dt-bindings: clock: add QCOM SM6375 display clock

Add device tree bindings for display clock controller for
Qualcomm Technology Inc's SM6375 SoC.
Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221115155808.10899-1-konrad.dybcio@linaro.org

Documentation/devicetree/bindings/clock/qcom,sm6375-dispcc.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/qcom,sm6375-dispcc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm Display Clock & Reset Controller on SM6375
+
+maintainers:
+  - Konrad Dybcio <konrad.dybcio@linaro.org>
+
+description: |
+  Qualcomm display clock control module provides the clocks, resets and power
+  domains on SM6375.
+
+  See also:: include/dt-bindings/clock/qcom,dispcc-sm6375.h
+
+allOf:
+  - $ref: qcom,gcc.yaml#
+
+properties:
+  compatible:
+    const: qcom,sm6375-dispcc
+
+  clocks:
+    items:
+      - description: Board XO source
+      - description: GPLL0 source from GCC
+      - description: Byte clock from DSI PHY
+      - description: Pixel clock from DSI PHY
+
+required:
+  - compatible
+  - clocks
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/qcom,sm6375-gcc.h>
+    #include <dt-bindings/clock/qcom,rpmh.h>
+
+    clock-controller@5f00000 {
+      compatible = "qcom,sm6375-dispcc";
+      reg = <0x05f00000 0x20000>;
+      clocks = <&rpmhcc RPMH_CXO_CLK>,
+               <&gcc GCC_DISP_GPLL0_CLK_SRC>,
+               <&dsi_phy 0>,
+               <&dsi_phy 1>;
+      #clock-cells = <1>;
+      #reset-cells = <1>;
+      #power-domain-cells = <1>;
+    };
+...

include/dt-bindings/clock/qcom,sm6375-dispcc.h

+/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
+/*
+ * Copyright (c) 2021, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2022, Linaro Limited
+ */
+
+#ifndef _DT_BINDINGS_CLK_QCOM_DISP_CC_SM6375_H
+#define _DT_BINDINGS_CLK_QCOM_DISP_CC_SM6375_H
+
+/* Clocks */
+#define DISP_CC_PLL0					0
+#define DISP_CC_MDSS_AHB_CLK				1
+#define DISP_CC_MDSS_AHB_CLK_SRC			2
+#define DISP_CC_MDSS_BYTE0_CLK				3
+#define DISP_CC_MDSS_BYTE0_CLK_SRC			4
+#define DISP_CC_MDSS_BYTE0_DIV_CLK_SRC			5
+#define DISP_CC_MDSS_BYTE0_INTF_CLK			6
+#define DISP_CC_MDSS_ESC0_CLK				7
+#define DISP_CC_MDSS_ESC0_CLK_SRC			8
+#define DISP_CC_MDSS_MDP_CLK				9
+#define DISP_CC_MDSS_MDP_CLK_SRC			10
+#define DISP_CC_MDSS_MDP_LUT_CLK			11
+#define DISP_CC_MDSS_NON_GDSC_AHB_CLK			12
+#define DISP_CC_MDSS_PCLK0_CLK				13
+#define DISP_CC_MDSS_PCLK0_CLK_SRC			14
+#define DISP_CC_MDSS_ROT_CLK				15
+#define DISP_CC_MDSS_ROT_CLK_SRC			16
+#define DISP_CC_MDSS_RSCC_AHB_CLK			17
+#define DISP_CC_MDSS_RSCC_VSYNC_CLK			18
+#define DISP_CC_MDSS_VSYNC_CLK				19
+#define DISP_CC_MDSS_VSYNC_CLK_SRC			20
+#define DISP_CC_SLEEP_CLK				21
+#define DISP_CC_XO_CLK					22
+
+/* Resets */
+#define DISP_CC_MDSS_CORE_BCR				0
+#define DISP_CC_MDSS_RSCC_BCR				1
+
+/* GDSCs */
+#define MDSS_GDSC					0
+
+#endif