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Date: Thu, 15 Feb 2024 19:18:52 +0530
From: Md Sadre Alam <quic_mdalam@...cinc.com>
To: andersson@...nel.org, konrad.dybcio@...aro.org, broonie@...nel.org,
        robh@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        conor+dt@...nel.org, miquel.raynal@...tlin.com, richard@....at,
        vigneshr@...com, manivannan.sadhasivam@...aro.org,
        linux-arm-msm@...r.kernel.org, linux-spi@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mtd@...ts.infradead.org
Cc: quic_srichara@...cinc.com, quic_varada@...cinc.com,
        quic_mdalam@...cinc.com
Subject: [PATCH 1/5] spi: dt-bindings: add binding doc for spi-qpic-snand

Add device-tree binding documentation for QCOM QPIC-SNAND-NAND Flash
Interface.

Co-developed-by: Sricharan Ramabadhran <quic_srichara@...cinc.com>
Signed-off-by: Sricharan Ramabadhran <quic_srichara@...cinc.com>
Co-developed-by: Varadarajan Narayanan <quic_varada@...cinc.com>
Signed-off-by: Varadarajan Narayanan <quic_varada@...cinc.com>
Signed-off-by: Md Sadre Alam <quic_mdalam@...cinc.com>
---
 .../bindings/spi/qcom,spi-qpic-snand.yaml     | 82 +++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/spi/qcom,spi-qpic-snand.yaml

diff --git a/Documentation/devicetree/bindings/spi/qcom,spi-qpic-snand.yaml b/Documentation/devicetree/bindings/spi/qcom,spi-qpic-snand.yaml
new file mode 100644
index 000000000000..fa7484ce1319
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/qcom,spi-qpic-snand.yaml
@@ -0,0 +1,82 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/spi/qcom,spi-qpic-snand.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm QPIC NAND controller
+
+maintainers:
+  - Md sadre Alam <quic_mdalam@...cinc.com>
+
+properties:
+  compatible:
+    enum:
+      - qcom,ipq9574-snand
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    minItems: 2
+    maxItems: 3
+
+  clock-names:
+    minItems: 2
+    maxItems: 3
+
+allOf:
+  - $ref: /schemas/spi/spi-controller.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - qcom,ipq9574-snand
+
+    then:
+      properties:
+        dmas:
+          items:
+            - description: tx DMA channel
+            - description: rx DMA channel
+            - description: cmd DMA channel
+
+        dma-names:
+          items:
+            - const: tx
+            - const: rx
+            - const: cmd
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/qcom,ipq9574-gcc.h>
+    qpic_nand: spi@...0000 {
+        compatible = "qcom,ipq9574-snand";
+        reg = <0x1ac00000 0x800>;
+
+        clocks = <&gcc GCC_QPIC_CLK>,
+                 <&gcc GCC_QPIC_AHB_CLK>,
+                 <&gcc GCC_QPIC_IO_MACRO_CLK>;
+        clock-names = "core", "aon", "iom";
+
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        flash@0 {
+            compatible = "spi-nand";
+            reg = <0>;
+            #address-cells = <1>;
+            #size-cells = <1>;
+            nand-ecc-engine = <&qpic_nand>;
+            nand-ecc-strength = <4>;
+            nand-ecc-step-size = <512>;
+            };
+        };
-- 
2.34.1


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