linux-kernel - [PATCH v5 1/2] dt-bindings: nvmem: sec-qfprom: Add bindings for secure qfprom

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Message-ID: <20230724083849.8277-2-quic_kbajaj@quicinc.com>
Date:   Mon, 24 Jul 2023 14:08:48 +0530
From:   Komal Bajaj <quic_kbajaj@...cinc.com>
To:     <agross@...nel.org>, <andersson@...nel.org>,
        <konrad.dybcio@...aro.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
        <srinivas.kandagatla@...aro.org>
CC:     <linux-arm-msm@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        Komal Bajaj <quic_kbajaj@...cinc.com>
Subject: [PATCH v5 1/2] dt-bindings: nvmem: sec-qfprom: Add bindings for secure qfprom

This patch adds bindings for secure qfprom found in QCOM SOCs.
Secure QFPROM driver is based on simple nvmem framework.

Signed-off-by: Komal Bajaj <quic_kbajaj@...cinc.com>
---
 .../bindings/nvmem/qcom,sec-qfprom.yaml       | 58 +++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/nvmem/qcom,sec-qfprom.yaml

diff --git a/Documentation/devicetree/bindings/nvmem/qcom,sec-qfprom.yaml b/Documentation/devicetree/bindings/nvmem/qcom,sec-qfprom.yaml
new file mode 100644
index 000000000000..1425ced36fdf
--- /dev/null
+++ b/Documentation/devicetree/bindings/nvmem/qcom,sec-qfprom.yaml
@@ -0,0 +1,58 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/nvmem/qcom,sec-qfprom.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm Technologies Inc, Secure QFPROM Efuse
+
+maintainers:
+  - Komal Bajaj <quic_kbajaj@...cinc.com>
+
+description: |
+  For some of the Qualcomm SoC's, it is possible that
+  the qfprom region is protected from non-secure access.
+  In such situations, linux will have to use secure calls
+  to read the region.
+
+allOf:
+  - $ref: nvmem.yaml#
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - qcom,qdu1000-sec-qfprom
+      - const: qcom,sec-qfprom
+
+  reg:
+    items:
+      - description: The secure qfprom corrected region.
+
+required:
+  - compatible
+  - reg
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/qcom,gcc-sc7180.h>
+
+    soc {
+      #address-cells = <2>;
+      #size-cells = <2>;
+
+      efuse@...c8000 {
+        compatible = "qcom,qdu1000-sec-qfprom", "qcom,sec-qfprom";
+        reg = <0 0x221c8000 0 0x1000>;
+        #address-cells = <1>;
+        #size-cells = <1>;
+
+        multi_chan_ddr: multi-chan-ddr@12b {
+          reg = <0x12b 0x1>;
+          bits = <0 2>;
+        };
+      };
+    };
+
--
2.40.1