2007-07-11 19:18:04 -06:00
|
|
|
/* power.c: Power management driver.
|
2005-04-16 16:20:36 -06:00
|
|
|
*
|
2008-08-30 02:18:56 -06:00
|
|
|
* Copyright (C) 1999, 2007, 2008 David S. Miller (davem@davemloft.net)
|
2005-04-16 16:20:36 -06:00
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/kernel.h>
|
2011-07-22 11:18:16 -06:00
|
|
|
#include <linux/export.h>
|
2005-04-16 16:20:36 -06:00
|
|
|
#include <linux/init.h>
|
|
|
|
#include <linux/interrupt.h>
|
2007-07-18 14:12:45 -06:00
|
|
|
#include <linux/reboot.h>
|
2008-08-07 16:33:36 -06:00
|
|
|
#include <linux/of_device.h>
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2006-06-29 16:22:46 -06:00
|
|
|
#include <asm/prom.h>
|
|
|
|
#include <asm/io.h>
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
static void __iomem *power_reg;
|
|
|
|
|
2007-07-11 19:18:04 -06:00
|
|
|
static irqreturn_t power_handler(int irq, void *dev_id)
|
|
|
|
{
|
2007-07-18 14:12:45 -06:00
|
|
|
orderly_poweroff(true);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/* FIXME: Check registers for status... */
|
|
|
|
return IRQ_HANDLED;
|
|
|
|
}
|
|
|
|
|
2012-12-21 15:03:26 -07:00
|
|
|
static int has_button_interrupt(unsigned int irq, struct device_node *dp)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2007-07-11 19:18:04 -06:00
|
|
|
if (irq == 0xffffffff)
|
2005-04-16 16:20:36 -06:00
|
|
|
return 0;
|
2006-06-22 20:12:03 -06:00
|
|
|
if (!of_find_property(dp, "button", NULL))
|
2005-04-16 16:20:36 -06:00
|
|
|
return 0;
|
|
|
|
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
2012-12-21 15:03:26 -07:00
|
|
|
static int power_probe(struct platform_device *op)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2006-06-29 16:22:46 -06:00
|
|
|
struct resource *res = &op->resource[0];
|
2010-06-18 11:09:58 -06:00
|
|
|
unsigned int irq = op->archdata.irqs[0];
|
2006-06-23 02:44:10 -06:00
|
|
|
|
2006-06-29 16:22:46 -06:00
|
|
|
power_reg = of_ioremap(res, 0, 0x4, "power");
|
|
|
|
|
2009-01-06 14:19:28 -07:00
|
|
|
printk(KERN_INFO "%s: Control reg at %llx\n",
|
2010-04-13 17:12:29 -06:00
|
|
|
op->dev.of_node->name, res->start);
|
2006-06-23 02:44:10 -06:00
|
|
|
|
2010-04-13 17:12:29 -06:00
|
|
|
if (has_button_interrupt(irq, op->dev.of_node)) {
|
2005-10-06 21:43:54 -06:00
|
|
|
if (request_irq(irq,
|
2006-06-29 15:39:11 -06:00
|
|
|
power_handler, 0, "power", NULL) < 0)
|
2007-07-11 19:18:04 -06:00
|
|
|
printk(KERN_ERR "power: Cannot setup IRQ handler.\n");
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
2006-06-29 16:22:46 -06:00
|
|
|
|
|
|
|
return 0;
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
2006-06-23 02:44:10 -06:00
|
|
|
|
2011-03-30 18:37:56 -06:00
|
|
|
static const struct of_device_id power_match[] = {
|
2006-06-23 02:44:10 -06:00
|
|
|
{
|
|
|
|
.name = "power",
|
|
|
|
},
|
|
|
|
{},
|
|
|
|
};
|
|
|
|
|
2011-02-22 20:01:33 -07:00
|
|
|
static struct platform_driver power_driver = {
|
2006-06-29 16:22:46 -06:00
|
|
|
.probe = power_probe,
|
2010-04-13 17:13:02 -06:00
|
|
|
.driver = {
|
|
|
|
.name = "power",
|
|
|
|
.of_match_table = power_match,
|
2007-10-11 00:27:34 -06:00
|
|
|
},
|
2006-06-23 02:44:10 -06:00
|
|
|
};
|
|
|
|
|
2016-11-23 08:06:05 -07:00
|
|
|
builtin_platform_driver(power_driver);
|