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author | Wu Zhangjin <wuzhangjin@gmail.com> | 2010-01-27 22:39:46 +0800 |
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committer | Ralf Baechle <ralf@linux-mips.org> | 2010-02-27 12:53:17 +0100 |
commit | fc48c41af81b953578a54f80ad07d2f1efa81378 (patch) | |
tree | ef93c5ecfbd419ef835e14f44d10f20f9d4d3952 /arch/mips/loongson/common | |
parent | e52dd9fc6b9e0c17b220bd38371ff15032a1a155 (diff) | |
download | linux-stable-fc48c41af81b953578a54f80ad07d2f1efa81378.tar.gz linux-stable-fc48c41af81b953578a54f80ad07d2f1efa81378.tar.bz2 linux-stable-fc48c41af81b953578a54f80ad07d2f1efa81378.zip |
MIPS: Loongson: Cleanup the halt and poweroff action
In the old source code, I have let halt and poweroff do the same action,
but in reality, they have different meanings.
As the manpage of shutdown shows:
-r Reboot after shutdown.
-H Halt action is to halt or drop into boot monitor on systems that support it.
-P Halt action is to turn off the power.
and in the real world, some machines(e.g. NAS) did not provide a power
button and the shutdown works as reset, so, we need to provide a
mechanism to let the users turn off the power safely without breaking
the system, such a mechanism is "halt", which only put the system into a
dead loop or a power-save mode and print some information to the screen
to tell the users to turn off the power safely.
$ shutdown -hH now /* loongson_halt, not turn off the power */
$ shutdown -hP now /* loongson_poweroff, work as poweroff */
Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Tested-by: Liu Shiwei <liushiwei@gmail.com>
Cc: Liu Shiwei <liushiwei@gmail.com>
Cc: linux-mips <linux-mips@linux-mips.org>
Patchwork: http://patchwork.linux-mips.org/patch/883/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/loongson/common')
-rw-r--r-- | arch/mips/loongson/common/reset.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/arch/mips/loongson/common/reset.c b/arch/mips/loongson/common/reset.c index 33dff188b4de..4bd9c18b07a5 100644 --- a/arch/mips/loongson/common/reset.c +++ b/arch/mips/loongson/common/reset.c @@ -25,17 +25,26 @@ static void loongson_restart(char *command) ((void (*)(void))ioremap_nocache(LOONGSON_BOOT_BASE, 4)) (); } -static void loongson_halt(void) +static void loongson_poweroff(void) { mach_prepare_shutdown(); unreachable(); } +static void loongson_halt(void) +{ + pr_notice("\n\n** You can safely turn off the power now **\n\n"); + while (1) { + if (cpu_wait) + cpu_wait(); + } +} + static int __init mips_reboot_setup(void) { _machine_restart = loongson_restart; _machine_halt = loongson_halt; - pm_power_off = loongson_halt; + pm_power_off = loongson_poweroff; return 0; } |