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
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2016 Masahiro Yamada <yamada.masahiro@socionext.com>
*/
#include <common.h>
#include <clk-uclass.h>
#include <dm.h>
#include <dm/device-internal.h>
#include <linux/clk-provider.h>
static ulong clk_fixed_rate_get_rate(struct clk *clk)
{
return to_clk_fixed_rate(clk->dev)->fixed_rate;
}
/* avoid clk_enable() return -ENOSYS */
static int dummy_enable(struct clk *clk)
{
return 0;
}
const struct clk_ops clk_fixed_rate_ops = {
.get_rate = clk_fixed_rate_get_rate,
.enable = dummy_enable,
};
static int clk_fixed_rate_of_to_plat(struct udevice *dev)
{
struct clk *clk = &to_clk_fixed_rate(dev)->clk;
#if !CONFIG_IS_ENABLED(OF_PLATDATA)
to_clk_fixed_rate(dev)->fixed_rate =
dev_read_u32_default(dev, "clock-frequency", 0);
#endif
/* Make fixed rate clock accessible from higher level struct clk */
/* FIXME: This is not allowed */
dev_set_uclass_priv(dev, clk);
clk->dev = dev;
clk->enable_count = 0;
return 0;
}
static const struct udevice_id clk_fixed_rate_match[] = {
{
.compatible = "fixed-clock",
},
{ /* sentinel */ }
};
U_BOOT_DRIVER(fixed_clock) = {
.name = "fixed_clock",
.id = UCLASS_CLK,
.of_match = clk_fixed_rate_match,
.of_to_plat = clk_fixed_rate_of_to_plat,
.plat_auto = sizeof(struct clk_fixed_rate),
.ops = &clk_fixed_rate_ops,
.flags = DM_FLAG_PRE_RELOC,
};
|
