1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Old U-boot compatibility for MPC5200 4 * 5 * Author: Grant Likely <grant.likely@secretlab.ca> 6 * 7 * Copyright (c) 2007 Secret Lab Technologies Ltd. 8 * Copyright (c) 2007 Freescale Semiconductor, Inc. 9 */ 10 11 #include "ops.h" 12 #include "stdio.h" 13 #include "io.h" 14 #include "cuboot.h" 15 16 #define TARGET_PPC_MPC52xx 17 #include "ppcboot.h" 18 19 static bd_t bd; 20 21 static void platform_fixups(void) 22 { 23 void *soc, *reg; 24 int div; 25 u32 sysfreq; 26 27 28 dt_fixup_memory(bd.bi_memstart, bd.bi_memsize); 29 dt_fixup_mac_addresses(bd.bi_enetaddr); 30 dt_fixup_cpu_clocks(bd.bi_intfreq, bd.bi_busfreq / 4, bd.bi_busfreq); 31 32 /* Unfortunately, the specific model number is encoded in the 33 * soc node name in existing dts files -- once that is fixed, 34 * this can do a simple path lookup. 35 */ 36 soc = find_node_by_devtype(NULL, "soc"); 37 if (!soc) 38 soc = find_node_by_compatible(NULL, "fsl,mpc5200-immr"); 39 if (!soc) 40 soc = find_node_by_compatible(NULL, "fsl,mpc5200b-immr"); 41 if (soc) { 42 setprop(soc, "bus-frequency", &bd.bi_ipbfreq, 43 sizeof(bd.bi_ipbfreq)); 44 45 if (!dt_xlate_reg(soc, 0, (void*)®, NULL)) 46 return; 47 div = in_8(reg + 0x204) & 0x0020 ? 8 : 4; 48 sysfreq = bd.bi_busfreq * div; 49 setprop(soc, "system-frequency", &sysfreq, sizeof(sysfreq)); 50 } 51 } 52 53 void platform_init(unsigned long r3, unsigned long r4, unsigned long r5, 54 unsigned long r6, unsigned long r7) 55 { 56 CUBOOT_INIT(); 57 fdt_init(_dtb_start); 58 serial_console_init(); 59 platform_ops.fixups = platform_fixups; 60 } 61