restart: replace reset_cpu with registered restart handlers

This replaces the reset_cpu() function which every SoC or board must
provide with registered handlers. This makes it possible to have multiple
reset functions for boards which have multiple ways to reset the machine.
Also boards which have no way at all to reset the machine no longer
have to provide a dummy reset_cpu() function.

The problem this solves is that some machines have external PMICs or
similar to reset the system which have to be preferred over the
internal SoC reset, because the PMIC can reset not only the SoC but also
the external devices.

To pick the right way to reset a machine each handler has a priority. The
default priority is 100 and all currently existing restart handlers are
registered with this priority. of_get_restart_priority() allows to retrieve
the priority from the device tree which makes it possible for boards to
give certain restart handlers a higher priority in order to use this one
instead of the default one.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

2 files changed, 0 insertions, 32 deletions

diff --git a/arch/x86/mach-i386/Makefile b/arch/x86/mach-i386/Makefile
index e46aa5b5ee..225b4811c5 100644
--- a/arch/x86/mach-i386/Makefile
+++ b/arch/x86/mach-i386/Makefile
@@ -1,4 +1,2 @@
-obj-y += reset.o
-
 # reference clocksource
 obj-y += pit_timer.o
diff --git a/arch/x86/mach-i386/reset.c b/arch/x86/mach-i386/reset.c
deleted file mode 100644
index 65f7d35537..0000000000
--- a/arch/x86/mach-i386/reset.c
+++ /dev/null
@@ -1,30 +0,0 @@
-/*
- * Copyright (C) 2009 Juergen Beisert, Pengutronix
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- *
- */
-
-/**
- * @file
- * @brief Resetting an x86 CPU
- */
-
-#include <common.h>
-
-void __noreturn reset_cpu(unsigned long addr)
-{
-	/** How to reset the machine? */
-	while(1)
-		;
-}
-EXPORT_SYMBOL(reset_cpu);