From patchwork Fri Mar 4 13:51:34 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yann Gautier X-Patchwork-Id: 12769141 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 F0BA2C433EF for ; Fri, 4 Mar 2022 13:52:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235713AbiCDNx2 (ORCPT ); Fri, 4 Mar 2022 08:53:28 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38098 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231605AbiCDNx1 (ORCPT ); Fri, 4 Mar 2022 08:53:27 -0500 Received: from mx07-00178001.pphosted.com (mx08-00178001.pphosted.com [91.207.212.93]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7765F33EB9; Fri, 4 Mar 2022 05:52:37 -0800 (PST) Received: from pps.filterd (m0046660.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.16.1.2/8.16.1.2) with ESMTP id 224BrQTP011332; Fri, 4 Mar 2022 14:51:49 +0100 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foss.st.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding : content-type; s=selector1; bh=tbU0qOc6Ayx6hnhXQ94zwIDGkMujBZbQs9NbPVdBY5A=; b=xTD9vKiQCmfnFprZmglcB5VgO+UPllnPsraMHR7AjH/CQpzG459UvGxKnuppKF7l3phZ O5DrbC4o7iq/H/OHufsZQu25IFcemolPNTOK+y3iprzO4ek4r7m0kqOFSGZX5XYIjjAb AX4jJbPI9lpjQs0I9JEGu1LeMT3IddwRABqkJiMVBVNhnUCaUsnMQigYTy17CP/Mlvcr 1Go75TThmKHtS8jbmBRCVHJhmQjNMkx2rsHpujwkyYwZFISvdr/Y9kOshHoV/T8Jpp+v bGKh0kpEr7M1rx8PZ/g7guIEhZNtXz8V0waxHONJL24IYvNfBmpwj3GIza4raQAvZgi/ zQ== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com (PPS) with ESMTPS id 3ek4k5d52b-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 04 Mar 2022 14:51:49 +0100 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 59220100038; Fri, 4 Mar 2022 14:51:45 +0100 (CET) Received: from Webmail-eu.st.com (sfhdag2node2.st.com [10.75.127.5]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 2741C2291CC; Fri, 4 Mar 2022 14:51:45 +0100 (CET) Received: from localhost (10.75.127.45) by SFHDAG2NODE2.st.com (10.75.127.5) with Microsoft SMTP Server (TLS) id 15.0.1497.26; Fri, 4 Mar 2022 14:51:44 +0100 From: Yann Gautier To: Rob Herring , Ulf Hansson CC: , , , , , Alexandre Torgue , Christophe Kerello , Linus Walleij , Ludovic Barre , Maxime Coquelin , Philipp Zabel , Russell King , Marek Vasut , , Manivannan Sadhasivam , Grzegorz Szymaszek , Yann Gautier Subject: [PATCH 3/3] mmc: mmci: manage MMC_PM_KEEP_POWER per variant config Date: Fri, 4 Mar 2022 14:51:34 +0100 Message-ID: <20220304135134.47827-4-yann.gautier@foss.st.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220304135134.47827-1-yann.gautier@foss.st.com> References: <20220304135134.47827-1-yann.gautier@foss.st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.45] X-ClientProxiedBy: SFHDAG2NODE2.st.com (10.75.127.5) To SFHDAG2NODE2.st.com (10.75.127.5) X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.816,Hydra:6.0.425,FMLib:17.11.64.514 definitions=2022-03-04_06,2022-03-04_01,2022-02-23_01 Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org Add a disable_keep_power field in variant_data struct. The MMC_PM_KEEP_POWER flag will be enabled if disable_keep_power is not set. It is only set to true for stm32_sdmmc variants. The issue was seen on STM32MP157C-DK2 board, which embeds a wifi chip. It doesn't correctly support low power, and we need to unbind the wifi driver before a suspend sequence. But the wifi chip firmware is then lost, and the communication with SDIO fails if MMC_PM_KEEP_POWER is enabled. The flag can still be enabled through DT property: keep-power-in-suspend. Signed-off-by: Yann Gautier --- drivers/mmc/host/mmci.c | 5 ++++- drivers/mmc/host/mmci.h | 1 + 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c index 45b8608c935c..0e2f2f5d6a52 100644 --- a/drivers/mmc/host/mmci.c +++ b/drivers/mmc/host/mmci.c @@ -274,6 +274,7 @@ static struct variant_data variant_stm32_sdmmc = { .busy_detect = true, .busy_detect_flag = MCI_STM32_BUSYD0, .busy_detect_mask = MCI_STM32_BUSYD0ENDMASK, + .disable_keep_power = true, .init = sdmmc_variant_init, }; @@ -301,6 +302,7 @@ static struct variant_data variant_stm32_sdmmcv2 = { .busy_detect = true, .busy_detect_flag = MCI_STM32_BUSYD0, .busy_detect_mask = MCI_STM32_BUSYD0ENDMASK, + .disable_keep_power = true, .init = sdmmc_variant_init, }; @@ -2172,7 +2174,8 @@ static int mmci_probe(struct amba_device *dev, host->stop_abort.flags = MMC_RSP_R1B | MMC_CMD_AC; /* We support these PM capabilities. */ - mmc->pm_caps |= MMC_PM_KEEP_POWER; + if (!variant->disable_keep_power) + mmc->pm_caps |= MMC_PM_KEEP_POWER; /* * We can do SGIO diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h index e1a9b96a3396..2cad1ef9766a 100644 --- a/drivers/mmc/host/mmci.h +++ b/drivers/mmc/host/mmci.h @@ -361,6 +361,7 @@ struct variant_data { u32 opendrain; u8 dma_lli:1; u32 stm32_idmabsize_mask; + u8 disable_keep_power:1; void (*init)(struct mmci_host *host); };