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

Andrea della Porta
2024-10-07T12:39:51Z

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@suse.com>
---
.../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@suse.com>
+
+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@suse.com>
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