linux-kernel - [PATCH 01/12] dt-bindings: power: reset: Document ti,sci-reboot compatible

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Message-ID: <20240131221957.213717-2-afd@ti.com>
Date: Wed, 31 Jan 2024 16:19:46 -0600
From: Andrew Davis <afd@...com>
To: Nishanth Menon <nm@...com>, Tero Kristo <kristo@...nel.org>,
        Santosh
 Shilimkar <ssantosh@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof
 Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley
	<conor+dt@...nel.org>,
        Sebastian Reichel <sre@...nel.org>,
        Vignesh
 Raghavendra <vigneshr@...com>
CC: <linux-arm-kernel@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-pm@...r.kernel.org>,
        Andrew Davis
	<afd@...com>
Subject: [PATCH 01/12] dt-bindings: power: reset: Document ti,sci-reboot compatible

This calls into the system firmware using TI-SCI to reboot the system.
Used as a fallback when PSCI is unable or not available to reboot
the system.

Signed-off-by: Andrew Davis <afd@...com>
---
 .../bindings/power/reset/ti,sci-reboot.yaml   | 33 +++++++++++++++++++
 MAINTAINERS                                   |  1 +
 2 files changed, 34 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/power/reset/ti,sci-reboot.yaml

diff --git a/Documentation/devicetree/bindings/power/reset/ti,sci-reboot.yaml b/Documentation/devicetree/bindings/power/reset/ti,sci-reboot.yaml
new file mode 100644
index 0000000000000..aa628be33d122
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/reset/ti,sci-reboot.yaml
@@ -0,0 +1,33 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/power/reset/ti,sci-reboot.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TI-SCI reboot controller
+
+maintainers:
+  - Andrew Davis <afd@...com>
+
+description: |
+  Some TI SoCs contain a system controller (like the Power Management Micro
+  Controller (PMMC) on Keystone 66AK2G SoC) that are responsible for controlling
+  the state of the various hardware modules present on the SoC. Communication
+  between the host processor running an OS and the system controller happens
+  through a protocol called TI System Control Interface (TI-SCI protocol).
+
+  This reboot controller node uses the TI SCI protocol to perform a device reboot.
+
+  Must be a child node of the associated TI-SCI system controller node.
+
+properties:
+  compatible:
+    const: ti,sci-reboot
+
+additionalProperties: false
+
+examples:
+  - |
+    k3_reboot: reboot-controller {
+        compatible = "ti,sci-reboot";
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index 8999497011a26..45983bb174fe4 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -21751,6 +21751,7 @@ F:	Documentation/devicetree/bindings/arm/keystone/ti,sci.yaml
 F:	Documentation/devicetree/bindings/clock/ti,sci-clk.yaml
 F:	Documentation/devicetree/bindings/interrupt-controller/ti,sci-inta.yaml
 F:	Documentation/devicetree/bindings/interrupt-controller/ti,sci-intr.yaml
+F:	Documentation/devicetree/bindings/power/reset/ti,sci-reboot.yaml
 F:	Documentation/devicetree/bindings/reset/ti,sci-reset.yaml
 F:	Documentation/devicetree/bindings/soc/ti/sci-pm-domain.yaml
 F:	drivers/clk/keystone/sci-clk.c
-- 
2.39.2