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75fabc3f SA |
1 | /* |
2 | * Copyright (C) 2010 Broadcom | |
3 | * Copyright (C) 2012 Stephen Warren | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | */ | |
19 | ||
20 | #include <linux/clk-provider.h> | |
21 | #include <linux/clkdev.h> | |
22 | #include <linux/clk/bcm2835.h> | |
526d239c SW |
23 | #include <linux/clk-provider.h> |
24 | #include <linux/of.h> | |
25 | ||
26 | static const __initconst struct of_device_id clk_match[] = { | |
27 | { .compatible = "fixed-clock", .data = of_fixed_clk_setup, }, | |
28 | { } | |
29 | }; | |
75fabc3f SA |
30 | |
31 | /* | |
32 | * These are fixed clocks. They're probably not all root clocks and it may | |
33 | * be possible to turn them on and off but until this is mapped out better | |
34 | * it's the only way they can be used. | |
35 | */ | |
36 | void __init bcm2835_init_clocks(void) | |
37 | { | |
38 | struct clk *clk; | |
39 | int ret; | |
40 | ||
41 | clk = clk_register_fixed_rate(NULL, "sys_pclk", NULL, CLK_IS_ROOT, | |
42 | 250000000); | |
0de9f23a | 43 | if (IS_ERR(clk)) |
75fabc3f SA |
44 | pr_err("sys_pclk not registered\n"); |
45 | ||
46 | clk = clk_register_fixed_rate(NULL, "apb_pclk", NULL, CLK_IS_ROOT, | |
47 | 126000000); | |
0de9f23a | 48 | if (IS_ERR(clk)) |
75fabc3f SA |
49 | pr_err("apb_pclk not registered\n"); |
50 | ||
51 | clk = clk_register_fixed_rate(NULL, "uart0_pclk", NULL, CLK_IS_ROOT, | |
52 | 3000000); | |
0de9f23a | 53 | if (IS_ERR(clk)) |
75fabc3f SA |
54 | pr_err("uart0_pclk not registered\n"); |
55 | ret = clk_register_clkdev(clk, NULL, "20201000.uart"); | |
56 | if (ret) | |
57 | pr_err("uart0_pclk alias not registered\n"); | |
58 | ||
59 | clk = clk_register_fixed_rate(NULL, "uart1_pclk", NULL, CLK_IS_ROOT, | |
60 | 125000000); | |
0de9f23a | 61 | if (IS_ERR(clk)) |
75fabc3f SA |
62 | pr_err("uart1_pclk not registered\n"); |
63 | ret = clk_register_clkdev(clk, NULL, "20215000.uart"); | |
64 | if (ret) | |
686ea585 | 65 | pr_err("uart1_pclk alias not registered\n"); |
526d239c SW |
66 | |
67 | of_clk_init(clk_match); | |
75fabc3f | 68 | } |