51 lines
1 KiB
C
51 lines
1 KiB
C
|
/*
|
||
|
|
* OMAP2xxx sys_clk-specific clock code
|
||
|
|
*
|
||
|
|
* Copyright (C) 2005-2008 Texas Instruments, Inc.
|
||
|
|
* Copyright (C) 2004-2010 Nokia Corporation
|
||
|
|
*
|
||
|
|
* Contacts:
|
||
|
|
* Richard Woodruff <r-woodruff2@ti.com>
|
||
|
|
* Paul Walmsley
|
||
|
|
*
|
||
|
|
* Based on earlier work by Tuukka Tikkanen, Tony Lindgren,
|
||
|
|
* Gordon McNutt and RidgeRun, Inc.
|
||
|
|
*
|
||
|
|
* 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.
|
||
|
|
*/
|
||
|
|
#undef DEBUG
|
||
|
|
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/errno.h>
|
||
|
|
#include <linux/clk.h>
|
||
|
|
#include <linux/io.h>
|
||
|
|
|
||
|
|
#include <plat/clock.h>
|
||
|
|
|
||
|
|
#include "clock.h"
|
||
|
|
#include "clock2xxx.h"
|
||
|
|
#include "prm.h"
|
||
|
|
#include "prm-regbits-24xx.h"
|
||
|
|
|
||
|
|
void __iomem *prcm_clksrc_ctrl;
|
||
|
|
|
||
|
|
u32 omap2xxx_get_sysclkdiv(void)
|
||
|
|
{
|
||
|
|
u32 div;
|
||
|
|
|
||
|
|
div = __raw_readl(prcm_clksrc_ctrl);
|
||
|
|
div &= OMAP_SYSCLKDIV_MASK;
|
||
|
|
div >>= OMAP_SYSCLKDIV_SHIFT;
|
||
|
|
|
||
|
|
return div;
|
||
|
|
}
|
||
|
|
|
||
|
|
unsigned long omap2xxx_sys_clk_recalc(struct clk *clk)
|
||
|
|
{
|
||
|
|
return clk->parent->rate / omap2xxx_get_sysclkdiv();
|
||
|
|
}
|
||
|
|
|
||
|
|
|