From mboxrd@z Thu Jan 1 00:00:00 1970 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=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 721C0C4321A for ; Fri, 5 Mar 2021 17:35:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5886F650A3 for ; Fri, 5 Mar 2021 17:35:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229446AbhCERf2 (ORCPT ); Fri, 5 Mar 2021 12:35:28 -0500 Received: from mx0a-001ae601.pphosted.com ([67.231.149.25]:14282 "EHLO mx0b-001ae601.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S229882AbhCERfM (ORCPT ); Fri, 5 Mar 2021 12:35:12 -0500 Received: from pps.filterd (m0077473.ppops.net [127.0.0.1]) by mx0a-001ae601.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 125HWXhQ005984; Fri, 5 Mar 2021 11:34:51 -0600 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=thc2Jy6DJcx0Qu+2XNlj2PUXNyf0MUDl4YhAFw37iFs=; b=WwLUFBT0VZLBQ7XJ+LGRbXnjt3DGuHOqGLHWoVJhdE2nAWZfc/8g/e8ZJArEoz4uAPNw idPbc9nvwjWLyAPYXBsQW5TG8JyJQN9VOElnaaXsqhC/jzUcshA+7xzEyukx8qSjm277 WMZdH+rLg3/idHRhTTfQmk3WrN/MuZnt3vsN/y7id5ceHb39vL0Eclj0QzvKZs/vqjYX GEo7MBZz7N4BMEAN9MixD396RC8qOyvN00h0erazVJQQJla3Ym9elzhSSor+tEJ45/es Q1PkHp5NAdze65ytH+ElG+G0CORVJcK5LYsqAQdV9DtTMiyFHcQn2lkpVtfvqilHORyK 9Q== Received: from ediex01.ad.cirrus.com ([87.246.76.36]) by mx0a-001ae601.pphosted.com with ESMTP id 36ymc70eyv-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Fri, 05 Mar 2021 11:34:51 -0600 Received: from EDIEX01.ad.cirrus.com (198.61.84.80) by EDIEX01.ad.cirrus.com (198.61.84.80) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.2; Fri, 5 Mar 2021 17:34:49 +0000 Received: from ediswmail.ad.cirrus.com (198.61.86.93) by EDIEX01.ad.cirrus.com (198.61.84.80) with Microsoft SMTP Server id 15.1.2176.2 via Frontend Transport; Fri, 5 Mar 2021 17:34:49 +0000 Received: from mail1.cirrus.com (unknown [198.61.64.35]) by ediswmail.ad.cirrus.com (Postfix) with ESMTP id 17FA111CB; Fri, 5 Mar 2021 17:34:49 +0000 (UTC) From: Lucas Tanure To: James Schulman , David Rhodes , Liam Girdwood , Mark Brown , Jaroslav Kysela , Takashi Iwai CC: Richard Fitzgerald , , , , Lucas Tanure Subject: [PATCH v2 13/15] ASoC: cs42l42: Wait at least 150us after writing SCLK_PRESENT Date: Fri, 5 Mar 2021 17:34:40 +0000 Message-ID: <20210305173442.195740-14-tanureal@opensource.cirrus.com> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210305173442.195740-1-tanureal@opensource.cirrus.com> References: <20210305173442.195740-1-tanureal@opensource.cirrus.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxscore=0 clxscore=1015 suspectscore=0 adultscore=0 lowpriorityscore=0 malwarescore=0 phishscore=0 spamscore=0 priorityscore=1501 mlxlogscore=866 bulkscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2103050090 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Richard Fitzgerald There must be a delay of at least 150us after writing SCLK_PRESENT before issuing another I2C write. This is done using struct reg_sequence because it can specify a delay after the write and the whole sequence is written atomically. Signed-off-by: Richard Fitzgerald Signed-off-by: Lucas Tanure --- Changes in v2: - struct cs42l42_private add by this patch was wrong and moved to the correct patch - Lucas signed-off added sound/soc/codecs/cs42l42.c | 27 ++++++++++++++++++++++----- sound/soc/codecs/cs42l42.h | 1 + 2 files changed, 23 insertions(+), 5 deletions(-) diff --git a/sound/soc/codecs/cs42l42.c b/sound/soc/codecs/cs42l42.c index f0270de2ccb8a..4181765d99af7 100644 --- a/sound/soc/codecs/cs42l42.c +++ b/sound/soc/codecs/cs42l42.c @@ -549,6 +549,24 @@ static const struct snd_soc_component_driver soc_component_dev_cs42l42 = { .non_legacy_dai_naming = 1, }; +/* Switch to SCLK. Atomic delay after the write to allow the switch to complete. */ +static const struct reg_sequence cs42l42_to_sclk_seq[] = { + { + .reg = CS42L42_OSC_SWITCH, + .def = CS42L42_SCLK_PRESENT_MASK, + .delay_us = CS42L42_CLOCK_SWITCH_DELAY_US, + }, +}; + +/* Switch to OSC. Atomic delay after the write to allow the switch to complete. */ +static const struct reg_sequence cs42l42_to_osc_seq[] = { + { + .reg = CS42L42_OSC_SWITCH, + .def = 0, + .delay_us = CS42L42_CLOCK_SWITCH_DELAY_US, + }, +}; + struct cs42l42_pll_params { u32 sclk; u8 mclk_div; @@ -861,8 +879,8 @@ static int cs42l42_mute_stream(struct snd_soc_dai *dai, int mute, int stream) * SCLK must remain running until after this clock switch. * Without a source of clock the I2C bus doesn't work. */ - snd_soc_component_update_bits(component, CS42L42_OSC_SWITCH, - CS42L42_SCLK_PRESENT_MASK, 0); + regmap_multi_reg_write(cs42l42->regmap, cs42l42_to_osc_seq, + ARRAY_SIZE(cs42l42_to_osc_seq)); snd_soc_component_update_bits(component, CS42L42_PLL_CTL1, CS42L42_PLL_START_MASK, 0); } @@ -873,9 +891,8 @@ static int cs42l42_mute_stream(struct snd_soc_dai *dai, int mute, int stream) CS42L42_PLL_START_MASK, 1); /* Mark SCLK as present, turn off internal oscillator */ - snd_soc_component_update_bits(component, CS42L42_OSC_SWITCH, - CS42L42_SCLK_PRESENT_MASK, - CS42L42_SCLK_PRESENT_MASK); + regmap_multi_reg_write(cs42l42->regmap, cs42l42_to_sclk_seq, + ARRAY_SIZE(cs42l42_to_sclk_seq)); } cs42l42->stream_use |= 1 << stream; diff --git a/sound/soc/codecs/cs42l42.h b/sound/soc/codecs/cs42l42.h index 429c6833fc811..214cee762709d 100644 --- a/sound/soc/codecs/cs42l42.h +++ b/sound/soc/codecs/cs42l42.h @@ -755,6 +755,7 @@ #define CS42L42_NUM_SUPPLIES 5 #define CS42L42_BOOT_TIME_US 3000 +#define CS42L42_CLOCK_SWITCH_DELAY_US 150 static const char *const cs42l42_supply_names[CS42L42_NUM_SUPPLIES] = { "VA", -- 2.30.1