-/* $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)
*/
-#define __KERNEL_SYSCALLS__
-
-#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/signal.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
+#include <linux/pm.h>
+#include <linux/syscalls.h>
+#include <linux/reboot.h>
#include <asm/system.h>
-#include <asm/ebus.h>
#include <asm/auxio.h>
+#include <asm/prom.h>
+#include <asm/of_device.h>
+#include <asm/io.h>
+#include <asm/sstate.h>
#include <linux/unistd.h>
*/
int scons_pwroff = 1;
-#ifdef CONFIG_PCI
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, struct pt_regs *regs)
+static irqreturn_t power_handler(int irq, void *dev_id)
{
- if (button_pressed == 0) {
- button_pressed = 1;
- wake_up(&powerd_wait);
- }
+ orderly_poweroff(true);
/* FIXME: Check registers for status... */
return IRQ_HANDLED;
}
-#endif /* CONFIG_PCI */
extern void machine_halt(void);
extern void machine_alt_power_off(void);
void machine_power_off(void)
{
- if (!serial_console || scons_pwroff) {
-#ifdef CONFIG_PCI
+ sstate_poweroff();
+ if (strcmp(of_console_device->type, "serial") || scons_pwroff) {
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();
}
-#ifdef CONFIG_PCI
-static int powerd(void *__unused)
-{
- static char *envp[] = { "HOME=/", "TERM=linux", "PATH=/sbin:/usr/sbin:/bin:/usr/bin", NULL };
- char *argv[] = { "/sbin/shutdown", "-h", "now", NULL };
- DECLARE_WAITQUEUE(wait, current);
-
- daemonize("powerd");
-
- add_wait_queue(&powerd_wait, &wait);
-again:
- for (;;) {
- set_task_state(current, TASK_INTERRUPTIBLE);
- if (button_pressed)
- break;
- flush_signals(current);
- schedule();
- }
- __set_current_state(TASK_RUNNING);
- remove_wait_queue(&powerd_wait, &wait);
-
- /* Ok, down we go... */
- button_pressed = 0;
- if (execve("/sbin/shutdown", argv, envp) < 0) {
- printk("powerd: shutdown execution failed\n");
- add_wait_queue(&powerd_wait, &wait);
- goto again;
- }
- return 0;
-}
+void (*pm_power_off)(void) = machine_power_off;
+EXPORT_SYMBOL(pm_power_off);
-static int __init has_button_interrupt(struct linux_ebus_device *edev)
+static int __init has_button_interrupt(unsigned int irq, struct device_node *dp)
{
- if (edev->irqs[0] == PCI_IRQ_NONE)
+ if (irq == 0xffffffff)
return 0;
- if (!prom_node_has_property(edev->prom_node, "button"))
+ if (!of_find_property(dp, "button", NULL))
return 0;
return 1;
}
-void __init power_init(void)
+static int __devinit power_probe(struct of_device *op, const struct of_device_id *match)
{
- struct linux_ebus *ebus;
- struct linux_ebus_device *edev;
- static int invoked;
-
- if (invoked)
- return;
- invoked = 1;
-
- for_each_ebus(ebus) {
- for_each_ebusdev(edev, ebus) {
- if (!strcmp(edev->prom_name, "power"))
- goto found;
- }
- }
- return;
+ struct resource *res = &op->resource[0];
+ unsigned int irq= op->irqs[0];
+
+ power_reg = of_ioremap(res, 0, 0x4, "power");
+
+ printk(KERN_INFO "%s: Control reg at %lx\n",
+ op->node->name, res->start);
-found:
- power_reg = ioremap(edev->resource[0].start, 0x4);
- printk("power: Control reg at %p ... ", power_reg);
poweroff_method = machine_halt; /* able to use the standard halt */
- if (has_button_interrupt(edev)) {
- if (kernel_thread(powerd, NULL, CLONE_FS) < 0) {
- printk("Failed to start power daemon.\n");
- return;
- }
- printk("powerd running.\n");
- if (request_irq(edev->irqs[0],
- power_handler, SA_SHIRQ, "power", NULL) < 0)
- printk("power: Error, cannot register IRQ handler.\n");
- } else {
- printk("not using powerd.\n");
+ if (has_button_interrupt(irq, op->node)) {
+ if (request_irq(irq,
+ power_handler, 0, "power", NULL) < 0)
+ printk(KERN_ERR "power: Cannot setup IRQ handler.\n");
}
+
+ return 0;
+}
+
+static struct of_device_id power_match[] = {
+ {
+ .name = "power",
+ },
+ {},
+};
+
+static struct of_platform_driver power_driver = {
+ .name = "power",
+ .match_table = power_match,
+ .probe = power_probe,
+};
+
+void __init power_init(void)
+{
+ of_register_driver(&power_driver, &of_platform_bus_type);
+ return;
}
-#endif /* CONFIG_PCI */
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff