forked from luck/tmp_suning_uos_patched
066bcaca51
Many of the core sparc kernel files are not modules, but just including module.h for exporting symbols. Now these files can use the lighter footprint export.h for this role. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
77 lines
1.5 KiB
C
77 lines
1.5 KiB
C
/* power.c: Power management driver.
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*
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* Copyright (C) 1999, 2007, 2008 David S. Miller (davem@davemloft.net)
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*/
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#include <linux/kernel.h>
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#include <linux/export.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/reboot.h>
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#include <linux/of_device.h>
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#include <asm/prom.h>
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#include <asm/io.h>
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static void __iomem *power_reg;
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static irqreturn_t power_handler(int irq, void *dev_id)
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{
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orderly_poweroff(true);
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/* FIXME: Check registers for status... */
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return IRQ_HANDLED;
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}
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static int __devinit has_button_interrupt(unsigned int irq, struct device_node *dp)
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{
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if (irq == 0xffffffff)
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return 0;
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if (!of_find_property(dp, "button", NULL))
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return 0;
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return 1;
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}
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static int __devinit power_probe(struct platform_device *op)
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{
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struct resource *res = &op->resource[0];
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unsigned int irq = op->archdata.irqs[0];
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power_reg = of_ioremap(res, 0, 0x4, "power");
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printk(KERN_INFO "%s: Control reg at %llx\n",
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op->dev.of_node->name, res->start);
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if (has_button_interrupt(irq, op->dev.of_node)) {
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if (request_irq(irq,
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power_handler, 0, "power", NULL) < 0)
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printk(KERN_ERR "power: Cannot setup IRQ handler.\n");
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}
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return 0;
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}
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static const struct of_device_id power_match[] = {
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{
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.name = "power",
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},
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{},
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};
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static struct platform_driver power_driver = {
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.probe = power_probe,
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.driver = {
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.name = "power",
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.owner = THIS_MODULE,
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.of_match_table = power_match,
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},
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};
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static int __init power_init(void)
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{
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return platform_driver_register(&power_driver);
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}
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device_initcall(power_init);
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