diff options
Diffstat (limited to 'drivers/clk/clk-bcm2835.c')
-rw-r--r-- | drivers/clk/clk-bcm2835.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/drivers/clk/clk-bcm2835.c b/drivers/clk/clk-bcm2835.c new file mode 100644 index 000000000000..67ad16b20b81 --- /dev/null +++ b/drivers/clk/clk-bcm2835.c | |||
@@ -0,0 +1,59 @@ | |||
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> | ||
23 | |||
24 | /* | ||
25 | * These are fixed clocks. They're probably not all root clocks and it may | ||
26 | * be possible to turn them on and off but until this is mapped out better | ||
27 | * it's the only way they can be used. | ||
28 | */ | ||
29 | void __init bcm2835_init_clocks(void) | ||
30 | { | ||
31 | struct clk *clk; | ||
32 | int ret; | ||
33 | |||
34 | clk = clk_register_fixed_rate(NULL, "sys_pclk", NULL, CLK_IS_ROOT, | ||
35 | 250000000); | ||
36 | if (!clk) | ||
37 | pr_err("sys_pclk not registered\n"); | ||
38 | |||
39 | clk = clk_register_fixed_rate(NULL, "apb_pclk", NULL, CLK_IS_ROOT, | ||
40 | 126000000); | ||
41 | if (!clk) | ||
42 | pr_err("apb_pclk not registered\n"); | ||
43 | |||
44 | clk = clk_register_fixed_rate(NULL, "uart0_pclk", NULL, CLK_IS_ROOT, | ||
45 | 3000000); | ||
46 | if (!clk) | ||
47 | pr_err("uart0_pclk not registered\n"); | ||
48 | ret = clk_register_clkdev(clk, NULL, "20201000.uart"); | ||
49 | if (ret) | ||
50 | pr_err("uart0_pclk alias not registered\n"); | ||
51 | |||
52 | clk = clk_register_fixed_rate(NULL, "uart1_pclk", NULL, CLK_IS_ROOT, | ||
53 | 125000000); | ||
54 | if (!clk) | ||
55 | pr_err("uart1_pclk not registered\n"); | ||
56 | ret = clk_register_clkdev(clk, NULL, "20215000.uart"); | ||
57 | if (ret) | ||
58 | pr_err("uart0_pclk alias not registered\n"); | ||
59 | } | ||