LXR uboot/arch/arm/mach-uniphier/fdt-fixup.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Copyright (C) 2016-2018 Socionext Inc.
   4 *   Author: Masahiro Yamada <yamada.masahiro@socionext.com>
   5 */
   6
   7#include <fdt_support.h>
   8#include <fdtdec.h>
   9#include <jffs2/load_kernel.h>
  10#include <mtd_node.h>
  11#include <linux/errno.h>
  12#include <linux/kernel.h>
  13#include <linux/printk.h>
  14
  15#include "soc-info.h"
  16
  17/*
  18 * The DRAM PHY requires 64 byte scratch area in each DRAM channel
  19 * for its dynamic PHY training feature.
  20 */
  21static int uniphier_ld20_fdt_mem_rsv(void *fdt, struct bd_info *bd)
  22{
  23        unsigned long rsv_addr;
  24        const unsigned long rsv_size = 64;
  25        int i, ret;
  26
  27        if (!IS_ENABLED(CONFIG_ARCH_UNIPHIER_LD20) ||
  28            uniphier_get_soc_id() != UNIPHIER_LD20_ID)
  29                return 0;
  30
  31        for (i = 0; i < ARRAY_SIZE(bd->bi_dram); i++) {
  32                if (!bd->bi_dram[i].size)
  33                        continue;
  34
  35                rsv_addr = bd->bi_dram[i].start + bd->bi_dram[i].size;
  36                rsv_addr -= rsv_size;
  37
  38                ret = fdt_add_mem_rsv(fdt, rsv_addr, rsv_size);
  39                if (ret)
  40                        return -ENOSPC;
  41
  42                pr_notice("   Reserved memory region for DRAM PHY training: addr=%lx size=%lx\n",
  43                          rsv_addr, rsv_size);
  44        }
  45
  46        return 0;
  47}
  48
  49int ft_board_setup(void *fdt, struct bd_info *bd)
  50{
  51        static const struct node_info nodes[] = {
  52                { "socionext,uniphier-denali-nand-v5a", MTD_DEV_TYPE_NAND },
  53                { "socionext,uniphier-denali-nand-v5b", MTD_DEV_TYPE_NAND },
  54        };
  55        int ret;
  56
  57        fdt_fixup_mtdparts(fdt, nodes, ARRAY_SIZE(nodes));
  58
  59        ret = uniphier_ld20_fdt_mem_rsv(fdt, bd);
  60        if (ret)
  61                return ret;
  62
  63        return 0;
  64}
  65