From patchwork Thu Nov 2 02:53:51 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans Hu X-Patchwork-Id: 740861 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 4F637C4332F for ; Thu, 2 Nov 2023 02:54:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348035AbjKBCyL (ORCPT ); Wed, 1 Nov 2023 22:54:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33934 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347248AbjKBCyK (ORCPT ); Wed, 1 Nov 2023 22:54:10 -0400 Received: from mx2.zhaoxin.com (mx2.zhaoxin.com [203.110.167.99]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DFBC911D for ; Wed, 1 Nov 2023 19:54:06 -0700 (PDT) X-ASG-Debug-ID: 1698893643-1eb14e538b03ad0002-PT6Irj Received: from ZXSHMBX3.zhaoxin.com (ZXSHMBX3.zhaoxin.com [10.28.252.165]) by mx2.zhaoxin.com with ESMTP id kqxDGmCxhBpZXNkK (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NO); Thu, 02 Nov 2023 10:54:03 +0800 (CST) X-Barracuda-Envelope-From: HansHu-oc@zhaoxin.com X-Barracuda-RBL-Trusted-Forwarder: 10.28.252.165 Received: from ZXBJMBX03.zhaoxin.com (10.29.252.7) by ZXSHMBX3.zhaoxin.com (10.28.252.165) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.27; Thu, 2 Nov 2023 10:54:03 +0800 Received: from ml-HP-ProDesk-680-G4-MT.zhaoxin.com (10.28.66.68) by ZXBJMBX03.zhaoxin.com (10.29.252.7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.27; Thu, 2 Nov 2023 10:54:02 +0800 X-Barracuda-RBL-Trusted-Forwarder: 10.28.252.165 From: Hans Hu X-Barracuda-RBL-Trusted-Forwarder: 10.29.252.7 To: , , CC: Subject: [PATCH v3 01/12] i2c: wmt: Reduce redundant: bus busy check Date: Thu, 2 Nov 2023 10:53:51 +0800 X-ASG-Orig-Subj: [PATCH v3 01/12] i2c: wmt: Reduce redundant: bus busy check Message-ID: <740a0a0cff29b236eff4fce9225ee256ceedd8d1.1698889581.git.hanshu-oc@zhaoxin.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: References: MIME-Version: 1.0 X-Originating-IP: [10.28.66.68] X-ClientProxiedBy: zxbjmbx1.zhaoxin.com (10.29.252.163) To ZXBJMBX03.zhaoxin.com (10.29.252.7) X-Barracuda-Connect: ZXSHMBX3.zhaoxin.com[10.28.252.165] X-Barracuda-Start-Time: 1698893643 X-Barracuda-Encrypted: ECDHE-RSA-AES128-GCM-SHA256 X-Barracuda-URL: https://10.28.252.36:4443/cgi-mod/mark.cgi X-Virus-Scanned: by bsmtpd at zhaoxin.com X-Barracuda-Scan-Msg-Size: 1716 X-Barracuda-BRTS-Status: 1 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using global scores of TAG_LEVEL=1000.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=9.0 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.3.116192 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org Put wmt_i2c_wait_bus_not_busy() in a more appropriate place to reduce code redundancy Signed-off-by: Hans Hu --- drivers/i2c/busses/i2c-wmt.c | 19 +++++++------------ 1 file changed, 7 insertions(+), 12 deletions(-) diff --git a/drivers/i2c/busses/i2c-wmt.c b/drivers/i2c/busses/i2c-wmt.c index 76118abc6e10..d554c6377533 100644 --- a/drivers/i2c/busses/i2c-wmt.c +++ b/drivers/i2c/busses/i2c-wmt.c @@ -128,12 +128,6 @@ static int wmt_i2c_write(struct i2c_adapter *adap, struct i2c_msg *pmsg, unsigned long wait_result; int xfer_len = 0; - if (!(pmsg->flags & I2C_M_NOSTART)) { - ret = wmt_i2c_wait_bus_not_busy(i2c_dev); - if (ret < 0) - return ret; - } - if (pmsg->len == 0) { /* * We still need to run through the while (..) once, so @@ -219,12 +213,6 @@ static int wmt_i2c_read(struct i2c_adapter *adap, struct i2c_msg *pmsg, unsigned long wait_result; u32 xfer_len = 0; - if (!(pmsg->flags & I2C_M_NOSTART)) { - ret = wmt_i2c_wait_bus_not_busy(i2c_dev); - if (ret < 0) - return ret; - } - val = readw(i2c_dev->base + REG_CR); val &= ~CR_TX_END; writew(val, i2c_dev->base + REG_CR); @@ -297,11 +285,18 @@ static int wmt_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *pmsg; int i, is_last; int ret = 0; + struct wmt_i2c_dev *i2c_dev = i2c_get_adapdata(adap); for (i = 0; ret >= 0 && i < num; i++) { is_last = ((i + 1) == num); pmsg = &msgs[i]; + if (!(pmsg->flags & I2C_M_NOSTART)) { + ret = wmt_i2c_wait_bus_not_busy(i2c_dev); + if (ret < 0) + return ret; + } + if (pmsg->flags & I2C_M_RD) ret = wmt_i2c_read(adap, pmsg, is_last); else