upstream u-boot with additional patches for our devices/boards: https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ; Gbit ethernet patch for some LIME2 revisions ; with SPI flash support
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u-boot/board/freescale/t208xrdb/ddr.h

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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright 2014 Freescale Semiconductor, Inc.
*/
#ifndef __DDR_H__
#define __DDR_H__
struct board_specific_parameters {
u32 n_ranks;
u32 datarate_mhz_high;
u32 rank_gb;
u32 clk_adjust;
u32 wrlvl_start;
u32 wrlvl_ctl_2;
u32 wrlvl_ctl_3;
};
/*
* These tables contain all valid speeds we want to override with board
* specific parameters. datarate_mhz_high values need to be in ascending order
* for each n_ranks group.
*/
static const struct board_specific_parameters udimm0[] = {
/*
* memory controller 0
* num| hi| rank| clk| wrlvl | wrlvl | wrlvl |
* ranks| mhz| GB |adjst| start | ctl2 | ctl3 |
*/
{2, 1200, 2, 10, 7, 0x0808090a, 0x0b0c0c0a},
{2, 1500, 2, 10, 6, 0x07070809, 0x0a0b0b09},
{2, 1600, 2, 10, 8, 0x0808070b, 0x0c0d0e0a},
{2, 1700, 2, 8, 7, 0x080a0a0c, 0x0c0d0e0a},
{2, 1900, 0, 10, 7, 0x0808080c, 0x0b0c0c09},
{1, 1200, 2, 10, 7, 0x0808090a, 0x0b0c0c0a},
{1, 1500, 2, 10, 6, 0x07070809, 0x0a0b0b09},
{1, 1600, 2, 10, 8, 0x0808070b, 0x0c0d0e0a},
{1, 1700, 2, 8, 7, 0x080a0a0c, 0x0c0d0e0a},
{1, 1900, 0, 10, 7, 0x0808080c, 0x0b0c0c09},
{}
};
static const struct board_specific_parameters *udimms[] = {
udimm0,
};
#endif