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[v6,5/7] media: dt-bindings: Add bindings for Raspberry Pi PiSP Back End

Message ID 20240502110503.38412-6-jacopo.mondi@ideasonboard.com
State New
Headers show
Series media: raspberrypi: Add support for PiSP Back End | expand

Commit Message

Jacopo Mondi May 2, 2024, 11:05 a.m. UTC 
Add bindings for the Raspberry Pi PiSP Back End memory-to-memory image
signal processor.

Datasheet:
https://datasheets.raspberrypi.com/camera/raspberry-pi-image-signal-processor-specification.pdf

Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Naushir Patuck <naush@raspberrypi.com>
---
v5->v6:
- No changes

v4->v5:
- No changes

v3->v4:
- Drop 'clock-names' as we have been confirmed there's a single clock

v2->v3:
- Add back 'clock-names' as suggested by Laurent
- Add Rob's ack
- minor grammar/style fixes
---
 .../bindings/media/raspberrypi,pispbe.yaml    | 63 +++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/media/raspberrypi,pispbe.yaml

--
2.44.0
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Patch

diff --git a/Documentation/devicetree/bindings/media/raspberrypi,pispbe.yaml b/Documentation/devicetree/bindings/media/raspberrypi,pispbe.yaml
new file mode 100644
index 000000000000..1fc62a1d8eda
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/raspberrypi,pispbe.yaml
@@ -0,0 +1,63 @@ 
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/media/raspberrypi,pispbe.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Raspberry Pi PiSP Image Signal Processor (ISP) Back End
+
+maintainers:
+  - Raspberry Pi Kernel Maintenance <kernel-list@raspberrypi.com>
+  - Jacopo Mondi <jacopo.mondi@ideasonboard.com>
+
+description: |
+  The Raspberry Pi PiSP Image Signal Processor (ISP) Back End is an image
+  processor that fetches images in Bayer or Grayscale format from DRAM memory
+  in tiles and produces images consumable by applications.
+
+  The full ISP documentation is available at
+  https://datasheets.raspberrypi.com/camera/raspberry-pi-image-signal-processor-specification.pdf
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - brcm,bcm2712-pispbe
+      - const: raspberrypi,pispbe
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  iommus:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    soc {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        isp@880000  {
+             compatible = "brcm,bcm2712-pispbe", "raspberrypi,pispbe";
+             reg = <0x10 0x00880000 0x0 0x4000>;
+             interrupts = <GIC_SPI 72 IRQ_TYPE_LEVEL_HIGH>;
+             clocks = <&firmware_clocks 7>;
+             iommus = <&iommu2>;
+        };
+    };