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rockchip: rk3368: add sdram driver for U-Boot

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Add sdram driver in U-Boot for get the correct sdram size from
sys_reg, so that U-Boot can co-work with Rockchip loader or SPL
to get different dram capability and then tell the kernel.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
This commit is contained in:
Kever Yang 2017-06-23 16:11:08 +08:00 committed by Philipp Tomsich
parent 39648e6167
commit cc89369fb0
3 changed files with 64 additions and 1 deletions
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4
arch/arm/include/asm/arch-rockchip/grf_rk3368.h
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@ -92,8 +92,10 @@ struct rk3368_pmu_grf {
u32 gpio0d_drv;
u32 gpio0l_sr;
u32 gpio0h_sr;
u32 reserved[(0x200 - 0x34) / 4 - 1];
u32 os_reg[4];
};
check_member(rk3368_pmu_grf, gpio0h_sr, 0x34);
check_member(rk3368_pmu_grf, os_reg[3], 0x20c);
/*GRF_GPIO0C_IOMUX*/
enum {

1
arch/arm/mach-rockchip/rk3368/Makefile
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@ -5,4 +5,5 @@
#
obj-y += clk_rk3368.o
obj-y += rk3368.o
obj-y += sdram_rk3368.o
obj-y += syscon_rk3368.o

60
arch/arm/mach-rockchip/rk3368/sdram_rk3368.c Normal file
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@ -0,0 +1,60 @@
/*
* (C) Copyright 2016 Rockchip Electronics Co., Ltd.
*
* SPDX-License-Identifier: GPL-2.0
*/
#include <common.h>
#include <dm.h>
#include <ram.h>
#include <syscon.h>
#include <asm/arch/clock.h>
#include <asm/arch/grf_rk3368.h>
#include <asm/arch/sdram_common.h>
DECLARE_GLOBAL_DATA_PTR;
struct dram_info {
struct ram_info info;
struct rk3368_pmu_grf *pmugrf;
};
static int rk3368_dmc_probe(struct udevice *dev)
{
struct dram_info *priv = dev_get_priv(dev);
priv->pmugrf = syscon_get_first_range(ROCKCHIP_SYSCON_PMUGRF);
debug("%s: grf=%p\n", __func__, priv->pmugrf);
priv->info.base = CONFIG_SYS_SDRAM_BASE;
priv->info.size = rockchip_sdram_size(
(phys_addr_t)&priv->pmugrf->os_reg[2]);
return 0;
}
static int rk3368_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 rk3368_dmc_ops = {
.get_info = rk3368_dmc_get_info,
};
static const struct udevice_id rk3368_dmc_ids[] = {
{ .compatible = "rockchip,rk3368-dmc" },
{ }
};
U_BOOT_DRIVER(dmc_rk3368) = {
.name = "rockchip_rk3368_dmc",
.id = UCLASS_RAM,
.of_match = rk3368_dmc_ids,
.ops = &rk3368_dmc_ops,
.probe = rk3368_dmc_probe,
.priv_auto_alloc_size = sizeof(struct dram_info),
};