linux-kernel - [RFC PATCH] dt-bindings: nvmem: Introduce nvmem efuse binding for TI K3 SoCs

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Message-ID: <20250916154809.545283-1-jm@ti.com>
Date: Tue, 16 Sep 2025 10:48:09 -0500
From: Judith Mendez <jm@...com>
To: Judith Mendez <jm@...com>, Srinivas Kandagatla <srini@...nel.org>,
        Rob
 Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor
 Dooley <conor+dt@...nel.org>
CC: <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Bryan
 Brattlof <bb@...com>, Andrew Davis <afd@...com>
Subject: [RFC PATCH] dt-bindings: nvmem: Introduce nvmem efuse binding for TI K3 SoCs

On K3 SoCs there are efuse registers scattered across the memory
map. In order to reference these efuse registers like gp-sw which
may store SW REV information or other general purpose information
for drivers to consume, treat them appropriately as efuse devices
with nvmem framework.

Signed-off-by: Judith Mendez <jm@...com>
---
This patch is not complete and is sent as an RFC to get some initial
thoughts on this implementation to solve [0].

[0] https://lore.kernel.org/linux-mmc/736f09e0-075a-48e0-9b32-6b8805a7ee2a@kernel.org
---
 .../devicetree/bindings/nvmem/ti,efuses.yaml  | 36 +++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/nvmem/ti,efuses.yaml

diff --git a/Documentation/devicetree/bindings/nvmem/ti,efuses.yaml b/Documentation/devicetree/bindings/nvmem/ti,efuses.yaml
new file mode 100644
index 0000000000000..fffca65cdbfe0
--- /dev/null
+++ b/Documentation/devicetree/bindings/nvmem/ti,efuses.yaml
@@ -0,0 +1,36 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/nvmem/ti,efuses.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TI SoC eFuse-based NVMEM
+
+maintainers:
+  - Judith Mendez <jm@...com>
+
+allOf:
+  - $ref: nvmem.yaml#
+  - $ref: nvmem-deprecated-cells.yaml#
+
+properties:
+  compatible:
+    - const: ti,am62p-efuse
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    efuse@...00230 {
+        compatible = "ti,am62p-efuse";
+        reg = <0x43000230 0x4>;
+    };
+
+...
-- 
2.51.0