Introduce the dt-bindings documentation for bcm2835 CCP2/CSI2 Unicam camera interface. Also add a MAINTAINERS entry for it. Signed-off-by: Dave Stevenson <dave.stevenson@xxxxxxxxxxxxxxx> Signed-off-by: Naushir Patuck <naush@xxxxxxxxxxxxxxx> Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@xxxxxxxxxxxxxxxx> --- Dave: I assumed you were the maintainer for this file, as I based it on the bcm2835-unicam.txt file. Are you happy to be added directly as the maintainer, or should this be specified as "Raspberry Pi Kernel Maintenance <kernel-list@xxxxxxxxxxxxxxx>" --- .../bindings/media/brcm,bcm2835-unicam.yaml | 107 ++++++++++++++++++ MAINTAINERS | 7 ++ 2 files changed, 114 insertions(+) create mode 100644 Documentation/devicetree/bindings/media/brcm,bcm2835-unicam.yaml diff --git a/Documentation/devicetree/bindings/media/brcm,bcm2835-unicam.yaml b/Documentation/devicetree/bindings/media/brcm,bcm2835-unicam.yaml new file mode 100644 index 000000000000..5bf41a8834fa --- /dev/null +++ b/Documentation/devicetree/bindings/media/brcm,bcm2835-unicam.yaml @@ -0,0 +1,107 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/media/brcm,bcm2835-unicam.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Broadcom BCM283x Camera Interface (Unicam) + +maintainers: + - Dave Stevenson <dave.stevenson@xxxxxxxxxxxxxxx> + +description: |- + The Unicam block on BCM283x SoCs is the receiver for either + CSI-2 or CCP2 data from image sensors or similar devices. + + The main platform using this SoC is the Raspberry Pi family of boards. + On the Pi the VideoCore firmware can also control this hardware block, + and driving it from two different processors will cause issues. + To avoid this, the firmware checks the device tree configuration + during boot. If it finds device tree nodes starting by csi then + it will stop the firmware accessing the block, and it can then + safely be used via the device tree binding. + +properties: + compatible: + const: brcm,bcm2835-unicam + + reg: + maxItems: 2 + + interrupts: + maxItems: 1 + + clocks: + items: + - description: Clock for the camera. + - description: Clock for the vpu. + + clock-names: + items: + - const: lp + - const: vpu + + power-domains: + items: + - description: Unicam power domain + + num-data-lanes: + items: + - enum: [ 2, 4 ] + + port: + additionalProperties: false + $ref: /schemas/graph.yaml#/$defs/port-base + + properties: + endpoint: + $ref: /schemas/media/video-interfaces.yaml# + unevaluatedProperties: false + + properties: + data-lanes: true + link-frequencies: true + + required: + - data-lanes + - link-frequencies + + required: + - endpoint + +required: + - compatible + - reg + - interrupts + - clocks + - clock-names + - power-domains + - num-data-lanes + - port + +additionalProperties: False + +examples: + - | + #include <dt-bindings/clock/bcm2835.h> + #include <dt-bindings/interrupt-controller/arm-gic.h> + #include <dt-bindings/power/raspberrypi-power.h> + csi1: csi@7e801000 { + compatible = "brcm,bcm2835-unicam"; + reg = <0x7e801000 0x800>, + <0x7e802004 0x4>; + interrupts = <GIC_SPI 103 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&clocks BCM2835_CLOCK_CAM1>, + <&firmware_clocks 4>; + clock-names = "lp", "vpu"; + power-domains = <&power RPI_POWER_DOMAIN_UNICAM1>; + num-data-lanes = <2>; + port { + csi1_ep: endpoint { + remote-endpoint = <&imx219_0>; + data-lanes = <1 2>; + link-frequencies = /bits/ 64 <456000000>; + }; + }; + }; +... diff --git a/MAINTAINERS b/MAINTAINERS index a0770a861ca4..29344ea86847 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -3670,6 +3670,13 @@ N: bcm113* N: bcm216* N: kona +BROADCOM BCM2835 CAMERA DRIVER +M: Raspberry Pi Kernel Maintenance <kernel-list@xxxxxxxxxxxxxxx> +L: linux-media@xxxxxxxxxxxxxxx +S: Maintained +F: Documentation/devicetree/bindings/media/brcm,bcm2835-unicam.yaml +F: arch/arm/boot/dts/bcm283x* + BROADCOM BCM47XX MIPS ARCHITECTURE M: Hauke Mehrtens <hauke@xxxxxxxxxx> M: Rafał Miłecki <zajec5@xxxxxxxxx> -- 2.32.0
