blob: 261839661e9d37ea78d06b2f787b2de7e198f4ae (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2024 Aspeed Technology Inc.
*/
#include <asm/csr.h>
#include <asm/io.h>
#include <dm.h>
#include <errno.h>
#include <timer.h>
#define CSR_MCYCLE 0xb00
#define CSR_MCYCLEH 0xb80
static u64 ast_ibex_timer_get_count(struct udevice *dev)
{
uint32_t cnt_l, cnt_h;
cnt_l = csr_read(CSR_MCYCLE);
cnt_h = csr_read(CSR_MCYCLEH);
return ((uint64_t)cnt_h << 32) | cnt_l;
}
static int ast_ibex_timer_probe(struct udevice *dev)
{
return 0;
}
static const struct timer_ops ast_ibex_timer_ops = {
.get_count = ast_ibex_timer_get_count,
};
static const struct udevice_id ast_ibex_timer_ids[] = {
{ .compatible = "aspeed,ast2700-ibex-timer" },
{ }
};
U_BOOT_DRIVER(ast_ibex_timer) = {
.name = "ast_ibex_timer",
.id = UCLASS_TIMER,
.of_match = ast_ibex_timer_ids,
.probe = ast_ibex_timer_probe,
.ops = &ast_ibex_timer_ops,
};
|
