From nobody Thu Sep 18 05:25:07 2025 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 58618C04FDE for ; Fri, 9 Dec 2022 22:47:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229950AbiLIWrp (ORCPT ); Fri, 9 Dec 2022 17:47:45 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44494 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229885AbiLIWrV (ORCPT ); Fri, 9 Dec 2022 17:47:21 -0500 Received: from esa.microchip.iphmx.com (esa.microchip.iphmx.com [68.232.153.233]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 69499A5DE4; Fri, 9 Dec 2022 14:47:20 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1670626040; x=1702162040; h=from:to:subject:date:message-id:in-reply-to:references: mime-version; bh=01J1GdfGeDpMqj5EEuZPKItLr8DiKEKk/dDza5yX0co=; b=PpkHHs37s77kPHiDMUJG1YQGSUS+MiBZ2E+Jf6VbtXjRAiljUCmj5oo+ cjsPXbxXjqvAhAIlBbBzJ+WYfvJ6x82IUwthUfgpuArnZ0JKpknFnXxyb 4bameXe1tJOqbyg2CjDRSYhs4yePjTgi62/acZfhX+TX+LLVc4B3FPKs/ azJ9revQuxKwR2qNZdLxLbc/4HZ5GBiNCbvyTyhTCR3Qe69nHacNCim2o XXK0JrpQdF1JBkHRetziDjzBAT//ybYUYGKK4yyKjkQP2CLVUQNHHmhTb 27t5Oi8slqJ1ujO4bQa+tv51YDcs9QyU+LjroP1BjLIp6mZf7seKw32hs Q==; X-IronPort-AV: E=Sophos;i="5.96,232,1665471600"; d="scan'208";a="203381009" Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa1.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 09 Dec 2022 15:47:19 -0700 Received: from chn-vm-ex03.mchp-main.com (10.10.85.151) by chn-vm-ex02.mchp-main.com (10.10.85.144) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.12; Fri, 9 Dec 2022 15:47:19 -0700 Received: from AUS-LT-C33025.microchip.com (10.10.115.15) by chn-vm-ex03.mchp-main.com (10.10.85.151) with Microsoft SMTP Server id 15.1.2507.12 via Frontend Transport; Fri, 9 Dec 2022 15:47:18 -0700 From: Jerry Ray To: Andrew Lunn , Florian Fainelli , Vladimir Oltean , "David S. Miller" , Eric Dumazet , Jakub Kicinski , "Paolo Abeni" , , , , , Jerry Ray Subject: [PATCH net-next v5 4/6] dsa: lan9303: Performance Optimization Date: Fri, 9 Dec 2022 16:47:11 -0600 Message-ID: <20221209224713.19980-5-jerry.ray@microchip.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20221209224713.19980-1-jerry.ray@microchip.com> References: <20221209224713.19980-1-jerry.ray@microchip.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" As the regmap_write() is over a slow bus that will sleep, we can speed up the boot-up time a bit my not bothering to clear a bit that is already clear. Signed-off-by: Jerry Ray --- drivers/net/dsa/lan9303-core.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/net/dsa/lan9303-core.c b/drivers/net/dsa/lan9303-core.c index b0f49d9c3d0c..694249aa1f19 100644 --- a/drivers/net/dsa/lan9303-core.c +++ b/drivers/net/dsa/lan9303-core.c @@ -891,8 +891,11 @@ static int lan9303_check_device(struct lan9303 *chip) if (ret) return (ret); =20 - reg &=3D ~LAN9303_VIRT_SPECIAL_TURBO; - regmap_write(chip->regmap, LAN9303_VIRT_SPECIAL_CTRL, reg); + /* Clear the TURBO Mode bit if it was set. */ + if (reg & LAN9303_VIRT_SPECIAL_TURBO) { + reg &=3D ~LAN9303_VIRT_SPECIAL_TURBO; + regmap_write(chip->regmap, LAN9303_VIRT_SPECIAL_CTRL, reg); + } =20 return 0; } --=20 2.17.1