linux-kernel - [PATCH v5 1/6] dt-bindings: ti, sci: Add lpm region and firmware-name

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Date:   Mon, 28 Nov 2022 16:05:17 +0200
From:   Georgi Vlaev <g-vlaev@...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>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        Vibhore Vardhan <vibhore@...com>,
        Vignesh Raghavendra <vigneshr@...com>,
        Roger Quadros <rogerq@...nel.org>,
        Georgi Vlaev <g-vlaev@...com>, Rob Herring <robh@...nel.org>
Subject: [PATCH v5 1/6] dt-bindings: ti, sci: Add lpm region and firmware-name

From: Dave Gerlach <d-gerlach@...com>

Add documentation for the lpm region which tells the ti-sci driver where
to load the FS Stub low power mode firmware and also the firmware-name
which tells the driver which binary to load. Both of these are optional
for normal system operation but required to enabled suspend-to-mem usage
of Deep Sleep state.

Signed-off-by: Dave Gerlach <d-gerlach@...com>
Signed-off-by: Vibhore Vardhan <vibhore@...com>
Signed-off-by: Georgi Vlaev <g-vlaev@...com>
Reviewed-by: Rob Herring <robh@...nel.org>
---
 .../bindings/arm/keystone/ti,sci.yaml         | 21 +++++++++++++++----
 1 file changed, 17 insertions(+), 4 deletions(-)

diff --git a/Documentation/devicetree/bindings/arm/keystone/ti,sci.yaml b/Documentation/devicetree/bindings/arm/keystone/ti,sci.yaml
index 34f5f877d444..4c5213de24bc 100644
--- a/Documentation/devicetree/bindings/arm/keystone/ti,sci.yaml
+++ b/Documentation/devicetree/bindings/arm/keystone/ti,sci.yaml
@@ -42,12 +42,19 @@ properties:
           - const: ti,am654-sci
 
   reg-names:
-    description: |
-      Specifies the debug messages memory mapped region that is optionally
-      made available from TI-SCI controller.
-    const: debug_messages
+    items:
+      - const: debug_messages
+      - const: lpm
+    minItems: 1
 
   reg:
+    items:
+      - description: |
+          Specifies the debug messages memory mapped region that is optionally
+          made available from TI-SCI controller.
+      - description: |
+          Specifies the lpm memory mapped region where the FS Stub low power
+          firmware is to be loaded.
     minItems: 1
 
   mbox-names:
@@ -83,6 +90,12 @@ properties:
     type: object
     $ref: /schemas/reset/ti,sci-reset.yaml#
 
+  firmware-name:
+    description: |
+      Name of binary of FS Stub low power firmware located on the
+      firmware search path.
+    $ref: /schemas/types.yaml#/definitions/string
+
 required:
   - compatible
   - mbox-names
-- 
2.30.2