1 /* arch/arm/mach-lh7a40x/clocks.c
3 * Copyright (C) 2004 Marc Singer
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * version 2 as published by the Free Software Foundation.
10 #include <mach/hardware.h>
11 #include <mach/clocks.h>
12 #include <linux/err.h>
17 struct list_head node;
25 #define MAINDIV1(c) (((c) >> 7) & 0x0f)
26 #define MAINDIV2(c) (((c) >> 11) & 0x1f)
27 #define PS(c) (((c) >> 18) & 0x03)
28 #define PREDIV(c) (((c) >> 2) & 0x1f)
29 #define HCLKDIV(c) (((c) >> 0) & 0x02)
30 #define PCLKDIV(c) (((c) >> 16) & 0x03)
32 unsigned int fclkfreq_get (void)
34 unsigned int clkset = CSC_CLKSET;
38 * (MAINDIV1(clkset) + 2)
39 / (PREDIV(clkset) + 2)
40 * (MAINDIV2(clkset) + 2)
45 unsigned int hclkfreq_get (void)
47 unsigned int clkset = CSC_CLKSET;
48 unsigned int hclk = fclkfreq_get () / (HCLKDIV(clkset) + 1);
53 unsigned int pclkfreq_get (void)
55 unsigned int clkset = CSC_CLKSET;
56 int pclkdiv = PCLKDIV(clkset);
60 pclk = hclkfreq_get () / (1 << pclkdiv);
67 struct clk *clk_get (struct device *dev, const char *id)
69 return dev && strcmp(dev_name(dev), "cldc-lh7a40x") == 0
70 ? NULL : ERR_PTR(-ENOENT);
72 EXPORT_SYMBOL(clk_get);
74 void clk_put (struct clk *clk)
77 EXPORT_SYMBOL(clk_put);
79 int clk_enable (struct clk *clk)
83 EXPORT_SYMBOL(clk_enable);
85 void clk_disable (struct clk *clk)
88 EXPORT_SYMBOL(clk_disable);
90 unsigned long clk_get_rate (struct clk *clk)
94 EXPORT_SYMBOL(clk_get_rate);
96 long clk_round_rate (struct clk *clk, unsigned long rate)
100 EXPORT_SYMBOL(clk_round_rate);
102 int clk_set_rate (struct clk *clk, unsigned long rate)
106 EXPORT_SYMBOL(clk_set_rate);