[PATCH 36/44] mips: Register with kernel poweroff handler

[linux@roeck-us.net (Guenter Roeck)]

Register with kernel poweroff handler instead of setting pm_power_off
directly.

If there is an indication that there can be more than one poweroff handler,
use register_poweroff_handler, otherwise use register_poweroff_handler_simple
to register the poweroff handler.

If the poweroff handler only resets or stops the system, select a priority of
0 to indicate that the poweroff handler is one of last resort. If the poweroff
handler powers off the system, select a priority of 128, unless the poweroff
handler installation code suggests that there can be more than one poweroff
handler and the new handler is only installed conditionally. In this case,
select a priority of 64.

Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
 arch/mips/alchemy/board-gpr.c          |  2 +-
 arch/mips/alchemy/board-mtx1.c         |  2 +-
 arch/mips/alchemy/board-xxs1500.c      |  2 +-
 arch/mips/alchemy/devboards/platform.c | 17 +++++++++++++++--
 arch/mips/ar7/setup.c                  |  2 +-
 arch/mips/ath79/setup.c                |  2 +-
 arch/mips/bcm47xx/setup.c              |  2 +-
 arch/mips/bcm63xx/setup.c              |  2 +-
 arch/mips/cobalt/setup.c               |  2 +-
 arch/mips/dec/setup.c                  |  2 +-
 arch/mips/emma/markeins/setup.c        |  2 +-
 arch/mips/jz4740/reset.c               |  2 +-
 arch/mips/lantiq/falcon/reset.c        |  2 +-
 arch/mips/lantiq/xway/reset.c          |  2 +-
 arch/mips/lasat/reset.c                |  2 +-
 arch/mips/loongson/common/reset.c      |  2 +-
 arch/mips/loongson1/common/reset.c     |  2 +-
 arch/mips/mti-malta/malta-reset.c      |  2 +-
 arch/mips/mti-sead3/sead3-reset.c      |  2 +-
 arch/mips/netlogic/xlp/setup.c         |  2 +-
 arch/mips/netlogic/xlr/setup.c         |  2 +-
 arch/mips/pmcs-msp71xx/msp_setup.c     |  2 +-
 arch/mips/pnx833x/common/setup.c       |  2 +-
 arch/mips/ralink/reset.c               |  2 +-
 arch/mips/rb532/setup.c                |  2 +-
 arch/mips/sgi-ip22/ip22-reset.c        |  2 +-
 arch/mips/sgi-ip27/ip27-reset.c        |  2 +-
 arch/mips/sgi-ip32/ip32-reset.c        |  2 +-
 arch/mips/sibyte/common/cfe.c          |  2 +-
 arch/mips/sni/setup.c                  |  2 +-
 arch/mips/txx9/generic/setup.c         |  2 +-
 arch/mips/vr41xx/common/pmu.c          |  2 +-
 32 files changed, 46 insertions(+), 33 deletions(-)

diff --git a/arch/mips/alchemy/board-gpr.c b/arch/mips/alchemy/board-gpr.c
index acf9a2a..56190a3 100644
--- a/arch/mips/alchemy/board-gpr.c
+++ b/arch/mips/alchemy/board-gpr.c
@@ -89,7 +89,7 @@ void __init board_setup(void)
 {
 	printk(KERN_INFO "Trapeze ITS GPR board\n");
 
-	pm_power_off = gpr_power_off;
+	register_poweroff_handler_simple(gpr_power_off, 0);
 	_machine_halt = gpr_power_off;
 	_machine_restart = gpr_reset;
 
diff --git a/arch/mips/alchemy/board-mtx1.c b/arch/mips/alchemy/board-mtx1.c
index 1e3b102..e2b06b5 100644
--- a/arch/mips/alchemy/board-mtx1.c
+++ b/arch/mips/alchemy/board-mtx1.c
@@ -98,7 +98,7 @@ void __init board_setup(void)
 	alchemy_gpio_direction_output(211, 1);	/* green on */
 	alchemy_gpio_direction_output(212, 0);	/* red off */
 
-	pm_power_off = mtx1_power_off;
+	register_poweroff_handler_simple(mtx1_power_off, 0);
 	_machine_halt = mtx1_power_off;
 	_machine_restart = mtx1_reset;
 
diff --git a/arch/mips/alchemy/board-xxs1500.c b/arch/mips/alchemy/board-xxs1500.c
index 0fc53e0..aaa5f5f 100644
--- a/arch/mips/alchemy/board-xxs1500.c
+++ b/arch/mips/alchemy/board-xxs1500.c
@@ -79,7 +79,7 @@ void __init board_setup(void)
 {
 	u32 pin_func;
 
-	pm_power_off = xxs1500_power_off;
+	register_poweroff_handler_simple(xxs1500_power_off, 0);
 	_machine_halt = xxs1500_power_off;
 	_machine_restart = xxs1500_reset;
 
diff --git a/arch/mips/alchemy/devboards/platform.c b/arch/mips/alchemy/devboards/platform.c
index 8df86eb..1734f72 100644
--- a/arch/mips/alchemy/devboards/platform.c
+++ b/arch/mips/alchemy/devboards/platform.c
@@ -6,6 +6,7 @@
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/map.h>
 #include <linux/mtd/physmap.h>
+#include <linux/notifier.h>
 #include <linux/slab.h>
 #include <linux/platform_device.h>
 #include <linux/pm.h>
@@ -61,10 +62,22 @@ static void db1x_reset(char *c)
 	bcsr_write(BCSR_SYSTEM, 0);
 }
 
+static int db1x_power_off_notify(struct notifier *this,
+				 unsigned long unused1, void *unused2)
+{
+	db1x_power_off();
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block db1x_poweroff_nb = {
+	.notifier_call = db1x_power_off_notify,
+	.priority = 64,
+}
+
 static int __init db1x_late_setup(void)
 {
-	if (!pm_power_off)
-		pm_power_off = db1x_power_off;
+	if (register_poweroff_handler(&db1x_poweroff_nb))
+		pr_err("dbx1: Failed to register poweroff handler\n");
 	if (!_machine_halt)
 		_machine_halt = db1x_power_off;
 	if (!_machine_restart)
diff --git a/arch/mips/ar7/setup.c b/arch/mips/ar7/setup.c
index 820b7a3..464067e 100644
--- a/arch/mips/ar7/setup.c
+++ b/arch/mips/ar7/setup.c
@@ -91,7 +91,7 @@ void __init plat_mem_setup(void)
 
 	_machine_restart = ar7_machine_restart;
 	_machine_halt = ar7_machine_halt;
-	pm_power_off = ar7_machine_power_off;
+	register_poweroff_handler_simple(ar7_machine_power_off, 128);
 
 	io_base = (unsigned long)ioremap(AR7_REGS_BASE, 0x10000);
 	if (!io_base)
diff --git a/arch/mips/ath79/setup.c b/arch/mips/ath79/setup.c
index 64807a4..ce9754e 100644
--- a/arch/mips/ath79/setup.c
+++ b/arch/mips/ath79/setup.c
@@ -203,7 +203,7 @@ void __init plat_mem_setup(void)
 
 	_machine_restart = ath79_restart;
 	_machine_halt = ath79_halt;
-	pm_power_off = ath79_halt;
+	register_poweroff_handler_simple(ath79_halt, 0);
 }
 
 void __init plat_time_init(void)
diff --git a/arch/mips/bcm47xx/setup.c b/arch/mips/bcm47xx/setup.c
index ad439c2..d0841f6 100644
--- a/arch/mips/bcm47xx/setup.c
+++ b/arch/mips/bcm47xx/setup.c
@@ -242,7 +242,7 @@ void __init plat_mem_setup(void)
 
 	_machine_restart = bcm47xx_machine_restart;
 	_machine_halt = bcm47xx_machine_halt;
-	pm_power_off = bcm47xx_machine_halt;
+	register_poweroff_handler_simple(bcm47xx_machine_halt, 0);
 	bcm47xx_board_detect();
 	mips_set_machine_name(bcm47xx_board_get_name());
 }
diff --git a/arch/mips/bcm63xx/setup.c b/arch/mips/bcm63xx/setup.c
index 6660c7d..80a5893 100644
--- a/arch/mips/bcm63xx/setup.c
+++ b/arch/mips/bcm63xx/setup.c
@@ -149,7 +149,7 @@ void __init plat_mem_setup(void)
 
 	_machine_halt = bcm63xx_machine_halt;
 	_machine_restart = __bcm63xx_machine_reboot;
-	pm_power_off = bcm63xx_machine_halt;
+	register_poweroff_handler_simple(bcm63xx_machine_halt, 0);
 
 	set_io_port_base(0);
 	ioport_resource.start = 0;
diff --git a/arch/mips/cobalt/setup.c b/arch/mips/cobalt/setup.c
index 9a8c2fe..146406f 100644
--- a/arch/mips/cobalt/setup.c
+++ b/arch/mips/cobalt/setup.c
@@ -78,7 +78,7 @@ void __init plat_mem_setup(void)
 
 	_machine_restart = cobalt_machine_restart;
 	_machine_halt = cobalt_machine_halt;
-	pm_power_off = cobalt_machine_halt;
+	register_poweroff_handler_simple(cobalt_machine_halt, 0);
 
 	set_io_port_base(CKSEG1ADDR(GT_DEF_PCI0_IO_BASE));
 
diff --git a/arch/mips/dec/setup.c b/arch/mips/dec/setup.c
index 41bbffd..8aea997 100644
--- a/arch/mips/dec/setup.c
+++ b/arch/mips/dec/setup.c
@@ -158,7 +158,7 @@ void __init plat_mem_setup(void)
 
 	_machine_restart = dec_machine_restart;
 	_machine_halt = dec_machine_halt;
-	pm_power_off = dec_machine_power_off;
+	register_poweroff_handler_simple(dec_machine_power_off, 128);
 
 	ioport_resource.start = ~0UL;
 	ioport_resource.end = 0UL;
diff --git a/arch/mips/emma/markeins/setup.c b/arch/mips/emma/markeins/setup.c
index 9100122..e2ec2e5 100644
--- a/arch/mips/emma/markeins/setup.c
+++ b/arch/mips/emma/markeins/setup.c
@@ -103,7 +103,7 @@ void __init plat_mem_setup(void)
 
 	_machine_restart = markeins_machine_restart;
 	_machine_halt = markeins_machine_halt;
-	pm_power_off = markeins_machine_power_off;
+	register_poweroff_handler_simple(markeins_machine_power_off, 0);
 
 	/* setup resource limits */
 	ioport_resource.start = EMMA2RH_PCI_IO_BASE;
diff --git a/arch/mips/jz4740/reset.c b/arch/mips/jz4740/reset.c
index b6c6343..3659e62 100644
--- a/arch/mips/jz4740/reset.c
+++ b/arch/mips/jz4740/reset.c
@@ -114,5 +114,5 @@ void jz4740_reset_init(void)
 {
 	_machine_restart = jz4740_restart;
 	_machine_halt = jz4740_halt;
-	pm_power_off = jz4740_power_off;
+	register_poweroff_handler_simple(jz4740_power_off, 128);
 }
diff --git a/arch/mips/lantiq/falcon/reset.c b/arch/mips/lantiq/falcon/reset.c
index 5682482..efd4ee2 100644
--- a/arch/mips/lantiq/falcon/reset.c
+++ b/arch/mips/lantiq/falcon/reset.c
@@ -83,7 +83,7 @@ static int __init mips_reboot_setup(void)
 {
 	_machine_restart = machine_restart;
 	_machine_halt = machine_halt;
-	pm_power_off = machine_power_off;
+	register_poweroff_handler_simple(machine_power_off, 0);
 	return 0;
 }
 
diff --git a/arch/mips/lantiq/xway/reset.c b/arch/mips/lantiq/xway/reset.c
index 1fa0f17..b698032 100644
--- a/arch/mips/lantiq/xway/reset.c
+++ b/arch/mips/lantiq/xway/reset.c
@@ -157,7 +157,7 @@ static int __init mips_reboot_setup(void)
 
 	_machine_restart = ltq_machine_restart;
 	_machine_halt = ltq_machine_halt;
-	pm_power_off = ltq_machine_power_off;
+	register_poweroff_handler_simple(ltq_machine_power_off, 0);
 
 	return 0;
 }
diff --git a/arch/mips/lasat/reset.c b/arch/mips/lasat/reset.c
index e21f0b9..9a07a88 100644
--- a/arch/mips/lasat/reset.c
+++ b/arch/mips/lasat/reset.c
@@ -56,5 +56,5 @@ void lasat_reboot_setup(void)
 {
 	_machine_restart = lasat_machine_restart;
 	_machine_halt = lasat_machine_halt;
-	pm_power_off = lasat_machine_halt;
+	register_poweroff_handler_simple(lasat_machine_halt, 0);
 }
diff --git a/arch/mips/loongson/common/reset.c b/arch/mips/loongson/common/reset.c
index a60715e..e251519 100644
--- a/arch/mips/loongson/common/reset.c
+++ b/arch/mips/loongson/common/reset.c
@@ -84,7 +84,7 @@ static int __init mips_reboot_setup(void)
 {
 	_machine_restart = loongson_restart;
 	_machine_halt = loongson_halt;
-	pm_power_off = loongson_poweroff;
+	register_poweroff_handler_simple(loongson_poweroff, 128);
 
 	return 0;
 }
diff --git a/arch/mips/loongson1/common/reset.c b/arch/mips/loongson1/common/reset.c
index 547f34b..fbb563a 100644
--- a/arch/mips/loongson1/common/reset.c
+++ b/arch/mips/loongson1/common/reset.c
@@ -38,7 +38,7 @@ static int __init ls1x_reboot_setup(void)
 {
 	_machine_restart = ls1x_restart;
 	_machine_halt = ls1x_halt;
-	pm_power_off = ls1x_power_off;
+	register_poweroff_handler_simple(ls1x_power_off, 0);
 
 	return 0;
 }
diff --git a/arch/mips/mti-malta/malta-reset.c b/arch/mips/mti-malta/malta-reset.c
index 2fd2cc2..632ce7c 100644
--- a/arch/mips/mti-malta/malta-reset.c
+++ b/arch/mips/mti-malta/malta-reset.c
@@ -40,7 +40,7 @@ static int __init mips_reboot_setup(void)
 {
 	_machine_restart = mips_machine_restart;
 	_machine_halt = mips_machine_halt;
-	pm_power_off = mips_machine_power_off;
+	register_poweroff_handler_simple(mips_machine_power_off, 128);
 
 	return 0;
 }
diff --git a/arch/mips/mti-sead3/sead3-reset.c b/arch/mips/mti-sead3/sead3-reset.c
index e6fb244..d1df04f 100644
--- a/arch/mips/mti-sead3/sead3-reset.c
+++ b/arch/mips/mti-sead3/sead3-reset.c
@@ -33,7 +33,7 @@ static int __init mips_reboot_setup(void)
 {
 	_machine_restart = mips_machine_restart;
 	_machine_halt = mips_machine_halt;
-	pm_power_off = mips_machine_halt;
+	register_poweroff_handler_simple(mips_machine_halt, 0);
 
 	return 0;
 }
diff --git a/arch/mips/netlogic/xlp/setup.c b/arch/mips/netlogic/xlp/setup.c
index 4fdd9fd..4982302 100644
--- a/arch/mips/netlogic/xlp/setup.c
+++ b/arch/mips/netlogic/xlp/setup.c
@@ -106,7 +106,7 @@ void __init plat_mem_setup(void)
 #endif
 	_machine_restart = (void (*)(char *))nlm_linux_exit;
 	_machine_halt	= nlm_linux_exit;
-	pm_power_off	= nlm_linux_exit;
+	register_poweroff_handler_simple(nlm_linux_exit, 0);
 
 	/* memory and bootargs from DT */
 	xlp_early_init_devtree();
diff --git a/arch/mips/netlogic/xlr/setup.c b/arch/mips/netlogic/xlr/setup.c
index d118b9a..5149dd4 100644
--- a/arch/mips/netlogic/xlr/setup.c
+++ b/arch/mips/netlogic/xlr/setup.c
@@ -75,7 +75,7 @@ void __init plat_mem_setup(void)
 {
 	_machine_restart = (void (*)(char *))nlm_linux_exit;
 	_machine_halt	= nlm_linux_exit;
-	pm_power_off	= nlm_linux_exit;
+	register_poweroff_handler_simple(nlm_linux_exit, 0);
 }
 
 const char *get_system_type(void)
diff --git a/arch/mips/pmcs-msp71xx/msp_setup.c b/arch/mips/pmcs-msp71xx/msp_setup.c
index 4f925e0..67699e30 100644
--- a/arch/mips/pmcs-msp71xx/msp_setup.c
+++ b/arch/mips/pmcs-msp71xx/msp_setup.c
@@ -144,7 +144,7 @@ void __init plat_mem_setup(void)
 {
 	_machine_restart = msp_restart;
 	_machine_halt = msp_halt;
-	pm_power_off = msp_power_off;
+	register_poweroff_handler_simple(msp_power_off, 0);
 }
 
 void __init prom_init(void)
diff --git a/arch/mips/pnx833x/common/setup.c b/arch/mips/pnx833x/common/setup.c
index 99b4d94..7c12665 100644
--- a/arch/mips/pnx833x/common/setup.c
+++ b/arch/mips/pnx833x/common/setup.c
@@ -51,7 +51,7 @@ int __init plat_mem_setup(void)
 
 	_machine_restart = pnx833x_machine_restart;
 	_machine_halt = pnx833x_machine_halt;
-	pm_power_off = pnx833x_machine_power_off;
+	register_poweroff_handler_simple(pnx833x_machine_power_off, 128);
 
 	/* IO/MEM resources. */
 	set_io_port_base(KSEG1);
diff --git a/arch/mips/ralink/reset.c b/arch/mips/ralink/reset.c
index 55c7ec5..e640e9e 100644
--- a/arch/mips/ralink/reset.c
+++ b/arch/mips/ralink/reset.c
@@ -98,7 +98,7 @@ static int __init mips_reboot_setup(void)
 {
 	_machine_restart = ralink_restart;
 	_machine_halt = ralink_halt;
-	pm_power_off = ralink_halt;
+	register_poweroff_handler_simple(ralink_halt, 0);
 
 	return 0;
 }
diff --git a/arch/mips/rb532/setup.c b/arch/mips/rb532/setup.c
index d0c64e7..c71a623 100644
--- a/arch/mips/rb532/setup.c
+++ b/arch/mips/rb532/setup.c
@@ -44,7 +44,7 @@ void __init plat_mem_setup(void)
 
 	_machine_restart = rb_machine_restart;
 	_machine_halt = rb_machine_halt;
-	pm_power_off = rb_machine_halt;
+	register_poweroff_handler-simple(rb_machine_halt, 0);
 
 	set_io_port_base(KSEG1);
 
diff --git a/arch/mips/sgi-ip22/ip22-reset.c b/arch/mips/sgi-ip22/ip22-reset.c
index 063c2dd..466e710 100644
--- a/arch/mips/sgi-ip22/ip22-reset.c
+++ b/arch/mips/sgi-ip22/ip22-reset.c
@@ -188,7 +188,7 @@ static int __init reboot_setup(void)
 
 	_machine_restart = sgi_machine_restart;
 	_machine_halt = sgi_machine_halt;
-	pm_power_off = sgi_machine_power_off;
+	register_poweroff_handler_simple(sgi_machine_power_off, 128);
 
 	res = request_irq(SGI_PANEL_IRQ, panel_int, 0, "Front Panel", NULL);
 	if (res) {
diff --git a/arch/mips/sgi-ip27/ip27-reset.c b/arch/mips/sgi-ip27/ip27-reset.c
index ac37e54..c26f04a 100644
--- a/arch/mips/sgi-ip27/ip27-reset.c
+++ b/arch/mips/sgi-ip27/ip27-reset.c
@@ -76,5 +76,5 @@ void ip27_reboot_setup(void)
 {
 	_machine_restart = ip27_machine_restart;
 	_machine_halt = ip27_machine_halt;
-	pm_power_off = ip27_machine_power_off;
+	register_poweroff_handler_simple(ip27_machine_power_off, 0);
 }
diff --git a/arch/mips/sgi-ip32/ip32-reset.c b/arch/mips/sgi-ip32/ip32-reset.c
index 1f823da..88d8692 100644
--- a/arch/mips/sgi-ip32/ip32-reset.c
+++ b/arch/mips/sgi-ip32/ip32-reset.c
@@ -189,7 +189,7 @@ static __init int ip32_reboot_setup(void)
 
 	_machine_restart = ip32_machine_restart;
 	_machine_halt = ip32_machine_halt;
-	pm_power_off = ip32_machine_power_off;
+	register_poweroff_handler_simple(ip32_machine_power_off, 0);
 
 	init_timer(&blink_timer);
 	blink_timer.function = blink_timeout;
diff --git a/arch/mips/sibyte/common/cfe.c b/arch/mips/sibyte/common/cfe.c
index 588e180..069de27 100644
--- a/arch/mips/sibyte/common/cfe.c
+++ b/arch/mips/sibyte/common/cfe.c
@@ -245,7 +245,7 @@ void __init prom_init(void)
 
 	_machine_restart   = cfe_linux_restart;
 	_machine_halt	   = cfe_linux_halt;
-	pm_power_off = cfe_linux_halt;
+	register_poweroff_handler_simple(cfe_linux_halt, 0);
 
 	/*
 	 * Check if a loader was used; if NOT, the 4 arguments are
diff --git a/arch/mips/sni/setup.c b/arch/mips/sni/setup.c
index efad85c..5242bd9 100644
--- a/arch/mips/sni/setup.c
+++ b/arch/mips/sni/setup.c
@@ -225,7 +225,7 @@ void __init plat_mem_setup(void)
 	}
 
 	_machine_restart = sni_machine_restart;
-	pm_power_off = sni_machine_power_off;
+	register_poweroff_handler_simple(sni_machine_power_off, 128);
 
 	sni_display_setup();
 	sni_console_setup();
diff --git a/arch/mips/txx9/generic/setup.c b/arch/mips/txx9/generic/setup.c
index 9ff200a..c429a4f 100644
--- a/arch/mips/txx9/generic/setup.c
+++ b/arch/mips/txx9/generic/setup.c
@@ -555,7 +555,7 @@ void __init plat_mem_setup(void)
 	/* fallback restart/halt routines */
 	_machine_restart = (void (*)(char *))txx9_machine_halt;
 	_machine_halt = txx9_machine_halt;
-	pm_power_off = txx9_machine_halt;
+	register_poweroff_handler_simple(txx9_machine_halt, 0);
 
 #ifdef CONFIG_PCI
 	pcibios_plat_setup = txx9_pcibios_setup;
diff --git a/arch/mips/vr41xx/common/pmu.c b/arch/mips/vr41xx/common/pmu.c
index d7f7558..4d947ab 100644
--- a/arch/mips/vr41xx/common/pmu.c
+++ b/arch/mips/vr41xx/common/pmu.c
@@ -127,7 +127,7 @@ static int __init vr41xx_pmu_init(void)
 	cpu_wait = vr41xx_cpu_wait;
 	_machine_restart = vr41xx_restart;
 	_machine_halt = vr41xx_halt;
-	pm_power_off = vr41xx_halt;
+	register_poweroff_handler_simple(vr41xx_halt, 0);
 
 	return 0;
 }
-- 
1.9.1