIV20_CLKE_MASK;
 397                 div = 20;
 398                 break;
 399         default:
 400                 return -EINVAL;
 401         }
 402
 403         if ((pll_gnrl_ctl & pll_clke_mask) == 0)
 404                 return 0;
 405
 406         main_div = (pll_div_ctl & INTPLL_MAIN_DIV_MASK) >>
 407                 INTPLL_MAIN_DIV_SHIFT;
 408         pre_div = (pll_div_ctl & INTPLL_PRE_DIV_MASK) >>
 409                 INTPLL_PRE_DIV_SHIFT;
 410         post_div = (pll_div_ctl & INTPLL_POST_DIV_MASK) >>
 411                 INTPLL_POST_DIV_SHIFT;
 412
 413         /* FFVCO = (m * FFIN) / p, FFOUT = (m * FFIN) / (p * 2^s) */
 414         freq = 24000000ULL * main_div;
 415         return lldiv(freq, pre_div * (1 << post_div) * div);
 416 }
 417
 418 static u32 decode_fracpll(enum clk_root_src frac_pll)
 419 {
 420         u32 pll_gnrl_ctl, pll_fdiv_ctl0, pll_fdiv_ctl1;
 421         u32 main_div, pre_div, post_div, k;
 422
 423         switch (frac_pll) {
 424         case DRAM_PLL1_CLK:
 425                 pll_gnrl_ctl = readl(&ana_pll->dram_pll_gnrl_ctl);
 426                 pll_fdiv_ctl0 = readl(&ana_pll->dram_pll_fdiv_ctl0);
 427                 pll_fdiv_ctl1 = readl(&ana_pll->dram_pll_fdiv_ctl1);
 428                 break;
 429         case AUDIO_PLL1_CLK:
 430                 pll_gnrl_ctl = readl(&ana_pll->audio_pll1_gnrl_ctl);
 431                 pll_fdiv_ctl0 = readl(&ana_pll->audio_pll1_fdiv_ctl0);
 432                 pll_fdiv_ctl1 = readl(&ana_pll->audio_pll1_fdiv_ctl1);
 433                 break;
 434         case AUDIO_PLL2_CLK:
 435                 pll_gnrl_ctl = readl(&ana_pll->audio_pll2_gnrl_ctl);
 436                 pll_fdiv_ctl0 = readl(&ana_pll->audio_pll2_fdiv_ctl0);
 437                 pll_fdiv_ctl1 = readl(&ana_pll->audio_pll2_fdiv_ctl1);
 438                 break;
 439         case VIDEO_PLL_CLK:
 440                 pll_gnrl_ctl = readl(&ana_pll->video_pll1_gnrl_ctl);
 441                 pll_fdiv_ctl0 = readl(&ana_pll->video_pll1_fdiv_ctl0);
 442                 pll_fdiv_ctl1 = readl(&ana_pll->video_pll1_fdiv_ctl1);
 443                 break;
 444         default:
 445                 printf("Not supported\n");
 446                 return 0;
 447         }
 448
 449         /* Only support SYS_XTAL 24M, PAD_CLK not take into consideration */
 450         if ((pll_gnrl_ctl & INTPLL_REF_CLK_SEL_MASK) != 0)
 451                 return 0;
 452
 453         if ((pll_gnrl_ctl & INTPLL_RST_MASK) == 0)
 454                 return 0;
 455         /*
 456          * When BYPASS is equal to 1, PLL enters the bypass mode
 457          * regardless of the values of RESETB
 458          */
 459         if (pll_gnrl_ctl & INTPLL_BYPASS_MASK)
 460                 return 24000000u;
 461
 462         if (!(pll_gnrl_ctl & INTPLL_LOCK_MASK)) {
 463                 puts("pll not locked\n");
 464                 return 0;
 465         }
 466
 467         if (!(pll_gnrl_ctl & INTPLL_CLKE_MASK))
 468                 return 0;
 469
 470         main_div = (pll_fdiv_ctl0 & INTPLL_MAIN_DIV_MASK) >>
 471                 INTPLL_MAIN_DIV_SHIFT;
 472         pre_div = (pll_fdiv_ctl0 & INTPLL_PRE_DIV_MASK) >>
 473                 INTPLL_PRE_DIV_SHIFT;
 474         post_div = (pll_fdiv_ctl0 & INTPLL_POST_DIV_MASK) >>
 475                 INTPLL_POST_DIV_SHIFT;
 476
 477         k = pll_fdiv_ctl1 & GENMASK(15, 0);
 478
 479         return lldiv((main_div * 65536 + k) * 24000000ULL,
 480                      65536 * pre_div * (1 << post_div));
 481 }
 482
 483 static u32 get_root_src_clk(enum clk_root_src root_src)
 484 {
 485         switch (root_src) {
 486         case OSC_24M_CLK:
 487                 return 24000000u;
 488         case OSC_HDMI_CLK:
 489                 return 26000000u;
 490         case OSC_32K_CLK:
 491                 return 32000u;
 492         case ARM_PLL_CLK:
 493         case GPU_PLL_CLK:
 494         case VPU_PLL_CLK:
 495         case SYSTEM_PLL1_800M_CLK:
 496         case SYSTEM_PLL1_400M_CLK:
 497         case SYSTEM_PLL1_266M_CLK:
 498         case SYSTEM_PLL1_200M_CLK:
 499         case SYSTEM_PLL1_160M_CLK:
 500         case SYSTEM_PLL1_133M_CLK:
 501         case SYSTEM_PLL1_100M_CLK:
 502         case SYSTEM_PLL1_80M_CLK:
 503         case SYSTEM_PLL1_40M_CLK:
 504         case SYSTEM_PLL2_1000M_CLK:
 505         case SYSTEM_PLL2_500M_CLK:
 506         case SYSTEM_PLL2_333M_CLK:
 507         case SYSTEM_PLL2_250M_CLK:
 508         case SYSTEM_PLL2_200M_CLK:
 509         case SYSTEM_PLL2_166M_CLK:
 510         case SYSTEM_PLL2_125M_CLK:
 511         case SYSTEM_PLL2_100M_CLK:
 512         case SYSTEM_PLL2_50M_CLK:
 513         case SYSTEM_PLL3_CLK:
 514                 return decode_intpll(root_src);
 515         case DRAM_PLL1_CLK:
 516         case AUDIO_PLL1_CLK:
 517         case AUDIO_PLL2_CLK:
 518         case VIDEO_PLL_CLK:
 519                 return decode_fracpll(root_src);
 520         default:
 521                 return 0;
 522         }
 523
 524         return 0;
 525 }
 526
 527 static u32 get_root_clk(enum clk_root_index clock_id)
 528 {
 529         enum clk_root_src root_src;
 530         u32 post_podf, pre_podf, root_src_clk;
 531
 532         if (clock_root_enabled(clock_id) <= 0)
 533                 return 0;
 534
 535         if (clock_get_prediv(clock_id, &pre_podf) < 0)
 536                 return 0;
 537
 538         if (clock_get_postdiv(clock_id, &post_podf) < 0)
 539                 return 0;
 540
 541         if (clock_get_src(clock_id, &root_src) < 0)
 542                 return 0;
 543
 544         root_src_clk = get_root_src_clk(root_src);
 545
 546         return root_src_clk / (post_podf + 1) / (pre_podf + 1);
 547 }
 548
 549 u32 mxc_get_clock(enum mxc_clock clk)
 550 {
 551         u32 val;
 552
 553         switch (clk) {
 554         case MXC_ARM_CLK:
 555                 return get_root_clk(ARM_A53_CLK_ROOT);
 556         case MXC_IPG_CLK:
 557                 clock_get_target_val(IPG_CLK_ROOT, &val);
 558                 val = val & 0x3;
 559                 return get_root_clk(AHB_CLK_ROOT) / 2 / (val + 1);
 560         case MXC_CSPI_CLK:
 561                 return get_root_clk(ECSPI1_CLK_ROOT);
 562         case MXC_ESDHC_CLK:
 563                 return get_root_clk(USDHC1_CLK_ROOT);
 564         case MXC_ESDHC2_CLK:
 565                 return get_root_clk(USDHC2_CLK_ROOT);
 566         case MXC_ESDHC3_CLK:
 567                 return get_root_clk(USDHC3_CLK_ROOT);
 568         case MXC_I2C_CLK:
 569                 return get_root_clk(I2C1_CLK_ROOT);
 570         case MXC_UART_CLK:
 571                 return get_root_clk(UART1_CLK_ROOT);
 572         case MXC_QSPI_CLK:
 573                 return get_root_clk(QSPI_CLK_ROOT);
 574         default:
 575                 printf("Unsupported mxc_clock %d\n", clk);
 576                 break;
 577         }
 578
 579         return 0;
 580 }