arch/arm/mach-imx/pm-imx6.c

   1 /*
   2  * Copyright 2011-2014 Freescale Semiconductor, Inc.
   3  * Copyright 2011 Linaro Ltd.
   4  *
   5  * The code contained herein is licensed under the GNU General Public
   6  * License. You may obtain a copy of the GNU General Public License
   7  * Version 2 or later at the following locations:
   8  *
   9  * http://www.opensource.org/licenses/gpl-license.html
  10  * http://www.gnu.org/copyleft/gpl.html
  11  */
  12
  13 #include <linux/delay.h>
  14 #include <linux/init.h>
  15 #include <linux/io.h>
  16 #include <linux/irq.h>
  17 #include <linux/genalloc.h>
  18 #include <linux/mfd/syscon.h>
  19 #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
  20 #include <linux/of.h>
  21 #include <linux/of_address.h>
  22 #include <linux/of_platform.h>
  23 #include <linux/regmap.h>
  24 #include <linux/suspend.h>
  25 #include <asm/cacheflush.h>
  26 #include <asm/fncpy.h>
  27 #include <asm/proc-fns.h>
  28 #include <asm/suspend.h>
  29 #include <asm/tlb.h>
  30
  31 #include "common.h"
  32 #include "hardware.h"
  33
  34 #define CCR                             0x0
  35 #define BM_CCR_WB_COUNT                 (0x7 << 16)
  36 #define BM_CCR_RBC_BYPASS_COUNT         (0x3f << 21)
  37 #define BM_CCR_RBC_EN                   (0x1 << 27)
  38
  39 #define CLPCR                           0x54
  40 #define BP_CLPCR_LPM                    0
  41 #define BM_CLPCR_LPM                    (0x3 << 0)
  42 #define BM_CLPCR_BYPASS_PMIC_READY      (0x1 << 2)
  43 #define BM_CLPCR_ARM_CLK_DIS_ON_LPM     (0x1 << 5)
  44 #define BM_CLPCR_SBYOS                  (0x1 << 6)
  45 #define BM_CLPCR_DIS_REF_OSC            (0x1 << 7)
  46 #define BM_CLPCR_VSTBY                  (0x1 << 8)
  47 #define BP_CLPCR_STBY_COUNT             9
  48 #define BM_CLPCR_STBY_COUNT             (0x3 << 9)
  49 #define BM_CLPCR_COSC_PWRDOWN           (0x1 << 11)
  50 #define BM_CLPCR_WB_PER_AT_LPM          (0x1 << 16)
  51 #define BM_CLPCR_WB_CORE_AT_LPM         (0x1 << 17)
  52 #define BM_CLPCR_BYP_MMDC_CH0_LPM_HS    (0x1 << 19)
  53 #define BM_CLPCR_BYP_MMDC_CH1_LPM_HS    (0x1 << 21)
  54 #define BM_CLPCR_MASK_CORE0_WFI         (0x1 << 22)
  55 #define BM_CLPCR_MASK_CORE1_WFI         (0x1 << 23)
  56 #define BM_CLPCR_MASK_CORE2_WFI         (0x1 << 24)
  57 #define BM_CLPCR_MASK_CORE3_WFI         (0x1 << 25)
  58 #define BM_CLPCR_MASK_SCU_IDLE          (0x1 << 26)
  59 #define BM_CLPCR_MASK_L2CC_IDLE         (0x1 << 27)
  60
  61 #define CGPR                            0x64
  62 #define BM_CGPR_INT_MEM_CLK_LPM         (0x1 << 17)
  63
  64 #define MX6Q_SUSPEND_OCRAM_SIZE         0x1000
  65 #define MX6_MAX_MMDC_IO_NUM             33
  66
  67 static void __iomem *ccm_base;
  68 static void __iomem *suspend_ocram_base;
  69 static void (*imx6_suspend_in_ocram_fn)(void __iomem *ocram_vbase);
  70
  71 /*
  72  * suspend ocram space layout:
  73  * ======================== high address ======================
  74  *                              .
  75  *                              .
  76  *                              .
  77  *                              ^
  78  *                              ^
  79  *                              ^
  80  *                      imx6_suspend code
  81  *              PM_INFO structure(imx6_cpu_pm_info)
  82  * ======================== low address =======================
  83  */
  84
  85 struct imx6_pm_base {
  86         phys_addr_t pbase;
  87         void __iomem *vbase;
  88 };
  89
  90 struct imx6_pm_socdata {
  91         u32 ddr_type;
  92         const char *mmdc_compat;
  93         const char *src_compat;
  94         const char *iomuxc_compat;
  95         const char *gpc_compat;
  96         const u32 mmdc_io_num;
  97         const u32 *mmdc_io_offset;
  98 };
  99
 100 static const u32 imx6q_mmdc_io_offset[] __initconst = {
 101         0x5ac, 0x5b4, 0x528, 0x520, /* DQM0 ~ DQM3 */
 102         0x514, 0x510, 0x5bc, 0x5c4, /* DQM4 ~ DQM7 */
 103         0x56c, 0x578, 0x588, 0x594, /* CAS, RAS, SDCLK_0, SDCLK_1 */
 104         0x5a8, 0x5b0, 0x524, 0x51c, /* SDQS0 ~ SDQS3 */
 105         0x518, 0x50c, 0x5b8, 0x5c0, /* SDQS4 ~ SDQS7 */
 106         0x784, 0x788, 0x794, 0x79c, /* GPR_B0DS ~ GPR_B3DS */
 107         0x7a0, 0x7a4, 0x7a8, 0x748, /* GPR_B4DS ~ GPR_B7DS */
 108         0x59c, 0x5a0, 0x750, 0x774, /* SODT0, SODT1, MODE_CTL, MODE */
 109         0x74c,                      /* GPR_ADDS */
 110 };
 111
 112 static const u32 imx6dl_mmdc_io_offset[] __initconst = {
 113         0x470, 0x474, 0x478, 0x47c, /* DQM0 ~ DQM3 */
 114         0x480, 0x484, 0x488, 0x48c, /* DQM4 ~ DQM7 */
 115         0x464, 0x490, 0x4ac, 0x4b0, /* CAS, RAS, SDCLK_0, SDCLK_1 */
 116         0x4bc, 0x4c0, 0x4c4, 0x4c8, /* DRAM_SDQS0 ~ DRAM_SDQS3 */
 117         0x4cc, 0x4d0, 0x4d4, 0x4d8, /* DRAM_SDQS4 ~ DRAM_SDQS7 */
 118         0x764, 0x770, 0x778, 0x77c, /* GPR_B0DS ~ GPR_B3DS */
 119         0x780, 0x784, 0x78c, 0x748, /* GPR_B4DS ~ GPR_B7DS */
 120         0x4b4, 0x4b8, 0x750, 0x760, /* SODT0, SODT1, MODE_CTL, MODE */
 121         0x74c,                      /* GPR_ADDS */
 122 };
 123
 124 static const u32 imx6sl_mmdc_io_offset[] __initconst = {
 125         0x30c, 0x310, 0x314, 0x318, /* DQM0 ~ DQM3 */
 126         0x5c4, 0x5cc, 0x5d4, 0x5d8, /* GPR_B0DS ~ GPR_B3DS */
 127         0x300, 0x31c, 0x338, 0x5ac, /* CAS, RAS, SDCLK_0, GPR_ADDS */
 128         0x33c, 0x340, 0x5b0, 0x5c0, /* SODT0, SODT1, MODE_CTL, MODE */
 129         0x330, 0x334, 0x320,        /* SDCKE0, SDCKE1, RESET */
 130 };
 131
 132 static const u32 imx6sx_mmdc_io_offset[] __initconst = {
 133         0x2ec, 0x2f0, 0x2f4, 0x2f8, /* DQM0 ~ DQM3 */
 134         0x60c, 0x610, 0x61c, 0x620, /* GPR_B0DS ~ GPR_B3DS */
 135         0x300, 0x2fc, 0x32c, 0x5f4, /* CAS, RAS, SDCLK_0, GPR_ADDS */
 136         0x310, 0x314, 0x5f8, 0x608, /* SODT0, SODT1, MODE_CTL, MODE */
 137         0x330, 0x334, 0x338, 0x33c, /* SDQS0 ~ SDQS3 */
 138 };
 139
 140 static const struct imx6_pm_socdata imx6q_pm_data __initconst = {
 141         .mmdc_compat = "fsl,imx6q-mmdc",
 142         .src_compat = "fsl,imx6q-src",
 143         .iomuxc_compat = "fsl,imx6q-iomuxc",
 144         .gpc_compat = "fsl,imx6q-gpc",
 145         .mmdc_io_num = ARRAY_SIZE(imx6q_mmdc_io_offset),
 146         .mmdc_io_offset = imx6q_mmdc_io_offset,
 147 };
 148
 149 static const struct imx6_pm_socdata imx6dl_pm_data __initconst = {
 150         .mmdc_compat = "fsl,imx6q-mmdc",
 151         .src_compat = "fsl,imx6q-src",
 152         .iomuxc_compat = "fsl,imx6dl-iomuxc",
 153         .gpc_compat = "fsl,imx6q-gpc",
 154         .mmdc_io_num = ARRAY_SIZE(imx6dl_mmdc_io_offset),
 155         .mmdc_io_offset = imx6dl_mmdc_io_offset,
 156 };
 157
 158 static const struct imx6_pm_socdata imx6sl_pm_data __initconst = {
 159         .mmdc_compat = "fsl,imx6sl-mmdc",
 160         .src_compat = "fsl,imx6sl-src",
 161         .iomuxc_compat = "fsl,imx6sl-iomuxc",
 162         .gpc_compat = "fsl,imx6sl-gpc",
 163         .mmdc_io_num = ARRAY_SIZE(imx6sl_mmdc_io_offset),
 164         .mmdc_io_offset = imx6sl_mmdc_io_offset,
 165 };
 166
 167 static const struct imx6_pm_socdata imx6sx_pm_data __initconst = {
 168         .mmdc_compat = "fsl,imx6sx-mmdc",
 169         .src_compat = "fsl,imx6sx-src",
 170         .iomuxc_compat = "fsl,imx6sx-iomuxc",
 171         .gpc_compat = "fsl,imx6sx-gpc",
 172         .mmdc_io_num = ARRAY_SIZE(imx6sx_mmdc_io_offset),
 173         .mmdc_io_offset = imx6sx_mmdc_io_offset,
 174 };
 175
 176 /*
 177  * This structure is for passing necessary data for low level ocram
 178  * suspend code(arch/arm/mach-imx/suspend-imx6.S), if this struct
 179  * definition is changed, the offset definition in
 180  * arch/arm/mach-imx/suspend-imx6.S must be also changed accordingly,
 181  * otherwise, the suspend to ocram function will be broken!
 182  */
 183 struct imx6_cpu_pm_info {
 184         phys_addr_t pbase; /* The physical address of pm_info. */
 185         phys_addr_t resume_addr; /* The physical resume address for asm code */
 186         u32 ddr_type;
 187         u32 pm_info_size; /* Size of pm_info. */
 188         struct imx6_pm_base mmdc_base;
 189         struct imx6_pm_base src_base;
 190         struct imx6_pm_base iomuxc_base;
 191         struct imx6_pm_base ccm_base;
 192         struct imx6_pm_base gpc_base;
 193         struct imx6_pm_base l2_base;
 194         u32 mmdc_io_num; /* Number of MMDC IOs which need saved/restored. */
 195         u32 mmdc_io_val[MX6_MAX_MMDC_IO_NUM][2]; /* To save offset and value */
 196 } __aligned(8);
 197
 198 void imx6q_set_int_mem_clk_lpm(bool enable)
 199 {
 200         u32 val = readl_relaxed(ccm_base + CGPR);
 201
 202         val &= ~BM_CGPR_INT_MEM_CLK_LPM;
 203         if (enable)
 204                 val |= BM_CGPR_INT_MEM_CLK_LPM;
 205         writel_relaxed(val, ccm_base + CGPR);
 206 }
 207
 208 void imx6_enable_rbc(bool enable)
 209 {
 210         u32 val;
 211
 212         /*
 213          * need to mask all interrupts in GPC before
 214          * operating RBC configurations
 215          */
 216         imx_gpc_mask_all();
 217
 218         /* configure RBC enable bit */
 219         val = readl_relaxed(ccm_base + CCR);
 220         val &= ~BM_CCR_RBC_EN;
 221         val |= enable ? BM_CCR_RBC_EN : 0;
 222         writel_relaxed(val, ccm_base + CCR);
 223
 224         /* configure RBC count */
 225         val = readl_relaxed(ccm_base + CCR);
 226         val &= ~BM_CCR_RBC_BYPASS_COUNT;
 227         val |= enable ? BM_CCR_RBC_BYPASS_COUNT : 0;
 228         writel(val, ccm_base + CCR);
 229
 230         /*
 231          * need to delay at least 2 cycles of CKIL(32K)
 232          * due to hardware design requirement, which is
 233          * ~61us, here we use 65us for safe
 234          */
 235         udelay(65);
 236
 237         /* restore GPC interrupt mask settings */
 238         imx_gpc_restore_all();
 239 }
 240
 241 static void imx6q_enable_wb(bool enable)
 242 {
 243         u32 val;
 244
 245         /* configure well bias enable bit */
 246         val = readl_relaxed(ccm_base + CLPCR);
 247         val &= ~BM_CLPCR_WB_PER_AT_LPM;
 248         val |= enable ? BM_CLPCR_WB_PER_AT_LPM : 0;
 249         writel_relaxed(val, ccm_base + CLPCR);
 250
 251         /* configure well bias count */
 252         val = readl_relaxed(ccm_base + CCR);
 253         val &= ~BM_CCR_WB_COUNT;
 254         val |= enable ? BM_CCR_WB_COUNT : 0;
 255         writel_relaxed(val, ccm_base + CCR);
 256 }
 257
 258 int imx6_set_lpm(enum mxc_cpu_pwr_mode mode)
 259 {
 260         u32 val = readl_relaxed(ccm_base + CLPCR);
 261
 262         val &= ~BM_CLPCR_LPM;
 263         switch (mode) {
 264         case WAIT_CLOCKED:
 265                 break;
 266         case WAIT_UNCLOCKED:
 267                 val |= 0x1 << BP_CLPCR_LPM;
 268                 val |= BM_CLPCR_ARM_CLK_DIS_ON_LPM;
 269                 break;
 270         case STOP_POWER_ON:
 271                 val |= 0x2 << BP_CLPCR_LPM;
 272                 val &= ~BM_CLPCR_VSTBY;
 273                 val &= ~BM_CLPCR_SBYOS;
 274                 if (cpu_is_imx6sl())
 275                         val |= BM_CLPCR_BYPASS_PMIC_READY;
 276                 if (cpu_is_imx6sl() || cpu_is_imx6sx())
 277                         val |= BM_CLPCR_BYP_MMDC_CH0_LPM_HS;
 278                 else
 279                         val |= BM_CLPCR_BYP_MMDC_CH1_LPM_HS;
 280                 break;
 281         case WAIT_UNCLOCKED_POWER_OFF:
 282                 val |= 0x1 << BP_CLPCR_LPM;
 283                 val &= ~BM_CLPCR_VSTBY;
 284                 val &= ~BM_CLPCR_SBYOS;
 285                 break;
 286         case STOP_POWER_OFF:
 287                 val |= 0x2 << BP_CLPCR_LPM;
 288                 val |= 0x3 << BP_CLPCR_STBY_COUNT;
 289                 val |= BM_CLPCR_VSTBY;
 290                 val |= BM_CLPCR_SBYOS;
 291                 if (cpu_is_imx6sl())
 292                         val |= BM_CLPCR_BYPASS_PMIC_READY;
 293                 if (cpu_is_imx6sl() || cpu_is_imx6sx())
 294                         val |= BM_CLPCR_BYP_MMDC_CH0_LPM_HS;
 295                 else
 296                         val |= BM_CLPCR_BYP_MMDC_CH1_LPM_HS;
 297                 break;
 298         default:
 299                 return -EINVAL;
 300         }
 301
 302         /*
 303          * ERR007265: CCM: When improper low-power sequence is used,
 304          * the SoC enters low power mode before the ARM core executes WFI.
 305          *
 306          * Software workaround:
 307          * 1) Software should trigger IRQ #32 (IOMUX) to be always pending
 308          *    by setting IOMUX_GPR1_GINT.
 309          * 2) Software should then unmask IRQ #32 in GPC before setting CCM
 310          *    Low-Power mode.
 311          * 3) Software should mask IRQ #32 right after CCM Low-Power mode
 312          *    is set (set bits 0-1 of CCM_CLPCR).
 313          *
 314          * Note that IRQ #32 is GIC SPI #0.
 315          */
 316         imx_gpc_hwirq_unmask(0);
 317         writel_relaxed(val, ccm_base + CLPCR);
 318         imx_gpc_hwirq_mask(0);
 319
 320         return 0;
 321 }
 322
 323 static int imx6q_suspend_finish(unsigned long val)
 324 {
 325         if (!imx6_suspend_in_ocram_fn) {
 326                 cpu_do_idle();
 327         } else {
 328                 /*
 329                  * call low level suspend function in ocram,
 330                  * as we need to float DDR IO.
 331                  */
 332                 local_flush_tlb_all();
 333                 imx6_suspend_in_ocram_fn(suspend_ocram_base);
 334         }
 335
 336         return 0;
 337 }
 338
 339 static int imx6q_pm_enter(suspend_state_t state)
 340 {
 341         switch (state) {
 342         case PM_SUSPEND_STANDBY:
 343                 imx6_set_lpm(STOP_POWER_ON);
 344                 imx6q_set_int_mem_clk_lpm(true);
 345                 imx_gpc_pre_suspend(false);
 346                 if (cpu_is_imx6sl())
 347                         imx6sl_set_wait_clk(true);
 348                 /* Zzz ... */
 349                 cpu_do_idle();
 350                 if (cpu_is_imx6sl())
 351                         imx6sl_set_wait_clk(false);
 352                 imx_gpc_post_resume();
 353                 imx6_set_lpm(WAIT_CLOCKED);
 354                 break;
 355         case PM_SUSPEND_MEM:
 356                 imx6_set_lpm(STOP_POWER_OFF);
 357                 imx6q_set_int_mem_clk_lpm(false);
 358                 imx6q_enable_wb(true);
 359                 /*
 360                  * For suspend into ocram, asm code already take care of
 361                  * RBC setting, so we do NOT need to do that here.
 362                  */
 363                 if (!imx6_suspend_in_ocram_fn)
 364                         imx6_enable_rbc(true);
 365                 imx_gpc_pre_suspend(true);
 366                 imx_anatop_pre_suspend();
 367                 /* Zzz ... */
 368                 cpu_suspend(0, imx6q_suspend_finish);
 369                 if (cpu_is_imx6q() || cpu_is_imx6dl())
 370                         imx_smp_prepare();
 371                 imx_anatop_post_resume();
 372                 imx_gpc_post_resume();
 373                 imx6_enable_rbc(false);
 374                 imx6q_enable_wb(false);
 375                 imx6q_set_int_mem_clk_lpm(true);
 376                 imx6_set_lpm(WAIT_CLOCKED);
 377                 break;
 378         default:
 379                 return -EINVAL;
 380         }
 381
 382         return 0;
 383 }
 384
 385 static int imx6q_pm_valid(suspend_state_t state)
 386 {
 387         return (state == PM_SUSPEND_STANDBY || state == PM_SUSPEND_MEM);
 388 }
 389
 390 static const struct platform_suspend_ops imx6q_pm_ops = {
 391         .enter = imx6q_pm_enter,
 392         .valid = imx6q_pm_valid,
 393 };
 394
 395 static int __init imx6_pm_get_base(struct imx6_pm_base *base,
 396                                 const char *compat)
 397 {
 398         struct device_node *node;
 399         struct resource res;
 400         int ret = 0;
 401
 402         node = of_find_compatible_node(NULL, NULL, compat);
 403         if (!node) {
 404                 ret = -ENODEV;
 405                 goto out;
 406         }
 407
 408         ret = of_address_to_resource(node, 0, &res);
 409         if (ret)
 410                 goto put_node;
 411
 412         base->pbase = res.start;
 413         base->vbase = ioremap(res.start, resource_size(&res));
 414         if (!base->vbase)
 415                 ret = -ENOMEM;
 416
 417 put_node:
 418         of_node_put(node);
 419 out:
 420         return ret;
 421 }
 422
 423 static int __init imx6q_suspend_init(const struct imx6_pm_socdata *socdata)
 424 {
 425         phys_addr_t ocram_pbase;
 426         struct device_node *node;
 427         struct platform_device *pdev;
 428         struct imx6_cpu_pm_info *pm_info;
 429         struct gen_pool *ocram_pool;
 430         unsigned long ocram_base;
 431         int i, ret = 0;
 432         const u32 *mmdc_offset_array;
 433
 434         suspend_set_ops(&imx6q_pm_ops);
 435
 436         if (!socdata) {
 437                 pr_warn("%s: invalid argument!\n", __func__);
 438                 return -EINVAL;
 439         }
 440
 441         node = of_find_compatible_node(NULL, NULL, "mmio-sram");
 442         if (!node) {
 443                 pr_warn("%s: failed to find ocram node!\n", __func__);
 444                 return -ENODEV;
 445         }
 446
 447         pdev = of_find_device_by_node(node);
 448         if (!pdev) {
 449                 pr_warn("%s: failed to find ocram device!\n", __func__);
 450                 ret = -ENODEV;
 451                 goto put_node;
 452         }
 453
 454         ocram_pool = gen_pool_get(&pdev->dev, NULL);
 455         if (!ocram_pool) {
 456                 pr_warn("%s: ocram pool unavailable!\n", __func__);
 457                 ret = -ENODEV;
 458                 goto put_node;
 459         }
 460
 461         ocram_base = gen_pool_alloc(ocram_pool, MX6Q_SUSPEND_OCRAM_SIZE);
 462         if (!ocram_base) {
 463                 pr_warn("%s: unable to alloc ocram!\n", __func__);
 464                 ret = -ENOMEM;
 465                 goto put_node;
 466         }
 467
 468         ocram_pbase = gen_pool_virt_to_phys(ocram_pool, ocram_base);
 469
 470         suspend_ocram_base = __arm_ioremap_exec(ocram_pbase,
 471                 MX6Q_SUSPEND_OCRAM_SIZE, false);
 472
 473         pm_info = suspend_ocram_base;
 474         pm_info->pbase = ocram_pbase;
 475         pm_info->resume_addr = virt_to_phys(v7_cpu_resume);
 476         pm_info->pm_info_size = sizeof(*pm_info);
 477
 478         /*
 479          * ccm physical address is not used by asm code currently,
 480          * so get ccm virtual address directly.
 481          */
 482         pm_info->ccm_base.vbase = ccm_base;
 483
 484         ret = imx6_pm_get_base(&pm_info->mmdc_base, socdata->mmdc_compat);
 485         if (ret) {
 486                 pr_warn("%s: failed to get mmdc base %d!\n", __func__, ret);
 487                 goto put_node;
 488         }
 489
 490         ret = imx6_pm_get_base(&pm_info->src_base, socdata->src_compat);
 491         if (ret) {
 492                 pr_warn("%s: failed to get src base %d!\n", __func__, ret);
 493                 goto src_map_failed;
 494         }
 495
 496         ret = imx6_pm_get_base(&pm_info->iomuxc_base, socdata->iomuxc_compat);
 497         if (ret) {
 498                 pr_warn("%s: failed to get iomuxc base %d!\n", __func__, ret);
 499                 goto iomuxc_map_failed;
 500         }
 501
 502         ret = imx6_pm_get_base(&pm_info->gpc_base, socdata->gpc_compat);
 503         if (ret) {
 504                 pr_warn("%s: failed to get gpc base %d!\n", __func__, ret);
 505                 goto gpc_map_failed;
 506         }
 507
 508         ret = imx6_pm_get_base(&pm_info->l2_base, "arm,pl310-cache");
 509         if (ret) {
 510                 pr_warn("%s: failed to get pl310-cache base %d!\n",
 511                         __func__, ret);
 512                 goto pl310_cache_map_failed;
 513         }
 514
 515         pm_info->ddr_type = imx_mmdc_get_ddr_type();
 516         pm_info->mmdc_io_num = socdata->mmdc_io_num;
 517         mmdc_offset_array = socdata->mmdc_io_offset;
 518
 519         for (i = 0; i < pm_info->mmdc_io_num; i++) {
 520                 pm_info->mmdc_io_val[i][0] =
 521                         mmdc_offset_array[i];
 522                 pm_info->mmdc_io_val[i][1] =
 523                         readl_relaxed(pm_info->iomuxc_base.vbase +
 524                         mmdc_offset_array[i]);
 525         }
 526
 527         imx6_suspend_in_ocram_fn = fncpy(
 528                 suspend_ocram_base + sizeof(*pm_info),
 529                 &imx6_suspend,
 530                 MX6Q_SUSPEND_OCRAM_SIZE - sizeof(*pm_info));
 531
 532         goto put_node;
 533
 534 pl310_cache_map_failed:
 535         iounmap(&pm_info->gpc_base.vbase);
 536 gpc_map_failed:
 537         iounmap(&pm_info->iomuxc_base.vbase);
 538 iomuxc_map_failed:
 539         iounmap(&pm_info->src_base.vbase);
 540 src_map_failed:
 541         iounmap(&pm_info->mmdc_base.vbase);
 542 put_node:
 543         of_node_put(node);
 544
 545         return ret;
 546 }
 547
 548 static void __init imx6_pm_common_init(const struct imx6_pm_socdata
 549                                         *socdata)
 550 {
 551         struct regmap *gpr;
 552         int ret;
 553
 554         WARN_ON(!ccm_base);
 555
 556         if (IS_ENABLED(CONFIG_SUSPEND)) {
 557                 ret = imx6q_suspend_init(socdata);
 558                 if (ret)
 559                         pr_warn("%s: No DDR LPM support with suspend %d!\n",
 560                                 __func__, ret);
 561         }
 562
 563         /*
 564          * This is for SW workaround step #1 of ERR007265, see comments
 565          * in imx6_set_lpm for details of this errata.
 566          * Force IOMUXC irq pending, so that the interrupt to GPC can be
 567          * used to deassert dsm_request signal when the signal gets
 568          * asserted unexpectedly.
 569          */
 570         gpr = syscon_regmap_lookup_by_compatible("fsl,imx6q-iomuxc-gpr");
 571         if (!IS_ERR(gpr))
 572                 regmap_update_bits(gpr, IOMUXC_GPR1, IMX6Q_GPR1_GINT,
 573                                    IMX6Q_GPR1_GINT);
 574 }
 575
 576 void __init imx6_pm_ccm_init(const char *ccm_compat)
 577 {
 578         struct device_node *np;
 579         u32 val;
 580
 581         np = of_find_compatible_node(NULL, NULL, ccm_compat);
 582         ccm_base = of_iomap(np, 0);
 583         BUG_ON(!ccm_base);
 584
 585         /*
 586          * Initialize CCM_CLPCR_LPM into RUN mode to avoid ARM core
 587          * clock being shut down unexpectedly by WAIT mode.
 588          */
 589         val = readl_relaxed(ccm_base + CLPCR);
 590         val &= ~BM_CLPCR_LPM;
 591         writel_relaxed(val, ccm_base + CLPCR);
 592 }
 593
 594 void __init imx6q_pm_init(void)
 595 {
 596         imx6_pm_common_init(&imx6q_pm_data);
 597 }
 598
 599 void __init imx6dl_pm_init(void)
 600 {
 601         imx6_pm_common_init(&imx6dl_pm_data);
 602 }
 603
 604 void __init imx6sl_pm_init(void)
 605 {
 606         imx6_pm_common_init(&imx6sl_pm_data);
 607 }
 608
 609 void __init imx6sx_pm_init(void)
 610 {
 611         imx6_pm_common_init(&imx6sx_pm_data);
 612 }