/* arch/arm/mach-lh7a40x/clocks.c * * Copyright (C) 2004 Marc Singer * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * version 2 as published by the Free Software Foundation. * */ #include <mach/hardware.h> #include <mach/clocks.h> #include <linux/err.h> #include <linux/device.h> #include <linux/string.h> struct module; struct clk { struct list_head node; unsigned long rate; struct module *owner; const char *name; }; /* ----- */ #define MAINDIV1(c) (((c) >> 7) & 0x0f) #define MAINDIV2(c) (((c) >> 11) & 0x1f) #define PS(c) (((c) >> 18) & 0x03) #define PREDIV(c) (((c) >> 2) & 0x1f) #define HCLKDIV(c) (((c) >> 0) & 0x02) #define PCLKDIV(c) (((c) >> 16) & 0x03) unsigned int fclkfreq_get (void) { unsigned int clkset = CSC_CLKSET; unsigned int gclk = XTAL_IN / (1 << PS(clkset)) * (MAINDIV1(clkset) + 2) / (PREDIV(clkset) + 2) * (MAINDIV2(clkset) + 2) ; return gclk; } unsigned int hclkfreq_get (void) { unsigned int clkset = CSC_CLKSET; unsigned int hclk = fclkfreq_get () / (HCLKDIV(clkset) + 1); return hclk; } unsigned int pclkfreq_get (void) { unsigned int clkset = CSC_CLKSET; int pclkdiv = PCLKDIV(clkset); unsigned int pclk; if (pclkdiv == 0x3) pclkdiv = 0x2; pclk = hclkfreq_get () / (1 << pclkdiv); return pclk; } /* ----- */ struct clk *clk_get (struct device *dev, const char *id) { return dev && strcmp(dev_name(dev), "cldc-lh7a40x") == 0 ? NULL : ERR_PTR(-ENOENT); } EXPORT_SYMBOL(clk_get); void clk_put (struct clk *clk) { } EXPORT_SYMBOL(clk_put); int clk_enable (struct clk *clk) { return 0; } EXPORT_SYMBOL(clk_enable); void clk_disable (struct clk *clk) { } EXPORT_SYMBOL(clk_disable); unsigned long clk_get_rate (struct clk *clk) { return 0; } EXPORT_SYMBOL(clk_get_rate); long clk_round_rate (struct clk *clk, unsigned long rate) { return rate; } EXPORT_SYMBOL(clk_round_rate); int clk_set_rate (struct clk *clk, unsigned long rate) { return -EIO; } EXPORT_SYMBOL(clk_set_rate);