dt-bindings: mfd: Add i.MX8qm/qxp Control and Status Registers module binding

This patch adds bindings for i.MX8qm/qxp Control and Status Registers module.
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Liu Ying <victor.liu@nxp.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220611141421.718743-14-victor.liu@nxp.com

Documentation/devicetree/bindings/mfd/fsl,imx8qxp-csr.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/fsl,imx8qxp-csr.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale i.MX8qm/qxp Control and Status Registers Module Bindings
+
+maintainers:
+  - Liu Ying <victor.liu@nxp.com>
+
+description: |
+  As a system controller, the Freescale i.MX8qm/qxp Control and Status
+  Registers(CSR) module represents a set of miscellaneous registers of a
+  specific subsystem.  It may provide control and/or status report interfaces
+  to a mix of standalone hardware devices within that subsystem.  One typical
+  use-case is for some other nodes to acquire a reference to the syscon node
+  by phandle, and the other typical use-case is that the operating system
+  should consider all subnodes of the CSR module as separate child devices.
+
+properties:
+  $nodename:
+    pattern: "^syscon@[0-9a-f]+$"
+
+  compatible:
+    items:
+      - enum:
+          - fsl,imx8qxp-mipi-lvds-csr
+          - fsl,imx8qm-lvds-csr
+      - const: syscon
+      - const: simple-mfd
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    const: ipg
+
+patternProperties:
+  "^(ldb|phy|pxl2dpi)$":
+    type: object
+    description: The possible child devices of the CSR module.
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: fsl,imx8qxp-mipi-lvds-csr
+    then:
+      required:
+        - pxl2dpi
+        - ldb
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: fsl,imx8qm-lvds-csr
+    then:
+      required:
+        - phy
+        - ldb
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/imx8-lpcg.h>
+    #include <dt-bindings/firmware/imx/rsrc.h>
+    mipi_lvds_0_csr: syscon@56221000 {
+        compatible = "fsl,imx8qxp-mipi-lvds-csr", "syscon", "simple-mfd";
+        reg = <0x56221000 0x1000>;
+        clocks = <&mipi_lvds_0_di_mipi_lvds_regs_lpcg IMX_LPCG_CLK_4>;
+        clock-names = "ipg";
+
+        mipi_lvds_0_pxl2dpi: pxl2dpi {
+            compatible = "fsl,imx8qxp-pxl2dpi";
+            fsl,sc-resource = <IMX_SC_R_MIPI_0>;
+            power-domains = <&pd IMX_SC_R_MIPI_0>;
+
+            ports {
+                #address-cells = <1>;
+                #size-cells = <0>;
+
+                port@0 {
+                    #address-cells = <1>;
+                    #size-cells = <0>;
+                    reg = <0>;
+
+                    mipi_lvds_0_pxl2dpi_dc0_pixel_link0: endpoint@0 {
+                        reg = <0>;
+                        remote-endpoint = <&dc0_pixel_link0_mipi_lvds_0_pxl2dpi>;
+                    };
+
+                    mipi_lvds_0_pxl2dpi_dc0_pixel_link1: endpoint@1 {
+                        reg = <1>;
+                        remote-endpoint = <&dc0_pixel_link1_mipi_lvds_0_pxl2dpi>;
+                    };
+                };
+
+                port@1 {
+                    #address-cells = <1>;
+                    #size-cells = <0>;
+                    reg = <1>;
+
+                    mipi_lvds_0_pxl2dpi_mipi_lvds_0_ldb_ch0: endpoint@0 {
+                        reg = <0>;
+                        remote-endpoint = <&mipi_lvds_0_ldb_ch0_mipi_lvds_0_pxl2dpi>;
+                    };
+
+                    mipi_lvds_0_pxl2dpi_mipi_lvds_0_ldb_ch1: endpoint@1 {
+                        reg = <1>;
+                        remote-endpoint = <&mipi_lvds_0_ldb_ch1_mipi_lvds_0_pxl2dpi>;
+                    };
+                };
+            };
+        };
+
+        mipi_lvds_0_ldb: ldb {
+            #address-cells = <1>;
+            #size-cells = <0>;
+            compatible = "fsl,imx8qxp-ldb";
+            clocks = <&clk IMX_SC_R_LVDS_0 IMX_SC_PM_CLK_MISC2>,
+                     <&clk IMX_SC_R_LVDS_0 IMX_SC_PM_CLK_BYPASS>;
+            clock-names = "pixel", "bypass";
+            power-domains = <&pd IMX_SC_R_LVDS_0>;
+
+            channel@0 {
+                #address-cells = <1>;
+                #size-cells = <0>;
+                reg = <0>;
+                phys = <&mipi_lvds_0_phy>;
+                phy-names = "lvds_phy";
+
+                port@0 {
+                    reg = <0>;
+
+                    mipi_lvds_0_ldb_ch0_mipi_lvds_0_pxl2dpi: endpoint {
+                        remote-endpoint = <&mipi_lvds_0_pxl2dpi_mipi_lvds_0_ldb_ch0>;
+                    };
+                };
+
+                port@1 {
+                    reg = <1>;
+
+                    /* ... */
+                };
+            };
+
+            channel@1 {
+                #address-cells = <1>;
+                #size-cells = <0>;
+                reg = <1>;
+                phys = <&mipi_lvds_0_phy>;
+                phy-names = "lvds_phy";
+
+                port@0 {
+                    reg = <0>;
+
+                    mipi_lvds_0_ldb_ch1_mipi_lvds_0_pxl2dpi: endpoint {
+                        remote-endpoint = <&mipi_lvds_0_pxl2dpi_mipi_lvds_0_ldb_ch1>;
+                    };
+                };
+
+                port@1 {
+                    reg = <1>;
+
+                    /* ... */
+                };
+            };
+        };
+    };
+
+    mipi_lvds_0_phy: phy@56228300 {
+        compatible = "fsl,imx8qxp-mipi-dphy";
+        reg = <0x56228300 0x100>;
+        clocks = <&clk IMX_SC_R_LVDS_0 IMX_SC_PM_CLK_PHY>;
+        clock-names = "phy_ref";
+        #phy-cells = <0>;
+        fsl,syscon = <&mipi_lvds_0_csr>;
+        power-domains = <&pd IMX_SC_R_MIPI_0>;
+    };