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 imx6q_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         imx_gpc_hwirq_unmask(32);
 315         writel_relaxed(val, ccm_base + CLPCR);
 316         imx_gpc_hwirq_mask(32);
 317
 318         return 0;
 319 }
 320
 321 static int imx6q_suspend_finish(unsigned long val)
 322 {
 323         if (!imx6_suspend_in_ocram_fn) {
 324                 cpu_do_idle();
 325         } else {
 326                 /*
 327                  * call low level suspend function in ocram,
 328                  * as we need to float DDR IO.
 329                  */
 330                 local_flush_tlb_all();
 331                 imx6_suspend_in_ocram_fn(suspend_ocram_base);
 332         }
 333
 334         return 0;
 335 }
 336
 337 static int imx6q_pm_enter(suspend_state_t state)
 338 {
 339         switch (state) {
 340         case PM_SUSPEND_STANDBY:
 341                 imx6q_set_lpm(STOP_POWER_ON);
 342                 imx6q_set_int_mem_clk_lpm(true);
 343                 imx_gpc_pre_suspend(false);
 344                 if (cpu_is_imx6sl())
 345                         imx6sl_set_wait_clk(true);
 346                 /* Zzz ... */
 347                 cpu_do_idle();
 348                 if (cpu_is_imx6sl())
 349                         imx6sl_set_wait_clk(false);
 350                 imx_gpc_post_resume();
 351                 imx6q_set_lpm(WAIT_CLOCKED);
 352                 break;
 353         case PM_SUSPEND_MEM:
 354                 imx6q_set_lpm(STOP_POWER_OFF);
 355                 imx6q_set_int_mem_clk_lpm(false);
 356                 imx6q_enable_wb(true);
 357                 /*
 358                  * For suspend into ocram, asm code already take care of
 359                  * RBC setting, so we do NOT need to do that here.
 360                  */
 361                 if (!imx6_suspend_in_ocram_fn)
 362                         imx6_enable_rbc(true);
 363                 imx_gpc_pre_suspend(true);
 364                 imx_anatop_pre_suspend();
 365                 /* Zzz ... */
 366                 cpu_suspend(0, imx6q_suspend_finish);
 367                 if (cpu_is_imx6q() || cpu_is_imx6dl())
 368                         imx_smp_prepare();
 369                 imx_anatop_post_resume();
 370                 imx_gpc_post_resume();
 371                 imx6_enable_rbc(false);
 372                 imx6q_enable_wb(false);
 373                 imx6q_set_int_mem_clk_lpm(true);
 374                 imx6q_set_lpm(WAIT_CLOCKED);
 375                 break;
 376         default:
 377                 return -EINVAL;
 378         }
 379
 380         return 0;
 381 }
 382
 383 static int imx6q_pm_valid(suspend_state_t state)
 384 {
 385         return (state == PM_SUSPEND_STANDBY || state == PM_SUSPEND_MEM);
 386 }
 387
 388 static const struct platform_suspend_ops imx6q_pm_ops = {
 389         .enter = imx6q_pm_enter,
 390         .valid = imx6q_pm_valid,
 391 };
 392
 393 void __init imx6q_pm_set_ccm_base(void __iomem *base)
 394 {
 395         ccm_base = base;
 396 }
 397
 398 static int __init imx6_pm_get_base(struct imx6_pm_base *base,
 399                                 const char *compat)
 400 {
 401         struct device_node *node;
 402         struct resource res;
 403         int ret = 0;
 404
 405         node = of_find_compatible_node(NULL, NULL, compat);
 406         if (!node) {
 407                 ret = -ENODEV;
 408                 goto out;
 409         }
 410
 411         ret = of_address_to_resource(node, 0, &res);
 412         if (ret)
 413                 goto put_node;
 414
 415         base->pbase = res.start;
 416         base->vbase = ioremap(res.start, resource_size(&res));
 417         if (!base->vbase)
 418                 ret = -ENOMEM;
 419
 420 put_node:
 421         of_node_put(node);
 422 out:
 423         return ret;
 424 }
 425
 426 static int __init imx6q_suspend_init(const struct imx6_pm_socdata *socdata)
 427 {
 428         phys_addr_t ocram_pbase;
 429         struct device_node *node;
 430         struct platform_device *pdev;
 431         struct imx6_cpu_pm_info *pm_info;
 432         struct gen_pool *ocram_pool;
 433         unsigned long ocram_base;
 434         int i, ret = 0;
 435         const u32 *mmdc_offset_array;
 436
 437         suspend_set_ops(&imx6q_pm_ops);
 438
 439         if (!socdata) {
 440                 pr_warn("%s: invalid argument!\n", __func__);
 441                 return -EINVAL;
 442         }
 443
 444         node = of_find_compatible_node(NULL, NULL, "mmio-sram");
 445         if (!node) {
 446                 pr_warn("%s: failed to find ocram node!\n", __func__);
 447                 return -ENODEV;
 448         }
 449
 450         pdev = of_find_device_by_node(node);
 451         if (!pdev) {
 452                 pr_warn("%s: failed to find ocram device!\n", __func__);
 453                 ret = -ENODEV;
 454                 goto put_node;
 455         }
 456
 457         ocram_pool = dev_get_gen_pool(&pdev->dev);
 458         if (!ocram_pool) {
 459                 pr_warn("%s: ocram pool unavailable!\n", __func__);
 460                 ret = -ENODEV;
 461                 goto put_node;
 462         }
 463
 464         ocram_base = gen_pool_alloc(ocram_pool, MX6Q_SUSPEND_OCRAM_SIZE);
 465         if (!ocram_base) {
 466                 pr_warn("%s: unable to alloc ocram!\n", __func__);
 467                 ret = -ENOMEM;
 468                 goto put_node;
 469         }
 470
 471         ocram_pbase = gen_pool_virt_to_phys(ocram_pool, ocram_base);
 472
 473         suspend_ocram_base = __arm_ioremap_exec(ocram_pbase,
 474                 MX6Q_SUSPEND_OCRAM_SIZE, false);
 475
 476         pm_info = suspend_ocram_base;
 477         pm_info->pbase = ocram_pbase;
 478         pm_info->resume_addr = virt_to_phys(v7_cpu_resume);
 479         pm_info->pm_info_size = sizeof(*pm_info);
 480
 481         /*
 482          * ccm physical address is not used by asm code currently,
 483          * so get ccm virtual address directly, as we already have
 484          * it from ccm driver.
 485          */
 486         pm_info->ccm_base.vbase = ccm_base;
 487
 488         ret = imx6_pm_get_base(&pm_info->mmdc_base, socdata->mmdc_compat);
 489         if (ret) {
 490                 pr_warn("%s: failed to get mmdc base %d!\n", __func__, ret);
 491                 goto put_node;
 492         }
 493
 494         ret = imx6_pm_get_base(&pm_info->src_base, socdata->src_compat);
 495         if (ret) {
 496                 pr_warn("%s: failed to get src base %d!\n", __func__, ret);
 497                 goto src_map_failed;
 498         }
 499
 500         ret = imx6_pm_get_base(&pm_info->iomuxc_base, socdata->iomuxc_compat);
 501         if (ret) {
 502                 pr_warn("%s: failed to get iomuxc base %d!\n", __func__, ret);
 503                 goto iomuxc_map_failed;
 504         }
 505
 506         ret = imx6_pm_get_base(&pm_info->gpc_base, socdata->gpc_compat);
 507         if (ret) {
 508                 pr_warn("%s: failed to get gpc base %d!\n", __func__, ret);
 509                 goto gpc_map_failed;
 510         }
 511
 512         ret = imx6_pm_get_base(&pm_info->l2_base, "arm,pl310-cache");
 513         if (ret) {
 514                 pr_warn("%s: failed to get pl310-cache base %d!\n",
 515                         __func__, ret);
 516                 goto pl310_cache_map_failed;
 517         }
 518
 519         pm_info->ddr_type = imx_mmdc_get_ddr_type();
 520         pm_info->mmdc_io_num = socdata->mmdc_io_num;
 521         mmdc_offset_array = socdata->mmdc_io_offset;
 522
 523         for (i = 0; i < pm_info->mmdc_io_num; i++) {
 524                 pm_info->mmdc_io_val[i][0] =
 525                         mmdc_offset_array[i];
 526                 pm_info->mmdc_io_val[i][1] =
 527                         readl_relaxed(pm_info->iomuxc_base.vbase +
 528                         mmdc_offset_array[i]);
 529         }
 530
 531         imx6_suspend_in_ocram_fn = fncpy(
 532                 suspend_ocram_base + sizeof(*pm_info),
 533                 &imx6_suspend,
 534                 MX6Q_SUSPEND_OCRAM_SIZE - sizeof(*pm_info));
 535
 536         goto put_node;
 537
 538 pl310_cache_map_failed:
 539         iounmap(&pm_info->gpc_base.vbase);
 540 gpc_map_failed:
 541         iounmap(&pm_info->iomuxc_base.vbase);
 542 iomuxc_map_failed:
 543         iounmap(&pm_info->src_base.vbase);
 544 src_map_failed:
 545         iounmap(&pm_info->mmdc_base.vbase);
 546 put_node:
 547         of_node_put(node);
 548
 549         return ret;
 550 }
 551
 552 static void __init imx6_pm_common_init(const struct imx6_pm_socdata
 553                                         *socdata)
 554 {
 555         struct regmap *gpr;
 556         int ret;
 557
 558         WARN_ON(!ccm_base);
 559
 560         if (IS_ENABLED(CONFIG_SUSPEND)) {
 561                 ret = imx6q_suspend_init(socdata);
 562                 if (ret)
 563                         pr_warn("%s: No DDR LPM support with suspend %d!\n",
 564                                 __func__, ret);
 565         }
 566
 567         /*
 568          * This is for SW workaround step #1 of ERR007265, see comments
 569          * in imx6q_set_lpm for details of this errata.
 570          * Force IOMUXC irq pending, so that the interrupt to GPC can be
 571          * used to deassert dsm_request signal when the signal gets
 572          * asserted unexpectedly.
 573          */
 574         gpr = syscon_regmap_lookup_by_compatible("fsl,imx6q-iomuxc-gpr");
 575         if (!IS_ERR(gpr))
 576                 regmap_update_bits(gpr, IOMUXC_GPR1, IMX6Q_GPR1_GINT,
 577                                    IMX6Q_GPR1_GINT);
 578 }
 579
 580 void __init imx6q_pm_init(void)
 581 {
 582         imx6_pm_common_init(&imx6q_pm_data);
 583 }
 584
 585 void __init imx6dl_pm_init(void)
 586 {
 587         imx6_pm_common_init(&imx6dl_pm_data);
 588 }
 589
 590 void __init imx6sl_pm_init(void)
 591 {
 592         imx6_pm_common_init(&imx6sl_pm_data);
 593 }
 594
 595 void __init imx6sx_pm_init(void)
 596 {
 597         imx6_pm_common_init(&imx6sx_pm_data);
 598 }