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author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2012-05-24 01:13:01 -0700 |
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committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2012-05-24 01:13:01 -0700 |
commit | e644dae645e167d154c0526358940986682a72b0 (patch) | |
tree | 972993c6568085b8d407fc7e13de10f4b93c651d /arch/m68k/platform/coldfire/reset.c | |
parent | 899c612d74d4a242158a4db20367388d6299c028 (diff) | |
parent | 86809173ce32ef03bd4d0389dfc72df0c805e9c4 (diff) |
Merge branch 'next' into for-linus
Diffstat (limited to 'arch/m68k/platform/coldfire/reset.c')
-rw-r--r-- | arch/m68k/platform/coldfire/reset.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/arch/m68k/platform/coldfire/reset.c b/arch/m68k/platform/coldfire/reset.c new file mode 100644 index 00000000000..933e54eacc6 --- /dev/null +++ b/arch/m68k/platform/coldfire/reset.c @@ -0,0 +1,50 @@ +/* + * reset.c -- common ColdFire SoC reset support + * + * (C) Copyright 2012, Greg Ungerer <gerg@uclinux.org> + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive + * for more details. + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/io.h> +#include <asm/machdep.h> +#include <asm/coldfire.h> +#include <asm/mcfsim.h> + +/* + * There are 2 common methods amongst the ColdFure parts for reseting + * the CPU. But there are couple of exceptions, the 5272 and the 547x + * have something completely special to them, and we let their specific + * subarch code handle them. + */ + +#ifdef MCFSIM_SYPCR +static void mcf_cpu_reset(void) +{ + local_irq_disable(); + /* Set watchdog to soft reset, and enabled */ + __raw_writeb(0xc0, MCF_MBAR + MCFSIM_SYPCR); + for (;;) + /* wait for watchdog to timeout */; +} +#endif + +#ifdef MCF_RCR +static void mcf_cpu_reset(void) +{ + local_irq_disable(); + __raw_writeb(MCF_RCR_SWRESET, MCF_RCR); +} +#endif + +static int __init mcf_setup_reset(void) +{ + mach_reset = mcf_cpu_reset; + return 0; +} + +arch_initcall(mcf_setup_reset); |