75 строки
1.5 KiB
C
75 строки
1.5 KiB
C
/*
|
|
* clock2xxx.c - OMAP2xxx-specific clock integration 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/cpu.h>
|
|
#include <plat/clock.h>
|
|
|
|
#include "clock.h"
|
|
#include "clock2xxx.h"
|
|
#include "cm.h"
|
|
#include "cm-regbits-24xx.h"
|
|
|
|
struct clk *vclk, *sclk, *dclk;
|
|
|
|
/*
|
|
* Omap24xx specific clock functions
|
|
*/
|
|
|
|
/*
|
|
* Set clocks for bypass mode for reboot to work.
|
|
*/
|
|
void omap2xxx_clk_prepare_for_reboot(void)
|
|
{
|
|
u32 rate;
|
|
|
|
if (vclk == NULL || sclk == NULL)
|
|
return;
|
|
|
|
rate = clk_get_rate(sclk);
|
|
clk_set_rate(vclk, rate);
|
|
}
|
|
|
|
/*
|
|
* Switch the MPU rate if specified on cmdline. We cannot do this
|
|
* early until cmdline is parsed. XXX This should be removed from the
|
|
* clock code and handled by the OPP layer code in the near future.
|
|
*/
|
|
static int __init omap2xxx_clk_arch_init(void)
|
|
{
|
|
int ret;
|
|
|
|
if (!cpu_is_omap24xx())
|
|
return 0;
|
|
|
|
ret = omap2_clk_switch_mpurate_at_boot("virt_prcm_set");
|
|
if (!ret)
|
|
omap2_clk_print_new_rates("sys_ck", "dpll_ck", "mpu_ck");
|
|
|
|
return ret;
|
|
}
|
|
|
|
arch_initcall(omap2xxx_clk_arch_init);
|
|
|
|
|