1 /* 2 * Copyright (C) 2015 Google, Inc 3 * Written by Simon Glass <sjg@chromium.org> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #include <common.h> 9 #include <cpu.h> 10 #include <dm.h> 11 #include <errno.h> 12 #include <dm/lists.h> 13 #include <dm/root.h> 14 15 DECLARE_GLOBAL_DATA_PTR; 16 17 int cpu_get_desc(struct udevice *dev, char *buf, int size) 18 { 19 struct cpu_ops *ops = cpu_get_ops(dev); 20 21 if (!ops->get_desc) 22 return -ENOSYS; 23 24 return ops->get_desc(dev, buf, size); 25 } 26 27 int cpu_get_info(struct udevice *dev, struct cpu_info *info) 28 { 29 struct cpu_ops *ops = cpu_get_ops(dev); 30 31 if (!ops->get_info) 32 return -ENOSYS; 33 34 return ops->get_info(dev, info); 35 } 36 37 int cpu_get_count(struct udevice *dev) 38 { 39 struct cpu_ops *ops = cpu_get_ops(dev); 40 41 if (!ops->get_count) 42 return -ENOSYS; 43 44 return ops->get_count(dev); 45 } 46 47 U_BOOT_DRIVER(cpu_bus) = { 48 .name = "cpu_bus", 49 .id = UCLASS_SIMPLE_BUS, 50 .per_child_platdata_auto_alloc_size = sizeof(struct cpu_platdata), 51 }; 52 53 static int uclass_cpu_init(struct uclass *uc) 54 { 55 struct udevice *dev; 56 int node; 57 int ret; 58 59 node = fdt_path_offset(gd->fdt_blob, "/cpus"); 60 if (node < 0) 61 return 0; 62 63 ret = device_bind_driver_to_node(dm_root(), "cpu_bus", "cpus", node, 64 &dev); 65 66 return ret; 67 } 68 69 UCLASS_DRIVER(cpu) = { 70 .id = UCLASS_CPU, 71 .name = "cpu", 72 .flags = DM_UC_FLAG_SEQ_ALIAS, 73 .init = uclass_cpu_init, 74 }; 75