powerpc+of: Add of node/property notification chain for adds and removes

This patch moves the notification chain for updates to the device tree
from the powerpc/pseries code to the base OF code. This makes this
functionality available to all architectures.

Additionally the notification chain is updated to allow notifications
for property add/remove/update. To make this work a pointer to a new
struct (of_prop_reconfig) is passed to the routines in the notification chain.
The of_prop_reconfig property contains a pointer to the node containing the
property and a pointer to the property itself. In the case of property
updates, the property pointer refers to the new property.

Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

2 files changed, 8 insertions, 13 deletions

diff --git a/drivers/crypto/nx/nx-842.c b/drivers/crypto/nx/nx-842.c
index 0ce625738677..6c4c000671c5 100644
--- a/drivers/crypto/nx/nx-842.c
+++ b/drivers/crypto/nx/nx-842.c
@@ -28,7 +28,6 @@
 #include <linux/slab.h>
 
 #include <asm/page.h>
-#include <asm/pSeries_reconfig.h>
 #include <asm/vio.h>
 
 #include "nx_csbcpb.h" /* struct nx_csbcpb */
@@ -1014,26 +1013,23 @@ error_out:
  *      NOTIFY_BAD encoded with error number on failure, use
  *              notifier_to_errno() to decode this value
  */
-static int nx842_OF_notifier(struct notifier_block *np,
-                                        unsigned long action,
-                                        void *update)
+static int nx842_OF_notifier(struct notifier_block *np, unsigned long action,
+                             void *update)
 {
-        struct pSeries_reconfig_prop_update *upd;
+        struct of_prop_reconfig *upd = update;
         struct nx842_devdata *local_devdata;
         struct device_node *node = NULL;
 
-        upd = (struct pSeries_reconfig_prop_update *)update;
-
         rcu_read_lock();
         local_devdata = rcu_dereference(devdata);
         if (local_devdata)
                 node = local_devdata->dev->of_node;
 
         if (local_devdata &&
-                        action == PSERIES_UPDATE_PROPERTY &&
-                        !strcmp(upd->node->name, node->name)) {
+                        action == OF_RECONFIG_UPDATE_PROPERTY &&
+                        !strcmp(upd->dn->name, node->name)) {
                 rcu_read_unlock();
-                nx842_OF_upd(upd->property);
+                nx842_OF_upd(upd->prop);
         } else
                 rcu_read_unlock();
 
@@ -1182,7 +1178,7 @@ static int __init nx842_probe(struct vio_dev *viodev,
         synchronize_rcu();
         kfree(old_devdata);
 
-        pSeries_reconfig_notifier_register(&nx842_of_nb);
+        of_reconfig_notifier_register(&nx842_of_nb);
 
         ret = nx842_OF_upd(NULL);
         if (ret && ret != -ENODEV) {
@@ -1228,7 +1224,7 @@ static int __exit nx842_remove(struct vio_dev *viodev)
         spin_lock_irqsave(&devdata_mutex, flags);
         old_devdata = rcu_dereference_check(devdata,
                         lockdep_is_held(&devdata_mutex));
-        pSeries_reconfig_notifier_unregister(&nx842_of_nb);
+        of_reconfig_notifier_unregister(&nx842_of_nb);
         rcu_assign_pointer(devdata, NULL);
         spin_unlock_irqrestore(&devdata_mutex, flags);
         synchronize_rcu();
diff --git a/drivers/crypto/nx/nx.c b/drivers/crypto/nx/nx.c
index 638110efae9b..f7a8a16aa7d3 100644
--- a/drivers/crypto/nx/nx.c
+++ b/drivers/crypto/nx/nx.c
@@ -33,7 +33,6 @@
 #include <linux/scatterlist.h>
 #include <linux/device.h>
 #include <linux/of.h>
-#include <asm/pSeries_reconfig.h>
 #include <asm/hvcall.h>
 #include <asm/vio.h>