From patchwork Thu May 20 09:21:25 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 445676 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, 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 7160CC433B4 for ; Thu, 20 May 2021 10:05:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 49A556142A for ; Thu, 20 May 2021 10:05:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235220AbhETKGs (ORCPT ); Thu, 20 May 2021 06:06:48 -0400 Received: from mail.kernel.org ([198.145.29.99]:36564 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235389AbhETKE6 (ORCPT ); Thu, 20 May 2021 06:04:58 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 636926142A; Thu, 20 May 2021 09:40:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1621503647; bh=fE8jg5uAIRl/bt8t+FQsXsgY5X3KlleAIN93G7Ume60=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=xecR4VJOuyt2c35Ow6spDMn/Aa5u5GTnBZaQeqb+KjUACs7qVHQY4YI9bFB4F7POe kYuEHTffeTgdkqyW8lP5cK1bs8O4tIllrYQHjkGJ86dGrCwww+HtkeFiddqV4XlNVh mkkL7OgZcUjKgUQWR7wzxBBOZ1nd/GZ/QjoIN4dk= 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 4.19 316/425] i2c: Add I2C_AQ_NO_REP_START adapter quirk Date: Thu, 20 May 2021 11:21:25 +0200 Message-Id: <20210520092141.819465740@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210520092131.308959589@linuxfoundation.org> References: <20210520092131.308959589@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 7e748648c7d3..6fda0458745d 100644 --- a/include/linux/i2c.h +++ b/include/linux/i2c.h @@ -662,6 +662,8 @@ 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