mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-22 19:09:43 +09:00
cc89369fb0
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>
61 lines
1.3 KiB
C
61 lines
1.3 KiB
C
/*
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* (C) Copyright 2016 Rockchip Electronics Co., Ltd.
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*
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* SPDX-License-Identifier: GPL-2.0
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*/
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#include <common.h>
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#include <dm.h>
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#include <ram.h>
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#include <syscon.h>
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#include <asm/arch/clock.h>
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#include <asm/arch/grf_rk3368.h>
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#include <asm/arch/sdram_common.h>
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DECLARE_GLOBAL_DATA_PTR;
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struct dram_info {
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struct ram_info info;
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struct rk3368_pmu_grf *pmugrf;
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};
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static int rk3368_dmc_probe(struct udevice *dev)
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{
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struct dram_info *priv = dev_get_priv(dev);
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priv->pmugrf = syscon_get_first_range(ROCKCHIP_SYSCON_PMUGRF);
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debug("%s: grf=%p\n", __func__, priv->pmugrf);
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priv->info.base = CONFIG_SYS_SDRAM_BASE;
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priv->info.size = rockchip_sdram_size(
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(phys_addr_t)&priv->pmugrf->os_reg[2]);
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return 0;
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}
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static int rk3368_dmc_get_info(struct udevice *dev, struct ram_info *info)
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{
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struct dram_info *priv = dev_get_priv(dev);
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*info = priv->info;
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return 0;
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}
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static struct ram_ops rk3368_dmc_ops = {
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.get_info = rk3368_dmc_get_info,
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};
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static const struct udevice_id rk3368_dmc_ids[] = {
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{ .compatible = "rockchip,rk3368-dmc" },
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{ }
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};
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U_BOOT_DRIVER(dmc_rk3368) = {
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.name = "rockchip_rk3368_dmc",
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.id = UCLASS_RAM,
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.of_match = rk3368_dmc_ids,
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.ops = &rk3368_dmc_ops,
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.probe = rk3368_dmc_probe,
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.priv_auto_alloc_size = sizeof(struct dram_info),
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};
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