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

Pull mailbox updates from Jassi Brar:

 - Minor improvement : avoid requiring unnecessary startup/shutdown
   callback that many drivers seem to not need

 - New controller driver for Qualcomm's APCS IPC

* 'mailbox-for-next' of git://git.linaro.org/landing-teams/working/fujitsu/integration:
  mailbox: Introduce Qualcomm APCS IPC driver
  dt-bindings: mailbox: Introduce Qualcomm APCS global binding
  mailbox: Make startup and shutdown ops optional

1 files changed, 46 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/mailbox/qcom,apcs-kpss-global.txt b/Documentation/devicetree/bindings/mailbox/qcom,apcs-kpss-global.txt
new file mode 100644
index 000000000000..fb961c310f44
--- /dev/null
+++ b/Documentation/devicetree/bindings/mailbox/qcom,apcs-kpss-global.txt
@@ -0,0 +1,46 @@
+Binding for the Qualcomm APCS global block
+==========================================
+
+This binding describes the APCS "global" block found in various Qualcomm
+platforms.
+
+- compatible:
+        Usage: required
+        Value type: <string>
+        Definition: must be one of:
+                    "qcom,msm8916-apcs-kpss-global",
+                    "qcom,msm8996-apcs-hmss-global"
+
+- reg:
+        Usage: required
+        Value type: <prop-encoded-array>
+        Definition: must specify the base address and size of the global block
+
+- #mbox-cells:
+        Usage: required
+        Value type: <u32>
+        Definition: as described in mailbox.txt, must be 1
+
+
+= EXAMPLE
+The following example describes the APCS HMSS found in MSM8996 and part of the
+GLINK RPM referencing the "rpm_hlos" doorbell therein.
+
+        apcs_glb: mailbox@9820000 {
+                compatible = "qcom,msm8996-apcs-hmss-global";
+                reg = <0x9820000 0x1000>;
+
+                #mbox-cells = <1>;
+        };
+
+        rpm-glink {
+                compatible = "qcom,glink-rpm";
+
+                interrupts = <GIC_SPI 168 IRQ_TYPE_EDGE_RISING>;
+
+                qcom,rpm-msg-ram = <&rpm_msg_ram>;
+
+                mboxes = <&apcs_glb 0>;
+                mbox-names = "rpm_hlos";
+        };
+