linux-kernel - [PATCH 1/3] dt-bindings: spmi: Add generic SPMI NVMEM

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Message-Id: <20250415-spmi-nvmem-v1-1-22067be253cf@gmail.com>
Date: Tue, 15 Apr 2025 23:52:34 +0200
From: Sasha Finkelstein via B4 Relay <devnull+fnkl.kernel.gmail.com@...nel.org>
To: Sven Peter <sven@...npeter.dev>, Janne Grunau <j@...nau.net>, 
 Alyssa Rosenzweig <alyssa@...enzweig.io>, Neal Gompa <neal@...pa.dev>, 
 Srinivas Kandagatla <srinivas.kandagatla@...aro.org>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: asahi@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Sasha Finkelstein <fnkl.kernel@...il.com>
Subject: [PATCH 1/3] dt-bindings: spmi: Add generic SPMI NVMEM

From: Sasha Finkelstein <fnkl.kernel@...il.com>

Add bindings for exposing SPMI registers as NVMEM cells

Signed-off-by: Sasha Finkelstein <fnkl.kernel@...il.com>
---
 .../devicetree/bindings/nvmem/spmi-nvmem.yaml      | 44 ++++++++++++++++++++++
 MAINTAINERS                                        |  1 +
 2 files changed, 45 insertions(+)

diff --git a/Documentation/devicetree/bindings/nvmem/spmi-nvmem.yaml b/Documentation/devicetree/bindings/nvmem/spmi-nvmem.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..0041babefc37ed4d82d7d6f68fc67d29eed53d9f
--- /dev/null
+++ b/Documentation/devicetree/bindings/nvmem/spmi-nvmem.yaml
@@ -0,0 +1,44 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/nvmem/spmi-nvmem.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Generic SPMI NVMEM
+
+description: Exports a series of SPMI registers as NVMEM cells
+
+maintainers:
+  - Sasha Finkelstein <fnkl.kernel@...il.com>
+
+allOf:
+  - $ref: nvmem.yaml#
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - apple,maverick-pmu
+          - apple,sera-pmu
+          - apple,stowe-pmu
+      - const: spmi-nvmem
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/spmi/spmi.h>
+
+    pmu@f {
+        compatible = "apple,maverick-pmu", "spmi-nvmem";
+        reg = <0xf SPMI_USID>;
+    };
+
+...
diff --git a/MAINTAINERS b/MAINTAINERS
index 96b82704950184bd71623ff41fc4df31e4c7fe87..e7b2d0df81b387ba5398957131971588dc7b89dc 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2277,6 +2277,7 @@ F:	Documentation/devicetree/bindings/mailbox/apple,mailbox.yaml
 F:	Documentation/devicetree/bindings/net/bluetooth/brcm,bcm4377-bluetooth.yaml
 F:	Documentation/devicetree/bindings/nvme/apple,nvme-ans.yaml
 F:	Documentation/devicetree/bindings/nvmem/apple,efuses.yaml
+F:	Documentation/devicetree/bindings/nvmem/spmi-nvmem.yaml
 F:	Documentation/devicetree/bindings/pci/apple,pcie.yaml
 F:	Documentation/devicetree/bindings/pinctrl/apple,pinctrl.yaml
 F:	Documentation/devicetree/bindings/power/apple*

-- 
2.49.0