u-boot/drivers/ram/rockchip/sdram_rk3308.c
Andy Yan 54069939be rockchip: rk3308: Add sdram driver
A dm based dram driver for rk3308 u-boot
to get capacity.

Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
2019-11-17 17:22:53 +08:00

55 lines
1.2 KiB
C

// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
/*
* (C) Copyright 2019 Rockchip Electronics Co., Ltd.
*/
#include <common.h>
#include <dm.h>
#include <ram.h>
#include <syscon.h>
#include <asm/arch/grf_rk3308.h>
#include <asm/arch-rockchip/clock.h>
#include <asm/arch-rockchip/sdram.h>
struct dram_info {
struct ram_info info;
struct rk3308_grf *grf;
};
static int rk3308_dmc_probe(struct udevice *dev)
{
struct dram_info *priv = dev_get_priv(dev);
priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
priv->info.base = CONFIG_SYS_SDRAM_BASE;
priv->info.size = rockchip_sdram_size((phys_addr_t)&priv->grf->os_reg2);
return 0;
}
static int rk3308_dmc_get_info(struct udevice *dev, struct ram_info *info)
{
struct dram_info *priv = dev_get_priv(dev);
*info = priv->info;
return 0;
}
static struct ram_ops rk3308_dmc_ops = {
.get_info = rk3308_dmc_get_info,
};
static const struct udevice_id rk3308_dmc_ids[] = {
{ .compatible = "rockchip,rk3308-dmc" },
{ }
};
U_BOOT_DRIVER(dmc_rk3308) = {
.name = "rockchip_rk3308_dmc",
.id = UCLASS_RAM,
.of_match = rk3308_dmc_ids,
.ops = &rk3308_dmc_ops,
.probe = rk3308_dmc_probe,
.priv_auto_alloc_size = sizeof(struct dram_info),
};