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Tom Rini83d290c2018-05-06 17:58:06 -04001// SPDX-License-Identifier: GPL-2.0+
Thomas Chou9961a0b2015-10-30 15:35:52 +08002/*
3 * Copyright (C) 2015 Thomas Chou <thomas@wytron.com.tw>
Thomas Chou9961a0b2015-10-30 15:35:52 +08004 */
5
6#include <common.h>
7#include <dm.h>
8#include <errno.h>
9#include <timer.h>
10#include <os.h>
11
Simon Glass01476ea2016-02-24 09:14:51 -070012#define SANDBOX_TIMER_RATE 1000000
13
Thomas Chou9961a0b2015-10-30 15:35:52 +080014/* system timer offset in ms */
15static unsigned long sandbox_timer_offset;
16
17void sandbox_timer_add_offset(unsigned long offset)
18{
19 sandbox_timer_offset += offset;
20}
21
Simon Glass01476ea2016-02-24 09:14:51 -070022u64 notrace timer_early_get_count(void)
Thomas Chou9961a0b2015-10-30 15:35:52 +080023{
Simon Glass01476ea2016-02-24 09:14:51 -070024 return os_get_nsec() / 1000 + sandbox_timer_offset * 1000;
25}
26
27unsigned long notrace timer_early_get_rate(void)
28{
29 return SANDBOX_TIMER_RATE;
30}
31
32static notrace int sandbox_timer_get_count(struct udevice *dev, u64 *count)
33{
34 *count = timer_early_get_count();
Thomas Chou9961a0b2015-10-30 15:35:52 +080035
36 return 0;
37}
38
39static int sandbox_timer_probe(struct udevice *dev)
40{
Stephen Warrenbb883f82016-01-06 10:33:04 -070041 struct timer_dev_priv *uc_priv = dev_get_uclass_priv(dev);
42
43 if (!uc_priv->clock_rate)
Simon Glass01476ea2016-02-24 09:14:51 -070044 uc_priv->clock_rate = SANDBOX_TIMER_RATE;
Stephen Warrenbb883f82016-01-06 10:33:04 -070045
Thomas Chou9961a0b2015-10-30 15:35:52 +080046 return 0;
47}
48
49static const struct timer_ops sandbox_timer_ops = {
50 .get_count = sandbox_timer_get_count,
51};
52
53static const struct udevice_id sandbox_timer_ids[] = {
54 { .compatible = "sandbox,timer" },
55 { }
56};
57
58U_BOOT_DRIVER(sandbox_timer) = {
59 .name = "sandbox_timer",
60 .id = UCLASS_TIMER,
61 .of_match = sandbox_timer_ids,
62 .probe = sandbox_timer_probe,
63 .ops = &sandbox_timer_ops,
64 .flags = DM_FLAG_PRE_RELOC,
65};
Stephen Warrenbb883f82016-01-06 10:33:04 -070066
67/* This is here in case we don't have a device tree */
68U_BOOT_DEVICE(sandbox_timer_non_fdt) = {
69 .name = "sandbox_timer",
70};