u-boot-brain/board/freescale/t1040qds/ddr.h

/*
 * Copyright 2013-2014 Freescale Semiconductor, Inc.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#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  |
	 */
#ifdef CONFIG_SYS_FSL_DDR4
	{2,  1666, 0, 8,     7, 0x0808090B, 0x0C0D0E0A,},
	{2,  1900, 0, 8,     6, 0x08080A0C, 0x0D0E0F0A,},
	{1,  1666, 0, 8,     6, 0x0708090B, 0x0C0D0E09,},
	{1,  1900, 0, 8,     6, 0x08080A0C, 0x0D0E0F0A,},
	{1,  2200, 0, 8,     7, 0x08090A0D, 0x0F0F100C,},
#elif defined(CONFIG_SYS_FSL_DDR3)
	{2,  833,  0, 8,     6, 0x06060607, 0x08080807,},
	{2,  1350, 0, 8,     7, 0x0708080A, 0x0A0B0C09,},
	{2,  1666, 0, 8,     7, 0x0808090B, 0x0C0D0E0A,},
	{1,  833,  0, 8,     6, 0x06060607, 0x08080807,},
	{1,  1350, 0, 8,     7, 0x0708080A, 0x0A0B0C09,},
	{1,  1666, 0, 8,     7, 0x0808090B, 0x0C0D0E0A,},
#else
#error DDR type not defined
#endif
	{}
};

static const struct board_specific_parameters *udimms[] = {
	udimm0,
};
#endif