[PATCH 2/6] dt-bindings: serdev: ngsm: Add binding for serdev-ngsm

[Tony Lindgren <tony@atomide.com>]

Add a binding document for a generic serdev-ngsm driver that can be
used to bring up TS 27.010 line discipline with Linux n_gsm support
on a serial port.

As the Motorola Mapphone modems require some custom handling, they
are handled with a separate compatible.

Let's also add vendor string for ETSI as we're using a ETSI 3GPP
TS 27.010 standard.

Signed-off-by: Tony Lindgren <tony@atomide.com>
---
 .../bindings/serdev/serdev-ngsm.yaml          | 64 +++++++++++++++++++
 .../devicetree/bindings/vendor-prefixes.yaml  |  2 +
 2 files changed, 66 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/serdev/serdev-ngsm.yaml

diff --git a/Documentation/devicetree/bindings/serdev/serdev-ngsm.yaml b/Documentation/devicetree/bindings/serdev/serdev-ngsm.yaml
new file mode 100644
--- /dev/null
+++ b/Documentation/devicetree/bindings/serdev/serdev-ngsm.yaml
@@ -0,0 +1,64 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/serdev/serdev-ngsm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Generic serdev-ngsm TS 27.010 driver
+
+maintainers:
+  - Tony Lindgren <tony@atomide.com>
+
+properties:
+  compatible:
+    enum:
+      - etsi,3gpp-ts27010-adaption1
+      - motorola,mapphone-mdm6600-serial
+
+  ttymask:
+    $ref: /schemas/types.yaml#/definitions/uint64
+    description: Mask of the TS 27.010 channel TTY interfaces to start (64 bit)
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: motorola,mapphone-mdm6600-serial
+    then:
+      properties:
+        phys:
+          $ref: /schemas/types.yaml#/definitions/phandle-array
+          description: USB PHY needed for shared GPIO PM wake-up pins
+          maxItems: 1
+
+        phy-names:
+          description: Name of the USB PHY
+          const: usb
+
+      required:
+        - phys
+        - phy-names
+
+required:
+  - compatible
+  - ttymask
+  - "#address-cells"
+  - "#size-cells"
+
+examples:
+  - |
+    modem {
+      compatible = "motorola,mapphone-mdm6600-serial";
+      ttymask = <0 0x00001fee>;
+      phys = <&fsusb1_phy>;
+      phy-names = "usb";
+      #address-cells = <1>;
+      #size-cells = <0>;
+    };
diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
--- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
+++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
@@ -323,6 +323,8 @@ patternProperties:
     description: Espressif Systems Co. Ltd.
   "^est,.*":
     description: ESTeem Wireless Modems
+  "^etsi,.*":
+    description: ETSI
   "^ettus,.*":
     description: NI Ettus Research
   "^eukrea,.*":
-- 
2.26.2