drivers/ram/rockchip/sdram_rk3308.c

   1 // SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
   2 /*
   3  * (C) Copyright 2019 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/grf_rk3308.h>
  11 #include <asm/arch-rockchip/clock.h>
  12 #include <asm/arch-rockchip/sdram.h>
  13
  14 struct dram_info {
  15         struct ram_info info;
  16         struct rk3308_grf *grf;
  17 };
  18
  19 static int rk3308_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         priv->info.base = CONFIG_SYS_SDRAM_BASE;
  25         priv->info.size = rockchip_sdram_size((phys_addr_t)&priv->grf->os_reg2);
  26
  27         return 0;
  28 }
  29
  30 static int rk3308_dmc_get_info(struct udevice *dev, struct ram_info *info)
  31 {
  32         struct dram_info *priv = dev_get_priv(dev);
  33
  34         *info = priv->info;
  35
  36         return 0;
  37 }
  38
  39 static struct ram_ops rk3308_dmc_ops = {
  40         .get_info = rk3308_dmc_get_info,
  41 };
  42
  43 static const struct udevice_id rk3308_dmc_ids[] = {
  44         { .compatible = "rockchip,rk3308-dmc" },
  45         { }
  46 };
  47
  48 U_BOOT_DRIVER(dmc_rk3308) = {
  49         .name = "rockchip_rk3308_dmc",
  50         .id = UCLASS_RAM,
  51         .of_match = rk3308_dmc_ids,
  52         .ops = &rk3308_dmc_ops,
  53         .probe = rk3308_dmc_probe,
  54         .priv_auto_alloc_size = sizeof(struct dram_info),
  55 };