1 // SPDX-License-Identifier: GPL-2.0
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_rk3328.h>
12 #include <asm/arch/sdram_common.h>
13
14 struct dram_info {
15 struct ram_info info;
16 struct rk3328_grf_regs *grf;
17 };
18
rk3328_dmc_probe(struct udevice * dev)19 static int rk3328_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[2]);
28
29 return 0;
30 }
31
rk3328_dmc_get_info(struct udevice * dev,struct ram_info * info)32 static int rk3328_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 rk3328_dmc_ops = {
42 .get_info = rk3328_dmc_get_info,
43 };
44
45
46 static const struct udevice_id rk3328_dmc_ids[] = {
47 { .compatible = "rockchip,rk3328-dmc" },
48 { }
49 };
50
51 U_BOOT_DRIVER(dmc_rk3328) = {
52 .name = "rockchip_rk3328_dmc",
53 .id = UCLASS_RAM,
54 .of_match = rk3328_dmc_ids,
55 .ops = &rk3328_dmc_ops,
56 .probe = rk3328_dmc_probe,
57 .priv_auto_alloc_size = sizeof(struct dram_info),
58 };
59