[v4,04/10] dt-bindings: misc: Add device specific bindings for RaspberryPi RP1

Commit Message

Andrea della Porta Nov. 24, 2024, 10:51 a.m. UTC

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 <[e-mail]>
---
 .../devicetree/bindings/misc/pci1de4,1.yaml   | 74 +++++++++++++++++++
 MAINTAINERS                                   |  1 +
 2 files changed, 75 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/misc/pci1de4,1.yaml

Patch

diff --git a/Documentation/devicetree/bindings/misc/pci1de4,1.yaml b/Documentation/devicetree/bindings/misc/pci1de4,1.yaml
new file mode 100644
index 000000000000..304d6b3d9e83
--- /dev/null
+++ b/Documentation/devicetree/bindings/misc/pci1de4,1.yaml
@@ -0,0 +1,74 @@ 
+# 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 <[e-mail]>
+
+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
+
+  '#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
+
+unevaluatedProperties: false
+
+required:
+  - compatible
+  - '#interrupt-cells'
+  - interrupt-controller
+  - pci-ep-bus@1
+
+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>;
+            interrupt-controller;
+            #interrupt-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>;
+
+                rp1_clocks: clocks@c040018000 {
+                    compatible = "raspberrypi,rp1-clocks";
+                    reg = <0xc0 0x40018000 0x0 0x10038>;
+                    #clock-cells = <1>;
+                    clocks = <&clk_rp1_xosc>;
+                    clock-names =  "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 <[e-mail]>
 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