projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 775d5a11 JB |
1 | /* |
| 2 | * Generic PowerPC 44x platform support | |
| 3 | * | |
| 4 | * Copyright 2008 IBM Corporation | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or modify it | |
| 7 | * under the terms of the GNU General Public License as published by the | |
| 8 | * Free Software Foundation; version 2 of the License. | |
| 9 | * | |
| 10 | * This implements simple platform support for PowerPC 44x chips. This is | |
| 11 | * mostly used for eval boards or other simple and "generic" 44x boards. If | |
| 12 | * your board has custom functions or hardware, then you will likely want to | |
| 13 | * implement your own board.c file to accommodate it. | |
| 14 | */ | |
| 15 | ||
| 16 | #include <asm/machdep.h> | |
| 17 | #include <asm/pci-bridge.h> | |
| 18 | #include <asm/ppc4xx.h> | |
| 19 | #include <asm/prom.h> | |
| 20 | #include <asm/time.h> | |
| 21 | #include <asm/udbg.h> | |
| 22 | #include <asm/uic.h> | |
| 23 | ||
| 24 | #include <linux/init.h> | |
| 25 | #include <linux/of_platform.h> | |
| 26 | ||
| 27 | static __initdata struct of_device_id ppc44x_of_bus[] = { | |
| 28 | { .compatible = "ibm,plb4", }, | |
| 29 | { .compatible = "ibm,opb", }, | |
| 30 | { .compatible = "ibm,ebc", }, | |
| 31 | { .compatible = "simple-bus", }, | |
| 32 | {}, | |
| 33 | }; | |
| 34 | ||
| 35 | static int __init ppc44x_device_probe(void) | |
| 36 | { | |
| 37 | of_platform_bus_probe(NULL, ppc44x_of_bus, NULL); | |
| 38 | ||
| 39 | return 0; | |
| 40 | } | |
| 41 | machine_device_initcall(ppc44x_simple, ppc44x_device_probe); | |
| 42 | ||
| 43 | /* This is the list of boards that can be supported by this simple | |
| 44 | * platform code. This does _not_ mean the boards are compatible, | |
| 45 | * as they most certainly are not from a device tree perspective. | |
| 46 | * However, their differences are handled by the device tree and the | |
| 47 | * drivers and therefore they don't need custom board support files. | |
| 48 | * | |
| 49 | * Again, if your board needs to do things differently then create a | |
| 50 | * board.c file for it rather than adding it to this list. | |
| 51 | */ | |
| 52 | static char *board[] __initdata = { | |
| 53 | "amcc,bamboo", | |
| 54 | "amcc,cayonlands", | |
| 55 | "ibm,ebony", | |
| 56 | "amcc,katmai", | |
| 57 | "amcc,rainier", | |
| 58 | "amcc,sequoia", | |
| 59 | "amcc,taishan" | |
| 60 | }; | |
| 61 | ||
| 62 | static int __init ppc44x_probe(void) | |
| 63 | { | |
| 64 | unsigned long root = of_get_flat_dt_root(); | |
| 65 | int i = 0; | |
| 66 | ||
| 67 | for (i = 0; i < ARRAY_SIZE(board); i++) { | |
| 68 | if (of_flat_dt_is_compatible(root, board[i])) { | |
| 69 | ppc_pci_flags = PPC_PCI_REASSIGN_ALL_RSRC; | |
| 70 | return 1; | |
| 71 | } | |
| 72 | } | |
| 73 | ||
| 74 | return 0; | |
| 75 | } | |
| 76 | ||
| 77 | define_machine(ppc44x_simple) { | |
| 78 | .name = "PowerPC 44x Platform", | |
| 79 | .probe = ppc44x_probe, | |
| 80 | .progress = udbg_progress, | |
| 81 | .init_IRQ = uic_init_tree, | |
| 82 | .get_irq = uic_get_irq, | |
| 83 | .restart = ppc4xx_reset_system, | |
| 84 | .calibrate_decr = generic_calibrate_decr, | |
| 85 | }; |