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authorLinus Torvalds <torvalds@linux-foundation.org>2016-12-13 23:11:01 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-12-13 23:11:01 +0300
commitb78b499a67c3f77aeb6cd0b54724bc38b141255d (patch)
tree8ebdb5303bb1552577182d9fe4086910b8648d22 /drivers/of
parent098c30557a9a19827240aaadc137e4668157dc6b (diff)
parent190cc65e912de7e8f7ebddcecfbf55a610281a8c (diff)
downloadlinux-b78b499a67c3f77aeb6cd0b54724bc38b141255d.tar.xz
Merge tag 'char-misc-4.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver updates from Greg KH: "Here's the big char/misc driver patches for 4.10-rc1. Lots of tiny changes over lots of "minor" driver subsystems, the largest being some new FPGA drivers. Other than that, a few other new drivers, but no new driver subsystems added for this kernel cycle, a nice change. All of these have been in linux-next with no reported issues" * tag 'char-misc-4.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (107 commits) uio-hv-generic: store physical addresses instead of virtual Tools: hv: kvp: configurable external scripts path uio-hv-generic: new userspace i/o driver for VMBus vmbus: add support for dynamic device id's hv: change clockevents unbind tactics hv: acquire vmbus_connection.channel_mutex in vmbus_free_channels() hyperv: Fix spelling of HV_UNKOWN mei: bus: enable non-blocking RX mei: fix the back to back interrupt handling mei: synchronize irq before initiating a reset. VME: Remove shutdown entry from vme_driver auxdisplay: ht16k33: select framebuffer helper modules MAINTAINERS: add git url for fpga fpga: Clarify how write_init works streaming modes fpga zynq: Fix incorrect ISR state on bootup fpga zynq: Remove priv->dev fpga zynq: Add missing \n to messages fpga: Add COMPILE_TEST to all drivers uio: pruss: add clk_disable() char/pcmcia: add some error checking in scr24x_read() ...
Diffstat (limited to 'drivers/of')
-rw-r--r--drivers/of/overlay.c47
1 files changed, 46 insertions, 1 deletions
diff --git a/drivers/of/overlay.c b/drivers/of/overlay.c
index 318dbb51e7a2..0d4cda7050e0 100644
--- a/drivers/of/overlay.c
+++ b/drivers/of/overlay.c
@@ -58,6 +58,41 @@ struct of_overlay {
static int of_overlay_apply_one(struct of_overlay *ov,
struct device_node *target, const struct device_node *overlay);
+static BLOCKING_NOTIFIER_HEAD(of_overlay_chain);
+
+int of_overlay_notifier_register(struct notifier_block *nb)
+{
+ return blocking_notifier_chain_register(&of_overlay_chain, nb);
+}
+EXPORT_SYMBOL_GPL(of_overlay_notifier_register);
+
+int of_overlay_notifier_unregister(struct notifier_block *nb)
+{
+ return blocking_notifier_chain_unregister(&of_overlay_chain, nb);
+}
+EXPORT_SYMBOL_GPL(of_overlay_notifier_unregister);
+
+static int of_overlay_notify(struct of_overlay *ov,
+ enum of_overlay_notify_action action)
+{
+ struct of_overlay_notify_data nd;
+ int i, ret;
+
+ for (i = 0; i < ov->count; i++) {
+ struct of_overlay_info *ovinfo = &ov->ovinfo_tab[i];
+
+ nd.target = ovinfo->target;
+ nd.overlay = ovinfo->overlay;
+
+ ret = blocking_notifier_call_chain(&of_overlay_chain,
+ action, &nd);
+ if (ret)
+ return notifier_to_errno(ret);
+ }
+
+ return 0;
+}
+
static int of_overlay_apply_single_property(struct of_overlay *ov,
struct device_node *target, struct property *prop)
{
@@ -368,6 +403,13 @@ int of_overlay_create(struct device_node *tree)
goto err_free_idr;
}
+ err = of_overlay_notify(ov, OF_OVERLAY_PRE_APPLY);
+ if (err < 0) {
+ pr_err("%s: Pre-apply notifier failed (err=%d)\n",
+ __func__, err);
+ goto err_free_idr;
+ }
+
/* apply the overlay */
err = of_overlay_apply(ov);
if (err)
@@ -382,6 +424,8 @@ int of_overlay_create(struct device_node *tree)
/* add to the tail of the overlay list */
list_add_tail(&ov->node, &ov_list);
+ of_overlay_notify(ov, OF_OVERLAY_POST_APPLY);
+
mutex_unlock(&of_mutex);
return id;
@@ -498,9 +542,10 @@ int of_overlay_destroy(int id)
goto out;
}
-
+ of_overlay_notify(ov, OF_OVERLAY_PRE_REMOVE);
list_del(&ov->node);
__of_changeset_revert(&ov->cset);
+ of_overlay_notify(ov, OF_OVERLAY_POST_REMOVE);
of_free_overlay_info(ov);
idr_remove(&ov_idr, id);
of_changeset_destroy(&ov->cset);