linux-kernel - [PATCH 1/5] dt-bindings: nvmem: add google,gs101-otp

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Message-Id: <20251031-gs101-otp-v1-1-2a54f6c4e7b6@linaro.org>
Date: Fri, 31 Oct 2025 12:45:09 +0000
From: Tudor Ambarus <tudor.ambarus@...aro.org>
To: Srinivas Kandagatla <srini@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Krzysztof Kozlowski <krzk@...nel.org>, 
 Alim Akhtar <alim.akhtar@...sung.com>, 
 Peter Griffin <peter.griffin@...aro.org>, 
 André Draszik <andre.draszik@...aro.org>
Cc: semen.protsenko@...aro.org, willmcvicker@...gle.com, 
 kernel-team@...roid.com, linux-kernel@...r.kernel.org, 
 linux-samsung-soc@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, 
 Tudor Ambarus <tudor.ambarus@...aro.org>
Subject: [PATCH 1/5] dt-bindings: nvmem: add google,gs101-otp

Add binding for the OTP controller found on Google GS101.

Signed-off-by: Tudor Ambarus <tudor.ambarus@...aro.org>
---
 .../bindings/nvmem/google,gs101-otp.yaml           | 68 ++++++++++++++++++++++
 1 file changed, 68 insertions(+)

diff --git a/Documentation/devicetree/bindings/nvmem/google,gs101-otp.yaml b/Documentation/devicetree/bindings/nvmem/google,gs101-otp.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..2144911297beb89337b0389b30fe6609db4156ea
--- /dev/null
+++ b/Documentation/devicetree/bindings/nvmem/google,gs101-otp.yaml
@@ -0,0 +1,68 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/nvmem/google,gs101-otp.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Google GS101 OTP Controller
+
+maintainers:
+  - Tudor Ambarus <tudor.ambarus@...aro.org>
+
+description: |
+  OTP controller drives a NVMEM memory where system or user specific data
+  can be stored. The OTP controller register space if of interest as well
+  because it contains dedicated registers where it stores the Product ID
+  and the Chip ID (apart other things like TMU or ASV info).
+
+allOf:
+  - $ref: nvmem.yaml#
+  - $ref: nvmem-deprecated-cells.yaml
+
+properties:
+  compatible:
+    items:
+      - const: google,gs101-otp
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    const: pclk
+
+  reg:
+    maxItems: 1
+
+  power-domains:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - "#address-cells"
+  - "#size-cells"
+  - clock-names
+  - clocks
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/google,gs101.h>
+
+    otp: efuse@...00000 {
+        compatible = "google,gs101-otp";
+        reg = <0x10000000 0xf084>;
+        #address-cells = <1>;
+        #size-cells = <1>;
+        clocks = <&cmu_misc CLK_GOUT_MISC_OTP_CON_TOP_PCLK>;
+        clock-names = "pclk";
+
+        product_id: product_id@0 {
+            reg = <0x0 0x4>;
+        };
+
+        chip_id: chip-id@4 {
+            reg = <0x4 0x10>;
+        };
+    };

-- 
2.51.1.930.gacf6e81ea2-goog