[PATCH] PA-RISC: parisc_device diet

 - Remove parent/child/sibling links from parisc_device in favour of the
   ones in the embedded struct device.
 - Display irq and device IDs through sysfs
 - Translate a PA-RISC firmware path into a struct device (Thibaut Varene)
Signed-off-by: Matthew Wilcox <willy@parisc-linux.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/parisc/kernel/inventory.c

@@ -518,7 +518,7 @@ add_system_map_addresses(struct parisc_device *dev, int num_addrs,
 }
 
 /**
- * do_system_map_inventory - Retrieve firmware devices via SYSTEM_MAP.
+ * system_map_inventory - Retrieve firmware devices via SYSTEM_MAP.
  *
  * This function attempts to retrieve and register all the devices firmware
  * knows about via the SYSTEM_MAP PDC call.
@@ -528,13 +528,15 @@ static void __init system_map_inventory(void)
 	int i;
 	long status = PDC_OK;
     
-	for (i = 0; status != PDC_BAD_PROC && status != PDC_NE_MOD; i++) {
+	for (i = 0; i < 256; i++) {
 		struct parisc_device *dev;
 		struct pdc_system_map_mod_info module_result;
 		struct pdc_module_path module_path;
 
 		status = pdc_system_map_find_mods(&module_result,
 				&module_path, i);
+		if ((status == PDC_BAD_PROC) || (status == PDC_NE_MOD))
+			break;
 		if (status != PDC_OK)
 			continue;
 
@@ -584,10 +586,10 @@ void __init do_memory_inventory(void)
 
 void __init do_device_inventory(void)
 {
-	extern void parisc_generic_device_register(void);
-
 	printk(KERN_INFO "Searching for devices...\n");
 
+	init_parisc_bus();
+
 	switch (pdc_type) {
 
 	case PDC_TYPE_PAT:
@@ -605,7 +607,6 @@ void __init do_device_inventory(void)
 	default:
 		panic("Unknown PDC type!\n");
 	}
-	parisc_generic_device_register();
 	printk(KERN_INFO "Found devices:\n");
 	print_parisc_devices();
 }

drivers/parisc/ccio-dma.c

@@ -1198,9 +1198,10 @@ void * ccio_get_iommu(const struct parisc_device *dev)
  * to/from certain pages.  To avoid this happening, we mark these pages
  * as `used', and ensure that nothing will try to allocate from them.
  */
-void ccio_cujo20_fixup(struct parisc_device *dev, u32 iovp)
+void ccio_cujo20_fixup(struct parisc_device *cujo, u32 iovp)
 {
 	unsigned int idx;
+	struct parisc_device *dev = parisc_parent(cujo);
 	struct ioc *ioc = ccio_get_iommu(dev);
 	u8 *res_ptr;
 
@@ -1556,9 +1557,12 @@ static int ccio_probe(struct parisc_device *dev)
 		create_proc_read_entry(MODULE_NAME"-bitmap", S_IRWXU,
 				       proc_runway_root, ccio_resource_map, NULL);
 	}
+
+	ioc_count++;
+
 	parisc_vmerge_boundary = IOVP_SIZE;
 	parisc_vmerge_max_size = BITS_PER_LONG * IOVP_SIZE;
-	ioc_count++;
+	parisc_has_iommu();
 	return 0;
 }
 

drivers/parisc/dino.c

@@ -951,9 +951,9 @@ dino_driver_callback(struct parisc_device *dev)
 #ifdef CONFIG_IOMMU_CCIO
 		printk(KERN_WARNING "Enabling Cujo 2.0 bug workaround\n");
 		if (dev->hpa == (unsigned long)CUJO_RAVEN_ADDR) {
-			ccio_cujo20_fixup(dev->parent, CUJO_RAVEN_BADPAGE);
+			ccio_cujo20_fixup(dev, CUJO_RAVEN_BADPAGE);
 		} else if (dev->hpa == (unsigned long)CUJO_FIREHAWK_ADDR) {
-			ccio_cujo20_fixup(dev->parent, CUJO_FIREHAWK_BADPAGE);
+			ccio_cujo20_fixup(dev, CUJO_FIREHAWK_BADPAGE);
 		} else {
 			printk("Don't recognise Cujo at address 0x%lx, not enabling workaround\n", dev->hpa);
 		}

drivers/serial/8250_gsc.c

@@ -40,7 +40,7 @@ serial_init_chip(struct parisc_device *dev)
 		 * what we have here is a missing parent device, so tell
 		 * the user what they're missing.
 		 */
-		if (dev->parent->id.hw_type != HPHW_IOA) {
+		if (parisc_parent(dev)->id.hw_type != HPHW_IOA) {
 			printk(KERN_INFO "Serial: device 0x%lx not configured.\n"
 				"Enable support for Wax, Lasi, Asp or Dino.\n", dev->hpa);
 		}
@@ -99,13 +99,13 @@ static struct parisc_device_id lasi_tbl[] = {
 MODULE_DEVICE_TABLE(parisc, serial_tbl);
 
 static struct parisc_driver lasi_driver = {
-	.name		= "Lasi RS232",
+	.name		= "serial_1",
 	.id_table	= lasi_tbl,
 	.probe		= serial_init_chip,
 };
 
 static struct parisc_driver serial_driver = {
-	.name		= "Serial RS232",
+	.name		= "serial",
 	.id_table	= serial_tbl,
 	.probe		= serial_init_chip,
 };

include/asm-parisc/hardware.h

@@ -115,14 +115,13 @@ extern int register_parisc_driver(struct parisc_driver *driver);
 extern int count_parisc_driver(struct parisc_driver *driver);
 extern int unregister_parisc_driver(struct parisc_driver *driver);
 extern void walk_central_bus(void);
-extern void fixup_child_irqs(struct parisc_device *parent, int irqbase,
-		int (*choose)(struct parisc_device *parent));
-extern void print_subdevices(struct parisc_device *dev);
 extern const struct parisc_device *find_pa_parent_type(const struct parisc_device *, int);
 extern void print_parisc_devices(void);
 extern char *print_pa_hwpath(struct parisc_device *dev, char *path);
 extern char *print_pci_hwpath(struct pci_dev *dev, char *path);
 extern void get_pci_node_path(struct pci_dev *dev, struct hardware_path *path);
+extern void init_parisc_bus(void);
+extern struct device *hwpath_to_device(struct hardware_path *modpath);
 
 
 /* inventory.c: */

include/asm-parisc/parisc-device.h

@@ -3,11 +3,7 @@
 struct parisc_device {
 	unsigned long   hpa;		/* Hard Physical Address */
 	struct parisc_device_id id;
-	struct parisc_device *parent;
-	struct parisc_device *sibling;
-	struct parisc_device *child;
 	struct parisc_driver *driver;	/* Driver for this device */
-	void		*sysdata;	/* Driver instance private data */
 	char		name[80];	/* The hardware description */
 	int		irq;
 
@@ -40,5 +36,18 @@ struct parisc_driver {
 
 #define to_parisc_device(d)	container_of(d, struct parisc_device, dev)
 #define to_parisc_driver(d)	container_of(d, struct parisc_driver, drv)
+#define parisc_parent(d)	to_parisc_device(d->dev.parent)
+
+static inline void
+parisc_set_drvdata(struct parisc_device *d, void *p)
+{
+	dev_set_drvdata(&d->dev, p);
+}
+
+static inline void *
+parisc_get_drvdata(struct parisc_device *d)
+{
+	return dev_get_drvdata(&d->dev);
+}
 
 extern struct bus_type parisc_bus_type;