target/linux/bcm53xx/patches-3.18/111-bcm47xx-nvram-add-new-nvram-driver-with-dt-support.patch

   1 From 71a6bff8656a1713615ffdd9139a83d65ba46c6d Mon Sep 17 00:00:00 2001
   2 From: Hauke Mehrtens <hauke@hauke-m.de>
   3 Date: Sat, 3 May 2014 22:54:59 +0200
   4 Subject: [PATCH 02/17] bcm47xx-nvram: add new broadcom nvram driver with dt
   5  support
   6
   7 This adds a new driver which searches at a given memory range for a
   8 nvram like it is used on the bcm47xx and bcm53xx SoCs with ARM and MIPS
   9 CPUs. This driver provides acces to this nvram to other device in the
  10 device tree. You have to specify the memory ranges where the content of
  11 the flash chip is memory mapped and this driver will search there for
  12 some nvram and parse it. Other drivers can use this driver to access the
  13 device nvram. The nvram is used to store board configurations like the
  14 mac addresses, the switch configuration and the calibration data for
  15 the wifi devices.
  16
  17 This was copied from arch/mips/bcm47xx/nvram.c and modified to interact
  18 with device tree. My plan is to make the MIPS bcm47xx also use this new
  19 driver some time later.
  20
  21 Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
  22 ---
  23  .../devicetree/bindings/misc/bcm47xx-nvram.txt     |  19 ++
  24  arch/mips/bcm47xx/board.c                          |  40 ++--
  25  arch/mips/bcm47xx/nvram.c                          |   7 +-
  26  arch/mips/bcm47xx/setup.c                          |   4 +-
  27  arch/mips/bcm47xx/sprom.c                          |   4 +-
  28  arch/mips/bcm47xx/time.c                           |   2 +-
  29  drivers/misc/Kconfig                               |   5 +
  30  drivers/misc/Makefile                              |   1 +
  31  drivers/misc/bcm47xx-nvram.c                       | 215 +++++++++++++++++++++
  32  drivers/net/ethernet/broadcom/b44.c                |   2 +-
  33  drivers/net/ethernet/broadcom/bgmac.c              |   5 +-
  34  drivers/ssb/driver_chipcommon_pmu.c                |   3 +-
  35  include/linux/bcm47xx_nvram.h                      |  17 +-
  36  13 files changed, 286 insertions(+), 38 deletions(-)
  37  create mode 100644 Documentation/devicetree/bindings/misc/bcm47xx-nvram.txt
  38  create mode 100644 drivers/misc/bcm47xx-nvram.c
  39
  40 --- /dev/null
  41 +++ b/Documentation/devicetree/bindings/misc/bcm47xx-nvram.txt
  42 @@ -0,0 +1,19 @@
  43 +Broadcom bcm47xx/bcm53xx nvram access driver
  44 +
  45 +This driver provides access to the nvram for other drivers.
  46 +
  47 +Required properties:
  48 +
  49 +- compatible : brcm,bcm47xx-nvram
  50 +
  51 +- reg : iomem address range
  52 +
  53 +On NorthStar ARM SoCs the NAND flash is available at 0x1c000000 and the
  54 +NOR flash is at 0x1e000000
  55 +
  56 +Example:
  57 +
  58 +nvram0: nvram@0 {
  59 +       compatible = "brcm,bcm47xx-nvram";
  60 +       reg = <0x1c000000 0x01000000>;
  61 +};
  62 --- a/arch/mips/bcm47xx/board.c
  63 +++ b/arch/mips/bcm47xx/board.c
  64 @@ -218,36 +218,36 @@ static __init const struct bcm47xx_board
  65         const struct bcm47xx_board_type_list2 *e2;
  66         const struct bcm47xx_board_type_list3 *e3;
  67
  68 -       if (bcm47xx_nvram_getenv("model_name", buf1, sizeof(buf1)) >= 0) {
  69 +       if (bcm47xx_nvram_getenv(NULL, "model_name", buf1, sizeof(buf1)) >= 0) {
  70                 for (e1 = bcm47xx_board_list_model_name; e1->value1; e1++) {
  71                         if (!strcmp(buf1, e1->value1))
  72                                 return &e1->board;
  73                 }
  74         }
  75
  76 -       if (bcm47xx_nvram_getenv("model_no", buf1, sizeof(buf1)) >= 0) {
  77 +       if (bcm47xx_nvram_getenv(NULL, "model_no", buf1, sizeof(buf1)) >= 0) {
  78                 for (e1 = bcm47xx_board_list_model_no; e1->value1; e1++) {
  79                         if (strstarts(buf1, e1->value1))
  80                                 return &e1->board;
  81                 }
  82         }
  83
  84 -       if (bcm47xx_nvram_getenv("machine_name", buf1, sizeof(buf1)) >= 0) {
  85 +       if (bcm47xx_nvram_getenv(NULL, "machine_name", buf1, sizeof(buf1)) >= 0) {
  86                 for (e1 = bcm47xx_board_list_machine_name; e1->value1; e1++) {
  87                         if (strstarts(buf1, e1->value1))
  88                                 return &e1->board;
  89                 }
  90         }
  91
  92 -       if (bcm47xx_nvram_getenv("hardware_version", buf1, sizeof(buf1)) >= 0) {
  93 +       if (bcm47xx_nvram_getenv(NULL, "hardware_version", buf1, sizeof(buf1)) >= 0) {
  94                 for (e1 = bcm47xx_board_list_hardware_version; e1->value1; e1++) {
  95                         if (strstarts(buf1, e1->value1))
  96                                 return &e1->board;
  97                 }
  98         }
  99
 100 -       if (bcm47xx_nvram_getenv("hardware_version", buf1, sizeof(buf1)) >= 0 &&
 101 -           bcm47xx_nvram_getenv("boardtype", buf2, sizeof(buf2)) >= 0) {
 102 +       if (bcm47xx_nvram_getenv(NULL, "hardware_version", buf1, sizeof(buf1)) >= 0 &&
 103 +           bcm47xx_nvram_getenv(NULL, "boardtype", buf2, sizeof(buf2)) >= 0) {
 104                 for (e2 = bcm47xx_board_list_boot_hw; e2->value1; e2++) {
 105                         if (!strstarts(buf1, e2->value1) &&
 106                             !strcmp(buf2, e2->value2))
 107 @@ -255,22 +255,22 @@ static __init const struct bcm47xx_board
 108                 }
 109         }
 110
 111 -       if (bcm47xx_nvram_getenv("productid", buf1, sizeof(buf1)) >= 0) {
 112 +       if (bcm47xx_nvram_getenv(NULL, "productid", buf1, sizeof(buf1)) >= 0) {
 113                 for (e1 = bcm47xx_board_list_productid; e1->value1; e1++) {
 114                         if (!strcmp(buf1, e1->value1))
 115                                 return &e1->board;
 116                 }
 117         }
 118
 119 -       if (bcm47xx_nvram_getenv("ModelId", buf1, sizeof(buf1)) >= 0) {
 120 +       if (bcm47xx_nvram_getenv(NULL, "ModelId", buf1, sizeof(buf1)) >= 0) {
 121                 for (e1 = bcm47xx_board_list_ModelId; e1->value1; e1++) {
 122                         if (!strcmp(buf1, e1->value1))
 123                                 return &e1->board;
 124                 }
 125         }
 126
 127 -       if (bcm47xx_nvram_getenv("melco_id", buf1, sizeof(buf1)) >= 0 ||
 128 -           bcm47xx_nvram_getenv("buf1falo_id", buf1, sizeof(buf1)) >= 0) {
 129 +       if (bcm47xx_nvram_getenv(NULL, "melco_id", buf1, sizeof(buf1)) >= 0 ||
 130 +           bcm47xx_nvram_getenv(NULL, "buf1falo_id", buf1, sizeof(buf1)) >= 0) {
 131                 /* buffalo hardware, check id for specific hardware matches */
 132                 for (e1 = bcm47xx_board_list_melco_id; e1->value1; e1++) {
 133                         if (!strcmp(buf1, e1->value1))
 134 @@ -278,8 +278,8 @@ static __init const struct bcm47xx_board
 135                 }
 136         }
 137
 138 -       if (bcm47xx_nvram_getenv("boot_hw_model", buf1, sizeof(buf1)) >= 0 &&
 139 -           bcm47xx_nvram_getenv("boot_hw_ver", buf2, sizeof(buf2)) >= 0) {
 140 +       if (bcm47xx_nvram_getenv(NULL, "boot_hw_model", buf1, sizeof(buf1)) >= 0 &&
 141 +           bcm47xx_nvram_getenv(NULL, "boot_hw_ver", buf2, sizeof(buf2)) >= 0) {
 142                 for (e2 = bcm47xx_board_list_boot_hw; e2->value1; e2++) {
 143                         if (!strcmp(buf1, e2->value1) &&
 144                             !strcmp(buf2, e2->value2))
 145 @@ -287,16 +287,16 @@ static __init const struct bcm47xx_board
 146                 }
 147         }
 148
 149 -       if (bcm47xx_nvram_getenv("board_id", buf1, sizeof(buf1)) >= 0) {
 150 +       if (bcm47xx_nvram_getenv(NULL, "board_id", buf1, sizeof(buf1)) >= 0) {
 151                 for (e1 = bcm47xx_board_list_board_id; e1->value1; e1++) {
 152                         if (!strcmp(buf1, e1->value1))
 153                                 return &e1->board;
 154                 }
 155         }
 156
 157 -       if (bcm47xx_nvram_getenv("boardtype", buf1, sizeof(buf1)) >= 0 &&
 158 -           bcm47xx_nvram_getenv("boardnum", buf2, sizeof(buf2)) >= 0 &&
 159 -           bcm47xx_nvram_getenv("boardrev", buf3, sizeof(buf3)) >= 0) {
 160 +       if (bcm47xx_nvram_getenv(NULL, "boardtype", buf1, sizeof(buf1)) >= 0 &&
 161 +           bcm47xx_nvram_getenv(NULL, "boardnum", buf2, sizeof(buf2)) >= 0 &&
 162 +           bcm47xx_nvram_getenv(NULL, "boardrev", buf3, sizeof(buf3)) >= 0) {
 163                 for (e3 = bcm47xx_board_list_board; e3->value1; e3++) {
 164                         if (!strcmp(buf1, e3->value1) &&
 165                             !strcmp(buf2, e3->value2) &&
 166 @@ -305,9 +305,9 @@ static __init const struct bcm47xx_board
 167                 }
 168         }
 169
 170 -       if (bcm47xx_nvram_getenv("boardtype", buf1, sizeof(buf1)) >= 0 &&
 171 -           bcm47xx_nvram_getenv("boardrev", buf2, sizeof(buf2)) >= 0 &&
 172 -           bcm47xx_nvram_getenv("boardnum", buf3, sizeof(buf3)) ==  -ENOENT) {
 173 +       if (bcm47xx_nvram_getenv(NULL, "boardtype", buf1, sizeof(buf1)) >= 0 &&
 174 +           bcm47xx_nvram_getenv(NULL, "boardrev", buf2, sizeof(buf2)) >= 0 &&
 175 +           bcm47xx_nvram_getenv(NULL, "boardnum", buf3, sizeof(buf3)) ==  -ENOENT) {
 176                 for (e2 = bcm47xx_board_list_board_type_rev; e2->value1; e2++) {
 177                         if (!strcmp(buf1, e2->value1) &&
 178                             !strcmp(buf2, e2->value2))
 179 @@ -327,7 +327,7 @@ void __init bcm47xx_board_detect(void)
 180                 return;
 181
 182         /* check if the nvram is available */
 183 -       err = bcm47xx_nvram_getenv("boardtype", buf, sizeof(buf));
 184 +       err = bcm47xx_nvram_getenv(NULL, "boardtype", buf, sizeof(buf));
 185
 186         /* init of nvram failed, probably too early now */
 187         if (err == -ENXIO) {
 188 --- a/arch/mips/bcm47xx/nvram.c
 189 +++ b/arch/mips/bcm47xx/nvram.c
 190 @@ -158,7 +158,8 @@ static int nvram_init(void)
 191         return -ENXIO;
 192  }
 193
 194 -int bcm47xx_nvram_getenv(char *name, char *val, size_t val_len)
 195 +int bcm47xx_nvram_getenv(const struct device *dev, const char *name, char *val,
 196 +                        size_t val_len)
 197  {
 198         char *var, *value, *end, *eq;
 199         int err;
 200 @@ -190,7 +191,7 @@ int bcm47xx_nvram_getenv(char *name, cha
 201  }
 202  EXPORT_SYMBOL(bcm47xx_nvram_getenv);
 203
 204 -int bcm47xx_nvram_gpio_pin(const char *name)
 205 +int bcm47xx_nvram_gpio_pin(const struct device *dev, const char *name)
 206  {
 207         int i, err;
 208         char nvram_var[10];
 209 @@ -200,7 +201,7 @@ int bcm47xx_nvram_gpio_pin(const char *n
 210                 err = snprintf(nvram_var, sizeof(nvram_var), "gpio%i", i);
 211                 if (err <= 0)
 212                         continue;
 213 -               err = bcm47xx_nvram_getenv(nvram_var, buf, sizeof(buf));
 214 +               err = bcm47xx_nvram_getenv(dev, nvram_var, buf, sizeof(buf));
 215                 if (err <= 0)
 216                         continue;
 217                 if (!strcmp(name, buf))
 218 --- a/arch/mips/bcm47xx/setup.c
 219 +++ b/arch/mips/bcm47xx/setup.c
 220 @@ -132,7 +132,7 @@ static int bcm47xx_get_invariants(struct
 221         memset(&iv->sprom, 0, sizeof(struct ssb_sprom));
 222         bcm47xx_fill_sprom(&iv->sprom, NULL, false);
 223
 224 -       if (bcm47xx_nvram_getenv("cardbus", buf, sizeof(buf)) >= 0)
 225 +       if (bcm47xx_nvram_getenv(NULL, "cardbus", buf, sizeof(buf)) >= 0)
 226                 iv->has_cardbus_slot = !!simple_strtoul(buf, NULL, 10);
 227
 228         return 0;
 229 @@ -155,7 +155,7 @@ static void __init bcm47xx_register_ssb(
 230                 panic("Failed to initialize SSB bus (err %d)", err);
 231
 232         mcore = &bcm47xx_bus.ssb.mipscore;
 233 -       if (bcm47xx_nvram_getenv("kernel_args", buf, sizeof(buf)) >= 0) {
 234 +       if (bcm47xx_nvram_getenv(NULL, "kernel_args", buf, sizeof(buf)) >= 0) {
 235                 if (strstr(buf, "console=ttyS1")) {
 236                         struct ssb_serial_port port;
 237
 238 --- a/arch/mips/bcm47xx/sprom.c
 239 +++ b/arch/mips/bcm47xx/sprom.c
 240 @@ -52,10 +52,10 @@ static int get_nvram_var(const char *pre
 241
 242         create_key(prefix, postfix, name, key, sizeof(key));
 243
 244 -       err = bcm47xx_nvram_getenv(key, buf, len);
 245 +       err = bcm47xx_nvram_getenv(NULL, key, buf, len);
 246         if (fallback && err == -ENOENT && prefix) {
 247                 create_key(NULL, postfix, name, key, sizeof(key));
 248 -               err = bcm47xx_nvram_getenv(key, buf, len);
 249 +               err = bcm47xx_nvram_getenv(NULL, key, buf, len);
 250         }
 251         return err;
 252  }
 253 --- a/arch/mips/bcm47xx/time.c
 254 +++ b/arch/mips/bcm47xx/time.c
 255 @@ -61,7 +61,7 @@ void __init plat_time_init(void)
 256         }
 257
 258         if (chip_id == 0x5354) {
 259 -               len = bcm47xx_nvram_getenv("clkfreq", buf, sizeof(buf));
 260 +               len = bcm47xx_nvram_getenv(NULL, "clkfreq", buf, sizeof(buf));
 261                 if (len >= 0 && !strncmp(buf, "200", 4))
 262                         hz = 100000000;
 263         }
 264 --- a/drivers/misc/Kconfig
 265 +++ b/drivers/misc/Kconfig
 266 @@ -515,6 +515,11 @@ config VEXPRESS_SYSCFG
 267           bus. System Configuration interface is one of the possible means
 268           of generating transactions on this bus.
 269
 270 +config BCM47XX_NVRAM
 271 +       tristate "BCM47XX nvram driver"
 272 +       help
 273 +               This adds support for the brcm47xx nvram driver.
 274 +
 275  source "drivers/misc/c2port/Kconfig"
 276  source "drivers/misc/eeprom/Kconfig"
 277  source "drivers/misc/cb710/Kconfig"
 278 --- a/drivers/misc/Makefile
 279 +++ b/drivers/misc/Makefile
 280 @@ -56,3 +56,4 @@ obj-$(CONFIG_GENWQE)          += genwqe/
 281  obj-$(CONFIG_ECHO)             += echo/
 282  obj-$(CONFIG_VEXPRESS_SYSCFG)  += vexpress-syscfg.o
 283  obj-$(CONFIG_CXL_BASE)         += cxl/
 284 +obj-$(CONFIG_BCM47XX_NVRAM)    += bcm47xx-nvram.o
 285 --- /dev/null
 286 +++ b/drivers/misc/bcm47xx-nvram.c
 287 @@ -0,0 +1,215 @@
 288 +/*
 289 + * BCM947xx nvram variable access
 290 + *
 291 + * Copyright (C) 2005 Broadcom Corporation
 292 + * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
 293 + * Copyright (C) 2010-2014 Hauke Mehrtens <hauke@hauke-m.de>
 294 + *
 295 + * This program is free software; you can redistribute it and/or modify it
 296 + * under  the terms of the GNU General  Public License as published by the
 297 + * Free Software Foundation;  either version 2 of the  License, or (at your
 298 + * option) any later version.
 299 + */
 300 +
 301 +#include <linux/types.h>
 302 +#include <linux/module.h>
 303 +#include <linux/kernel.h>
 304 +#include <linux/string.h>
 305 +#include <linux/of_address.h>
 306 +#include <linux/device.h>
 307 +#include <linux/platform_device.h>
 308 +#include <linux/io.h>
 309 +#include <linux/bcm47xx_nvram.h>
 310 +
 311 +struct bcm47xx_nvram {
 312 +       size_t nvram_len;
 313 +       char *nvram_buf;
 314 +};
 315 +
 316 +static const u32 nvram_sizes[] = {0x8000, 0xF000, 0x10000};
 317 +
 318 +static u32 find_nvram_size(void __iomem *end)
 319 +{
 320 +       struct nvram_header __iomem *header;
 321 +       int i;
 322 +
 323 +       for (i = 0; i < ARRAY_SIZE(nvram_sizes); i++) {
 324 +               header = (struct nvram_header __iomem *)(end - nvram_sizes[i]);
 325 +               if (__raw_readl(&header->magic) == NVRAM_HEADER)
 326 +                       return nvram_sizes[i];
 327 +       }
 328 +
 329 +       return 0;
 330 +}
 331 +
 332 +/* Probe for NVRAM header */
 333 +static int nvram_find_and_copy(struct device *dev, void __iomem *base,
 334 +                              size_t len, char **nvram_buf,
 335 +                              size_t *nvram_len)
 336 +{
 337 +       struct nvram_header __iomem *header;
 338 +       int i;
 339 +       u32 off;
 340 +       u32 *dst;
 341 +       __le32 __iomem *src;
 342 +       u32 size;
 343 +
 344 +       /* TODO: when nvram is on nand flash check for bad blocks first. */
 345 +       off = FLASH_MIN;
 346 +       while (off <= len) {
 347 +               /* Windowed flash access */
 348 +               size = find_nvram_size(base + off);
 349 +               if (size) {
 350 +                       header = (struct nvram_header __iomem *)
 351 +                                       (base + off - size);
 352 +                       goto found;
 353 +               }
 354 +               off += 0x10000;
 355 +       }
 356 +
 357 +       /* Try embedded NVRAM at 4 KB and 1 KB as last resorts */
 358 +       header = (struct nvram_header __iomem *)(base + 4096);
 359 +       if (__raw_readl(&header->magic) == NVRAM_HEADER) {
 360 +               size = NVRAM_SPACE;
 361 +               goto found;
 362 +       }
 363 +
 364 +       header = (struct nvram_header __iomem *)(base + 1024);
 365 +       if (__raw_readl(&header->magic) == NVRAM_HEADER) {
 366 +               size = NVRAM_SPACE;
 367 +               goto found;
 368 +       }
 369 +
 370 +       *nvram_buf = NULL;
 371 +       *nvram_len = 0;
 372 +       pr_err("no nvram found\n");
 373 +       return -ENXIO;
 374 +
 375 +found:
 376 +       if (readl(&header->len) > size)
 377 +               pr_err("The nvram size accoridng to the header seems to be bigger than the partition on flash\n");
 378 +       *nvram_len = min_t(u32, readl(&header->len), size);
 379 +
 380 +       *nvram_buf = devm_kzalloc(dev, *nvram_len, GFP_KERNEL);
 381 +       if (!*nvram_buf)
 382 +               return -ENOMEM;
 383 +
 384 +       src = (__le32 __iomem *) header;
 385 +       dst = (u32 *) *nvram_buf;
 386 +       for (i = 0; i < sizeof(struct nvram_header); i += 4)
 387 +               *dst++ = __raw_readl(src++);
 388 +       for (; i < *nvram_len; i += 4)
 389 +               *dst++ = readl(src++);
 390 +
 391 +       return 0;
 392 +}
 393 +
 394 +int bcm47xx_nvram_getenv(const struct device *dev, const char *name, char *val,
 395 +                        size_t val_len)
 396 +{
 397 +       char *var, *value, *end, *eq;
 398 +       struct bcm47xx_nvram *nvram;
 399 +
 400 +       if (!dev)
 401 +               return -ENODEV;
 402 +
 403 +       nvram = dev_get_drvdata(dev);
 404 +
 405 +       if (!name || !nvram || !nvram->nvram_len)
 406 +               return -EINVAL;
 407 +
 408 +       /* Look for name=value and return value */
 409 +       var = nvram->nvram_buf + sizeof(struct nvram_header);
 410 +       end = nvram->nvram_buf + nvram->nvram_len - 2;
 411 +       end[0] = end[1] = '\0';
 412 +       for (; *var; var = value + strlen(value) + 1) {
 413 +               eq = strchr(var, '=');
 414 +               if (!eq)
 415 +                       break;
 416 +               value = eq + 1;
 417 +               if ((eq - var) == strlen(name) &&
 418 +                       strncmp(var, name, (eq - var)) == 0) {
 419 +                       return snprintf(val, val_len, "%s", value);
 420 +               }
 421 +       }
 422 +       return -ENOENT;
 423 +}
 424 +EXPORT_SYMBOL(bcm47xx_nvram_getenv);
 425 +
 426 +int bcm47xx_nvram_gpio_pin(const struct device *dev, const char *name)
 427 +{
 428 +       int i, err;
 429 +       char nvram_var[10];
 430 +       char buf[30];
 431 +
 432 +       if (!dev)
 433 +               return -ENODEV;
 434 +
 435 +       for (i = 0; i < 32; i++) {
 436 +               err = snprintf(nvram_var, sizeof(nvram_var), "gpio%i", i);
 437 +               if (err <= 0)
 438 +                       continue;
 439 +               err = bcm47xx_nvram_getenv(dev, nvram_var, buf, sizeof(buf));
 440 +               if (err <= 0)
 441 +                       continue;
 442 +               if (!strcmp(name, buf))
 443 +                       return i;
 444 +       }
 445 +       return -ENOENT;
 446 +}
 447 +EXPORT_SYMBOL(bcm47xx_nvram_gpio_pin);
 448 +
 449 +static int bcm47xx_nvram_probe(struct platform_device *pdev)
 450 +{
 451 +       struct device *dev = &pdev->dev;
 452 +       struct device_node *np = dev->of_node;
 453 +       struct bcm47xx_nvram *nvram;
 454 +       int err;
 455 +       struct resource flash_mem;
 456 +       void __iomem *mmio;
 457 +
 458 +       /* Alloc */
 459 +       nvram = devm_kzalloc(dev, sizeof(*nvram), GFP_KERNEL);
 460 +       if (!nvram)
 461 +               return -ENOMEM;
 462 +
 463 +       err = of_address_to_resource(np, 0, &flash_mem);
 464 +       if (err)
 465 +               return err;
 466 +
 467 +       mmio = ioremap_nocache(flash_mem.start, resource_size(&flash_mem));
 468 +       if (!mmio)
 469 +               return -ENOMEM;
 470 +
 471 +       err = nvram_find_and_copy(dev, mmio, resource_size(&flash_mem),
 472 +                                 &nvram->nvram_buf, &nvram->nvram_len);
 473 +       if (err)
 474 +               goto err_unmap_mmio;
 475 +
 476 +       platform_set_drvdata(pdev, nvram);
 477 +
 478 +err_unmap_mmio:
 479 +       iounmap(mmio);
 480 +       return err;
 481 +}
 482 +
 483 +static const struct of_device_id bcm47xx_nvram_of_match_table[] = {
 484 +       { .compatible = "brcm,bcm47xx-nvram", },
 485 +       {},
 486 +};
 487 +MODULE_DEVICE_TABLE(of, mvebu_pcie_of_match_table);
 488 +
 489 +static struct platform_driver bcm47xx_nvram_driver = {
 490 +       .driver = {
 491 +               .owner = THIS_MODULE,
 492 +               .name = "bcm47xx-nvram",
 493 +               .of_match_table = bcm47xx_nvram_of_match_table,
 494 +               /* driver unloading/unbinding currently not supported */
 495 +               .suppress_bind_attrs = true,
 496 +       },
 497 +       .probe = bcm47xx_nvram_probe,
 498 +};
 499 +module_platform_driver(bcm47xx_nvram_driver);
 500 +
 501 +MODULE_AUTHOR("Hauke Mehrtens <hauke@hauke-m.de>");
 502 +MODULE_LICENSE("GPLv2");
 503 --- a/drivers/net/ethernet/broadcom/b44.c
 504 +++ b/drivers/net/ethernet/broadcom/b44.c
 505 @@ -411,7 +411,7 @@ static void b44_wap54g10_workaround(stru
 506          * see https://dev.openwrt.org/ticket/146
 507          * check and reset bit "isolate"
 508          */
 509 -       if (bcm47xx_nvram_getenv("boardnum", buf, sizeof(buf)) < 0)
 510 +       if (bcm47xx_nvram_getenv(NULL, "boardnum", buf, sizeof(buf)) < 0)
 511                 return;
 512         if (simple_strtoul(buf, NULL, 0) == 2) {
 513                 err = __b44_readphy(bp, 0, MII_BMCR, &val);
 514 --- a/drivers/net/ethernet/broadcom/bgmac.c
 515 +++ b/drivers/net/ethernet/broadcom/bgmac.c
 516 @@ -974,7 +974,8 @@ static void bgmac_chip_reset(struct bgma
 517                              BGMAC_CHIPCTL_1_IF_TYPE_MII;
 518                 char buf[4];
 519
 520 -               if (bcm47xx_nvram_getenv("et_swtype", buf, sizeof(buf)) > 0) {
 521 +               if (bcm47xx_nvram_getenv(NULL, "et_swtype", buf,
 522 +                                        sizeof(buf)) > 0) {
 523                         if (kstrtou8(buf, 0, &et_swtype))
 524                                 bgmac_err(bgmac, "Failed to parse et_swtype (%s)\n",
 525                                           buf);
 526 @@ -1534,7 +1535,7 @@ static int bgmac_probe(struct bcma_devic
 527         }
 528
 529         bgmac->int_mask = BGMAC_IS_ERRMASK | BGMAC_IS_RX | BGMAC_IS_TX_MASK;
 530 -       if (bcm47xx_nvram_getenv("et0_no_txint", NULL, 0) == 0)
 531 +       if (bcm47xx_nvram_getenv(NULL, "et0_no_txint", NULL, 0) == 0)
 532                 bgmac->int_mask &= ~BGMAC_IS_TX_MASK;
 533
 534         /* TODO: reset the external phy. Specs are needed */
 535 --- a/drivers/ssb/driver_chipcommon_pmu.c
 536 +++ b/drivers/ssb/driver_chipcommon_pmu.c
 537 @@ -319,7 +319,8 @@ static void ssb_pmu_pll_init(struct ssb_
 538
 539         if (bus->bustype == SSB_BUSTYPE_SSB) {
 540                 char buf[20];
 541 -               if (bcm47xx_nvram_getenv("xtalfreq", buf, sizeof(buf)) >= 0)
 542 +               if (bcm47xx_nvram_getenv(NULL, "xtalfreq", buf,
 543 +                                        sizeof(buf)) >= 0)
 544                         crystalfreq = simple_strtoul(buf, NULL, 0);
 545         }
 546
 547 --- a/include/linux/bcm47xx_nvram.h
 548 +++ b/include/linux/bcm47xx_nvram.h
 549 @@ -15,9 +15,11 @@
 550  #include <linux/types.h>
 551  #include <linux/kernel.h>
 552
 553 +struct device;
 554 +
 555  struct nvram_header {
 556         u32 magic;
 557 -       u32 len;
 558 +       __le32 len;
 559         u32 crc_ver_init;       /* 0:7 crc, 8:15 ver, 16:31 sdram_init */
 560         u32 config_refresh;     /* 0:15 sdram_config, 16:31 sdram_refresh */
 561         u32 config_ncdl;        /* ncdl values for memc */
 562 @@ -33,18 +35,21 @@ struct nvram_header {
 563  #define NVRAM_MAX_VALUE_LEN 255
 564  #define NVRAM_MAX_PARAM_LEN 64
 565
 566 -#ifdef CONFIG_BCM47XX
 567 -int bcm47xx_nvram_getenv(const char *name, char *val, size_t val_len);
 568 +#if defined(CONFIG_BCM47XX) || defined(CONFIG_BCM47XX_NVRAM)
 569 +int bcm47xx_nvram_getenv(const struct device *dev, const char *name, char *val,
 570 +                        size_t val_len);
 571
 572 -int bcm47xx_nvram_gpio_pin(const char *name);
 573 +int bcm47xx_nvram_gpio_pin(const struct device *dev, const char *name);
 574  #else
 575 -static inline int bcm47xx_nvram_getenv(const char *name, char *val,
 576 +static inline int bcm47xx_nvram_getenv(const struct device *dev,
 577 +                                      const char *name, char *val,
 578                                        size_t val_len)
 579  {
 580         return -ENXIO;
 581  }
 582
 583 -static inline int bcm47xx_nvram_gpio_pin(const char *name)
 584 +static inline int bcm47xx_nvram_gpio_pin(const struct device *dev,
 585 +                                        const char *name)
 586  {
 587         return -ENXIO;
 588  }