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dt-bindings: media: Add bindings for bcm2835-unicam
Introduce the dt-bindings documentation for bcm2835 CCP2/CSI2 Unicam camera interface. Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com> Co-developed-by: Naushir Patuck <naush@raspberrypi.com> Signed-off-by: Naushir Patuck <naush@raspberrypi.com> Co-developed-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
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Dave Stevenson
Hans Verkuil
parent
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127
Documentation/devicetree/bindings/media/brcm,bcm2835-unicam.yaml
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127
Documentation/devicetree/bindings/media/brcm,bcm2835-unicam.yaml
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/media/brcm,bcm2835-unicam.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Broadcom BCM283x Camera Interface (Unicam)
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maintainers:
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- Raspberry Pi Kernel Maintenance <kernel-list@raspberrypi.com>
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description: |-
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The Unicam block on BCM283x SoCs is the receiver for either
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CSI-2 or CCP2 data from image sensors or similar devices.
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The main platform using this SoC is the Raspberry Pi family of boards. On
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the Pi the VideoCore firmware can also control this hardware block, and
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driving it from two different processors will cause issues. To avoid this,
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the firmware checks the device tree configuration during boot. If it finds
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device tree nodes whose name starts with 'csi' then it will stop the firmware
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accessing the block, and it can then safely be used via the device tree
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binding.
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properties:
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compatible:
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const: brcm,bcm2835-unicam
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reg:
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items:
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- description: Unicam block.
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- description: Clock Manager Image (CMI) block.
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reg-names:
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items:
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- const: unicam
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- const: cmi
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interrupts:
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maxItems: 1
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clocks:
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items:
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- description: Clock to drive the LP state machine of Unicam.
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- description: Clock for the VPU (core clock).
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clock-names:
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items:
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- const: lp
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- const: vpu
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power-domains:
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items:
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- description: Unicam power domain
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brcm,num-data-lanes:
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$ref: /schemas/types.yaml#/definitions/uint32
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enum: [ 2, 4 ]
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description: |
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Number of CSI-2 data lanes supported by this Unicam instance. The number
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of data lanes actively used is specified with the data-lanes endpoint
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property.
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port:
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$ref: /schemas/graph.yaml#/$defs/port-base
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unevaluatedProperties: false
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properties:
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endpoint:
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$ref: /schemas/media/video-interfaces.yaml#
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additionalProperties: false
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properties:
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bus-type:
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enum: [ 3, 4 ]
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clock-noncontinuous: true
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data-lanes: true
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remote-endpoint: true
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required:
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- bus-type
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- data-lanes
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- remote-endpoint
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required:
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- endpoint
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required:
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- compatible
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- reg
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- reg-names
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- interrupts
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- clocks
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- clock-names
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- power-domains
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- brcm,num-data-lanes
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- port
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additionalProperties: False
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examples:
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- |
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#include <dt-bindings/clock/bcm2835.h>
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#include <dt-bindings/interrupt-controller/arm-gic.h>
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#include <dt-bindings/media/video-interfaces.h>
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#include <dt-bindings/power/raspberrypi-power.h>
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csi1: csi@7e801000 {
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compatible = "brcm,bcm2835-unicam";
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reg = <0x7e801000 0x800>,
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<0x7e802004 0x4>;
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reg-names = "unicam", "cmi";
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interrupts = <GIC_SPI 103 IRQ_TYPE_LEVEL_HIGH>;
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clocks = <&clocks BCM2835_CLOCK_CAM1>,
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<&firmware_clocks 4>;
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clock-names = "lp", "vpu";
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power-domains = <&power RPI_POWER_DOMAIN_UNICAM1>;
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brcm,num-data-lanes = <2>;
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port {
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csi1_ep: endpoint {
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remote-endpoint = <&imx219_0>;
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bus-type = <MEDIA_BUS_TYPE_CSI2_DPHY>;
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data-lanes = <1 2>;
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};
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};
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};
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...
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@ -4034,6 +4034,12 @@ N: bcm113*
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N: bcm216*
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N: kona
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BROADCOM BCM2835 CAMERA DRIVERS
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M: Raspberry Pi Kernel Maintenance <kernel-list@raspberrypi.com>
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L: linux-media@vger.kernel.org
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S: Maintained
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F: Documentation/devicetree/bindings/media/brcm,bcm2835-unicam.yaml
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BROADCOM BCM47XX MIPS ARCHITECTURE
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M: Hauke Mehrtens <hauke@hauke-m.de>
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M: Rafał Miłecki <zajec5@gmail.com>
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