From nobody Fri Sep 12 01:31:57 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 A1C19C001B0 for ; Tue, 8 Aug 2023 18:46:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232895AbjHHSqP (ORCPT ); Tue, 8 Aug 2023 14:46:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47354 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232905AbjHHSpt (ORCPT ); Tue, 8 Aug 2023 14:45:49 -0400 Received: from mx0b-001ae601.pphosted.com (mx0b-001ae601.pphosted.com [67.231.152.168]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2B7BD114C81 for ; Tue, 8 Aug 2023 09:47:42 -0700 (PDT) Received: from pps.filterd (m0077474.ppops.net [127.0.0.1]) by mx0b-001ae601.pphosted.com (8.17.1.22/8.17.1.22) with ESMTP id 378GfYwG012826; Tue, 8 Aug 2023 11:47:07 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cirrus.com; h= from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding:content-type; s= PODMain02222019; bh=7RZLhRQ+381XYUDrqoqfoe0OVQjJKugGtd0GWZHvb+4=; b= O/pVAMLEaRntg+Ct3WXnVTbK6hmMBeSwKpZPzyWrb+VqZjQd2GLEul+R7gUkuUFx 2NiOZEbPJNiwuEqWvbeM1mtSX0ZiQrckGtX7LANoOEZT0hP75Ts6tKOtz+sBHhfq 3uafn4i2w/ij1Cjcco0BRkkQStBS/+7G2kEGkjPCLcYZkjtvMf9CaWgLnY43R3ZM qZ08SVK8+6I9YHXmNleskA1zVS8AZI+W1SqY72D7zGReY17KT84/Su9AMOLW5vLn QQoWaV//qC0vgb8KNdKOFxrsNCmGDRyRa6HyRSCpjiqyU+BJvsyCwKe5qsOL2Ys7 0SgMTt6a5ddVEahHGwFMnQ== Received: from ediex01.ad.cirrus.com ([84.19.233.68]) by mx0b-001ae601.pphosted.com (PPS) with ESMTPS id 3s9juhtucr-3 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 08 Aug 2023 11:47:07 -0500 (CDT) Received: from ediex02.ad.cirrus.com (198.61.84.81) by ediex01.ad.cirrus.com (198.61.84.80) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.30; Tue, 8 Aug 2023 17:47:05 +0100 Received: from ediswmail.ad.cirrus.com (198.61.86.93) by anon-ediex02.ad.cirrus.com (198.61.84.81) with Microsoft SMTP Server id 15.2.1118.30 via Frontend Transport; Tue, 8 Aug 2023 17:47:05 +0100 Received: from EDIN4L06LR3.ad.cirrus.com (EDIN4L06LR3.ad.cirrus.com [198.61.64.220]) by ediswmail.ad.cirrus.com (Postfix) with ESMTP id 4E8963575; Tue, 8 Aug 2023 16:47:05 +0000 (UTC) From: Richard Fitzgerald To: CC: , , , Richard Fitzgerald Subject: [PATCH 3/5] ASoC: cs35l56: Wait for control port ready during system-resume Date: Tue, 8 Aug 2023 17:47:00 +0100 Message-ID: <20230808164702.21272-4-rf@opensource.cirrus.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230808164702.21272-1-rf@opensource.cirrus.com> References: <20230808164702.21272-1-rf@opensource.cirrus.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Proofpoint-GUID: XHuMFLKBPZboRX8wriv0npaa4Urk6y63 X-Proofpoint-ORIG-GUID: XHuMFLKBPZboRX8wriv0npaa4Urk6y63 X-Proofpoint-Spam-Reason: safe Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The CS35L56 could be hard-reset during a system suspend-resume cycle, either by the codec driver, in cs35l56_system_resume_early(), or by ACPI. After a hard reset the driver must wait for the control port to be ready (datasheet tIRS time) before attempting to access the CS35L56. Signed-off-by: Richard Fitzgerald --- sound/soc/codecs/cs35l56.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/sound/soc/codecs/cs35l56.c b/sound/soc/codecs/cs35l56.c index 9560059c867b..094bcbd0a174 100644 --- a/sound/soc/codecs/cs35l56.c +++ b/sound/soc/codecs/cs35l56.c @@ -952,6 +952,12 @@ int cs35l56_system_resume(struct device *dev) =20 dev_dbg(dev, "system_resume\n"); =20 + /* + * We might have done a hard reset or the CS35L56 was power-cycled + * so wait for control port to be ready. + */ + cs35l56_wait_control_port_ready(); + /* Undo pm_runtime_force_suspend() before re-enabling the irq */ ret =3D pm_runtime_force_resume(dev); if (cs35l56->base.irq) --=20 2.30.2