[PATCH v10 05/17] dt-bindings: media: Add bindings for ARM mali-c55

Daniel Scally
2025-06-24T10:21:41Z

Add the yaml binding for ARM's Mali-C55 Image Signal Processor.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Nayden Kanchev <nayden.kanchev@arm.com>
Co-developed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Signed-off-by: Daniel Scally <dan.scally@ideasonboard.com>
---
Changes in v10:

- None

Changes in v9:

- Added the arm,inline_mode property to differentiate between inline and
memory input configurations

Changes in v8:

- Added the video clock back in. Now that we have actual hardware it's
clear that it's necessary.
- Added reset lines
- Dropped R-bs

Changes in v7:

- None

Changes in v6:

- None

Changes in v5:

- None

Changes in v4:

- Switched to port instead of ports

Changes in v3:

- Dropped the video clock as suggested by Laurent. I didn't retain it
for the purposes of the refcount since this driver will call .s_stream()
for the sensor driver which will refcount the clock anyway.
- Clarified that the port is a parallel input port rather (Sakari)

Changes in v2:

- Added clocks information
- Fixed the warnings raised by Rob
---
.../devicetree/bindings/media/arm,mali-c55.yaml | 89 ++++++++++++++++++++++
1 file changed, 89 insertions(+)

diff --git a/Documentation/devicetree/bindings/media/arm,mali-c55.yaml b/Documentation/devicetree/bindings/media/arm,mali-c55.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..539fa8163bd07cf8a80c361012400cbcc7d073eb
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/arm,mali-c55.yaml
@@ -0,0 +1,89 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/media/arm,mali-c55.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ARM Mali-C55 Image Signal Processor
+
+maintainers:
+ - Daniel Scally <dan.scally@ideasonboard.com>
+ - Jacopo Mondi <jacopo.mondi@ideasonboard.com>
+
+properties:
+ compatible:
+ const: arm,mali-c55
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ clocks:
+ items:
+ - description: ISP Video Clock
+ - description: ISP AXI clock
+ - description: ISP AHB-lite clock
+
+ clock-names:
+ items:
+ - const: vclk
+ - const: aclk
+ - const: hclk
+
+ resets:
+ items:
+ - description: vclk domain reset
+ - description: aclk domain reset
+ - description: hclk domain reset
+
+ reset-names:
+ items:
+ - const: vresetn
+ - const: aresetn
+ - const: hresetn
+
+ port:
+ $ref: /schemas/graph.yaml#/properties/port
+ description: Input parallel video bus
+
+ properties:
+ endpoint:
+ $ref: /schemas/graph.yaml#/properties/endpoint
+
+ arm,inline_mode:
+ description:
+ The ISP can be either electrically connected to sensor and CSI-2 receiver
+ or driven through a DMA input device. This property declares the ISP as
+ being electrically connected to the source of image data.
+ type: boolean
+
+required:
+ - compatible
+ - reg
+ - interrupts
+ - clocks
+ - clock-names
+ - port
+
+additionalProperties: false
+
+examples:
+ - |
+ mali_c55: isp@400000 {
+ compatible = "arm,mali-c55";
+ reg = <0x400000 0x200000>;
+ clocks = <&clk 0>, <&clk 1>, <&clk 2>;
+ clock-names = "vclk", "aclk", "hclk";
+ resets = <&resets 0>, <&resets 1>, <&resets 2>;
+ reset-names = "vresetn", "aresetn", "hresetn";
+ interrupts = <0>;
+
+ port {
+ isp_in: endpoint {
+ remote-endpoint = <&csi2_rx_out>;
+ };
+ };
+ };
+...

--
2.34.1