[PATCH] driver model updates (4/5)

Patch 4: Add some default files for PCI devices.

This adds two files for PCI devices: 'irq' and 'resources'. They display
just those things and currently do nothing on write. These are the
examples for other subsystems to use for creating files ('Hey, look how
simple it is!')

drivers/pci/proc.c

@@ -371,6 +371,47 @@ static struct seq_operations proc_bus_pci_devices_op = {
 
 static struct proc_dir_entry *proc_bus_pci_dir;
 
+/* driverfs files */
+static ssize_t pci_show_irq(struct device * dev, char * buf, size_t count, loff_t off)
+{
+	struct pci_dev * pci_dev = list_entry(dev,struct pci_dev,dev);
+	return off ? 0 : sprintf(buf,"%u",pci_dev->irq);
+}
+
+static struct driver_file_entry pci_irq_entry = {
+	name:	"irq",
+	mode:	S_IRUGO,
+	show:	pci_show_irq,
+};
+
+static ssize_t pci_show_resources(struct device * dev, char * buf, size_t count, loff_t off)
+{
+	struct pci_dev * pci_dev = list_entry(dev,struct pci_dev,dev);
+	char * str = buf;
+	int i;
+
+	if (off && off < DEVICE_COUNT_RESOURCE) {
+		str += sprintf(str,LONG_FORMAT LONG_FORMAT LONG_FORMAT "\n",
+				       pci_resource_start(pci_dev,off),
+				       pci_resource_end(pci_dev,off),
+				       pci_resource_flags(pci_dev,off));
+	} else if (!off) {
+		for (i = 0; i < DEVICE_COUNT_RESOURCE && pci_resource_start(pci_dev,i); i++) {
+			str += sprintf(str,LONG_FORMAT LONG_FORMAT LONG_FORMAT "\n",
+				       pci_resource_start(pci_dev,i),
+				       pci_resource_end(pci_dev,i),
+				       pci_resource_flags(pci_dev,i));
+		}
+	}
+	return (str - buf);
+}
+
+static struct driver_file_entry pci_resource_entry = {
+	name:	"resources",
+	mode:	S_IRUGO,
+	show:	pci_show_resources,
+};
+
 int pci_proc_attach_device(struct pci_dev *dev)
 {
 	struct pci_bus *bus = dev->bus;
@@ -390,6 +431,9 @@ int pci_proc_attach_device(struct pci_dev *dev)
 	e->proc_fops = &proc_bus_pci_operations;
 	e->data = dev;
 	e->size = PCI_CFG_SPACE_SIZE;
+
+	device_create_file(&dev->dev,&pci_irq_entry);
+	device_create_file(&dev->dev,&pci_resource_entry);
 	return 0;
 }