1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Copyright (C) 2015 Thomas Chou <thomas@wytron.com.tw>
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+
5*4882a593Smuzhiyun */
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun #include <common.h>
8*4882a593Smuzhiyun #include <dm.h>
9*4882a593Smuzhiyun #include <errno.h>
10*4882a593Smuzhiyun #include <timer.h>
11*4882a593Smuzhiyun #include <os.h>
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun #define SANDBOX_TIMER_RATE 1000000
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun /* system timer offset in ms */
16*4882a593Smuzhiyun static unsigned long sandbox_timer_offset;
17*4882a593Smuzhiyun
sandbox_timer_add_offset(unsigned long offset)18*4882a593Smuzhiyun void sandbox_timer_add_offset(unsigned long offset)
19*4882a593Smuzhiyun {
20*4882a593Smuzhiyun sandbox_timer_offset += offset;
21*4882a593Smuzhiyun }
22*4882a593Smuzhiyun
timer_early_get_count(void)23*4882a593Smuzhiyun u64 notrace timer_early_get_count(void)
24*4882a593Smuzhiyun {
25*4882a593Smuzhiyun return os_get_nsec() / 1000 + sandbox_timer_offset * 1000;
26*4882a593Smuzhiyun }
27*4882a593Smuzhiyun
timer_early_get_rate(void)28*4882a593Smuzhiyun unsigned long notrace timer_early_get_rate(void)
29*4882a593Smuzhiyun {
30*4882a593Smuzhiyun return SANDBOX_TIMER_RATE;
31*4882a593Smuzhiyun }
32*4882a593Smuzhiyun
sandbox_timer_get_count(struct udevice * dev,u64 * count)33*4882a593Smuzhiyun static notrace int sandbox_timer_get_count(struct udevice *dev, u64 *count)
34*4882a593Smuzhiyun {
35*4882a593Smuzhiyun *count = timer_early_get_count();
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun return 0;
38*4882a593Smuzhiyun }
39*4882a593Smuzhiyun
sandbox_timer_probe(struct udevice * dev)40*4882a593Smuzhiyun static int sandbox_timer_probe(struct udevice *dev)
41*4882a593Smuzhiyun {
42*4882a593Smuzhiyun struct timer_dev_priv *uc_priv = dev_get_uclass_priv(dev);
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun if (!uc_priv->clock_rate)
45*4882a593Smuzhiyun uc_priv->clock_rate = SANDBOX_TIMER_RATE;
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun return 0;
48*4882a593Smuzhiyun }
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun static const struct timer_ops sandbox_timer_ops = {
51*4882a593Smuzhiyun .get_count = sandbox_timer_get_count,
52*4882a593Smuzhiyun };
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun static const struct udevice_id sandbox_timer_ids[] = {
55*4882a593Smuzhiyun { .compatible = "sandbox,timer" },
56*4882a593Smuzhiyun { }
57*4882a593Smuzhiyun };
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun U_BOOT_DRIVER(sandbox_timer) = {
60*4882a593Smuzhiyun .name = "sandbox_timer",
61*4882a593Smuzhiyun .id = UCLASS_TIMER,
62*4882a593Smuzhiyun .of_match = sandbox_timer_ids,
63*4882a593Smuzhiyun .probe = sandbox_timer_probe,
64*4882a593Smuzhiyun .ops = &sandbox_timer_ops,
65*4882a593Smuzhiyun .flags = DM_FLAG_PRE_RELOC,
66*4882a593Smuzhiyun };
67*4882a593Smuzhiyun
68*4882a593Smuzhiyun /* This is here in case we don't have a device tree */
69*4882a593Smuzhiyun U_BOOT_DEVICE(sandbox_timer_non_fdt) = {
70*4882a593Smuzhiyun .name = "sandbox_timer",
71*4882a593Smuzhiyun };
72