From patchwork Fri Nov 25 13:17:59 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Chevallier X-Patchwork-Id: 13055925 X-Patchwork-Delegate: kuba@kernel.org 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 07EC8C43217 for ; Fri, 25 Nov 2022 13:18:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229542AbiKYNSN (ORCPT ); Fri, 25 Nov 2022 08:18:13 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48166 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229688AbiKYNSM (ORCPT ); Fri, 25 Nov 2022 08:18:12 -0500 Received: from relay11.mail.gandi.net (relay11.mail.gandi.net [217.70.178.231]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D3B296314; Fri, 25 Nov 2022 05:18:10 -0800 (PST) Received: (Authenticated sender: maxime.chevallier@bootlin.com) by mail.gandi.net (Postfix) with ESMTPSA id 91A2910000C; Fri, 25 Nov 2022 13:18:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1669382289; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=55j9+pE5serVzhnMTbv/yWHlwVqG0P8aXjk+91N8pmo=; b=SiOXIiLYraXwB85aZtJFfKRo6XCjpwXBNzHzXLTa1n1xVN9B4F4cVUdYoUL5xzUDi5aD8C mamEZ7hnUlvXa2l0lcG0A5M7Zg6Q8NohX8z9aNt8X8XcH28q5SGdwwiZeCN/3RhvmTMt9W rdKT+qb/vBD1ddGSoC9TKCw9tdjcoTskdaPB5e4lst2JvsPsG8k7vxTb1a76sCLqgf2OzT cuUSHHetIhIu52TSdgwzYLkmuvGdx1J7NqAmPQwDxrQup2/GcoyyNOBPVniPJ8WBqcAS8A 6KbMxbEpwSMpNa/ZiDj0eAjf5/EWyd6iMB8QtiFIr60CG3/gEmikL/BelB23AA== From: Maxime Chevallier To: davem@davemloft.net, Rob Herring Cc: Maxime Chevallier , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, thomas.petazzoni@bootlin.com, Andrew Lunn , Jakub Kicinski , Eric Dumazet , Paolo Abeni , Florian Fainelli , Heiner Kallweit , Russell King , linux-arm-kernel@lists.infradead.org, Krzysztof Kozlowski , devicetree@vger.kernel.org Subject: [PATCH net-next 1/3] net: pcs: altera-tse: use read_poll_timeout to wait for reset Date: Fri, 25 Nov 2022 14:17:59 +0100 Message-Id: <20221125131801.64234-2-maxime.chevallier@bootlin.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221125131801.64234-1-maxime.chevallier@bootlin.com> References: <20221125131801.64234-1-maxime.chevallier@bootlin.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org Software resets on the TSE PCS don't clear registers, but rather reset all internal state machines regarding AN, comma detection and encoding/decoding. Use read_poll_timeout to wait for the reset to clear instead of manually polling the register. Signed-off-by: Maxime Chevallier --- drivers/net/pcs/pcs-altera-tse.c | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-) diff --git a/drivers/net/pcs/pcs-altera-tse.c b/drivers/net/pcs/pcs-altera-tse.c index 97a7cabff962..e86cadc391e8 100644 --- a/drivers/net/pcs/pcs-altera-tse.c +++ b/drivers/net/pcs/pcs-altera-tse.c @@ -60,7 +60,6 @@ static void tse_pcs_write(struct altera_tse_pcs *tse_pcs, int regnum, static int tse_pcs_reset(struct altera_tse_pcs *tse_pcs) { - int i = 0; u16 bmcr; /* Reset PCS block */ @@ -68,13 +67,9 @@ static int tse_pcs_reset(struct altera_tse_pcs *tse_pcs) bmcr |= BMCR_RESET; tse_pcs_write(tse_pcs, MII_BMCR, bmcr); - for (i = 0; i < SGMII_PCS_SW_RESET_TIMEOUT; i++) { - if (!(tse_pcs_read(tse_pcs, MII_BMCR) & BMCR_RESET)) - return 0; - udelay(1); - } - - return -ETIMEDOUT; + return read_poll_timeout(tse_pcs_read, bmcr, (bmcr & BMCR_RESET), + 10, SGMII_PCS_SW_RESET_TIMEOUT, 1, + tse_pcs, MII_BMCR); } static int alt_tse_pcs_validate(struct phylink_pcs *pcs,