u-boot/arch/arm/mach-at91/arm926ejs/reset.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * (C) Copyright 2007-2008
 * Stelian Pop <stelian@popies.net>
 * Lead Tech Design <www.leadtechdesign.com>
 */

#include <common.h>
#include <cpu_func.h>
#include <asm/io.h>
#include <asm/arch/hardware.h>
#include <asm/arch/at91_rstc.h>

/* Reset the cpu by telling the reset controller to do so */
void reset_cpu(void)
{
	at91_rstc_t *rstc = (at91_rstc_t *) ATMEL_BASE_RSTC;

	writel(AT91_RSTC_KEY
		| AT91_RSTC_CR_PROCRST	/* Processor Reset */
		| AT91_RSTC_CR_PERRST	/* Peripheral Reset */
#ifdef CONFIG_AT91RESET_EXTRST
		| AT91_RSTC_CR_EXTRST	/* External Reset (assert nRST pin) */
#endif
		, &rstc->cr);
	/* never reached */
	while (1)
		;
}
SPDX: Convert all of our single license tags to Linux Kernel style When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com> 2018-05-06 21:58:06 +00:00			`// SPDX-License-Identifier: GPL-2.0+`
at91: extract reset from timer Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> 2009-05-31 10:44:45 +00:00			`/*`
			`* (C) Copyright 2007-2008`
Fix Stelian's email address Change my old email address which is no longer valid. Signed-off-by: Stelian Pop <stelian@popies.net> Signed-off-by: Anatolij Gustschin <agust@denx.de> 2011-10-31 23:00:39 +00:00			`* Stelian Pop <stelian@popies.net>`
at91: extract reset from timer Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> 2009-05-31 10:44:45 +00:00			`* Lead Tech Design <www.leadtechdesign.com>`
			`*/`

			`#include <common.h>`
common: Move reset_cpu() to the CPU header Move this function out of common.h and into a relevant header file. Signed-off-by: Simon Glass <sjg@chromium.org> 2019-12-28 17:45:01 +00:00			`#include <cpu_func.h>`
AT91: change includes from asm/arch/io.h to asm/io.h and remove the now unused asm/arch-at91/io.h Signed-off-by: Reinhard Meyer <u-boot@emk-elektronik.de> 2010-11-07 12:26:14 +00:00			`#include <asm/io.h>`
at91: extract reset from timer Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> 2009-05-31 10:44:45 +00:00			`#include <asm/arch/hardware.h>`
			`#include <asm/arch/at91_rstc.h>`

AT91: reset.c: fix comments, add option Signed-off-by: Reinhard Meyer <u-boot@emk-elektronik.de> 2010-08-09 11:25:37 +00:00			`/* Reset the cpu by telling the reset controller to do so */`
reset: Remove addr parameter from reset_cpu() Historically, the reset_cpu() function had an `addr` parameter which was meant to pass in an address of the reset vector location, where the CPU should reset to. This feature is no longer used anywhere in U-Boot as all reset_cpu() implementations now ignore the passed value. Generic code has been added which always calls reset_cpu() with `0` which means this feature can no longer be used easily anyway. Over time, many implementations seem to have "misunderstood" the existence of this parameter as a way to customize/parameterize the reset (e.g. COLD vs WARM resets). As this is not properly supported, the code will almost always not do what it is intended to (because all call-sites just call reset_cpu() with 0). To avoid confusion and to clean up the codebase from unused left-overs of the past, remove the `addr` parameter entirely. Code which intends to support different kinds of resets should be rewritten as a sysreset driver instead. This transformation was done with the following coccinelle patch: @@ expression argvalue; @@ - reset_cpu(argvalue) + reset_cpu() @@ identifier argname; type argtype; @@ - reset_cpu(argtype argname) + reset_cpu(void) { ... } Signed-off-by: Harald Seiler <hws@denx.de> Reviewed-by: Simon Glass <sjg@chromium.org> 2020-12-15 15:47:52 +00:00			`void reset_cpu(void)`
at91: extract reset from timer Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> 2009-05-31 10:44:45 +00:00			`{`
AT91: fix related at91 system/driver files Signed-off-by: Reinhard Meyer <u-boot@emk-elektronik.de> 2010-11-03 14:39:55 +00:00			`at91_rstc_t rstc = (at91_rstc_t ) ATMEL_BASE_RSTC;`
convert common files to new SoC access * add's a warning to all files, which need update to new SoC access * convert common files in cpu/../at91 and a lot of drivers to use c stucture SoC access Signed-off-by: Jens Scharsig <js_at_ng@scharsoft.de> 2010-02-03 21:46:58 +00:00
AT91: reset.c: fix comments, add option Signed-off-by: Reinhard Meyer <u-boot@emk-elektronik.de> 2010-08-09 11:25:37 +00:00			`writel(AT91_RSTC_KEY`
			`\| AT91_RSTC_CR_PROCRST /* Processor Reset */`
			`\| AT91_RSTC_CR_PERRST /* Peripheral Reset */`
			`#ifdef CONFIG_AT91RESET_EXTRST`
			`\| AT91_RSTC_CR_EXTRST /* External Reset (assert nRST pin) */`
			`#endif`
			`, &rstc->cr);`
			`/* never reached */`
			`while (1)`
			`;`
at91: extract reset from timer Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> 2009-05-31 10:44:45 +00:00			`}`