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48 lines
1,018 B
C
48 lines
1,018 B
C
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2020, Sean Anderson <seanga2@gmail.com>
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* Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
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*/
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#include <common.h>
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#include <clk.h>
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#include <dm.h>
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#include <timer.h>
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#include <asm/io.h>
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#include <linux/err.h>
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/* mtime register */
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#define MTIME_REG(base) ((ulong)(base) + 0xbff8)
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static u64 sifive_clint_get_count(struct udevice *dev)
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{
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return readq((void __iomem *)MTIME_REG(dev->priv));
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}
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static const struct timer_ops sifive_clint_ops = {
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.get_count = sifive_clint_get_count,
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};
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static int sifive_clint_probe(struct udevice *dev)
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{
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dev->priv = dev_read_addr_ptr(dev);
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if (!dev->priv)
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return -EINVAL;
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return timer_timebase_fallback(dev);
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}
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static const struct udevice_id sifive_clint_ids[] = {
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{ .compatible = "riscv,clint0" },
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{ }
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};
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U_BOOT_DRIVER(sifive_clint) = {
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.name = "sifive_clint",
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.id = UCLASS_TIMER,
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.of_match = sifive_clint_ids,
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.probe = sifive_clint_probe,
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.ops = &sifive_clint_ops,
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.flags = DM_FLAG_PRE_RELOC,
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};
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