drivers/core/simple-bus.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (c) 2014 Google, Inc
   4  */
   5
   6 #include <common.h>
   7 #include <dm.h>
   8 #include <dm/simple_bus.h>
   9
  10 fdt_addr_t simple_bus_translate(struct udevice *dev, fdt_addr_t addr)
  11 {
  12         struct simple_bus_plat *plat = dev_get_uclass_plat(dev);
  13
  14         if (addr >= plat->base && addr < plat->base + plat->size)
  15                 addr = (addr - plat->base) + plat->target;
  16
  17         return addr;
  18 }
  19
  20 static int simple_bus_post_bind(struct udevice *dev)
  21 {
  22 #if CONFIG_IS_ENABLED(OF_PLATDATA)
  23         return 0;
  24 #else
  25         u32 cell[3];
  26         int ret;
  27
  28         ret = dev_read_u32_array(dev, "ranges", cell, ARRAY_SIZE(cell));
  29         if (!ret) {
  30                 struct simple_bus_plat *plat = dev_get_uclass_plat(dev);
  31
  32                 plat->base = cell[0];
  33                 plat->target = cell[1];
  34                 plat->size = cell[2];
  35         }
  36
  37         return dm_scan_fdt_dev(dev);
  38 #endif
  39 }
  40
  41 UCLASS_DRIVER(simple_bus) = {
  42         .id             = UCLASS_SIMPLE_BUS,
  43         .name           = "simple_bus",
  44         .post_bind      = simple_bus_post_bind,
  45         .per_device_plat_auto   = sizeof(struct simple_bus_plat),
  46 };
  47
  48 #if !CONFIG_IS_ENABLED(OF_PLATDATA)
  49 static const struct udevice_id generic_simple_bus_ids[] = {
  50         { .compatible = "simple-bus" },
  51         { .compatible = "simple-mfd" },
  52         { }
  53 };
  54 #endif
  55
  56 U_BOOT_DRIVER(simple_bus) = {
  57         .name   = "simple_bus",
  58         .id     = UCLASS_SIMPLE_BUS,
  59         .of_match = of_match_ptr(generic_simple_bus_ids),
  60         .flags  = DM_FLAG_PRE_RELOC,
  61 };