Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmw

[linux-2.6-omap-h63xx.git] / drivers / char / rtc.c

diff --git a/drivers/char/rtc.c b/drivers/char/rtc.c
index 22cf7aa56cc470f6b04d464547c0cfc8a716efdf..0c66b802736a10540bca3ed9d7ef34f5b0208b4a 100644 (file)
--- a/drivers/char/rtc.c
+++ b/drivers/char/rtc.c
@@ -82,16 +82,13 @@
 #include <asm/uaccess.h>
 #include <asm/system.h>
 
-#if defined(__i386__)
+#ifdef CONFIG_X86
 #include <asm/hpet.h>
 #endif
 
-#ifdef __sparc__
+#ifdef CONFIG_SPARC32
 #include <linux/pci.h>
 #include <asm/ebus.h>
-#ifdef __sparc_v9__
-#include <asm/isa.h>
-#endif
 
 static unsigned long rtc_port;
 static int rtc_irq = PCI_IRQ_NONE;
@@ -921,6 +918,31 @@ static const struct file_operations rtc_proc_fops = {
 };
 #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
@@ -930,13 +952,9 @@ static int __init rtc_init(void)
        unsigned int year, ctrl;
        char *guess = NULL;
 #endif
-#ifdef __sparc__
+#ifdef CONFIG_SPARC32
        struct linux_ebus *ebus;
        struct linux_ebus_device *edev;
-#ifdef __sparc_v9__
-       struct sparc_isa_bridge *isa_br;
-       struct sparc_isa_device *isa_dev;
-#endif
 #else
        void *r;
 #ifdef RTC_IRQ
@@ -944,7 +962,7 @@ static int __init rtc_init(void)
 #endif
 #endif
 
-#ifdef __sparc__
+#ifdef CONFIG_SPARC32
        for_each_ebus(ebus) {
                for_each_ebusdev(edev, ebus) {
                        if(strcmp(edev->prom_node->name, "rtc") == 0) {
@@ -954,17 +972,6 @@ static int __init rtc_init(void)
                        }
                }
        }
-#ifdef __sparc_v9__
-       for_each_isa(isa_br) {
-               for_each_isadev(isa_dev, isa_br) {
-                       if (strcmp(isa_dev->prom_node->name, "rtc") == 0) {
-                               rtc_port = isa_dev->resource.start;
-                               rtc_irq = isa_dev->irq;
-                               goto found;
-                       }
-               }
-       }
-#endif
        rtc_has_irq = 0;
        printk(KERN_ERR "rtc_init: no PC rtc found\n");
        return -EIO;
@@ -986,10 +993,17 @@ found:
        }
 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;
@@ -1010,24 +1024,21 @@ no_irq:
                /* 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();
 
 #endif
 
-#endif /* __sparc__ vs. others */
+#endif /* CONFIG_SPARC32 vs. others */
 
        if (misc_register(&rtc_dev)) {
 #ifdef RTC_IRQ
                free_irq(RTC_IRQ, NULL);
                rtc_has_irq = 0;
 #endif
-               release_region(RTC_PORT(0), RTC_IO_EXTENT);
+               rtc_release_region();
                return -ENODEV;
        }
 
@@ -1105,19 +1116,16 @@ static void __exit rtc_exit (void)
        remove_proc_entry ("driver/rtc", NULL);
        misc_deregister(&rtc_dev);
 
-#ifdef __sparc__
+#ifdef CONFIG_SPARC32
        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);
 #endif
-#endif /* __sparc__ */
+#endif /* CONFIG_SPARC32 */
 }
 
 module_init(rtc_init);