drivers/ram/rockchip/sdram_rk3128.c

   1 // SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
   2 /*
   3  * (C) Copyright 2017 Rockchip Electronics Co., Ltd.
   4  */
   5
   6 #include <common.h>
   7 #include <dm.h>
   8 #include <ram.h>
   9 #include <syscon.h>
  10 #include <asm/arch/clock.h>
  11 #include <asm/arch/grf_rk3128.h>
  12 #include <asm/arch/sdram_common.h>
  13
  14 struct dram_info {
  15         struct ram_info info;
  16         struct rk3128_grf *grf;
  17 };
  18
  19 static int rk3128_dmc_probe(struct udevice *dev)
  20 {
  21         struct dram_info *priv = dev_get_priv(dev);
  22
  23         priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
  24         debug("%s: grf=%p\n", __func__, priv->grf);
  25         priv->info.base = CONFIG_SYS_SDRAM_BASE;
  26         priv->info.size = rockchip_sdram_size(
  27                                 (phys_addr_t)&priv->grf->os_reg[1]);
  28
  29         return 0;
  30 }
  31
  32 static int rk3128_dmc_get_info(struct udevice *dev, struct ram_info *info)
  33 {
  34         struct dram_info *priv = dev_get_priv(dev);
  35
  36         *info = priv->info;
  37
  38         return 0;
  39 }
  40
  41 static struct ram_ops rk3128_dmc_ops = {
  42         .get_info = rk3128_dmc_get_info,
  43 };
  44
  45 static const struct udevice_id rk3128_dmc_ids[] = {
  46         { .compatible = "rockchip,rk3128-dmc" },
  47         { }
  48 };
  49
  50 U_BOOT_DRIVER(dmc_rk3128) = {
  51         .name = "rockchip_rk3128_dmc",
  52         .id = UCLASS_RAM,
  53         .of_match = rk3128_dmc_ids,
  54         .ops = &rk3128_dmc_ops,
  55         .probe = rk3128_dmc_probe,
  56         .priv_auto_alloc_size = sizeof(struct dram_info),
  57 };