From patchwork Sat Oct 31 18:17:59 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 11871579 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D70EE92C for ; Sat, 31 Oct 2020 18:20:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BBAB1206D8 for ; Sat, 31 Oct 2020 18:20:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1604168415; bh=jbJQIsNnmVBL/hC0vfUaWlEmHz/8T8FVXPn5z06RA3w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=dLqnjygeGYKxx/svwARR84dQIrL/rnu+KUWjY5GtBJXIQAyXosWpdFXGJtAhzow6V k/Swlbnxnt28ZE99wyHvisXu07ZkNv7IbCr1e3fZQBGjfqIZfOHdMwKR5gcT1E/VjI usjuz57kWEwVJhmaC4PsclZ5iQKEPBoc32pTMzqQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728213AbgJaSUP (ORCPT ); Sat, 31 Oct 2020 14:20:15 -0400 Received: from mail.kernel.org ([198.145.29.99]:47344 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727967AbgJaSUP (ORCPT ); Sat, 31 Oct 2020 14:20:15 -0400 Received: from localhost.localdomain (cpc149474-cmbg20-2-0-cust94.5-4.cable.virginm.net [82.4.196.95]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id B5A1E206E3; Sat, 31 Oct 2020 18:20:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1604168414; bh=jbJQIsNnmVBL/hC0vfUaWlEmHz/8T8FVXPn5z06RA3w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=J7IOWt6PAHkN+iznkuGVNVy5FV0MNErDNX0ktTn4O02fu4z/TRS3v3lhw6qySRroU gYcNbTJjRvsfNpQn25qsWg7WpghII4fwK6F13q2njXCSYq57yt3KPttxRHyvbBczWR urKn5Ii3Km+k90wT/NFqnYNG1WGyHjNUX2kmfy7k= From: Jonathan Cameron To: linux-iio@vger.kernel.org, Rob Herring , devicetree@vger.kernel.org, linux-i2c@vger.kernel.org Cc: Wolfram Sang , Jonathan Cameron , Peter Rosin , Wolfram Sang Subject: [PATCH 1/3] dt-bindings:i2c:i2c-gate: txt to yaml conversion Date: Sat, 31 Oct 2020 18:17:59 +0000 Message-Id: <20201031181801.742585-2-jic23@kernel.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201031181801.742585-1-jic23@kernel.org> References: <20201031181801.742585-1-jic23@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org From: Jonathan Cameron Needed to reference from the invensense,mpu6050 yaml binding. Signed-off-by: Jonathan Cameron Cc: Peter Rosin Cc: Wolfram Sang --- .../devicetree/bindings/i2c/i2c-gate.txt | 41 --------------- .../devicetree/bindings/i2c/i2c-gate.yaml | 52 +++++++++++++++++++ 2 files changed, 52 insertions(+), 41 deletions(-) diff --git a/Documentation/devicetree/bindings/i2c/i2c-gate.txt b/Documentation/devicetree/bindings/i2c/i2c-gate.txt deleted file mode 100644 index 1846d236e656..000000000000 --- a/Documentation/devicetree/bindings/i2c/i2c-gate.txt +++ /dev/null @@ -1,41 +0,0 @@ -An i2c gate is useful to e.g. reduce the digital noise for RF tuners connected -to the i2c bus. Gates are similar to arbitrators in that you need to perform -some kind of operation to access the i2c bus past the arbitrator/gate, but -there are no competing masters to consider for gates and therefore there is -no arbitration happening for gates. - -Common i2c gate properties. - -- i2c-gate child node - -Required properties for the i2c-gate child node: -- #address-cells = <1>; -- #size-cells = <0>; - -Optional properties for i2c-gate child node: -- Child nodes conforming to i2c bus binding - - -Example : - - /* - An Invensense mpu9150 at address 0x68 featuring an on-chip Asahi - Kasei ak8975 compass behind a gate. - */ - - mpu9150@68 { - compatible = "invensense,mpu9150"; - reg = <0x68>; - interrupt-parent = <&gpio1>; - interrupts = <18 1>; - - i2c-gate { - #address-cells = <1>; - #size-cells = <0>; - - ax8975@c { - compatible = "ak,ak8975"; - reg = <0x0c>; - }; - }; - }; diff --git a/Documentation/devicetree/bindings/i2c/i2c-gate.yaml b/Documentation/devicetree/bindings/i2c/i2c-gate.yaml new file mode 100644 index 000000000000..29aa0690ed9a --- /dev/null +++ b/Documentation/devicetree/bindings/i2c/i2c-gate.yaml @@ -0,0 +1,52 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/i2c/i2c-gate.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Common i2c gate properties + +maintainers: + - Peter Rosin + +description: | + An i2c gate is useful to e.g. reduce the digital noise for RF tuners connected + to the i2c bus. Gates are similar to arbitrators in that you need to perform + some kind of operation to access the i2c bus past the arbitrator/gate, but + there are no competing masters to consider for gates and therefore there is + no arbitration happening for gates. + +properties: + $nodename: + const: i2c-gate + + "#address-cells": + const: 1 + + "#size-cells": + const: 0 + +patternProperties: + "^[a-zA-Z][a-zA-Z0-9,+\\-._]{0,63}@[0-9a-fA-F]+$": + type: object + description: | + Child nodes for i2c devices behind the gate. + +required: + - "#address-cells" + - "#size-cells" + +additionalProperties: true + +examples: + - | + i2c-gate { + #address-cells = <1>; + #size-cells = <0>; + ak8975@c { + compatible = "ak,ak8975"; + reg = <0x0c>; + }; + }; +... + From patchwork Sat Oct 31 18:18:00 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 11871581 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 51AD21130 for ; Sat, 31 Oct 2020 18:20:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3769A2076E for ; Sat, 31 Oct 2020 18:20:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1604168418; bh=gfl1n+x4WbQDsrGohgRC0WCtr5ijNKHsIMlJA0UxVe4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=yTNXbiSElFn8VP+bZK3NvnHBfUHmgG56eP8ywPCpPwl6zavGn6YI3SFjwOVojnj1a XUsv/PLi5vZs+5AJYzOBoFlwqL13+kmhKpY/MjFnNSFyjF9W9Epu/JRw4RpKmi/rLQ 9M9HyE+r5DqfsTJAafpEYiC0GDwEKE1ajjtkRINU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728222AbgJaSUR (ORCPT ); Sat, 31 Oct 2020 14:20:17 -0400 Received: from mail.kernel.org ([198.145.29.99]:47402 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727967AbgJaSUR (ORCPT ); Sat, 31 Oct 2020 14:20:17 -0400 Received: from localhost.localdomain (cpc149474-cmbg20-2-0-cust94.5-4.cable.virginm.net [82.4.196.95]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id B119B20709; Sat, 31 Oct 2020 18:20:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1604168416; bh=gfl1n+x4WbQDsrGohgRC0WCtr5ijNKHsIMlJA0UxVe4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Brepfq6Uj7dYMC7nt5hp2NcJ2NywXysRiXpLMqS6SWXied/SlgCtS6UEmLARQAuru FT3LaD6LSjyr0SFthw/CWKqF0cl+jpCyrddfGuFc4BGa2hXEXZrRHvGwUL2hjYF0YF dyoIlNMU2JCWVXLYkKMZqtBTA0ck/skcFcI078X8= From: Jonathan Cameron To: linux-iio@vger.kernel.org, Rob Herring , devicetree@vger.kernel.org, linux-i2c@vger.kernel.org Cc: Wolfram Sang , Jonathan Cameron , Jean-Baptiste Maneyrol , Wolfram Sang , Peter Rosin Subject: [PATCH 2/3] dt-bindings:iio:imu:invensense,mpu6050: txt to yaml conversion Date: Sat, 31 Oct 2020 18:18:00 +0000 Message-Id: <20201031181801.742585-3-jic23@kernel.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201031181801.742585-1-jic23@kernel.org> References: <20201031181801.742585-1-jic23@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org From: Jonathan Cameron Relies on the patch to convert i2c-gate over to yaml. 2 prior examples combinded into one as a single example can show all of the binding elements as long as the right part is selected. I don't know if there is a simple way to exclude i2c-gate if the master interface is SPI. Signed-off-by: Jonathan Cameron Cc: Jean-Baptiste Maneyrol Cc: Wolfram Sang Cc: Peter Rosin Reviewed-by: Rob Herring --- .../bindings/iio/imu/inv_mpu6050.txt | 67 ----------- .../bindings/iio/imu/invensense,mpu6050.yaml | 105 ++++++++++++++++++ 2 files changed, 105 insertions(+), 67 deletions(-) diff --git a/Documentation/devicetree/bindings/iio/imu/inv_mpu6050.txt b/Documentation/devicetree/bindings/iio/imu/inv_mpu6050.txt deleted file mode 100644 index f2f64749e818..000000000000 --- a/Documentation/devicetree/bindings/iio/imu/inv_mpu6050.txt +++ /dev/null @@ -1,67 +0,0 @@ -InvenSense MPU-6050 Six-Axis (Gyro + Accelerometer) MEMS MotionTracking Device - -http://www.invensense.com/mems/gyro/mpu6050.html - -Required properties: - - compatible : should be one of - "invensense,mpu6000" - "invensense,mpu6050" - "invensense,mpu6500" - "invensense,mpu6515" - "invensense,mpu9150" - "invensense,mpu9250" - "invensense,mpu9255" - "invensense,icm20608" - "invensense,icm20609" - "invensense,icm20689" - "invensense,icm20602" - "invensense,icm20690" - "invensense,iam20680" - - reg : the I2C address of the sensor - - interrupts: interrupt mapping for IRQ. It should be configured with flags - IRQ_TYPE_LEVEL_HIGH, IRQ_TYPE_EDGE_RISING, IRQ_TYPE_LEVEL_LOW or - IRQ_TYPE_EDGE_FALLING. - - Refer to interrupt-controller/interrupts.txt for generic interrupt client node - bindings. - -Optional properties: - - vdd-supply: regulator phandle for VDD supply - - vddio-supply: regulator phandle for VDDIO supply - - mount-matrix: an optional 3x3 mounting rotation matrix - - i2c-gate node. These devices also support an auxiliary i2c bus. This is - simple enough to be described using the i2c-gate binding. See - i2c/i2c-gate.txt for more details. - -Example: - mpu6050@68 { - compatible = "invensense,mpu6050"; - reg = <0x68>; - interrupt-parent = <&gpio1>; - interrupts = <18 IRQ_TYPE_EDGE_RISING>; - mount-matrix = "-0.984807753012208", /* x0 */ - "0", /* y0 */ - "-0.173648177666930", /* z0 */ - "0", /* x1 */ - "-1", /* y1 */ - "0", /* z1 */ - "-0.173648177666930", /* x2 */ - "0", /* y2 */ - "0.984807753012208"; /* z2 */ - }; - - - mpu9250@68 { - compatible = "invensense,mpu9250"; - reg = <0x68>; - interrupt-parent = <&gpio3>; - interrupts = <21 IRQ_TYPE_LEVEL_HIGH>; - i2c-gate { - #address-cells = <1>; - #size-cells = <0>; - ax8975@c { - compatible = "ak,ak8975"; - reg = <0x0c>; - }; - }; - }; diff --git a/Documentation/devicetree/bindings/iio/imu/invensense,mpu6050.yaml b/Documentation/devicetree/bindings/iio/imu/invensense,mpu6050.yaml new file mode 100644 index 000000000000..f640d161773c --- /dev/null +++ b/Documentation/devicetree/bindings/iio/imu/invensense,mpu6050.yaml @@ -0,0 +1,105 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/imu/invensense,mpu6050.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: InvenSense MPU-6050 Six-Axis (Gyro + Accelerometer) MEMS MotionTracking Device + +maintainers: + - Jean-Baptiste Maneyrol + +description: | + These devices support both I2C and SPI bus interfaces. + +properties: + compatible: + enum: + - invensense,iam20680 + - invensense,icm20608 + - invensense,icm20609 + - invensense,icm20689 + - invensense,icm20602 + - invensense,icm20690 + - invensense,mpu6000 + - invensense,mpu6050 + - invensense,mpu6500 + - invensense,mpu6515 + - invensense,mpu9150 + - invensense,mpu9250 + - invensense,mpu9255 + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + spi-max-frequency: true + + vdd-supply: true + vddio-supply: true + + mount-matrix: true + + i2c-gate: + $ref: "../../i2c/i2c-gate.yaml" + unevaluatedProperties: false + description: | + These devices also support an auxiliary i2c bus. This is + simple enough to be described using the i2c-gate binding. + Only possible if using an I2C interface to the host. + +allOf: + - if: + not: + properties: + compatible: + contains: + enum: + - invensense,mpu9150 + - invensense,mpu9250 + - invensense,mpu9255 + then: + properties: + i2c-gate: false + +additionalProperties: false + +required: + - compatible + - reg + - interrupts + +examples: + - | + #include + i2c { + #address-cells = <1>; + #size-cells = <0>; + + imu@68 { + compatible = "invensense,mpu9250"; + reg = <0x68>; + interrupt-parent = <&gpio3>; + interrupts = <21 IRQ_TYPE_LEVEL_HIGH>; + mount-matrix = "-0.984807753012208", /* x0 */ + "0", /* y0 */ + "-0.173648177666930", /* z0 */ + "0", /* x1 */ + "-1", /* y1 */ + "0", /* z1 */ + "-0.173648177666930", /* x2 */ + "0", /* y2 */ + "0.984807753012208"; /* z2 */ + i2c-gate { + #address-cells = <1>; + #size-cells = <0>; + magnetometer@c { + compatible = "ak,ak8975"; + reg = <0x0c>; + }; + }; + }; + }; +... From patchwork Sat Oct 31 18:18:01 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 11871583 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 2BFC192C for ; Sat, 31 Oct 2020 18:20:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 135EE206DD for ; Sat, 31 Oct 2020 18:20:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1604168420; bh=tskoch4DLlTeJ2sYv4chlZZnXQWrFh+JhKivYGYdftQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=j67XF2a21eW5NFo7+dBL8t8VSEqEbD/EKxUCdSNuDfxfrTGgjNoOwg2SnLnZaT0fx Tc+NyePUahfaQfDrJBu783HgYZceGJyVV4edNMmKEIWQjEfcptFEfGgJT5PYWCrIz+ Su/ddBf7zfWjaKlwxLYpDQyf77JRegmXzgqhRjD4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728238AbgJaSUT (ORCPT ); Sat, 31 Oct 2020 14:20:19 -0400 Received: from mail.kernel.org ([198.145.29.99]:47448 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727967AbgJaSUT (ORCPT ); Sat, 31 Oct 2020 14:20:19 -0400 Received: from localhost.localdomain (cpc149474-cmbg20-2-0-cust94.5-4.cable.virginm.net [82.4.196.95]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id DBAAF206F9; Sat, 31 Oct 2020 18:20:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1604168418; bh=tskoch4DLlTeJ2sYv4chlZZnXQWrFh+JhKivYGYdftQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=o8TzeA3J0YA7LuH4SJ+rpZyvgCGcGk6H+Gz1+QTBs31Ox0Muqfq3E9Y8k2ebiY+NY gWpQKLHvMxyD1aI6uJKsz+iYWzTn5cjOzI3Q+aaxTrSsDl0puuRGtDnYG6976pGbfu EdZ9rnskK+4G8fH52Z/5qai/AEqUQzKUTxNcrj8E= From: Jonathan Cameron To: linux-iio@vger.kernel.org, Rob Herring , devicetree@vger.kernel.org, linux-i2c@vger.kernel.org Cc: Wolfram Sang , Jonathan Cameron , Linus Walleij Subject: [PATCH 3/3] dt-bindings:iio:gyro:invensense,mpu3050: txt to yaml format conversion. Date: Sat, 31 Oct 2020 18:18:01 +0000 Message-Id: <20201031181801.742585-4-jic23@kernel.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201031181801.742585-1-jic23@kernel.org> References: <20201031181801.742585-1-jic23@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org From: Jonathan Cameron Very similar to the mpu6050 binding. Only unusual element is the i2c-gate section. Example tweaked a little to include a real device behind the gate. Signed-off-by: Jonathan Cameron Cc: Linus Walleij Reviewed-by: Rob Herring Reviewed-by: Linus Walleij --- .../iio/gyroscope/invensense,mpu3050.txt | 45 ------------ .../iio/gyroscope/invensense,mpu3050.yaml | 70 +++++++++++++++++++ 2 files changed, 70 insertions(+), 45 deletions(-) diff --git a/Documentation/devicetree/bindings/iio/gyroscope/invensense,mpu3050.txt b/Documentation/devicetree/bindings/iio/gyroscope/invensense,mpu3050.txt deleted file mode 100644 index 233fe207aded..000000000000 --- a/Documentation/devicetree/bindings/iio/gyroscope/invensense,mpu3050.txt +++ /dev/null @@ -1,45 +0,0 @@ -Invensense MPU-3050 Gyroscope device tree bindings - -Required properties: - - compatible : should be "invensense,mpu3050" - - reg : the I2C address of the sensor - -Optional properties: - - interrupts : interrupt mapping for the trigger interrupt from the - internal oscillator. The following IRQ modes are supported: - IRQ_TYPE_EDGE_RISING, IRQ_TYPE_EDGE_FALLING, IRQ_TYPE_LEVEL_HIGH and - IRQ_TYPE_LEVEL_LOW. The driver should detect and configure the hardware - for the desired interrupt type. - - vdd-supply : supply regulator for the main power voltage. - - vlogic-supply : supply regulator for the signal voltage. - - mount-matrix : see iio/mount-matrix.txt - -Optional subnodes: - - The MPU-3050 will pass through and forward the I2C signals from the - incoming I2C bus, alternatively drive traffic to a slave device (usually - an accelerometer) on its own initiative. Therefore is supports a subnode - i2c gate node. For details see: i2c/i2c-gate.txt - -Example: - -mpu3050@68 { - compatible = "invensense,mpu3050"; - reg = <0x68>; - interrupt-parent = <&foo>; - interrupts = <12 IRQ_TYPE_EDGE_FALLING>; - vdd-supply = <&bar>; - vlogic-supply = <&baz>; - - /* External I2C interface */ - i2c-gate { - #address-cells = <1>; - #size-cells = <0>; - - fnord@18 { - compatible = "fnord"; - reg = <0x18>; - interrupt-parent = <&foo>; - interrupts = <13 IRQ_TYPE_EDGE_FALLING>; - }; - }; -}; diff --git a/Documentation/devicetree/bindings/iio/gyroscope/invensense,mpu3050.yaml b/Documentation/devicetree/bindings/iio/gyroscope/invensense,mpu3050.yaml new file mode 100644 index 000000000000..b0a476afb656 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/gyroscope/invensense,mpu3050.yaml @@ -0,0 +1,70 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/gyroscope/invensense,mpu3050.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Invensense MPU-3050 Gyroscope + +maintainers: + - Linus Walleij + +properties: + compatible: + const: invensense,mpu3050 + + reg: + maxItems: 1 + + vdd-supply: true + + vlogic-supply: true + + interrupts: + minItems: 1 + description: + Interrupt mapping for the trigger interrupt from the internal oscillator. + + mount-matrix: true + + i2c-gate: + $ref: "../../i2c/i2c-gate.yaml" + unevaluatedProperties: false + description: | + The MPU-3050 will pass through and forward the I2C signals from the + incoming I2C bus, alternatively drive traffic to a slave device (usually + an accelerometer) on its own initiative. Therefore is supports a subnode + i2c gate node. + +required: + - compatible + - reg + +additionalProperties: false + +examples: + - | + #include + i2c { + #address-cells = <1>; + #size-cells = <0>; + gyroscope@68 { + compatible = "invensense,mpu3050"; + reg = <0x68>; + interrupt-parent = <&foo>; + interrupts = <12 IRQ_TYPE_EDGE_FALLING>; + vdd-supply = <&bar>; + vlogic-supply = <&baz>; + + i2c-gate { + #address-cells = <1>; + #size-cells = <0>; + + magnetometer@c { + compatible = "ak,ak8975"; + reg = <0x0c>; + }; + }; + }; + }; +...