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linux-next/arch/arm/mach-omap2/prcm.c
Paul Walmsley 445959821f ARM: OMAP2: Change 24xx to use new register access
This patch changes 24xx to use new register access, except for clock
framework. Clock framework register access will get updates in the
next patch.

Note that board-*.c files change GPMC (General Purpose Memory Controller)
access to use gpmc_cs_write_reg() instead of accessing the registers
directly. The code also uses gpmc_fck instead of it's parent clock
core_l3_ck for GPMC clock.

The H4 board file also adds h4_init_flash() function, which specify the
flash start and end addresses.

Also note that sleep.S removes some unused registers addresses.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2008-04-14 10:29:37 -07:00

44 lines
1.1 KiB
C

/*
* linux/arch/arm/mach-omap2/prcm.c
*
* OMAP 24xx Power Reset and Clock Management (PRCM) functions
*
* Copyright (C) 2005 Nokia Corporation
*
* Written by Tony Lindgren <tony.lindgren@nokia.com>
*
* Some pieces of code Copyright (C) 2005 Texas Instruments, 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.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/clk.h>
#include <asm/io.h>
#include "prm.h"
#include "prm-regbits-24xx.h"
extern void omap2_clk_prepare_for_reboot(void);
u32 omap_prcm_get_reset_sources(void)
{
return prm_read_mod_reg(WKUP_MOD, RM_RSTST) & 0x7f;
}
EXPORT_SYMBOL(omap_prcm_get_reset_sources);
/* Resets clock rates and reboots the system. Only called from system.h */
void omap_prcm_arch_reset(char mode)
{
u32 wkup;
omap2_clk_prepare_for_reboot();
if (cpu_is_omap24xx()) {
wkup = prm_read_mod_reg(WKUP_MOD, RM_RSTCTRL) | OMAP_RST_DPLL3;
prm_write_mod_reg(wkup, WKUP_MOD, RM_RSTCTRL);
}
}