From patchwork Wed Jan 13 10:57:23 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ricky WU X-Patchwork-Id: 12016471 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, 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 C9D3FC433DB for ; Wed, 13 Jan 2021 10:58:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6418423159 for ; Wed, 13 Jan 2021 10:58:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726273AbhAMK6R (ORCPT ); Wed, 13 Jan 2021 05:58:17 -0500 Received: from rtits2.realtek.com ([211.75.126.72]:55578 "EHLO rtits2.realtek.com.tw" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726459AbhAMK6R (ORCPT ); Wed, 13 Jan 2021 05:58:17 -0500 Authenticated-By: X-SpamFilter-By: ArmorX SpamTrap 5.73 with qID 10DAvSccD028238, This message is accepted by code: ctloc85258 Received: from mail.realtek.com (rtexmbs01.realtek.com.tw[172.21.6.94]) by rtits2.realtek.com.tw (8.15.2/2.70/5.88) with ESMTPS id 10DAvSccD028238 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Wed, 13 Jan 2021 18:57:28 +0800 Received: from localhost (172.22.88.222) by RTEXMBS01.realtek.com.tw (172.21.6.94) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2106.2; Wed, 13 Jan 2021 18:57:28 +0800 From: To: , , , , , , , Subject: [PATCH 1/2] mmc: rtsx: add delay before power on Date: Wed, 13 Jan 2021 18:57:23 +0800 Message-ID: <20210113105723.7916-1-ricky_wu@realtek.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-Originating-IP: [172.22.88.222] X-ClientProxiedBy: RTEXMBS02.realtek.com.tw (172.21.6.95) To RTEXMBS01.realtek.com.tw (172.21.6.94) Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org From: Ricky Wu Make sure voltage below 0.5V before power on when do power cycle At mmc-core recognition card phase will do power cycle quickly so our device need at least 100ms to make voltage down to below 0.5V Signed-off-by: Ricky Wu --- drivers/mmc/host/rtsx_pci_sdmmc.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/mmc/host/rtsx_pci_sdmmc.c b/drivers/mmc/host/rtsx_pci_sdmmc.c index e6f5bbce5685..0e5043a03965 100644 --- a/drivers/mmc/host/rtsx_pci_sdmmc.c +++ b/drivers/mmc/host/rtsx_pci_sdmmc.c @@ -906,6 +906,8 @@ static int sd_power_on(struct realtek_pci_sdmmc *host) if (host->power_state == SDMMC_POWER_ON) return 0; + msleep(100); + rtsx_pci_init_cmd(pcr); rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_SELECT, 0x07, SD_MOD_SEL); rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_SHARE_MODE,