764f2579d9
Use linux/of_device.h instead. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
119 lines
2.5 KiB
C
119 lines
2.5 KiB
C
/* power.c: Power management driver.
|
|
*
|
|
* Copyright (C) 1999, 2007 David S. Miller (davem@davemloft.net)
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/sched.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 <linux/of_device.h>
|
|
|
|
#include <asm/system.h>
|
|
#include <asm/auxio.h>
|
|
#include <asm/prom.h>
|
|
#include <asm/io.h>
|
|
#include <asm/sstate.h>
|
|
#include <asm/reboot.h>
|
|
|
|
#include <linux/unistd.h>
|
|
|
|
/*
|
|
* sysctl - toggle power-off restriction for serial console
|
|
* systems in machine_power_off()
|
|
*/
|
|
int scons_pwroff = 1;
|
|
|
|
static void __iomem *power_reg;
|
|
|
|
static irqreturn_t power_handler(int irq, void *dev_id)
|
|
{
|
|
orderly_poweroff(true);
|
|
|
|
/* FIXME: Check registers for status... */
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static void (*poweroff_method)(void) = machine_alt_power_off;
|
|
|
|
void machine_power_off(void)
|
|
{
|
|
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 {
|
|
if (poweroff_method != NULL) {
|
|
poweroff_method();
|
|
/* not reached */
|
|
}
|
|
}
|
|
}
|
|
machine_halt();
|
|
}
|
|
|
|
void (*pm_power_off)(void) = machine_power_off;
|
|
EXPORT_SYMBOL(pm_power_off);
|
|
|
|
static int __init has_button_interrupt(unsigned int irq, struct device_node *dp)
|
|
{
|
|
if (irq == 0xffffffff)
|
|
return 0;
|
|
if (!of_find_property(dp, "button", NULL))
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int __devinit power_probe(struct of_device *op, const struct of_device_id *match)
|
|
{
|
|
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);
|
|
|
|
poweroff_method = machine_halt; /* able to use the standard halt */
|
|
|
|
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 = {
|
|
.match_table = power_match,
|
|
.probe = power_probe,
|
|
.driver = {
|
|
.name = "power",
|
|
},
|
|
};
|
|
|
|
void __init power_init(void)
|
|
{
|
|
of_register_driver(&power_driver, &of_platform_bus_type);
|
|
return;
|
|
}
|