From: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>
To: jeanmichel.hautbois@ideasonboard.com
Cc: dave.stevenson@raspberrypi.com, devicetree@vger.kernel.org,
kernel-list@raspberrypi.com, laurent.pinchart@ideasonboard.com,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-media@vger.kernel.org,
linux-rpi-kernel@lists.infradead.org, lukasz@jany.st,
mchehab@kernel.org, naush@raspberrypi.com, robh@kernel.org,
tomi.valkeinen@ideasonboard.com,
bcm-kernel-feedback-list@broadcom.com, stefan.wahren@i2se.com
Subject: [PATCH v5 03/11] dt-bindings: media: Add bindings for bcm2835-unicam
Date: Tue, 8 Feb 2022 16:50:19 +0100 [thread overview]
Message-ID: <20220208155027.891055-4-jeanmichel.hautbois@ideasonboard.com> (raw)
In-Reply-To: <20220208155027.891055-1-jeanmichel.hautbois@ideasonboard.com>
Introduce the dt-bindings documentation for bcm2835 CCP2/CSI2 Unicam
camera interface.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
v4:
- make MAINTAINERS its own patch
- describe the reg and clocks correctly
- use a vendor entry for the number of data lanes
---
.../bindings/media/brcm,bcm2835-unicam.yaml | 117 ++++++++++++++++++
1 file changed, 117 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..1938ace23b3d
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/brcm,bcm2835-unicam.yaml
@@ -0,0 +1,117 @@
+# 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:
+ - Raspberry Pi Kernel Maintenance <kernel-list@raspberrypi.com>
+
+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 whose name starts with '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:
+ items:
+ - description: Unicam block.
+ - description: Clock Manager Image (CMI) block.
+
+ reg-names:
+ items:
+ - const: unicam
+ - const: cmi
+
+ interrupts:
+ maxItems: 1
+
+ clocks:
+ items:
+ - description: Clock to drive the LP state machine of Unicam.
+ - description: Clock for the VPU (core clock).
+
+ clock-names:
+ items:
+ - const: lp
+ - const: vpu
+
+ power-domains:
+ items:
+ - description: Unicam power domain
+
+ brcm,num-data-lanes:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ enum: [ 2, 4 ]
+ description: |
+ Number of CSI-2 data lanes supported by this Unicam instance. The number
+ of data lanes actively used is specified with the data-lanes endpoint
+ property.
+
+ port:
+ $ref: /schemas/graph.yaml#/$defs/port-base
+ unevaluatedProperties: false
+
+ properties:
+ endpoint:
+ $ref: /schemas/media/video-interfaces.yaml#
+ unevaluatedProperties: false
+
+ properties:
+ data-lanes: true
+
+ required:
+ - data-lanes
+
+ required:
+ - endpoint
+
+required:
+ - compatible
+ - reg
+ - reg-names
+ - interrupts
+ - clocks
+ - clock-names
+ - power-domains
+ - brcm,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>;
+ reg-names = "unicam", "cmi";
+ 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>;
+ brcm,num-data-lanes = <2>;
+ port {
+ csi1_ep: endpoint {
+ remote-endpoint = <&imx219_0>;
+ data-lanes = <1 2>;
+ };
+ };
+ };
+...
--
2.32.0
next prev parent reply other threads:[~2022-02-08 15:51 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-08 15:50 [PATCH v5 00/11] Add support for BCM2835 camera interface (unicam) Jean-Michel Hautbois
2022-02-08 15:50 ` [PATCH v5 01/11] media: v4l: Add V4L2-PIX-FMT-Y12P format Jean-Michel Hautbois
2022-02-08 15:50 ` [PATCH v5 02/11] media: v4l: Add V4L2-PIX-FMT-Y14P format Jean-Michel Hautbois
2022-02-08 15:50 ` Jean-Michel Hautbois [this message]
2022-02-09 18:56 ` [PATCH v5 03/11] dt-bindings: media: Add bindings for bcm2835-unicam Rob Herring
2022-02-13 15:48 ` Stefan Wahren
2022-02-14 9:39 ` Maxime Ripard
2022-02-14 9:54 ` Laurent Pinchart
2022-02-14 11:32 ` Stefan Wahren
2022-02-21 7:10 ` Laurent Pinchart
2022-02-21 10:03 ` Maxime Ripard
2022-02-21 12:45 ` Stefan Wahren
2022-02-21 12:52 ` Laurent Pinchart
2022-02-25 8:19 ` Sakari Ailus
2022-02-08 15:50 ` [PATCH v5 04/11] media: bcm2835-unicam: Add support for CCP2/CSI2 camera interface Jean-Michel Hautbois
2022-02-08 21:00 ` Stefan Wahren
2022-02-13 12:52 ` Laurent Pinchart
2022-02-13 11:17 ` Stefan Wahren
2022-02-13 12:49 ` Laurent Pinchart
2022-02-20 10:01 ` Stefan Wahren
2022-02-20 10:08 ` Laurent Pinchart
2022-02-21 9:55 ` Laurent Pinchart
2022-02-25 9:29 ` Sakari Ailus
2023-07-02 15:23 ` Laurent Pinchart
2023-07-02 18:18 ` Sakari Ailus
2023-07-02 21:45 ` Laurent Pinchart
2023-07-02 21:47 ` Laurent Pinchart
2023-07-02 21:56 ` Sakari Ailus
2023-07-02 22:01 ` Laurent Pinchart
2023-07-02 22:20 ` Sakari Ailus
2023-07-02 22:28 ` Laurent Pinchart
2023-07-02 22:33 ` Sakari Ailus
2023-07-02 21:53 ` Sakari Ailus
2023-07-02 21:58 ` Laurent Pinchart
2022-02-08 15:50 ` [PATCH v5 05/11] media: MAINTAINERS: add bcm2835 unicam driver Jean-Michel Hautbois
2022-02-08 15:58 ` Laurent Pinchart
2022-02-08 15:50 ` [PATCH v5 06/11] ARM: dts: bcm2711: Add unicam CSI nodes Jean-Michel Hautbois
2022-02-13 10:35 ` Stefan Wahren
2022-02-13 13:51 ` Stefan Wahren
2022-02-23 14:34 ` [PATCH v5.1 1/2] ARM: dts: bcm2835-rpi: Move the firmware clocks Jean-Michel Hautbois
2022-02-23 14:34 ` [PATCH v5.1 2/2] ARM: dts: bcm2711: Add unicam CSI nodes Jean-Michel Hautbois
2022-02-24 17:03 ` Stefan Wahren
2022-02-24 17:07 ` Jean-Michel Hautbois
2022-02-24 21:26 ` Stefan Wahren
2022-02-23 14:41 ` [PATCH v5.1 1/2] ARM: dts: bcm2835-rpi: Move the firmware clocks Maxime Ripard
2022-02-08 15:50 ` [PATCH v5 07/11] media: imx219: Rename mbus codes array Jean-Michel Hautbois
2022-02-08 15:50 ` [PATCH v5 08/11] media: imx219: Switch from open to init_cfg Jean-Michel Hautbois
2022-02-08 16:02 ` Laurent Pinchart
2022-02-08 16:05 ` Laurent Pinchart
2022-02-08 15:50 ` [PATCH v5 09/11] media: imx219: Introduce the set_routing operation Jean-Michel Hautbois
2022-02-21 7:17 ` Laurent Pinchart
2022-02-08 15:50 ` [PATCH v5 10/11] media: imx219: use a local v4l2_subdev to simplify reading Jean-Michel Hautbois
2022-02-08 15:50 ` [PATCH v5 11/11] media: imx219: Add support for the V4L2 subdev active state Jean-Michel Hautbois
2022-02-21 7:25 ` Laurent Pinchart
2022-02-16 20:57 ` [PATCH v5 00/11] Add support for BCM2835 camera interface (unicam) Stefan Wahren
2022-02-20 14:30 ` Jean-Michel Hautbois
2022-02-26 17:18 ` Stefan Wahren
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