| /* |
| * Copyright 2008 Extreme Engineering Solutions, Inc. |
| * |
| * See file CREDITS for list of people who contributed to this |
| * project. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation; either version 2 of |
| * the License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| * MA 02111-1307 USA |
| */ |
| |
| #include <common.h> |
| |
| /* |
| * Return SYSCLK input frequency - 50 MHz or 66 MHz depending on POR config |
| */ |
| unsigned long get_board_sys_clk(ulong dummy) |
| { |
| #if defined(CONFIG_MPC85xx) |
| volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR); |
| #elif defined(CONFIG_MPC86xx) |
| immap_t *immap = (immap_t *)CONFIG_SYS_IMMR; |
| volatile ccsr_gur_t *gur = &immap->im_gur; |
| #endif |
| u32 gpporcr = gur->gpporcr; |
| |
| if (gpporcr & 0x10000) |
| return 66666666; |
| else |
| return 50000000; |
| } |
| |
| #ifdef CONFIG_MPC85xx |
| /* |
| * Return DDR input clock - synchronous with SYSCLK or 66 MHz |
| * Note: 86xx doesn't support asynchronous DDR clk |
| */ |
| unsigned long get_board_ddr_clk(ulong dummy) |
| { |
| volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR); |
| u32 ddr_ratio = ((gur->porpllsr) & 0x00003e00) >> 9; |
| |
| if (ddr_ratio == 0x7) |
| return get_board_sys_clk(dummy); |
| |
| return 66666666; |
| } |
| #endif |
