};
#endif
+static resource_size_t rtc_size;
+
+static struct resource * __init rtc_request_region(resource_size_t size)
+{
+ struct resource *r;
+
+ if (RTC_IOMAPPED)
+ r = request_region(RTC_PORT(0), size, "rtc");
+ else
+ r = request_mem_region(RTC_PORT(0), size, "rtc");
+
+ if (r)
+ rtc_size = size;
+
+ return r;
+}
+
+static void rtc_release_region(void)
+{
+ if (RTC_IOMAPPED)
+ release_region(RTC_PORT(0), rtc_size);
+ else
+ release_mem_region(RTC_PORT(0), rtc_size);
+}
+
static int __init rtc_init(void)
{
#ifdef CONFIG_PROC_FS
}
no_irq:
#else
- if (RTC_IOMAPPED)
- r = request_region(RTC_PORT(0), RTC_IO_EXTENT, "rtc");
- else
- r = request_mem_region(RTC_PORT(0), RTC_IO_EXTENT, "rtc");
+ r = rtc_request_region(RTC_IO_EXTENT);
+
+ /*
+ * If we've already requested a smaller range (for example, because
+ * PNPBIOS or ACPI told us how the device is configured), the request
+ * above might fail because it's too big.
+ *
+ * If so, request just the range we actually use.
+ */
+ if (!r)
+ r = rtc_request_region(RTC_IO_EXTENT_USED);
if (!r) {
#ifdef RTC_IRQ
rtc_has_irq = 0;
/* Yeah right, seeing as irq 8 doesn't even hit the bus. */
rtc_has_irq = 0;
printk(KERN_ERR "rtc: IRQ %d is not free.\n", RTC_IRQ);
- if (RTC_IOMAPPED)
- release_region(RTC_PORT(0), RTC_IO_EXTENT);
- else
- release_mem_region(RTC_PORT(0), RTC_IO_EXTENT);
+ rtc_release_region();
return -EIO;
}
hpet_rtc_timer_init();
free_irq(RTC_IRQ, NULL);
rtc_has_irq = 0;
#endif
- release_region(RTC_PORT(0), RTC_IO_EXTENT);
+ rtc_release_region();
return -ENODEV;
}
if (rtc_has_irq)
free_irq (rtc_irq, &rtc_port);
#else
- if (RTC_IOMAPPED)
- release_region(RTC_PORT(0), RTC_IO_EXTENT);
- else
- release_mem_region(RTC_PORT(0), RTC_IO_EXTENT);
+ rtc_release_region();
#ifdef RTC_IRQ
if (rtc_has_irq)
free_irq (RTC_IRQ, NULL);