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 <abres...@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@0,70098000 {
+ compatible = "nvidia,tegra124-xusb-mbox";
+ reg = <0x0 0x70098000 0x0 0x1000>;
+ interrupts = <GIC_SPI 40 IRQ_TYPE_LEVEL_HIGH>;
+
+ #mbox-cells = <1>;
+ };
+
+ usb@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
--
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