| Jimmy Zhang | a308d46 | 2012-04-10 05:17:06 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2011 The Chromium OS Authors. |
| 3 | * |
| 4 | * See file CREDITS for list of people who contributed to this |
| 5 | * project. |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License as |
| 9 | * published by the Free Software Foundation; either version 2 of |
| 10 | * the License, or (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 20 | * MA 02111-1307 USA |
| 21 | */ |
| 22 | |
| 23 | #include <common.h> |
| 24 | #include <asm/io.h> |
| 25 | #include <asm/arch/ap20.h> |
| 26 | #include <asm/arch/clk_rst.h> |
| 27 | #include <asm/arch/clock.h> |
| 28 | #include <asm/arch/emc.h> |
| 29 | #include <asm/arch/pmu.h> |
| 30 | #include <asm/arch/sys_proto.h> |
| 31 | #include <asm/arch/tegra2.h> |
| 32 | |
| 33 | DECLARE_GLOBAL_DATA_PTR; |
| 34 | |
| 35 | /* These rates are hard-coded for now, until fdt provides them */ |
| 36 | #define EMC_SDRAM_RATE_T20 (333000 * 2 * 1000) |
| 37 | #define EMC_SDRAM_RATE_T25 (380000 * 2 * 1000) |
| 38 | |
| 39 | int board_emc_init(void) |
| 40 | { |
| 41 | unsigned rate; |
| 42 | |
| 43 | switch (tegra_get_chip_type()) { |
| 44 | default: |
| 45 | case TEGRA_SOC_T20: |
| 46 | rate = EMC_SDRAM_RATE_T20; |
| 47 | break; |
| 48 | case TEGRA_SOC_T25: |
| 49 | rate = EMC_SDRAM_RATE_T25; |
| 50 | break; |
| 51 | } |
| 52 | return tegra_set_emc(gd->fdt_blob, rate); |
| 53 | } |