From patchwork Mon May 17 13:59:26 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 440802 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DE911C433B4 for ; Mon, 17 May 2021 15:01:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BD6B8601FC for ; Mon, 17 May 2021 15:01:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241616AbhEQPDC (ORCPT ); Mon, 17 May 2021 11:03:02 -0400 Received: from mail.kernel.org ([198.145.29.99]:60754 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241452AbhEQPBB (ORCPT ); Mon, 17 May 2021 11:01:01 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 544B561355; Mon, 17 May 2021 14:27:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1621261620; bh=IMJ8hZyHaeaxYIxJ3ChM/Z56gbfXgXe0IxNM/jf0ZWY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=immJ258L2PCvALpX/1S0Dn3b9MckEbOa7KYLgkt4COY4IjHDAz0dbeF3jiga8b98m IzTcJ063oSI4ouc57Lk6XWwWizvGFdox8TH2hyTKxZ43SMRfXCCyzzZVeV8+ZOPBJq YcGBj8z6gepB2sTS3VKwADY06Zo0A1JPHdYQnnZU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Wolfram Sang , =?utf-8?b?QmVuY2UgQ3PDs2vDoXM=?= , Sasha Levin Subject: [PATCH 5.10 041/289] i2c: Add I2C_AQ_NO_REP_START adapter quirk Date: Mon, 17 May 2021 15:59:26 +0200 Message-Id: <20210517140306.584198139@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210517140305.140529752@linuxfoundation.org> References: <20210517140305.140529752@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Bence Csókás [ Upstream commit aca01415e076aa96cca0f801f4420ee5c10c660d ] This quirk signifies that the adapter cannot do a repeated START, it always issues a STOP condition after transfers. Suggested-by: Wolfram Sang Signed-off-by: Bence Csókás Signed-off-by: Wolfram Sang Signed-off-by: Sasha Levin --- include/linux/i2c.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/linux/i2c.h b/include/linux/i2c.h index 56622658b215..a670ae129f4b 100644 --- a/include/linux/i2c.h +++ b/include/linux/i2c.h @@ -687,6 +687,8 @@ struct i2c_adapter_quirks { #define I2C_AQ_NO_ZERO_LEN_READ BIT(5) #define I2C_AQ_NO_ZERO_LEN_WRITE BIT(6) #define I2C_AQ_NO_ZERO_LEN (I2C_AQ_NO_ZERO_LEN_READ | I2C_AQ_NO_ZERO_LEN_WRITE) +/* adapter cannot do repeated START */ +#define I2C_AQ_NO_REP_START BIT(7) /* * i2c_adapter is the structure used to identify a physical i2c bus along