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From:   Kuldeep Singh <singh.kuldeep87k@gmail.com>
To:     Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzk+dt@kernel.org>,
        Andy Gross <agross@kernel.org>,
        Bjorn Andersson <bjorn.andersson@linaro.org>
Cc:     linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
        linux-i2c@vger.kernel.org, devicetree@vger.kernel.org
Subject: [PATCH 1/5] dt-bindings: i2c: Add Qualcomm Geni based QUP i2c bindings
Date:   Sat,  2 Apr 2022 10:42:02 +0530
Message-Id: <20220402051206.6115-2-singh.kuldeep87k@gmail.com>
In-Reply-To: <20220402051206.6115-1-singh.kuldeep87k@gmail.com>
References: <20220402051206.6115-1-singh.kuldeep87k@gmail.com>
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GENI(generic interface) based Qualcomm Universal Peripheral controller
can support multiple serial interfaces like spi,uart and i2c.

Unlike other i2c controllers, QUP i2c bindings are present in parent
schema. Move it out from parent to an individual binding and let parent
refer to child schema later on.

Please note, current schema isn't complete as it misses out few
properties and thus, add these missing properties along the process.

Signed-off-by: Kuldeep Singh <singh.kuldeep87k@gmail.com>
---
 .../bindings/i2c/qcom,i2c-geni-qcom.yaml      | 110 ++++++++++++++++++
 1 file changed, 110 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/i2c/qcom,i2c-geni-qcom.yaml

diff --git a/Documentation/devicetree/bindings/i2c/qcom,i2c-geni-qcom.yaml b/Documentation/devicetree/bindings/i2c/qcom,i2c-geni-qcom.yaml
new file mode 100644
index 000000000000..01a02e680ea3
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/qcom,i2c-geni-qcom.yaml
@@ -0,0 +1,110 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/i2c/qcom,i2c-geni-qcom.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Qualcomm Geni based QUP I2C Controller
+
+maintainers:
+  - Andy Gross <agross@kernel.org>
+  - Bjorn Andersson <bjorn.andersson@linaro.org>
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+properties:
+  compatible:
+    enum:
+      - qcom,geni-i2c
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    const: se
+
+  clock-frequency:
+    description: Desired I2C bus clock frequency in Hz
+    default: 100000
+
+  interconnects:
+    maxItems: 3
+
+  interconnect-names:
+    items:
+      - const: qup-core
+      - const: qup-config
+      - const: qup-memory
+
+  interrupts:
+    maxItems: 1
+
+  power-domains:
+    maxItems: 1
+
+  reg:
+    maxItems: 1
+
+  required-opps:
+    maxItems: 1
+
+  dmas:
+    maxItems: 2
+
+  dma-names:
+    items:
+      - const: tx
+      - const: rx
+
+  pinctrl-0: true
+  pinctrl-1: true
+
+  pinctrl-names:
+    minItems: 1
+    items:
+      - const: default
+      - const: sleep
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+required:
+  - compatible
+  - interrupts
+  - clocks
+  - clock-names
+  - reg
+  - "#address-cells"
+  - "#size-cells"
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/clock/qcom,gcc-sc7180.h>
+    #include <dt-bindings/interconnect/qcom,sc7180.h>
+    #include <dt-bindings/power/qcom-rpmpd.h>
+
+    i2c@88000 {
+        compatible = "qcom,geni-i2c";
+        reg = <0x00880000 0x4000>;
+        clock-names = "se";
+        clocks = <&gcc GCC_QUPV3_WRAP0_S0_CLK>;
+        pinctrl-names = "default";
+        pinctrl-0 = <&qup_i2c0_default>;
+        interrupts = <GIC_SPI 601 IRQ_TYPE_LEVEL_HIGH>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+        interconnects = <&qup_virt MASTER_QUP_CORE_0 0 &qup_virt SLAVE_QUP_CORE_0 0>,
+                        <&gem_noc MASTER_APPSS_PROC 0 &config_noc SLAVE_QUP_0 0>,
+                        <&aggre1_noc MASTER_QUP_0 0 &mc_virt SLAVE_EBI1 0>;
+        interconnect-names = "qup-core", "qup-config", "qup-memory";
+        power-domains = <&rpmhpd SC7180_CX>;
+        required-opps = <&rpmhpd_opp_low_svs>;
+    };
+...
-- 
2.25.1