[PATCH v2 1/2] dt-bindings: soc: tegra: Document Nvidia Tegra modem pwrseq

[Svyatoslav Ryhel <clamor95@gmail.com>]

Document the Tegra modem pwseq used by various devices based on the Nvidia
Tegra SoC, describing its usage. The power sequence provides interaction
between the modem and SoC-specific interface configurations.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
---
 .../soc/tegra/nvidia,tegra-modem-pwrseq.yaml  | 49 +++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/soc/tegra/nvidia,tegra-modem-pwrseq.yaml

diff --git a/Documentation/devicetree/bindings/soc/tegra/nvidia,tegra-modem-pwrseq.yaml b/Documentation/devicetree/bindings/soc/tegra/nvidia,tegra-modem-pwrseq.yaml
new file mode 100644
index 000000000000..3770fd6dc2cf
--- /dev/null
+++ b/Documentation/devicetree/bindings/soc/tegra/nvidia,tegra-modem-pwrseq.yaml
@@ -0,0 +1,49 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/soc/tegra/nvidia,tegra-modem-pwrseq.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Nvidia Tegra modem power sequence
+
+description:
+  A configuration sequence used in Tegra SoCs to provide proper interaction
+  between the application processor and the modem, as well as control over
+  one of the SoC's USB lines for the modem.
+
+maintainers:
+  - Svyatoslav Ryhel <clamor95@gmail.com>
+
+properties:
+  compatible:
+    const: nvidia,tegra-modem-pwrseq
+
+  enable-gpios:
+    description: GPIO connected to the modem EINT1 pin
+    maxItems: 1
+
+  nvidia,usb-bus:
+    description:
+      Contains phandle pointing to the Host's USB controller
+    $ref: /schemas/types.yaml#/definitions/phandle
+
+  power-supply: true
+
+required:
+  - compatible
+  - nvidia,usb-bus
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    pwrseq-modem {
+        compatible = "nvidia,tegra-modem-pwrseq";
+
+        enable-gpios = <&gpio 165 GPIO_ACTIVE_HIGH>;
+        power-supply = <&vdd_3v3_vbat>;
+
+        nvidia,usb-bus = <&usb2>;
+    };
-- 
2.51.0