Merge branch '2020-06-15-misc-bugfixes'
[oweals/u-boot.git] / drivers / clk / clk_fixed_rate.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (C) 2016 Masahiro Yamada <yamada.masahiro@socionext.com>
4  */
5
6 #include <common.h>
7 #include <clk-uclass.h>
8 #include <dm.h>
9 #include <linux/clk-provider.h>
10
11 static ulong clk_fixed_rate_get_rate(struct clk *clk)
12 {
13         return to_clk_fixed_rate(clk->dev)->fixed_rate;
14 }
15
16 /* avoid clk_enable() return -ENOSYS */
17 static int dummy_enable(struct clk *clk)
18 {
19         return 0;
20 }
21
22 const struct clk_ops clk_fixed_rate_ops = {
23         .get_rate = clk_fixed_rate_get_rate,
24         .enable = dummy_enable,
25 };
26
27 static int clk_fixed_rate_ofdata_to_platdata(struct udevice *dev)
28 {
29         struct clk *clk = &to_clk_fixed_rate(dev)->clk;
30 #if !CONFIG_IS_ENABLED(OF_PLATDATA)
31         to_clk_fixed_rate(dev)->fixed_rate =
32                 dev_read_u32_default(dev, "clock-frequency", 0);
33 #endif
34         /* Make fixed rate clock accessible from higher level struct clk */
35         dev->uclass_priv = clk;
36         clk->dev = dev;
37         clk->enable_count = 0;
38
39         return 0;
40 }
41
42 static const struct udevice_id clk_fixed_rate_match[] = {
43         {
44                 .compatible = "fixed-clock",
45         },
46         { /* sentinel */ }
47 };
48
49 U_BOOT_DRIVER(clk_fixed_rate) = {
50         .name = "fixed_rate_clock",
51         .id = UCLASS_CLK,
52         .of_match = clk_fixed_rate_match,
53         .ofdata_to_platdata = clk_fixed_rate_ofdata_to_platdata,
54         .platdata_auto_alloc_size = sizeof(struct clk_fixed_rate),
55         .ops = &clk_fixed_rate_ops,
56 };