1/* 2 * OMAP2xxx sys_clk-specific clock code 3 * 4 * Copyright (C) 2005-2008 Texas Instruments, Inc. 5 * Copyright (C) 2004-2010 Nokia Corporation 6 * 7 * Contacts: 8 * Richard Woodruff <r-woodruff2@ti.com> 9 * Paul Walmsley 10 * 11 * Based on earlier work by Tuukka Tikkanen, Tony Lindgren, 12 * Gordon McNutt and RidgeRun, Inc. 13 * 14 * This program is free software; you can redistribute it and/or modify 15 * it under the terms of the GNU General Public License version 2 as 16 * published by the Free Software Foundation. 17 */ 18#undef DEBUG 19 20#include <linux/kernel.h> 21#include <linux/errno.h> 22#include <linux/clk.h> 23#include <linux/io.h> 24 25#include <plat/clock.h> 26 27#include "clock.h" 28#include "clock2xxx.h" 29#include "prm2xxx_3xxx.h" 30#include "prm-regbits-24xx.h" 31 32void __iomem *prcm_clksrc_ctrl; 33 34u32 omap2xxx_get_sysclkdiv(void) 35{ 36 u32 div; 37 38 div = __raw_readl(prcm_clksrc_ctrl); 39 div &= OMAP_SYSCLKDIV_MASK; 40 div >>= OMAP_SYSCLKDIV_SHIFT; 41 42 return div; 43} 44 45unsigned long omap2xxx_sys_clk_recalc(struct clk *clk) 46{ 47 return clk->parent->rate / omap2xxx_get_sysclkdiv(); 48} 49 50 51