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1 office 1 /*
2 * ADM5120 minimal CLK API implementation
3 *
4 * Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org>
5 *
6 * This file was based on the CLK API implementation in:
7 * arch/mips/tx4938/toshiba_rbtx4938/setup.c
8 * Copyright (C) 2000-2001 Toshiba Corporation
9 * 2003-2005 (c) MontaVista Software, Inc.
10 *
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License version 2 as published
13 * by the Free Software Foundation.
14 *
15 */
16  
17 #include <linux/kernel.h>
18 #include <linux/string.h>
19 #include <linux/module.h>
20 #include <linux/err.h>
21 #include <linux/clk.h>
22 #include <linux/device.h>
23  
24 #include <asm/mach-adm5120/adm5120_defs.h>
25  
26 struct clk {
27 unsigned long rate;
28 };
29  
30 static struct clk uart_clk = {
31 .rate = ADM5120_UART_CLOCK
32 };
33  
34 struct clk *clk_get(struct device *dev, const char *id)
35 {
36 const char *name = dev_name(dev);
37  
38 if (!strcmp(name, "apb:uart0") || !strcmp(name, "apb:uart1"))
39 return &uart_clk;
40  
41 return ERR_PTR(-ENOENT);
42 }
43 EXPORT_SYMBOL(clk_get);
44  
45 int clk_enable(struct clk *clk)
46 {
47 return 0;
48 }
49 EXPORT_SYMBOL(clk_enable);
50  
51 void clk_disable(struct clk *clk)
52 {
53 }
54 EXPORT_SYMBOL(clk_disable);
55  
56 unsigned long clk_get_rate(struct clk *clk)
57 {
58 return clk->rate;
59 }
60 EXPORT_SYMBOL(clk_get_rate);
61  
62 void clk_put(struct clk *clk)
63 {
64 }
65 EXPORT_SYMBOL(clk_put);