add 'poweroff' command

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

commands/Kconfig

@@ -6,6 +6,10 @@ config COMMAND_SUPPORT
 	depends on !SHELL_NONE
 	default y
 
+config HAS_POWEROFF
+	bool
+	default n
+
 if COMMAND_SUPPORT
 
 menu "commands                      "
@@ -422,6 +426,11 @@ config CMD_RESET
 	tristate
 	prompt "reset"
 
+config CMD_POWEROFF
+	tristate
+	depends on HAS_POWEROFF
+	prompt "poweroff"
+
 config CMD_GO
 	tristate
 	prompt "go"

commands/Makefile

@@ -11,6 +11,7 @@ obj-$(CONFIG_CMD_EDIT)		+= edit.o
 obj-$(CONFIG_CMD_EXEC)		+= exec.o
 obj-$(CONFIG_CMD_SLEEP)		+= sleep.o
 obj-$(CONFIG_CMD_RESET)		+= reset.o
+obj-$(CONFIG_CMD_POWEROFF)	+= poweroff.o
 obj-$(CONFIG_CMD_GO)		+= go.o
 obj-$(CONFIG_NET)		+= net.o
 obj-$(CONFIG_CMD_PARTITION)	+= partition.o

commands/poweroff.c

@@ -0,0 +1,37 @@
+/*
+ * poweroff.c - turn board's power off
+ *
+ * Copyright (C) 2011 Antony Pavlov <antonynpavlov@gmail.com>
+ *
+ * This file is part of barebox.
+ * See file CREDITS for list of people who contributed to this project.
+ *
+ * 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.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <common.h>
+#include <command.h>
+
+static int cmd_poweroff(int argc, char *argv[])
+{
+	poweroff();
+
+	/* Not reached */
+	return 1;
+}
+
+BAREBOX_CMD_START(poweroff)
+	.cmd		= cmd_poweroff,
+	.usage		= "Perform POWER OFF of the board",
+BAREBOX_CMD_END

include/common.h

@@ -102,6 +102,7 @@ long	get_ram_size  (volatile long *, long);
 
 /* $(CPU)/cpu.c */
 void __noreturn reset_cpu(unsigned long addr);
+void __noreturn poweroff(void);
 
 /* lib_$(ARCH)/time.c */
 void	udelay (unsigned long);