From patchwork Thu Mar 30 18:04:47 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lars-Peter Clausen X-Patchwork-Id: 669203 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 22710C6FD1D for ; Thu, 30 Mar 2023 18:05:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231310AbjC3SFK (ORCPT ); Thu, 30 Mar 2023 14:05:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40846 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229584AbjC3SFK (ORCPT ); Thu, 30 Mar 2023 14:05:10 -0400 Received: from www381.your-server.de (www381.your-server.de [78.46.137.84]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 74B92EB5C; Thu, 30 Mar 2023 11:05:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=metafoo.de; s=default2002; h=Content-Transfer-Encoding:MIME-Version:Message-Id:Date: Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:In-Reply-To:References; bh=Rz2AoL7LGg/4iMrao4MT/5InmUnB9nRTmdXgr2Ab1Ok=; b=mV4JKDBX8Zx3bEA950oD0sKCsI sQiI0ieQR6IaQmH0EOsr8VOUNGPBd/BUNyMb5JgYM2bAknI5OXZ3UImDNSUuh+deZ8Y7WHKJ4YWqQ tYLsrYhC6VDcRjNZWLKDver+bYtlsWH1cpWC8M1f3i0TfPuweT36IYOAuXHHmBWwao98G4dRyFVjA 7q/1zAW1GSwry/vI/ALiFgiqDK2MgSBIXBOc3TkMC33e5uF7ENPXPEaxcJZt2YbMIeGGYaQ280Ntd X8J8uJUm9Wx/T1AogZOzulPbd2HHzoTass8+b4Z9Y9XfnLBQ0E9VJ1pxexdTRPYqpZv8jYaiKL9Qz eSxUywAA==; Received: from sslproxy06.your-server.de ([78.46.172.3]) by www381.your-server.de with esmtpsa (TLS1.3) tls TLS_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1phwe0-0003Lr-1L; Thu, 30 Mar 2023 20:05:04 +0200 Received: from [2604:5500:c0e5:eb00:da5e:d3ff:feff:933b] (helo=lars-desktop.lan) by sslproxy06.your-server.de with esmtpsa (TLSv1.3:TLS_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1phwdz-0004Kt-FU; Thu, 30 Mar 2023 20:05:03 +0200 From: Lars-Peter Clausen To: Wolfram Sang Cc: Michal Simek , Shubhrajyoti Datta , Rob Herring , Krzysztof Kozlowski , linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, Lars-Peter Clausen Subject: [PATCH 1/2] dt-bindings: i2c: cadence: Document reset property Date: Thu, 30 Mar 2023 11:04:47 -0700 Message-Id: <20230330180448.269635-1-lars@metafoo.de> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 X-Authenticated-Sender: lars@metafoo.de X-Virus-Scanned: Clear (ClamAV 0.103.8/26859/Thu Mar 30 09:24:22 2023) Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org The Cadence I2C controller has an external reset that needs to be de-asserted before the I2C controller can be accessed. Document the `resets` devicetree property that can be used to describe how the reset signal is connected. While the reset signal will always be present in hardware the devicetree property is kept optional for backwards compatibility with existing systems that do not specify the reset property and where the reset signal might not be controlled by operating system. Signed-off-by: Lars-Peter Clausen --- Documentation/devicetree/bindings/i2c/cdns,i2c-r1p10.yaml | 3 +++ 1 file changed, 3 insertions(+) diff --git a/Documentation/devicetree/bindings/i2c/cdns,i2c-r1p10.yaml b/Documentation/devicetree/bindings/i2c/cdns,i2c-r1p10.yaml index 9187015d9702..76e2b9a10de8 100644 --- a/Documentation/devicetree/bindings/i2c/cdns,i2c-r1p10.yaml +++ b/Documentation/devicetree/bindings/i2c/cdns,i2c-r1p10.yaml @@ -24,6 +24,9 @@ properties: clocks: minItems: 1 + resets: + maxItems: 1 + interrupts: maxItems: 1