[PATCH v2 03/15] dt-bindings: mfd: Add starfive,jh7110-hdmi-subsystem

[Michal Wilczynski]

Add the dt-binding for the StarFive JH7110 HDMI subsystem.

The JH7110 HDMI IP is a monolithic block containing both the digital
controller and analog PHY in a single register space. This binding
defines the parent device, which holds the shared register map and
populates its two children: the PHY and the controller. This is
necessary to resolve a circular clock dependency between the HDMI block
and the VOUT clock generator.

Signed-off-by: Michal Wilczynski <m.wilczynski@xxxxxxxxxxx>
---
 .../mfd/starfive,jh7110-hdmi-subsystem.yaml        | 116 +++++++++++++++++++++
 1 file changed, 116 insertions(+)

diff --git a/Documentation/devicetree/bindings/mfd/starfive,jh7110-hdmi-subsystem.yaml b/Documentation/devicetree/bindings/mfd/starfive,jh7110-hdmi-subsystem.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..01f079160ab8c13c6fa4ce3abaac6607021b3792
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/starfive,jh7110-hdmi-subsystem.yaml
@@ -0,0 +1,116 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/starfive,jh7110-hdmi-subsystem.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: StarFive JH7110 HDMI subsystem
+
+maintainers:
+  - Michal Wilczynski <m.wilczynski@xxxxxxxxxxx>
+
+description:
+  The StarFive JH7110 HDMI block is a monolithic IP containing both
+  the digital controller logic and the analog PHY logic in a single
+  register space.
+
+properties:
+  compatible:
+    const: starfive,jh7110-hdmi-subsystem
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+    description:
+      NoC display bus clock, which gates access to the whole vout
+      register region.
+
+  resets:
+    maxItems: 1
+    description:
+      NoC display bus reset, which gates access to the whole vout
+      register region.
+
+  power-domains:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - resets
+  - power-domains
+
+patternProperties:
+  "^phy(@[0-9a-f]+)?$":
+    $ref: /schemas/phy/starfive,jh7110-inno-hdmi-phy.yaml#
+  "^controller(@[0-9a-f]+)?$":
+    $ref: /schemas/display/bridge/starfive,jh7110-inno-hdmi-controller.yaml#
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/starfive,jh7110-crg.h>
+    #include <dt-bindings/power/starfive,jh7110-pmu.h>
+    #include <dt-bindings/reset/starfive,jh7110-crg.h>
+
+    soc {
+        #address-cells = <1>;
+        #size-cells = <1>;
+
+        hdmi@29590000 {
+            compatible = "starfive,jh7110-hdmi-subsystem";
+            reg = <0x29590000 0x4000>;
+            clocks = <&syscrg JH7110_SYSCLK_NOC_BUS_DISP_AXI>;
+            power-domains = <&pwrc JH7110_PD_VOUT>;
+            resets = <&syscrg JH7110_SYSRST_NOC_BUS_DISP_AXI>;
+
+            controller {
+                compatible = "starfive,jh7110-inno-hdmi-controller";
+                clocks = <&voutcrg JH7110_VOUTCLK_HDMI_TX_SYS>,
+                         <&voutcrg JH7110_VOUTCLK_HDMI_TX_MCLK>,
+                         <&voutcrg JH7110_VOUTCLK_HDMI_TX_BCLK>,
+                         <&hdmi_phy>;
+                clock-names = "sys", "mclk", "bclk", "pclk";
+                interrupts = <99>;
+                phys = <&hdmi_phy>;
+                phy-names = "hdmi-phy";
+                resets = <&voutcrg JH7110_VOUTRST_HDMI_TX_HDMI>;
+                reset-names = "hdmi_tx";
+
+                ports {
+                    #address-cells = <1>;
+                    #size-cells = <0>;
+
+                    port@0 {
+                        reg = <0>;
+
+                        endpoint {
+                            remote-endpoint = <&dpu_out_dpi0>;
+                        };
+                    };
+
+                    port@1 {
+                        reg = <1>;
+
+                        endpoint {
+                            remote-endpoint = <&hdmi_con_in>;
+                        };
+                    };
+                };
+            };
+
+            hdmi_phy: phy {
+                compatible = "starfive,jh7110-inno-hdmi-phy";
+                #clock-cells = <0>;
+                clock-output-names = "hdmi_pclk";
+                clocks = <&xin24m>;
+                clock-names = "refoclk";
+                #phy-cells = <0>;
+            };
+        };
+    };
+...

-- 
2.34.1