forked from Minki/linux
44da0a5103
Move the sys_clk clock functions from clock2xxx.c to mach-omap2/clkt2xxx_sys.c. This is intended to make the clock code easier to understand, since all of the functions needed to manage the sys_clk are now located in their own file, rather than being mixed with other, unrelated functions. Clock debugging is also now more finely-grained, since the DEBUG macro can now be defined for the sys_clk clock alone. This should reduce unnecessary console noise when debugging. Also, if at some future point the mach-omap2/ directory is split into OMAP2/3/4 variants, this clkt file can be placed in the mach-omap2xxx/ directory, rather than shared with other chip types that don't use this clock type. Thanks to Alexander Shishkin <virtuoso@slind.org> for his comments to improve the patch description. Signed-off-by: Paul Walmsley <paul@pwsan.com> Cc: Alexander Shishkin <virtuoso@slind.org>
51 lines
1.0 KiB
C
51 lines
1.0 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();
|
|
}
|
|
|
|
|