X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2Fiomap.c;h=72c42687ba1095e1357e81a0aa259275dd5cc618;hb=9e3866b54867c401da8d9a665d228cf0977ab5be;hp=a57d262a5ed9b574a27445b8f72b6d6030a85c3b;hpb=b7405e16435f710edfae6ba32bef4ca20d3de145;p=linux-2.6-omap-h63xx.git

diff --git a/lib/iomap.c b/lib/iomap.c
index a57d262a5ed..72c42687ba1 100644
--- a/lib/iomap.c
+++ b/lib/iomap.c
@@ -40,7 +40,7 @@ static void bad_io_access(unsigned long port, const char *access)
 	static int count = 10;
 	if (count) {
 		count--;
-		printk(KERN_ERR "Bad IO access at port %lx (%s)\n", port, access);
+		printk(KERN_ERR "Bad IO access at port %#lx (%s)\n", port, access);
 		WARN_ON(1);
 	}
 }
@@ -240,7 +240,20 @@ void ioport_unmap(void __iomem *addr)
 EXPORT_SYMBOL(ioport_map);
 EXPORT_SYMBOL(ioport_unmap);
 
-/* Create a virtual mapping cookie for a PCI BAR (memory or IO) */
+/**
+ * pci_iomap - create a virtual mapping cookie for a PCI BAR
+ * @dev: PCI device that owns the BAR
+ * @bar: BAR number
+ * @maxlen: length of the memory to map
+ *
+ * Using this function you will get a __iomem address to your device BAR.
+ * You can access it using ioread*() and iowrite*(). These functions hide
+ * the details if this is a MMIO or PIO address space and will just do what
+ * you expect from them in the correct way.
+ *
+ * @maxlen specifies the maximum length to map. If you want to get access to
+ * the complete BAR without checking for its length first, pass %0 here.
+ * */
 void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
 {
 	unsigned long start = pci_resource_start(dev, bar);