mirror of
https://github.com/torvalds/linux.git
synced 2024-11-29 23:51:37 +00:00
ead1c2bded
In preparation to remove the node name pointer from struct device_node,
convert printf users to use the %pOFn format specifier.
This was originally applied for 4.19, but reverted. The problematic
changes to prom_{32,64}.c have been dropped.
Cc: "David S. Miller" <davem@davemloft.net>
Cc: sparclinux@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
72 lines
1.4 KiB
C
72 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/* power.c: Power management driver.
|
|
*
|
|
* Copyright (C) 1999, 2007, 2008 David S. Miller (davem@davemloft.net)
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/export.h>
|
|
#include <linux/init.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/reboot.h>
|
|
#include <linux/of_device.h>
|
|
|
|
#include <asm/prom.h>
|
|
#include <asm/io.h>
|
|
|
|
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 int 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 power_probe(struct platform_device *op)
|
|
{
|
|
struct resource *res = &op->resource[0];
|
|
unsigned int irq = op->archdata.irqs[0];
|
|
|
|
power_reg = of_ioremap(res, 0, 0x4, "power");
|
|
|
|
printk(KERN_INFO "%pOFn: Control reg at %llx\n",
|
|
op->dev.of_node, res->start);
|
|
|
|
if (has_button_interrupt(irq, op->dev.of_node)) {
|
|
if (request_irq(irq,
|
|
power_handler, 0, "power", NULL) < 0)
|
|
printk(KERN_ERR "power: Cannot setup IRQ handler.\n");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id power_match[] = {
|
|
{
|
|
.name = "power",
|
|
},
|
|
{},
|
|
};
|
|
|
|
static struct platform_driver power_driver = {
|
|
.probe = power_probe,
|
|
.driver = {
|
|
.name = "power",
|
|
.of_match_table = power_match,
|
|
},
|
|
};
|
|
|
|
builtin_platform_driver(power_driver);
|