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authorDavid S. Miller <davem@sunset.davemloft.net>2007-07-11 18:18:04 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2007-07-16 04:04:16 -0700
commit13077d80286205e02eebe1c2786a914a4bbd2588 (patch)
tree837b11e18353eaf6550ec9f831adedcada1986ef /arch/sparc64
parent2c4f4ecb7a421e0be6632d3366f0bc7cdf1e38b1 (diff)
downloadlinux-2.6.34-ux500-13077d80286205e02eebe1c2786a914a4bbd2588.tar.gz
[SPARC64]: Export powerd facilities for external entities.
Besides the existing usage for power-button interrupts, we'll want to make use of this code for domain-services where the LDOM manager can send reboot requests to the guest node. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc64')
-rw-r--r--arch/sparc64/kernel/power.c54
1 files changed, 31 insertions, 23 deletions
diff --git a/arch/sparc64/kernel/power.c b/arch/sparc64/kernel/power.c
index 5d6adea3967..8dd4294ad21 100644
--- a/arch/sparc64/kernel/power.c
+++ b/arch/sparc64/kernel/power.c
@@ -1,7 +1,6 @@
-/* $Id: power.c,v 1.10 2001/12/11 01:57:16 davem Exp $
- * power.c: Power management driver.
+/* power.c: Power management driver.
*
- * Copyright (C) 1999 David S. Miller (davem@redhat.com)
+ * Copyright (C) 1999, 2007 David S. Miller (davem@davemloft.net)
*/
#include <linux/kernel.h>
@@ -19,6 +18,7 @@
#include <asm/prom.h>
#include <asm/of_device.h>
#include <asm/io.h>
+#include <asm/power.h>
#include <asm/sstate.h>
#include <linux/unistd.h>
@@ -29,24 +29,26 @@
*/
int scons_pwroff = 1;
-#ifdef CONFIG_PCI
-#include <linux/pci.h>
static void __iomem *power_reg;
static DECLARE_WAIT_QUEUE_HEAD(powerd_wait);
static int button_pressed;
-static irqreturn_t power_handler(int irq, void *dev_id)
+void wake_up_powerd(void)
{
if (button_pressed == 0) {
button_pressed = 1;
wake_up(&powerd_wait);
}
+}
+
+static irqreturn_t power_handler(int irq, void *dev_id)
+{
+ wake_up_powerd();
/* FIXME: Check registers for status... */
return IRQ_HANDLED;
}
-#endif /* CONFIG_PCI */
extern void machine_halt(void);
extern void machine_alt_power_off(void);
@@ -56,19 +58,18 @@ void machine_power_off(void)
{
sstate_poweroff();
if (!serial_console || scons_pwroff) {
-#ifdef CONFIG_PCI
if (power_reg) {
/* Both register bits seem to have the
* same effect, so until I figure out
* what the difference is...
*/
writel(AUXIO_PCIO_CPWR_OFF | AUXIO_PCIO_SPWR_OFF, power_reg);
- } else
-#endif /* CONFIG_PCI */
+ } else {
if (poweroff_method != NULL) {
poweroff_method();
/* not reached */
}
+ }
}
machine_halt();
}
@@ -76,7 +77,6 @@ void machine_power_off(void)
void (*pm_power_off)(void) = machine_power_off;
EXPORT_SYMBOL(pm_power_off);
-#ifdef CONFIG_PCI
static int powerd(void *__unused)
{
static char *envp[] = { "HOME=/", "TERM=linux", "PATH=/sbin:/usr/sbin:/bin:/usr/bin", NULL };
@@ -86,7 +86,7 @@ static int powerd(void *__unused)
daemonize("powerd");
add_wait_queue(&powerd_wait, &wait);
-again:
+
for (;;) {
set_task_state(current, TASK_INTERRUPTIBLE);
if (button_pressed)
@@ -100,16 +100,28 @@ again:
/* Ok, down we go... */
button_pressed = 0;
if (kernel_execve("/sbin/shutdown", argv, envp) < 0) {
- printk("powerd: shutdown execution failed\n");
- add_wait_queue(&powerd_wait, &wait);
- goto again;
+ printk(KERN_ERR "powerd: shutdown execution failed\n");
+ machine_power_off();
}
return 0;
}
+int start_powerd(void)
+{
+ int err;
+
+ err = kernel_thread(powerd, NULL, CLONE_FS);
+ if (err < 0)
+ printk(KERN_ERR "power: Failed to start power daemon.\n");
+ else
+ printk(KERN_INFO "power: powerd running.\n");
+
+ return err;
+}
+
static int __init has_button_interrupt(unsigned int irq, struct device_node *dp)
{
- if (irq == PCI_IRQ_NONE)
+ if (irq == 0xffffffff)
return 0;
if (!of_find_property(dp, "button", NULL))
return 0;
@@ -130,17 +142,14 @@ static int __devinit power_probe(struct of_device *op, const struct of_device_id
poweroff_method = machine_halt; /* able to use the standard halt */
if (has_button_interrupt(irq, op->node)) {
- if (kernel_thread(powerd, NULL, CLONE_FS) < 0) {
- printk("Failed to start power daemon.\n");
+ if (start_powerd() < 0)
return 0;
- }
- printk("powerd running.\n");
if (request_irq(irq,
power_handler, 0, "power", NULL) < 0)
- printk("power: Error, cannot register IRQ handler.\n");
+ printk(KERN_ERR "power: Cannot setup IRQ handler.\n");
} else {
- printk("not using powerd.\n");
+ printk(KERN_INFO "power: Not using powerd.\n");
}
return 0;
@@ -164,4 +173,3 @@ void __init power_init(void)
of_register_driver(&power_driver, &of_bus_type);
return;
}
-#endif /* CONFIG_PCI */