drivers/ram/rockchip/sdram_rk3568.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2021 Rockchip Electronics Co., Ltd.
   4  */
   5
   6 #include <config.h>
   7 #include <dm.h>
   8 #include <ram.h>
   9 #include <syscon.h>
  10 #include <asm/arch-rockchip/clock.h>
  11 #include <asm/arch-rockchip/grf_rk3568.h>
  12 #include <asm/arch-rockchip/sdram.h>
  13
  14 struct dram_info {
  15         struct ram_info info;
  16         struct rk3568_pmugrf *pmugrf;
  17 };
  18
  19 static int rk3568_dmc_probe(struct udevice *dev)
  20 {
  21         struct dram_info *priv = dev_get_priv(dev);
  22
  23         priv->pmugrf = syscon_get_first_range(ROCKCHIP_SYSCON_PMUGRF);
  24         priv->info.base = CFG_SYS_SDRAM_BASE;
  25         priv->info.size =
  26                 rockchip_sdram_size((phys_addr_t)&priv->pmugrf->pmu_os_reg2);
  27
  28         return 0;
  29 }
  30
  31 static int rk3568_dmc_get_info(struct udevice *dev, struct ram_info *info)
  32 {
  33         struct dram_info *priv = dev_get_priv(dev);
  34
  35         *info = priv->info;
  36
  37         return 0;
  38 }
  39
  40 static struct ram_ops rk3568_dmc_ops = {
  41         .get_info = rk3568_dmc_get_info,
  42 };
  43
  44 static const struct udevice_id rk3568_dmc_ids[] = {
  45         { .compatible = "rockchip,rk3568-dmc" },
  46         { }
  47 };
  48
  49 U_BOOT_DRIVER(dmc_rk3568) = {
  50         .name = "rockchip_rk3568_dmc",
  51         .id = UCLASS_RAM,
  52         .of_match = rk3568_dmc_ids,
  53         .ops = &rk3568_dmc_ops,
  54         .probe = rk3568_dmc_probe,
  55         .priv_auto = sizeof(struct dram_info),
  56 };