[PATCH v2 04/14] dt-bindings: misc: Add device specific bindings for RaspberryPi RP1

[Andrea della Porta <andrea.porta@xxxxxxxx>]

The RP1 is a MFD that exposes its peripherals through PCI BARs. This
schema is intended as minimal support for the clock generator and
gpio controller peripherals which are accessible through BAR1.

Signed-off-by: Andrea della Porta <andrea.porta@xxxxxxxx>
---
 .../devicetree/bindings/misc/pci1de4,1.yaml   | 110 ++++++++++++++++++
 MAINTAINERS                                   |   1 +
 2 files changed, 111 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/misc/pci1de4,1.yaml

diff --git a/Documentation/devicetree/bindings/misc/pci1de4,1.yaml b/Documentation/devicetree/bindings/misc/pci1de4,1.yaml
new file mode 100644
index 000000000000..3f099b16e672
--- /dev/null
+++ b/Documentation/devicetree/bindings/misc/pci1de4,1.yaml
@@ -0,0 +1,110 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/misc/pci1de4,1.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: RaspberryPi RP1 MFD PCI device
+
+maintainers:
+  - Andrea della Porta <andrea.porta@xxxxxxxx>
+
+description:
+  The RaspberryPi RP1 is a PCI multi function device containing
+  peripherals ranging from Ethernet to USB controller, I2C, SPI
+  and others.
+  The peripherals are accessed by addressing the PCI BAR1 region.
+
+allOf:
+  - $ref: /schemas/pci/pci-ep-bus.yaml
+
+properties:
+  compatible:
+    additionalItems: true
+    maxItems: 3
+    items:
+      - const: pci1de4,1
+
+patternProperties:
+  "^pci-ep-bus@[0-2]$":
+    $ref: '#/$defs/bar-bus'
+    description:
+      The bus on which the peripherals are attached, which is addressable
+      through the BAR.
+
+unevaluatedProperties: false
+
+$defs:
+  bar-bus:
+    $ref: /schemas/pci/pci-ep-bus.yaml#/$defs/pci-ep-bus
+    unevaluatedProperties: false
+
+    properties:
+      "#interrupt-cells":
+        const: 2
+        description:
+          Specifies respectively the interrupt number and flags as defined
+          in include/dt-bindings/interrupt-controller/irq.h.
+
+      interrupt-controller: true
+
+      interrupt-parent:
+        description:
+          Must be the phandle of this 'pci-ep-bus' node. It will trigger
+          PCI interrupts on behalf of peripheral generated interrupts.
+
+    patternProperties:
+      "^clocks(@[0-9a-f]+)?$":
+        type: object
+        $ref: /schemas/clock/raspberrypi,rp1-clocks.yaml
+
+      "^ethernet(@[0-9a-f]+)?$":
+        type: object
+        $ref: /schemas/net/cdns,macb.yaml
+
+      "^pinctrl(@[0-9a-f]+)?$":
+        type: object
+        $ref: /schemas/pinctrl/raspberrypi,rp1-gpio.yaml
+
+    required:
+      - interrupt-parent
+      - interrupt-controller
+
+examples:
+  - |
+    pci {
+        #address-cells = <3>;
+        #size-cells = <2>;
+
+        rp1@0,0 {
+            compatible = "pci1de4,1";
+            ranges = <0x01 0x00 0x00000000
+                      0x82010000 0x00 0x00
+                      0x00 0x400000>;
+            #address-cells = <3>;
+            #size-cells = <2>;
+
+            pci_ep_bus: pci-ep-bus@1 {
+                compatible = "simple-bus";
+                ranges = <0xc0 0x40000000
+                          0x01 0x00 0x00000000
+                          0x00 0x00400000>;
+                dma-ranges = <0x10 0x00000000
+                              0x43000000 0x10 0x00000000
+                              0x10 0x00000000>;
+                #address-cells = <2>;
+                #size-cells = <2>;
+                interrupt-controller;
+                interrupt-parent = <&pci_ep_bus>;
+                #interrupt-cells = <2>;
+
+                rp1_clocks: clocks@c040018000 {
+                    compatible = "raspberrypi,rp1-clocks";
+                    reg = <0xc0 0x40018000 0x0 0x10038>;
+                    #clock-cells = <1>;
+                    clocks = <&clk_rp1_xosc>;
+                    clock-names =  "rp1-xosc";
+                };
+            };
+        };
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index ccf123b805c8..2aea5a6166bd 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -19384,6 +19384,7 @@ RASPBERRY PI RP1 PCI DRIVER
 M:	Andrea della Porta <andrea.porta@xxxxxxxx>
 S:	Maintained
 F:	Documentation/devicetree/bindings/clock/raspberrypi,rp1-clocks.yaml
+F:	Documentation/devicetree/bindings/misc/pci1de4,1.yaml
 F:	Documentation/devicetree/bindings/pci/pci-ep-bus.yaml
 F:	Documentation/devicetree/bindings/pinctrl/raspberrypi,rp1-gpio.yaml
 F:	include/dt-bindings/clock/rp1.h
-- 
2.35.3