Merge branch 'mailbox-for-next' of git://git.linaro.org/landing-teams/working/fujitsu/integration

Pull mailbox updates from Jassi Brar:

 - a TI specific quirk to get CPU control working via remote master.

 - a new mailbox driver for an ST platform.

 - a generic test driver to aid new driver development.  And a couple of
   fixes to make that really clean.

* 'mailbox-for-next' of git://git.linaro.org/landing-teams/working/fujitsu/integration:
  mailbox: mailbox-test: avoid reading iomem twice
  mailbox: Off by one in mbox_test_message_read()
  mailbox/omap: Add ti,mbox-send-noirq quirk to fix AM33xx CPU Idle
  mailbox: mailbox-test: Correctly repair Sparse warnings
  mailbox: Fix a couple of trivial static checker issues
  mailbox: Add generic mechanism for testing Mailbox Controllers
  mailbox: Add support for ST's Mailbox IP
  mailbox: dt: Supply bindings for ST's Mailbox IP
  PCC: fix dereference of ERR_PTR

Documentation/devicetree/bindings/mailbox/omap-mailbox.txt

@@ -75,6 +75,14 @@ data that represent the following:
     Cell #3 (usr_id)  - mailbox user id for identifying the interrupt line
                         associated with generating a tx/rx fifo interrupt.
 
+Optional Properties:
+--------------------
+- ti,mbox-send-noirq:   Quirk flag to allow the client user of this sub-mailbox
+                        to send messages without triggering a Tx ready interrupt,
+                        and to control the Tx ticker. Should be used only on
+                        sub-mailboxes used to communicate with WkupM3 remote
+                        processor on AM33xx/AM43xx SoCs.
+
 Mailbox Users:
 ==============
 A device needing to communicate with a target processor device should specify

Documentation/devicetree/bindings/mailbox/sti-mailbox.txt

@@ -0,0 +1,51 @@
+ST Microelectronics Mailbox Driver
+
+Each ST Mailbox IP currently consists of 4 instances of 32 channels.  Messages
+are passed between Application and Remote processors using shared memory.
+
+Controller
+----------
+
+Required properties:
+- compatible		: Should be "st,stih407-mailbox"
+- reg			: Offset and length of the device's register set
+- mbox-name		: Name of the mailbox
+- #mbox-cells:		: Must be 2
+			  <&phandle instance channel direction>
+			    phandle   : Label name of controller
+			    instance  : Instance number
+			    channel   : Channel number
+
+Optional properties
+- interrupts		: Contains the IRQ line for a Rx mailbox
+
+Example:
+
+mailbox0: mailbox@0  {
+	compatible	= "st,stih407-mailbox";
+	reg		= <0x08f00000 0x1000>;
+	interrupts	= <GIC_SPI 1 IRQ_TYPE_NONE>;
+	#mbox-cells	= <2>;
+	mbox-name	= "a9";
+};
+
+Client
+------
+
+Required properties:
+- compatible		: Many (See the client docs)
+- reg			: Shared (between Application and Remote) memory address
+- mboxes		: Standard property to specify a Mailbox (See ./mailbox.txt)
+			  Cells must match 'mbox-cells' (See Controller docs above)
+
+Optional properties
+- mbox-names		: Name given to channels seen in the 'mboxes' property.
+
+Example:
+
+mailbox_test {
+	compatible	= "mailbox_test";
+	reg		= <0x[shared_memory_address], [shared_memory_size]>;
+	mboxes		= <&mailbox2 0 1>, <&mailbox0 2 1>;
+	mbox-names	= "tx",	"rx";
+};