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- /*
- * Copyright (C) 2017-2020 Alibaba Group Holding Limited
- *
- * SPDX-License-Identifier: GPL-2.0+
- */
- #include <common.h>
- #include <cpu.h>
- #include <dm.h>
- #include <errno.h>
- #include <dm/device-internal.h>
- #include <dm/lists.h>
- DECLARE_GLOBAL_DATA_PTR;
- static int csky_cpu_get_desc(struct udevice *dev, char *buf, int size)
- {
- const char *isa;
- isa = dev_read_string(dev, "csky,isa");
- if (size < (strlen(isa) + 1))
- return -ENOSPC;
- strcpy(buf, isa);
- return 0;
- }
- static int csky_cpu_get_info(struct udevice *dev, struct cpu_info *info)
- {
- dev_read_u32(dev, "clock-frequency", (u32 *)&info->cpu_freq);
- return 0;
- }
- static int csky_cpu_get_count(struct udevice *dev)
- {
- ofnode node;
- int num = 0;
- ofnode_for_each_subnode(node, dev_ofnode(dev->parent)) {
- const char *device_type;
- /* skip if hart is marked as not available in the device tree */
- if (!ofnode_is_available(node))
- continue;
- device_type = ofnode_read_string(node, "device_type");
- if (!device_type)
- continue;
- if (strcmp(device_type, "cpu") == 0)
- num++;
- }
- return num;
- }
- static const struct cpu_ops csky_cpu_ops = {
- .get_desc = csky_cpu_get_desc,
- .get_info = csky_cpu_get_info,
- .get_count = csky_cpu_get_count,
- };
- static const struct udevice_id csky_cpu_ids[] = {
- { .compatible = "csky" },
- { }
- };
- U_BOOT_DRIVER(csky_cpu) = {
- .name = "csky_cpu",
- .id = UCLASS_CPU,
- .of_match = csky_cpu_ids,
- .ops = &csky_cpu_ops,
- .flags = DM_FLAG_PRE_RELOC,
- };
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