dt-bindings: arm: amlogic: Move 'amlogic, meson-gx-ao-secure' binding to its own file

It is best practice to have 1 binding per file, so board level bindings
should be separate for various misc SoC bindings.

Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Carlo Caione <carlo@caione.org>
Cc: Kevin Hilman <khilman@baylibre.com>
Cc: devicetree@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-amlogic@lists.infradead.org
Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Acked-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

1 files changed, 28 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/arm/amlogic/amlogic,meson-gx-ao-secure.txt b/Documentation/devicetree/bindings/arm/amlogic/amlogic,meson-gx-ao-secure.txt
new file mode 100644
index 000000000000..c67d9f48fb91
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/amlogic/amlogic,meson-gx-ao-secure.txt
@@ -0,0 +1,28 @@
+Amlogic Meson Firmware registers Interface
+------------------------------------------
+
+The Meson SoCs have a register bank with status and data shared with the
+secure firmware.
+
+Required properties:
+ - compatible: For Meson GX SoCs, must be "amlogic,meson-gx-ao-secure", "syscon"
+
+Properties should indentify components of this register interface :
+
+Meson GX SoC Information
+------------------------
+A firmware register encodes the SoC type, package and revision information on
+the Meson GX SoCs.
+If present, the following property should be added :
+
+Optional properties:
+  - amlogic,has-chip-id: If present, the interface gives the current SoC version.
+
+Example
+-------
+
+ao-secure@140 {
+	compatible = "amlogic,meson-gx-ao-secure", "syscon";
+	reg = <0x0 0x140 0x0 0x140>;
+	amlogic,has-chip-id;
+};