Merge tag 'u-boot-rockchip-20190809' of https://gitlab.denx.de/u-boot/custodians...
[platform/kernel/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 const struct clk_ops clk_fixed_rate_ops = {
17         .get_rate = clk_fixed_rate_get_rate,
18 };
19
20 static int clk_fixed_rate_ofdata_to_platdata(struct udevice *dev)
21 {
22         struct clk *clk = &to_clk_fixed_rate(dev)->clk;
23 #if !CONFIG_IS_ENABLED(OF_PLATDATA)
24         to_clk_fixed_rate(dev)->fixed_rate =
25                 dev_read_u32_default(dev, "clock-frequency", 0);
26 #endif
27         /* Make fixed rate clock accessible from higher level struct clk */
28         dev->uclass_priv = clk;
29         clk->dev = dev;
30
31         return 0;
32 }
33
34 static const struct udevice_id clk_fixed_rate_match[] = {
35         {
36                 .compatible = "fixed-clock",
37         },
38         { /* sentinel */ }
39 };
40
41 U_BOOT_DRIVER(clk_fixed_rate) = {
42         .name = "fixed_rate_clock",
43         .id = UCLASS_CLK,
44         .of_match = clk_fixed_rate_match,
45         .ofdata_to_platdata = clk_fixed_rate_ofdata_to_platdata,
46         .platdata_auto_alloc_size = sizeof(struct clk_fixed_rate),
47         .ops = &clk_fixed_rate_ops,
48 };