dt-bindings: firmware: Document cznic,turris-mox-rwtm binding

This adds device tree binding documentation for the driver communicating
with the rWTM firmware on Turris Mox.

Link: https://lore.kernel.org/r/20190822014318.19478-2-marek.behun@nic.cz
Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

diff --git a/Documentation/devicetree/bindings/firmware/cznic,turris-mox-rwtm.txt b/Documentation/devicetree/bindings/firmware/cznic,turris-mox-rwtm.txt
new file mode 100644 (file)
index 0000000..338169d
--- /dev/null
+++ b/Documentation/devicetree/bindings/firmware/cznic,turris-mox-rwtm.txt
@@ -0,0 +1,19 @@
+Turris Mox rWTM firmware driver
+
+Required properties:
+ - compatible          : Should be "cznic,turris-mox-rwtm"
+ - mboxes              : Must contain a reference to associated mailbox
+
+This device tree node should be used on Turris Mox, or potentially another A3700
+compatible device running the Mox's rWTM firmware in the secure processor (for
+example it is possible to flash this firmware into EspressoBin).
+
+Example:
+
+       firmware {
+               turris-mox-rwtm {
+                       compatible = "cznic,turris-mox-rwtm";
+                       mboxes = <&rwtm 0>;
+                       status = "okay";
+               };
+       };

diff --git a/MAINTAINERS b/MAINTAINERS
index bd95faf18f409afe0d31f9e17a2755d16d8f233d..1cf01240385a392e3b1c6689d3eac7c395a25d3f 100644 (file)
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1633,6 +1633,7 @@ S:        Maintained
 F:     Documentation/ABI/testing/debugfs-moxtet
 F:     Documentation/ABI/testing/sysfs-bus-moxtet-devices
 F:     Documentation/devicetree/bindings/bus/moxtet.txt
+F:     Documentation/devicetree/bindings/firmware/cznic,turris-mox-rwtm.txt
 F:     Documentation/devicetree/bindings/gpio/gpio-moxtet.txt
 F:     include/linux/moxtet.h
 F:     drivers/bus/moxtet.c