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[2620:137:e000::1:20]) by mx.google.com with ESMTP id c20-20020a6566d4000000b00518d97e15ebsi12870699pgw.431.2023.04.25.00.36.15; Tue, 25 Apr 2023 00:36:27 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass (test mode) header.i=@ideasonboard.com header.s=mail header.b=wUAfIPQC; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233485AbjDYH0f (ORCPT + 99 others); Tue, 25 Apr 2023 03:26:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39210 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233454AbjDYH0a (ORCPT ); Tue, 25 Apr 2023 03:26:30 -0400 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [IPv6:2001:4b98:dc2:55:216:3eff:fef7:d647]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1940DA248; Tue, 25 Apr 2023 00:26:23 -0700 (PDT) Received: from desky.lan (91-154-35-171.elisa-laajakaista.fi [91.154.35.171]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id B59D8814; Tue, 25 Apr 2023 09:26:08 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1682407570; bh=5H0OwXbshXmp/wfYVq5nPVdyfVVWklEKsADyZpAI2Ic=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=wUAfIPQCDfhAQBpeFu1JJI411g0+FVFrbHW8b2hC3uY+6Y+OrruRLEdFNtPM4uyjW wOmTss11qf4q7Tcdf6o9DoJKl59rBFJbnkd69DLxvIEHpo471Q/A09Gf4ujZu1Zd8D ewaJPYwK+pSOM2oUTKJthWd5PoMRyVJyL1To47CI= From: Tomi Valkeinen To: linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-i2c@vger.kernel.org, Rob Herring , Krzysztof Kozlowski , Wolfram Sang , Luca Ceresoli , Andy Shevchenko , Matti Vaittinen , Laurent Pinchart Cc: Mauro Carvalho Chehab , Peter Rosin , Liam Girdwood , Mark Brown , Sakari Ailus , Michael Tretter , Hans Verkuil , Mike Pagano , =?utf-8?q?Krzysztof_Ha=C5=82asa?= , Marek Vasut , Satish Nagireddy , Tomi Valkeinen Subject: [PATCH v12 1/8] dt-bindings: i2c: Add I2C Address Translator (ATR) Date: Tue, 25 Apr 2023 10:25:54 +0300 Message-Id: <20230425072601.51031-2-tomi.valkeinen@ideasonboard.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230425072601.51031-1-tomi.valkeinen@ideasonboard.com> References: <20230425072601.51031-1-tomi.valkeinen@ideasonboard.com> MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_PASS,SPF_PASS, T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1764132847631994373?= X-GMAIL-MSGID: =?utf-8?q?1764132847631994373?= Add bindings for I2C Address Translator. Only one property is added, 'i2c-alias-pool', which can be used in the bindings for the device that supports ATR. Signed-off-by: Tomi Valkeinen Acked-by: Wolfram Sang --- .../devicetree/bindings/i2c/i2c-atr.yaml | 34 +++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 Documentation/devicetree/bindings/i2c/i2c-atr.yaml diff --git a/Documentation/devicetree/bindings/i2c/i2c-atr.yaml b/Documentation/devicetree/bindings/i2c/i2c-atr.yaml new file mode 100644 index 000000000000..470cc6c9af35 --- /dev/null +++ b/Documentation/devicetree/bindings/i2c/i2c-atr.yaml @@ -0,0 +1,34 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/i2c/i2c-atr.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Common i2c address translator properties. + +maintainers: + - Tomi Valkeinen + +description: + An I2C Address Translator (ATR) is a device with an I2C slave parent + ("upstream") port and N I2C master child ("downstream") ports, and + forwards transactions from upstream to the appropriate downstream port + with a modified slave address. The address used on the parent bus is + called the "alias" and is (potentially) different from the physical + slave address of the child bus. Address translation is done by the + hardware. + +properties: + i2c-alias-pool: + $ref: /schemas/types.yaml#/definitions/uint16-array + description: + I2C alias pool is a pool of I2C addresses on the main I2C bus that can be + used to access the remote peripherals on the serializer's I2C bus. The + addresses must be available, not used by any other peripheral. Each + remote peripheral is assigned an alias from the pool, and transactions to + that address will be forwarded to the remote peripheral, with the address + translated to the remote peripheral's real address. This property is not + needed if there are no I2C addressable remote peripherals. + +additionalProperties: true +...