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70 lines
1.4 KiB
70 lines
1.4 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* Copyright (C) 2015 Thomas Chou <[email protected]> |
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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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#define SANDBOX_TIMER_RATE 1000000 |
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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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u64 notrace timer_early_get_count(void) |
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{ |
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return os_get_nsec() / 1000 + sandbox_timer_offset * 1000; |
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} |
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unsigned long notrace timer_early_get_rate(void) |
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{ |
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return SANDBOX_TIMER_RATE; |
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} |
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static notrace int sandbox_timer_get_count(struct udevice *dev, u64 *count) |
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{ |
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*count = timer_early_get_count(); |
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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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struct timer_dev_priv *uc_priv = dev_get_uclass_priv(dev); |
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if (!uc_priv->clock_rate) |
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uc_priv->clock_rate = SANDBOX_TIMER_RATE; |
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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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/* This is here in case we don't have a device tree */ |
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U_BOOT_DEVICE(sandbox_timer_non_fdt) = { |
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.name = "sandbox_timer", |
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};
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