drivers/ram/rockchip/sdram_rk3328.c

   1 /*
   2  * (C) Copyright 2017 Rockchip Electronics Co., Ltd.
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0
   5  */
   6
   7 #include <common.h>
   8 #include <dm.h>
   9 #include <ram.h>
  10 #include <syscon.h>
  11 #include <asm/arch/clock.h>
  12 #include <asm/arch/grf_rk3328.h>
  13 #include <asm/arch/sdram_common.h>
  14
  15 DECLARE_GLOBAL_DATA_PTR;
  16 struct dram_info {
  17         struct ram_info info;
  18         struct rk3328_grf_regs *grf;
  19 };
  20
  21 static int rk3328_dmc_probe(struct udevice *dev)
  22 {
  23         struct dram_info *priv = dev_get_priv(dev);
  24
  25         priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
  26         debug("%s: grf=%p\n", __func__, priv->grf);
  27         priv->info.base = CONFIG_SYS_SDRAM_BASE;
  28         priv->info.size = rockchip_sdram_size(
  29                                 (phys_addr_t)&priv->grf->os_reg[2]);
  30
  31         return 0;
  32 }
  33
  34 static int rk3328_dmc_get_info(struct udevice *dev, struct ram_info *info)
  35 {
  36         struct dram_info *priv = dev_get_priv(dev);
  37
  38         *info = priv->info;
  39
  40         return 0;
  41 }
  42
  43 static struct ram_ops rk3328_dmc_ops = {
  44         .get_info = rk3328_dmc_get_info,
  45 };
  46
  47
  48 static const struct udevice_id rk3328_dmc_ids[] = {
  49         { .compatible = "rockchip,rk3328-dmc" },
  50         { }
  51 };
  52
  53 U_BOOT_DRIVER(dmc_rk3328) = {
  54         .name = "rockchip_rk3328_dmc",
  55         .id = UCLASS_RAM,
  56         .of_match = rk3328_dmc_ids,
  57         .ops = &rk3328_dmc_ops,
  58         .probe = rk3328_dmc_probe,
  59         .priv_auto_alloc_size = sizeof(struct dram_info),
  60 };