Introduce the dt-bindinds documentation for bcm2835 CCP2/CSI2 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>" - in v2: multiple corrections to pass the bot checking as Rob kindly told me. --- .../bindings/media/brcm,bcm2835-unicam.yaml | 103 ++++++++++++++++++ MAINTAINERS | 6 + 2 files changed, 109 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..1427514142cf --- /dev/null +++ b/Documentation/devicetree/bindings/media/brcm,bcm2835-unicam.yaml @@ -0,0 +1,103 @@ +# 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 called csi0 or csi1 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: + description: + physical base address and length of the register sets for the device. + maxItems: 1 + + interrupts: + description: the IRQ line for this Unicam instance. + maxItems: 1 + + clocks: + description: |- + list of clock specifiers, corresponding to entries in clock-names + property. + + clock-names: + items: + - const: lp + - const: vpu + + port: + $ref: /schemas/graph.yaml#/properties/port + +required: + - compatible + - reg + - interrupts + - clocks + - clock-names + - port + +additionalProperties: False + +examples: + - | + csi1: csi1@7e801000 { + compatible = "brcm,bcm2835-unicam"; + reg = <0x7e801000 0x800>, + <0x7e802004 0x4>; + interrupts = <2 7>; + clocks = <&clocks BCM2835_CLOCK_CAM1>, + <&firmware_clocks 4>; + clock-names = "lp", "vpu"; + port { + csi1_ep: endpoint { + remote-endpoint = <&tc358743_0>; + data-lanes = <1 2>; + }; + }; + }; + + i2c0: i2c@7e205000 { + tc358743: csi-hdmi-bridge@0f { + compatible = "toshiba,tc358743"; + reg = <0x0f>; + clocks = <&tc358743_clk>; + clock-names = "refclk"; + + tc358743_clk: bridge-clk { + compatible = "fixed-clock"; + #clock-cells = <0>; + clock-frequency = <27000000>; + }; + + port { + tc358743_0: endpoint { + remote-endpoint = <&csi1_ep>; + clock-lanes = <0>; + data-lanes = <1 2>; + clock-noncontinuous; + link-frequencies = + /bits/ 64 <297000000>; + }; + }; + }; + }; +... diff --git a/MAINTAINERS b/MAINTAINERS index 33f75892f98e..07f238fd5ff9 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -3679,6 +3679,12 @@ F: Documentation/media/v4l-drivers/bcm2835-isp.rst F: drivers/staging/vc04_services/bcm2835-isp F: include/uapi/linux/bcm2835-isp.h +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 + BROADCOM BCM47XX MIPS ARCHITECTURE M: Hauke Mehrtens <hauke@xxxxxxxxxx> M: Rafał Miłecki <zajec5@xxxxxxxxx> -- 2.32.0
