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https://github.com/brain-hackers/u-boot-brain
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f838f12452
We should use device tree to pass the clock frequency of the timer instead of hardcoded in the driver codes. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Acked-by: Simon Glass <sjg@chromium.org>
50 lines
985 B
C
50 lines
985 B
C
/*
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* Copyright (C) 2015 Thomas Chou <thomas@wytron.com.tw>
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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 <dm.h>
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#include <errno.h>
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#include <timer.h>
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#include <os.h>
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/* system timer offset in ms */
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static unsigned long sandbox_timer_offset;
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void sandbox_timer_add_offset(unsigned long offset)
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{
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sandbox_timer_offset += offset;
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}
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static int sandbox_timer_get_count(struct udevice *dev, unsigned long *count)
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{
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*count = os_get_nsec() / 1000 + sandbox_timer_offset * 1000;
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return 0;
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}
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static int sandbox_timer_probe(struct udevice *dev)
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{
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return 0;
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}
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static const struct timer_ops sandbox_timer_ops = {
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.get_count = sandbox_timer_get_count,
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};
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static const struct udevice_id sandbox_timer_ids[] = {
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{ .compatible = "sandbox,timer" },
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{ }
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};
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U_BOOT_DRIVER(sandbox_timer) = {
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.name = "sandbox_timer",
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.id = UCLASS_TIMER,
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.of_match = sandbox_timer_ids,
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.probe = sandbox_timer_probe,
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.ops = &sandbox_timer_ops,
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.flags = DM_FLAG_PRE_RELOC,
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};
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