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 <log.h>
   9 #include <ram.h>
  10 #include <syscon.h>
  11 #include <asm/arch-rockchip/clock.h>
  12 #include <asm/arch-rockchip/grf_rk3128.h>
  13 #include <asm/arch-rockchip/sdram.h>
  14
  15 struct dram_info {
  16         struct ram_info info;
  17         struct rk3128_grf *grf;
  18 };
  19
  20 static int rk3128_dmc_probe(struct udevice *dev)
  21 {
  22         struct dram_info *priv = dev_get_priv(dev);
  23
  24         priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
  25         debug("%s: grf=%p\n", __func__, priv->grf);
  26         priv->info.base = CONFIG_SYS_SDRAM_BASE;
  27         priv->info.size = rockchip_sdram_size(
  28                                 (phys_addr_t)&priv->grf->os_reg[1]);
  29
  30         return 0;
  31 }
  32
  33 static int rk3128_dmc_get_info(struct udevice *dev, struct ram_info *info)
  34 {
  35         struct dram_info *priv = dev_get_priv(dev);
  36
  37         *info = priv->info;
  38
  39         return 0;
  40 }
  41
  42 static struct ram_ops rk3128_dmc_ops = {
  43         .get_info = rk3128_dmc_get_info,
  44 };
  45
  46 static const struct udevice_id rk3128_dmc_ids[] = {
  47         { .compatible = "rockchip,rk3128-dmc" },
  48         { }
  49 };
  50
  51 U_BOOT_DRIVER(dmc_rk3128) = {
  52         .name = "rockchip_rk3128_dmc",
  53         .id = UCLASS_RAM,
  54         .of_match = rk3128_dmc_ids,
  55         .ops = &rk3128_dmc_ops,
  56         .probe = rk3128_dmc_probe,
  57         .priv_auto_alloc_size = sizeof(struct dram_info),
  58 };