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Greg UngererandGreg Ungerer
e629342493
Convert all ColdFire specific system setup code to only use the newly created internal register access methods. This is replacing the mixed and inconsistent use of readx/writex and __raw_readx/__raw_writex for internal SoC registers. Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Ungerer <gerg@linux-m68k.org>
51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
/*
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* reset.c -- common ColdFire SoC reset support
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*
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* (C) Copyright 2012, Greg Ungerer <gerg@uclinux.org>
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive
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* for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <asm/machdep.h>
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#include <asm/coldfire.h>
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#include <asm/mcfsim.h>
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/*
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* There are 2 common methods amongst the ColdFure parts for reseting
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* the CPU. But there are couple of exceptions, the 5272 and the 547x
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* have something completely special to them, and we let their specific
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* subarch code handle them.
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*/
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#ifdef MCFSIM_SYPCR
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static void mcf_cpu_reset(void)
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{
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local_irq_disable();
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/* Set watchdog to soft reset, and enabled */
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mcf_write8(0xc0, MCFSIM_SYPCR);
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for (;;)
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/* wait for watchdog to timeout */;
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}
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#endif
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#ifdef MCF_RCR
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static void mcf_cpu_reset(void)
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{
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local_irq_disable();
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mcf_write8(MCF_RCR_SWRESET, MCF_RCR);
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}
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#endif
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static int __init mcf_setup_reset(void)
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{
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mach_reset = mcf_cpu_reset;
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return 0;
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}
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arch_initcall(mcf_setup_reset);
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