1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2015 Google, Inc 4 * Written by Simon Glass <sjg@chromium.org> 5 */ 6 7 #include <common.h> 8 #include <cpu.h> 9 #include <dm.h> 10 #include <errno.h> 11 #include <dm/lists.h> 12 #include <dm/root.h> 13 14 int cpu_probe_all(void) 15 { 16 struct udevice *cpu; 17 int ret; 18 19 ret = uclass_first_device(UCLASS_CPU, &cpu); 20 if (ret) { 21 debug("%s: No CPU found (err = %d)\n", __func__, ret); 22 return ret; 23 } 24 25 while (cpu) { 26 ret = uclass_next_device(&cpu); 27 if (ret) { 28 debug("%s: Error while probing CPU (err = %d)\n", 29 __func__, ret); 30 return ret; 31 } 32 } 33 34 return 0; 35 } 36 37 int cpu_get_desc(struct udevice *dev, char *buf, int size) 38 { 39 struct cpu_ops *ops = cpu_get_ops(dev); 40 41 if (!ops->get_desc) 42 return -ENOSYS; 43 44 return ops->get_desc(dev, buf, size); 45 } 46 47 int cpu_get_info(struct udevice *dev, struct cpu_info *info) 48 { 49 struct cpu_ops *ops = cpu_get_ops(dev); 50 51 if (!ops->get_info) 52 return -ENOSYS; 53 54 return ops->get_info(dev, info); 55 } 56 57 int cpu_get_count(struct udevice *dev) 58 { 59 struct cpu_ops *ops = cpu_get_ops(dev); 60 61 if (!ops->get_count) 62 return -ENOSYS; 63 64 return ops->get_count(dev); 65 } 66 67 int cpu_get_vendor(struct udevice *dev, char *buf, int size) 68 { 69 struct cpu_ops *ops = cpu_get_ops(dev); 70 71 if (!ops->get_vendor) 72 return -ENOSYS; 73 74 return ops->get_vendor(dev, buf, size); 75 } 76 77 U_BOOT_DRIVER(cpu_bus) = { 78 .name = "cpu_bus", 79 .id = UCLASS_SIMPLE_BUS, 80 .per_child_platdata_auto_alloc_size = sizeof(struct cpu_platdata), 81 }; 82 83 static int uclass_cpu_init(struct uclass *uc) 84 { 85 struct udevice *dev; 86 ofnode node; 87 int ret; 88 89 node = ofnode_path("/cpus"); 90 if (!ofnode_valid(node)) 91 return 0; 92 93 ret = device_bind_driver_to_node(dm_root(), "cpu_bus", "cpus", node, 94 &dev); 95 96 return ret; 97 } 98 99 UCLASS_DRIVER(cpu) = { 100 .id = UCLASS_CPU, 101 .name = "cpu", 102 .flags = DM_UC_FLAG_SEQ_ALIAS, 103 .init = uclass_cpu_init, 104 }; 105