From patchwork Fri Dec 16 00:45:00 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurent Pinchart X-Patchwork-Id: 13074703 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 83DB5C46467 for ; Fri, 16 Dec 2022 00:45:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229785AbiLPApJ (ORCPT ); Thu, 15 Dec 2022 19:45:09 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57346 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229495AbiLPApI (ORCPT ); Thu, 15 Dec 2022 19:45:08 -0500 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7F88132BA9; Thu, 15 Dec 2022 16:45:07 -0800 (PST) Received: from pendragon.ideasonboard.com (213-243-189-158.bb.dnainternet.fi [213.243.189.158]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id BA756505; Fri, 16 Dec 2022 01:45:04 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1671151504; bh=as8piRAsDXFXF+yWkpC8+SXsiz2x3HwRngvZHRf1PeA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mdF/HyzKSJAV42ygH98VrCvvT/374ei48PBJzsnZLdQBKo8MgP7NkB0VjMn//iuei f4uXilCCmUiwmmrmF7YLuF6ZBZ/00AJHrAkNSMrJW1VrZMh9h7/kyt0BGpBQniH0CK 89ViUmLQxdTu6Iacz4e7NwV7oJ/Qag/ehZc0cCEs= From: Laurent Pinchart To: linux-media@vger.kernel.org Cc: linux-renesas-soc@vger.kernel.org, Kieran Bingham , Jacopo Mondi , =?utf-8?q?Niklas_S=C3=B6derlu?= =?utf-8?q?nd?= , Rob Herring , devicetree@vger.kernel.org, Krzysztof Kozlowski , Thomas Nizan Subject: [PATCH v3.1 02/12] dt-bindings: media: i2c: max9286: Add property to select I2C speed Date: Fri, 16 Dec 2022 02:45:00 +0200 Message-Id: <20221216004500.4263-1-laurent.pinchart+renesas@ideasonboard.com> X-Mailer: git-send-email 2.37.4 In-Reply-To: <20221214233825.13050-3-laurent.pinchart+renesas@ideasonboard.com> References: <20221214233825.13050-3-laurent.pinchart+renesas@ideasonboard.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org The I2C speed on the remote side (the I2C master bus of the connected serializers) is configurable, and doesn't need to match the speed of the local bus (the slave bus of the MAX9286). All remote buses must use the same speed, and the MAX9286 needs to be programmed accordingly. Add a new DT property to select the speed to make it configurable. Signed-off-by: Laurent Pinchart Reviewed-by: Rob Herring Reviewed-by: Jacopo Mondi --- Changes since v3: - Drop the property type - Add maxim,i2c-remote-bus-hz property to example Changes since v2: - Rename property to maxim,i2c-remote-bus-hz - Specify the property type --- .../devicetree/bindings/media/i2c/maxim,max9286.yaml | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml b/Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml index 4f28690eabcd..75c2d8b8c809 100644 --- a/Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml +++ b/Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml @@ -50,6 +50,13 @@ properties: '#gpio-cells': const: 2 + maxim,i2c-remote-bus-hz: + enum: [ 8470, 28300, 84700, 105000, 173000, 339000, 533000, 837000 ] + default: 105000 + description: | + The I2C clock frequency for the remote I2C buses. The value must match + the configuration of the remote serializers. + maxim,reverse-channel-microvolt: minimum: 30000 maximum: 200000 @@ -234,6 +241,7 @@ examples: gpio-controller; #gpio-cells = <2>; + maxim,i2c-remote-bus-hz = <339000>; maxim,reverse-channel-microvolt = <170000>; ports {