1 files changed, 75 insertions, 0 deletions

diff --git a/arch/sparc/kernel/power.c b/arch/sparc/kernel/power.c
new file mode 100644
index 000000000000..076cad7f9757
--- /dev/null
+++ b/arch/sparc/kernel/power.c
@@ -0,0 +1,75 @@
+/* power.c: Power management driver.
+ *
+ * Copyright (C) 1999, 2007, 2008 David S. Miller (davem@davemloft.net)
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.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 __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);
+
+        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 __initdata power_match[] = {
+        {
+                .name = "power",
+        },
+        {},
+};
+
+static struct of_platform_driver power_driver = {
+        .match_table    = power_match,
+        .probe          = power_probe,
+        .driver         = {
+                .name   = "power",
+        },
+};
+
+static int __init power_init(void)
+{
+        return of_register_driver(&power_driver, &of_platform_bus_type);
+}
+
+device_initcall(power_init);