1*4882a593Smuzhiyun /* 2*4882a593Smuzhiyun * Copyright 2008 Extreme Engineering Solutions, Inc. 3*4882a593Smuzhiyun * 4*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+ 5*4882a593Smuzhiyun */ 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun #include <common.h> 8*4882a593Smuzhiyun #include <asm/io.h> 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun /* 11*4882a593Smuzhiyun * Return SYSCLK input frequency - 50 MHz or 66 MHz depending on POR config 12*4882a593Smuzhiyun */ get_board_sys_clk(ulong dummy)13*4882a593Smuzhiyununsigned long get_board_sys_clk(ulong dummy) 14*4882a593Smuzhiyun { 15*4882a593Smuzhiyun #if defined(CONFIG_MPC85xx) 16*4882a593Smuzhiyun volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR); 17*4882a593Smuzhiyun #elif defined(CONFIG_MPC86xx) 18*4882a593Smuzhiyun immap_t *immap = (immap_t *)CONFIG_SYS_IMMR; 19*4882a593Smuzhiyun volatile ccsr_gur_t *gur = &immap->im_gur; 20*4882a593Smuzhiyun #endif 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun if (in_be32(&gur->gpporcr) & 0x10000) 23*4882a593Smuzhiyun return 66666666; 24*4882a593Smuzhiyun else 25*4882a593Smuzhiyun #ifdef CONFIG_ARCH_P2020 26*4882a593Smuzhiyun return 100000000; 27*4882a593Smuzhiyun #else 28*4882a593Smuzhiyun return 50000000; 29*4882a593Smuzhiyun #endif 30*4882a593Smuzhiyun } 31*4882a593Smuzhiyun 32*4882a593Smuzhiyun #ifdef CONFIG_MPC85xx 33*4882a593Smuzhiyun /* 34*4882a593Smuzhiyun * Return DDR input clock - synchronous with SYSCLK or 66 MHz 35*4882a593Smuzhiyun * Note: 86xx doesn't support asynchronous DDR clk 36*4882a593Smuzhiyun */ get_board_ddr_clk(ulong dummy)37*4882a593Smuzhiyununsigned long get_board_ddr_clk(ulong dummy) 38*4882a593Smuzhiyun { 39*4882a593Smuzhiyun volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR); 40*4882a593Smuzhiyun u32 ddr_ratio = (in_be32(&gur->porpllsr) & 0x00003e00) >> 9; 41*4882a593Smuzhiyun 42*4882a593Smuzhiyun if (ddr_ratio == 0x7) 43*4882a593Smuzhiyun return get_board_sys_clk(dummy); 44*4882a593Smuzhiyun 45*4882a593Smuzhiyun #ifdef CONFIG_ARCH_P2020 46*4882a593Smuzhiyun if (in_be32(&gur->gpporcr) & 0x20000) 47*4882a593Smuzhiyun return 66666666; 48*4882a593Smuzhiyun else 49*4882a593Smuzhiyun return 100000000; 50*4882a593Smuzhiyun #else 51*4882a593Smuzhiyun return 66666666; 52*4882a593Smuzhiyun #endif 53*4882a593Smuzhiyun } 54*4882a593Smuzhiyun #endif 55