drivers/reset/reset-imx7.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2017, Impinj, Inc.
   4  *
   5  * i.MX7 System Reset Controller (SRC) driver
   6  *
   7  * Author: Andrey Smirnov <andrew.smirnov@gmail.com>
   8  */
   9
  10 #include <linux/mfd/syscon.h>
  11 #include <linux/module.h>
  12 #include <linux/of_device.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/reset-controller.h>
  15 #include <linux/regmap.h>
  16 #include <dt-bindings/reset/imx7-reset.h>
  17 #include <dt-bindings/reset/imx8mq-reset.h>
  18 #include <dt-bindings/reset/imx8mp-reset.h>
  19
  20 struct imx7_src_signal {
  21         unsigned int offset, bit;
  22 };
  23
  24 struct imx7_src_variant {
  25         const struct imx7_src_signal *signals;
  26         unsigned int signals_num;
  27         struct reset_control_ops ops;
  28 };
  29
  30 struct imx7_src {
  31         struct reset_controller_dev rcdev;
  32         struct regmap *regmap;
  33         const struct imx7_src_signal *signals;
  34 };
  35
  36 enum imx7_src_registers {
  37         SRC_A7RCR0              = 0x0004,
  38         SRC_M4RCR               = 0x000c,
  39         SRC_ERCR                = 0x0014,
  40         SRC_HSICPHY_RCR         = 0x001c,
  41         SRC_USBOPHY1_RCR        = 0x0020,
  42         SRC_USBOPHY2_RCR        = 0x0024,
  43         SRC_MIPIPHY_RCR         = 0x0028,
  44         SRC_PCIEPHY_RCR         = 0x002c,
  45         SRC_DDRC_RCR            = 0x1000,
  46 };
  47
  48 static int imx7_reset_update(struct imx7_src *imx7src,
  49                              unsigned long id, unsigned int value)
  50 {
  51         const struct imx7_src_signal *signal = &imx7src->signals[id];
  52
  53         return regmap_update_bits(imx7src->regmap,
  54                                   signal->offset, signal->bit, value);
  55 }
  56
  57 static const struct imx7_src_signal imx7_src_signals[IMX7_RESET_NUM] = {
  58         [IMX7_RESET_A7_CORE_POR_RESET0] = { SRC_A7RCR0, BIT(0) },
  59         [IMX7_RESET_A7_CORE_POR_RESET1] = { SRC_A7RCR0, BIT(1) },
  60         [IMX7_RESET_A7_CORE_RESET0]     = { SRC_A7RCR0, BIT(4) },
  61         [IMX7_RESET_A7_CORE_RESET1]     = { SRC_A7RCR0, BIT(5) },
  62         [IMX7_RESET_A7_DBG_RESET0]      = { SRC_A7RCR0, BIT(8) },
  63         [IMX7_RESET_A7_DBG_RESET1]      = { SRC_A7RCR0, BIT(9) },
  64         [IMX7_RESET_A7_ETM_RESET0]      = { SRC_A7RCR0, BIT(12) },
  65         [IMX7_RESET_A7_ETM_RESET1]      = { SRC_A7RCR0, BIT(13) },
  66         [IMX7_RESET_A7_SOC_DBG_RESET]   = { SRC_A7RCR0, BIT(20) },
  67         [IMX7_RESET_A7_L2RESET]         = { SRC_A7RCR0, BIT(21) },
  68         [IMX7_RESET_SW_M4C_RST]         = { SRC_M4RCR, BIT(1) },
  69         [IMX7_RESET_SW_M4P_RST]         = { SRC_M4RCR, BIT(2) },
  70         [IMX7_RESET_EIM_RST]            = { SRC_ERCR, BIT(0) },
  71         [IMX7_RESET_HSICPHY_PORT_RST]   = { SRC_HSICPHY_RCR, BIT(1) },
  72         [IMX7_RESET_USBPHY1_POR]        = { SRC_USBOPHY1_RCR, BIT(0) },
  73         [IMX7_RESET_USBPHY1_PORT_RST]   = { SRC_USBOPHY1_RCR, BIT(1) },
  74         [IMX7_RESET_USBPHY2_POR]        = { SRC_USBOPHY2_RCR, BIT(0) },
  75         [IMX7_RESET_USBPHY2_PORT_RST]   = { SRC_USBOPHY2_RCR, BIT(1) },
  76         [IMX7_RESET_MIPI_PHY_MRST]      = { SRC_MIPIPHY_RCR, BIT(1) },
  77         [IMX7_RESET_MIPI_PHY_SRST]      = { SRC_MIPIPHY_RCR, BIT(2) },
  78         [IMX7_RESET_PCIEPHY]            = { SRC_PCIEPHY_RCR, BIT(2) | BIT(1) },
  79         [IMX7_RESET_PCIEPHY_PERST]      = { SRC_PCIEPHY_RCR, BIT(3) },
  80         [IMX7_RESET_PCIE_CTRL_APPS_EN]  = { SRC_PCIEPHY_RCR, BIT(6) },
  81         [IMX7_RESET_PCIE_CTRL_APPS_TURNOFF] = { SRC_PCIEPHY_RCR, BIT(11) },
  82         [IMX7_RESET_DDRC_PRST]          = { SRC_DDRC_RCR, BIT(0) },
  83         [IMX7_RESET_DDRC_CORE_RST]      = { SRC_DDRC_RCR, BIT(1) },
  84 };
  85
  86 static struct imx7_src *to_imx7_src(struct reset_controller_dev *rcdev)
  87 {
  88         return container_of(rcdev, struct imx7_src, rcdev);
  89 }
  90
  91 static int imx7_reset_set(struct reset_controller_dev *rcdev,
  92                           unsigned long id, bool assert)
  93 {
  94         struct imx7_src *imx7src = to_imx7_src(rcdev);
  95         const unsigned int bit = imx7src->signals[id].bit;
  96         unsigned int value = assert ? bit : 0;
  97
  98         switch (id) {
  99         case IMX7_RESET_PCIEPHY:
 100                 /*
 101                  * wait for more than 10us to release phy g_rst and
 102                  * btnrst
 103                  */
 104                 if (!assert)
 105                         udelay(10);
 106                 break;
 107
 108         case IMX7_RESET_PCIE_CTRL_APPS_EN:
 109                 value = assert ? 0 : bit;
 110                 break;
 111         }
 112
 113         return imx7_reset_update(imx7src, id, value);
 114 }
 115
 116 static int imx7_reset_assert(struct reset_controller_dev *rcdev,
 117                              unsigned long id)
 118 {
 119         return imx7_reset_set(rcdev, id, true);
 120 }
 121
 122 static int imx7_reset_deassert(struct reset_controller_dev *rcdev,
 123                                unsigned long id)
 124 {
 125         return imx7_reset_set(rcdev, id, false);
 126 }
 127
 128 static const struct imx7_src_variant variant_imx7 = {
 129         .signals = imx7_src_signals,
 130         .signals_num = ARRAY_SIZE(imx7_src_signals),
 131         .ops = {
 132                 .assert   = imx7_reset_assert,
 133                 .deassert = imx7_reset_deassert,
 134         },
 135 };
 136
 137 enum imx8mq_src_registers {
 138         SRC_A53RCR0             = 0x0004,
 139         SRC_HDMI_RCR            = 0x0030,
 140         SRC_DISP_RCR            = 0x0034,
 141         SRC_GPU_RCR             = 0x0040,
 142         SRC_VPU_RCR             = 0x0044,
 143         SRC_PCIE2_RCR           = 0x0048,
 144         SRC_MIPIPHY1_RCR        = 0x004c,
 145         SRC_MIPIPHY2_RCR        = 0x0050,
 146         SRC_DDRC2_RCR           = 0x1004,
 147 };
 148
 149 enum imx8mp_src_registers {
 150         SRC_SUPERMIX_RCR        = 0x0018,
 151         SRC_AUDIOMIX_RCR        = 0x001c,
 152         SRC_MLMIX_RCR           = 0x0028,
 153         SRC_GPU2D_RCR           = 0x0038,
 154         SRC_GPU3D_RCR           = 0x003c,
 155         SRC_VPU_G1_RCR          = 0x0048,
 156         SRC_VPU_G2_RCR          = 0x004c,
 157         SRC_VPUVC8KE_RCR        = 0x0050,
 158         SRC_NOC_RCR             = 0x0054,
 159 };
 160
 161 static const struct imx7_src_signal imx8mq_src_signals[IMX8MQ_RESET_NUM] = {
 162         [IMX8MQ_RESET_A53_CORE_POR_RESET0]      = { SRC_A53RCR0, BIT(0) },
 163         [IMX8MQ_RESET_A53_CORE_POR_RESET1]      = { SRC_A53RCR0, BIT(1) },
 164         [IMX8MQ_RESET_A53_CORE_POR_RESET2]      = { SRC_A53RCR0, BIT(2) },
 165         [IMX8MQ_RESET_A53_CORE_POR_RESET3]      = { SRC_A53RCR0, BIT(3) },
 166         [IMX8MQ_RESET_A53_CORE_RESET0]          = { SRC_A53RCR0, BIT(4) },
 167         [IMX8MQ_RESET_A53_CORE_RESET1]          = { SRC_A53RCR0, BIT(5) },
 168         [IMX8MQ_RESET_A53_CORE_RESET2]          = { SRC_A53RCR0, BIT(6) },
 169         [IMX8MQ_RESET_A53_CORE_RESET3]          = { SRC_A53RCR0, BIT(7) },
 170         [IMX8MQ_RESET_A53_DBG_RESET0]           = { SRC_A53RCR0, BIT(8) },
 171         [IMX8MQ_RESET_A53_DBG_RESET1]           = { SRC_A53RCR0, BIT(9) },
 172         [IMX8MQ_RESET_A53_DBG_RESET2]           = { SRC_A53RCR0, BIT(10) },
 173         [IMX8MQ_RESET_A53_DBG_RESET3]           = { SRC_A53RCR0, BIT(11) },
 174         [IMX8MQ_RESET_A53_ETM_RESET0]           = { SRC_A53RCR0, BIT(12) },
 175         [IMX8MQ_RESET_A53_ETM_RESET1]           = { SRC_A53RCR0, BIT(13) },
 176         [IMX8MQ_RESET_A53_ETM_RESET2]           = { SRC_A53RCR0, BIT(14) },
 177         [IMX8MQ_RESET_A53_ETM_RESET3]           = { SRC_A53RCR0, BIT(15) },
 178         [IMX8MQ_RESET_A53_SOC_DBG_RESET]        = { SRC_A53RCR0, BIT(20) },
 179         [IMX8MQ_RESET_A53_L2RESET]              = { SRC_A53RCR0, BIT(21) },
 180         [IMX8MQ_RESET_SW_NON_SCLR_M4C_RST]      = { SRC_M4RCR, BIT(0) },
 181         [IMX8MQ_RESET_SW_M4C_RST]               = { SRC_M4RCR, BIT(1) },
 182         [IMX8MQ_RESET_SW_M4P_RST]               = { SRC_M4RCR, BIT(2) },
 183         [IMX8MQ_RESET_M4_ENABLE]                = { SRC_M4RCR, BIT(3) },
 184         [IMX8MQ_RESET_OTG1_PHY_RESET]           = { SRC_USBOPHY1_RCR, BIT(0) },
 185         [IMX8MQ_RESET_OTG2_PHY_RESET]           = { SRC_USBOPHY2_RCR, BIT(0) },
 186         [IMX8MQ_RESET_MIPI_DSI_RESET_BYTE_N]    = { SRC_MIPIPHY_RCR, BIT(1) },
 187         [IMX8MQ_RESET_MIPI_DSI_RESET_N]         = { SRC_MIPIPHY_RCR, BIT(2) },
 188         [IMX8MQ_RESET_MIPI_DSI_DPI_RESET_N]     = { SRC_MIPIPHY_RCR, BIT(3) },
 189         [IMX8MQ_RESET_MIPI_DSI_ESC_RESET_N]     = { SRC_MIPIPHY_RCR, BIT(4) },
 190         [IMX8MQ_RESET_MIPI_DSI_PCLK_RESET_N]    = { SRC_MIPIPHY_RCR, BIT(5) },
 191         [IMX8MQ_RESET_PCIEPHY]                  = { SRC_PCIEPHY_RCR,
 192                                                     BIT(2) | BIT(1) },
 193         [IMX8MQ_RESET_PCIEPHY_PERST]            = { SRC_PCIEPHY_RCR, BIT(3) },
 194         [IMX8MQ_RESET_PCIE_CTRL_APPS_EN]        = { SRC_PCIEPHY_RCR, BIT(6) },
 195         [IMX8MQ_RESET_PCIE_CTRL_APPS_TURNOFF]   = { SRC_PCIEPHY_RCR, BIT(11) },
 196         [IMX8MQ_RESET_HDMI_PHY_APB_RESET]       = { SRC_HDMI_RCR, BIT(0) },
 197         [IMX8MQ_RESET_DISP_RESET]               = { SRC_DISP_RCR, BIT(0) },
 198         [IMX8MQ_RESET_GPU_RESET]                = { SRC_GPU_RCR, BIT(0) },
 199         [IMX8MQ_RESET_VPU_RESET]                = { SRC_VPU_RCR, BIT(0) },
 200         [IMX8MQ_RESET_PCIEPHY2]                 = { SRC_PCIE2_RCR,
 201                                                     BIT(2) | BIT(1) },
 202         [IMX8MQ_RESET_PCIEPHY2_PERST]           = { SRC_PCIE2_RCR, BIT(3) },
 203         [IMX8MQ_RESET_PCIE2_CTRL_APPS_EN]       = { SRC_PCIE2_RCR, BIT(6) },
 204         [IMX8MQ_RESET_PCIE2_CTRL_APPS_TURNOFF]  = { SRC_PCIE2_RCR, BIT(11) },
 205         [IMX8MQ_RESET_MIPI_CSI1_CORE_RESET]     = { SRC_MIPIPHY1_RCR, BIT(0) },
 206         [IMX8MQ_RESET_MIPI_CSI1_PHY_REF_RESET]  = { SRC_MIPIPHY1_RCR, BIT(1) },
 207         [IMX8MQ_RESET_MIPI_CSI1_ESC_RESET]      = { SRC_MIPIPHY1_RCR, BIT(2) },
 208         [IMX8MQ_RESET_MIPI_CSI2_CORE_RESET]     = { SRC_MIPIPHY2_RCR, BIT(0) },
 209         [IMX8MQ_RESET_MIPI_CSI2_PHY_REF_RESET]  = { SRC_MIPIPHY2_RCR, BIT(1) },
 210         [IMX8MQ_RESET_MIPI_CSI2_ESC_RESET]      = { SRC_MIPIPHY2_RCR, BIT(2) },
 211         [IMX8MQ_RESET_DDRC1_PRST]               = { SRC_DDRC_RCR, BIT(0) },
 212         [IMX8MQ_RESET_DDRC1_CORE_RESET]         = { SRC_DDRC_RCR, BIT(1) },
 213         [IMX8MQ_RESET_DDRC1_PHY_RESET]          = { SRC_DDRC_RCR, BIT(2) },
 214         [IMX8MQ_RESET_DDRC2_PHY_RESET]          = { SRC_DDRC2_RCR, BIT(0) },
 215         [IMX8MQ_RESET_DDRC2_CORE_RESET]         = { SRC_DDRC2_RCR, BIT(1) },
 216         [IMX8MQ_RESET_DDRC2_PRST]               = { SRC_DDRC2_RCR, BIT(2) },
 217 };
 218
 219 static int imx8mq_reset_set(struct reset_controller_dev *rcdev,
 220                             unsigned long id, bool assert)
 221 {
 222         struct imx7_src *imx7src = to_imx7_src(rcdev);
 223         const unsigned int bit = imx7src->signals[id].bit;
 224         unsigned int value = assert ? bit : 0;
 225
 226         switch (id) {
 227         case IMX8MQ_RESET_PCIEPHY:
 228         case IMX8MQ_RESET_PCIEPHY2:
 229                 /*
 230                  * wait for more than 10us to release phy g_rst and
 231                  * btnrst
 232                  */
 233                 if (!assert)
 234                         udelay(10);
 235                 break;
 236
 237         case IMX8MQ_RESET_PCIE_CTRL_APPS_EN:
 238         case IMX8MQ_RESET_PCIE2_CTRL_APPS_EN:
 239         case IMX8MQ_RESET_MIPI_DSI_PCLK_RESET_N:
 240         case IMX8MQ_RESET_MIPI_DSI_ESC_RESET_N:
 241         case IMX8MQ_RESET_MIPI_DSI_DPI_RESET_N:
 242         case IMX8MQ_RESET_MIPI_DSI_RESET_N:
 243         case IMX8MQ_RESET_MIPI_DSI_RESET_BYTE_N:
 244         case IMX8MQ_RESET_M4_ENABLE:
 245                 value = assert ? 0 : bit;
 246                 break;
 247         }
 248
 249         return imx7_reset_update(imx7src, id, value);
 250 }
 251
 252 static int imx8mq_reset_assert(struct reset_controller_dev *rcdev,
 253                                unsigned long id)
 254 {
 255         return imx8mq_reset_set(rcdev, id, true);
 256 }
 257
 258 static int imx8mq_reset_deassert(struct reset_controller_dev *rcdev,
 259                                  unsigned long id)
 260 {
 261         return imx8mq_reset_set(rcdev, id, false);
 262 }
 263
 264 static const struct imx7_src_variant variant_imx8mq = {
 265         .signals = imx8mq_src_signals,
 266         .signals_num = ARRAY_SIZE(imx8mq_src_signals),
 267         .ops = {
 268                 .assert   = imx8mq_reset_assert,
 269                 .deassert = imx8mq_reset_deassert,
 270         },
 271 };
 272
 273 static const struct imx7_src_signal imx8mp_src_signals[IMX8MP_RESET_NUM] = {
 274         [IMX8MP_RESET_A53_CORE_POR_RESET0]      = { SRC_A53RCR0, BIT(0) },
 275         [IMX8MP_RESET_A53_CORE_POR_RESET1]      = { SRC_A53RCR0, BIT(1) },
 276         [IMX8MP_RESET_A53_CORE_POR_RESET2]      = { SRC_A53RCR0, BIT(2) },
 277         [IMX8MP_RESET_A53_CORE_POR_RESET3]      = { SRC_A53RCR0, BIT(3) },
 278         [IMX8MP_RESET_A53_CORE_RESET0]          = { SRC_A53RCR0, BIT(4) },
 279         [IMX8MP_RESET_A53_CORE_RESET1]          = { SRC_A53RCR0, BIT(5) },
 280         [IMX8MP_RESET_A53_CORE_RESET2]          = { SRC_A53RCR0, BIT(6) },
 281         [IMX8MP_RESET_A53_CORE_RESET3]          = { SRC_A53RCR0, BIT(7) },
 282         [IMX8MP_RESET_A53_DBG_RESET0]           = { SRC_A53RCR0, BIT(8) },
 283         [IMX8MP_RESET_A53_DBG_RESET1]           = { SRC_A53RCR0, BIT(9) },
 284         [IMX8MP_RESET_A53_DBG_RESET2]           = { SRC_A53RCR0, BIT(10) },
 285         [IMX8MP_RESET_A53_DBG_RESET3]           = { SRC_A53RCR0, BIT(11) },
 286         [IMX8MP_RESET_A53_ETM_RESET0]           = { SRC_A53RCR0, BIT(12) },
 287         [IMX8MP_RESET_A53_ETM_RESET1]           = { SRC_A53RCR0, BIT(13) },
 288         [IMX8MP_RESET_A53_ETM_RESET2]           = { SRC_A53RCR0, BIT(14) },
 289         [IMX8MP_RESET_A53_ETM_RESET3]           = { SRC_A53RCR0, BIT(15) },
 290         [IMX8MP_RESET_A53_SOC_DBG_RESET]        = { SRC_A53RCR0, BIT(20) },
 291         [IMX8MP_RESET_A53_L2RESET]              = { SRC_A53RCR0, BIT(21) },
 292         [IMX8MP_RESET_SW_NON_SCLR_M7C_RST]      = { SRC_M4RCR, BIT(0) },
 293         [IMX8MP_RESET_OTG1_PHY_RESET]           = { SRC_USBOPHY1_RCR, BIT(0) },
 294         [IMX8MP_RESET_OTG2_PHY_RESET]           = { SRC_USBOPHY2_RCR, BIT(0) },
 295         [IMX8MP_RESET_SUPERMIX_RESET]           = { SRC_SUPERMIX_RCR, BIT(0) },
 296         [IMX8MP_RESET_AUDIOMIX_RESET]           = { SRC_AUDIOMIX_RCR, BIT(0) },
 297         [IMX8MP_RESET_MLMIX_RESET]              = { SRC_MLMIX_RCR, BIT(0) },
 298         [IMX8MP_RESET_PCIEPHY]                  = { SRC_PCIEPHY_RCR, BIT(2) },
 299         [IMX8MP_RESET_PCIEPHY_PERST]            = { SRC_PCIEPHY_RCR, BIT(3) },
 300         [IMX8MP_RESET_PCIE_CTRL_APPS_EN]        = { SRC_PCIEPHY_RCR, BIT(6) },
 301         [IMX8MP_RESET_PCIE_CTRL_APPS_TURNOFF]   = { SRC_PCIEPHY_RCR, BIT(11) },
 302         [IMX8MP_RESET_HDMI_PHY_APB_RESET]       = { SRC_HDMI_RCR, BIT(0) },
 303         [IMX8MP_RESET_MEDIA_RESET]              = { SRC_DISP_RCR, BIT(0) },
 304         [IMX8MP_RESET_GPU2D_RESET]              = { SRC_GPU2D_RCR, BIT(0) },
 305         [IMX8MP_RESET_GPU3D_RESET]              = { SRC_GPU3D_RCR, BIT(0) },
 306         [IMX8MP_RESET_GPU_RESET]                = { SRC_GPU_RCR, BIT(0) },
 307         [IMX8MP_RESET_VPU_RESET]                = { SRC_VPU_RCR, BIT(0) },
 308         [IMX8MP_RESET_VPU_G1_RESET]             = { SRC_VPU_G1_RCR, BIT(0) },
 309         [IMX8MP_RESET_VPU_G2_RESET]             = { SRC_VPU_G2_RCR, BIT(0) },
 310         [IMX8MP_RESET_VPUVC8KE_RESET]           = { SRC_VPUVC8KE_RCR, BIT(0) },
 311         [IMX8MP_RESET_NOC_RESET]                = { SRC_NOC_RCR, BIT(0) },
 312 };
 313
 314 static int imx8mp_reset_set(struct reset_controller_dev *rcdev,
 315                             unsigned long id, bool assert)
 316 {
 317         struct imx7_src *imx7src = to_imx7_src(rcdev);
 318         const unsigned int bit = imx7src->signals[id].bit;
 319         unsigned int value = assert ? bit : 0;
 320
 321         switch (id) {
 322         case IMX8MP_RESET_PCIEPHY:
 323                 /*
 324                  * wait for more than 10us to release phy g_rst and
 325                  * btnrst
 326                  */
 327                 if (!assert)
 328                         udelay(10);
 329                 break;
 330
 331         case IMX8MP_RESET_PCIE_CTRL_APPS_EN:
 332                 value = assert ? 0 : bit;
 333                 break;
 334         }
 335
 336         return imx7_reset_update(imx7src, id, value);
 337 }
 338
 339 static int imx8mp_reset_assert(struct reset_controller_dev *rcdev,
 340                                unsigned long id)
 341 {
 342         return imx8mp_reset_set(rcdev, id, true);
 343 }
 344
 345 static int imx8mp_reset_deassert(struct reset_controller_dev *rcdev,
 346                                  unsigned long id)
 347 {
 348         return imx8mp_reset_set(rcdev, id, false);
 349 }
 350
 351 static const struct imx7_src_variant variant_imx8mp = {
 352         .signals = imx8mp_src_signals,
 353         .signals_num = ARRAY_SIZE(imx8mp_src_signals),
 354         .ops = {
 355                 .assert   = imx8mp_reset_assert,
 356                 .deassert = imx8mp_reset_deassert,
 357         },
 358 };
 359
 360 static int imx7_reset_probe(struct platform_device *pdev)
 361 {
 362         struct imx7_src *imx7src;
 363         struct device *dev = &pdev->dev;
 364         struct regmap_config config = { .name = "src" };
 365         const struct imx7_src_variant *variant = of_device_get_match_data(dev);
 366
 367         imx7src = devm_kzalloc(dev, sizeof(*imx7src), GFP_KERNEL);
 368         if (!imx7src)
 369                 return -ENOMEM;
 370
 371         imx7src->signals = variant->signals;
 372         imx7src->regmap = syscon_node_to_regmap(dev->of_node);
 373         if (IS_ERR(imx7src->regmap)) {
 374                 dev_err(dev, "Unable to get imx7-src regmap");
 375                 return PTR_ERR(imx7src->regmap);
 376         }
 377         regmap_attach_dev(dev, imx7src->regmap, &config);
 378
 379         imx7src->rcdev.owner     = THIS_MODULE;
 380         imx7src->rcdev.nr_resets = variant->signals_num;
 381         imx7src->rcdev.ops       = &variant->ops;
 382         imx7src->rcdev.of_node   = dev->of_node;
 383
 384         return devm_reset_controller_register(dev, &imx7src->rcdev);
 385 }
 386
 387 static const struct of_device_id imx7_reset_dt_ids[] = {
 388         { .compatible = "fsl,imx7d-src", .data = &variant_imx7 },
 389         { .compatible = "fsl,imx8mq-src", .data = &variant_imx8mq },
 390         { .compatible = "fsl,imx8mp-src", .data = &variant_imx8mp },
 391         { /* sentinel */ },
 392 };
 393 MODULE_DEVICE_TABLE(of, imx7_reset_dt_ids);
 394
 395 static struct platform_driver imx7_reset_driver = {
 396         .probe  = imx7_reset_probe,
 397         .driver = {
 398                 .name           = KBUILD_MODNAME,
 399                 .of_match_table = imx7_reset_dt_ids,
 400         },
 401 };
 402 module_platform_driver(imx7_reset_driver);
 403
 404 MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>");
 405 MODULE_DESCRIPTION("NXP i.MX7 reset driver");
 406 MODULE_LICENSE("GPL v2");