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clk: Add get/enable/disable/release for a bulk of clocks
[u-boot] / drivers / clk / clk_fixed_rate.c
1 /*
2  * Copyright (C) 2016 Masahiro Yamada <yamada.masahiro@socionext.com>
3  *
4  * SPDX-License-Identifier:     GPL-2.0+
5  */
6
7 #include <common.h>
8 #include <clk-uclass.h>
9 #include <dm.h>
10
11 struct clk_fixed_rate {
12         unsigned long fixed_rate;
13 };
14
15 #define to_clk_fixed_rate(dev)  ((struct clk_fixed_rate *)dev_get_platdata(dev))
16
17 static ulong clk_fixed_rate_get_rate(struct clk *clk)
18 {
19         if (clk->id != 0)
20                 return -EINVAL;
21
22         return to_clk_fixed_rate(clk->dev)->fixed_rate;
23 }
24
25 const struct clk_ops clk_fixed_rate_ops = {
26         .get_rate = clk_fixed_rate_get_rate,
27 };
28
29 static int clk_fixed_rate_ofdata_to_platdata(struct udevice *dev)
30 {
31 #if !CONFIG_IS_ENABLED(OF_PLATDATA)
32         to_clk_fixed_rate(dev)->fixed_rate =
33                 dev_read_u32_default(dev, "clock-frequency", 0);
34 #endif
35
36         return 0;
37 }
38
39 static const struct udevice_id clk_fixed_rate_match[] = {
40         {
41                 .compatible = "fixed-clock",
42         },
43         { /* sentinel */ }
44 };
45
46 U_BOOT_DRIVER(clk_fixed_rate) = {
47         .name = "fixed_rate_clock",
48         .id = UCLASS_CLK,
49         .of_match = clk_fixed_rate_match,
50         .ofdata_to_platdata = clk_fixed_rate_ofdata_to_platdata,
51         .platdata_auto_alloc_size = sizeof(struct clk_fixed_rate),
52         .ops = &clk_fixed_rate_ops,
53 };