mirror of
https://github.com/revyos/th1520-vendor-uboot.git
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76 lines
1.6 KiB
C
76 lines
1.6 KiB
C
/*
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* Copyright (C) 2017-2020 Alibaba Group Holding Limited
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <cpu.h>
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#include <dm.h>
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#include <errno.h>
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#include <dm/device-internal.h>
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#include <dm/lists.h>
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DECLARE_GLOBAL_DATA_PTR;
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static int csky_cpu_get_desc(struct udevice *dev, char *buf, int size)
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{
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const char *isa;
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isa = dev_read_string(dev, "csky,isa");
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if (size < (strlen(isa) + 1))
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return -ENOSPC;
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strcpy(buf, isa);
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return 0;
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}
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static int csky_cpu_get_info(struct udevice *dev, struct cpu_info *info)
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{
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dev_read_u32(dev, "clock-frequency", (u32 *)&info->cpu_freq);
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return 0;
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}
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static int csky_cpu_get_count(struct udevice *dev)
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{
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ofnode node;
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int num = 0;
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ofnode_for_each_subnode(node, dev_ofnode(dev->parent)) {
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const char *device_type;
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/* skip if hart is marked as not available in the device tree */
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if (!ofnode_is_available(node))
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continue;
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device_type = ofnode_read_string(node, "device_type");
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if (!device_type)
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continue;
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if (strcmp(device_type, "cpu") == 0)
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num++;
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}
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return num;
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}
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static const struct cpu_ops csky_cpu_ops = {
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.get_desc = csky_cpu_get_desc,
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.get_info = csky_cpu_get_info,
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.get_count = csky_cpu_get_count,
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};
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static const struct udevice_id csky_cpu_ids[] = {
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{ .compatible = "csky" },
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{ }
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};
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U_BOOT_DRIVER(csky_cpu) = {
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.name = "csky_cpu",
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.id = UCLASS_CPU,
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.of_match = csky_cpu_ids,
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.ops = &csky_cpu_ops,
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.flags = DM_FLAG_PRE_RELOC,
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};
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