[PATCH v2 1/9] of: Add NVIDIA Tegra XUSB mailbox binding

[Andrew Bresticker]

Add device-tree bindings for the Tegra XUSB mailbox which will be used
for communication between the Tegra xHCI controller's firmware and the
host processor.

Signed-off-by: Andrew Bresticker <abrestic at chromium.org>
---
Changes from v1:
 - Updated to use common mailbox bindings.
---
 .../bindings/mailbox/nvidia,tegra124-xusb-mbox.txt | 30 ++++++++++++++++++++++
 include/dt-bindings/mailbox/tegra-xusb-mailbox.h   |  7 +++++
 2 files changed, 37 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mailbox/nvidia,tegra124-xusb-mbox.txt
 create mode 100644 include/dt-bindings/mailbox/tegra-xusb-mailbox.h

diff --git a/Documentation/devicetree/bindings/mailbox/nvidia,tegra124-xusb-mbox.txt b/Documentation/devicetree/bindings/mailbox/nvidia,tegra124-xusb-mbox.txt
new file mode 100644
index 0000000..c46219b
--- /dev/null
+++ b/Documentation/devicetree/bindings/mailbox/nvidia,tegra124-xusb-mbox.txt
@@ -0,0 +1,30 @@
+NVIDIA Tegra XUSB mailbox
+=========================
+
+The Tegra XUSB mailbox is used by the Tegra xHCI controller's firmware to
+communicate requests to the host and PHY drivers.
+
+Required properties:
+--------------------
+ - compatible: Should be "nvidia,tegra124-xusb-mbox".
+ - reg: Address and length of the XUSB FPCI registers.
+ - interrupts: XUSB mailbox interrupt.
+ - #mbox-cells: Should be 1.  The specifier is the index of the mailbox to
+   reference.  See <dt-bindings/mailbox/tegra-xusb-mailbox.h> for the list
+   of valid values.
+
+Example:
+--------
+	mbox: mailbox at 0,70098000 {
+		compatible = "nvidia,tegra124-xusb-mbox";
+		reg = <0x0 0x70098000 0x0 0x1000>;
+		interrupts = <GIC_SPI 40 IRQ_TYPE_LEVEL_HIGH>;
+
+		#mbox-cells = <1>;
+	};
+
+	usb at 0,70090000 {
+		...
+		mboxes = <&mbox TEGRA_XUSB_MBOX_CHAN_HOST>;
+		...
+	};
diff --git a/include/dt-bindings/mailbox/tegra-xusb-mailbox.h b/include/dt-bindings/mailbox/tegra-xusb-mailbox.h
new file mode 100644
index 0000000..59de6b0
--- /dev/null
+++ b/include/dt-bindings/mailbox/tegra-xusb-mailbox.h
@@ -0,0 +1,7 @@
+#ifndef _DT_BINDINGS_TEGRA_XUSB_MAILBOX_H
+#define _DT_BINDINGS_TEGRA_XUSB_MAILBOX_H
+
+#define TEGRA_XUSB_MBOX_CHAN_HOST	0
+#define TEGRA_XUSB_MBOX_CHAN_PHY	1
+
+#endif /* _DT_BINDINGS_TEGRA_XUSB_MAILBOX_H */
-- 
2.1.0.rc2.206.gedb03e5