From patchwork Fri Aug 14 01:43:46 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?V2VuYmluIE1laSAo5qKF5paH5b2sKQ==?= X-Patchwork-Id: 11713285 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 106CB138C for ; Fri, 14 Aug 2020 01:45:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EABDA22B49 for ; Fri, 14 Aug 2020 01:45:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="WBlGYSJP" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726697AbgHNBo4 (ORCPT ); Thu, 13 Aug 2020 21:44:56 -0400 Received: from mailgw02.mediatek.com ([210.61.82.184]:60327 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1726681AbgHNBoy (ORCPT ); Thu, 13 Aug 2020 21:44:54 -0400 X-UUID: 372feafcc8cf43b4a9cda9f9ab1202a5-20200814 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Transfer-Encoding:Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=VFjE0n0yP6rYccsrd1vDlg8jm85JSl2DOXPzRxPAWrs=; b=WBlGYSJPB3dX2DcMkh83kUpq6aw52KxoBRhG1jKfnr7DbTYhaA8GR9bbt/3oG1CRLWpep+AE0CSThoA9jv+x8+hCfkiP7ewhU5rUnPLIicdZ9joD5uN0pEarwzaxwGZuuk/UIDaVnKw2v72J44DtB0UcTOcoDLRh19038578zSo=; X-UUID: 372feafcc8cf43b4a9cda9f9ab1202a5-20200814 Received: from mtkcas11.mediatek.inc [(172.21.101.40)] by mailgw02.mediatek.com (envelope-from ) (Cellopoint E-mail Firewall v4.1.10 Build 0809 with TLS) with ESMTP id 579499826; Fri, 14 Aug 2020 09:44:50 +0800 Received: from mtkcas08.mediatek.inc (172.21.101.126) by mtkmbs07n1.mediatek.inc (172.21.101.16) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 14 Aug 2020 09:44:48 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkcas08.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Fri, 14 Aug 2020 09:44:47 +0800 From: Wenbin Mei To: Ulf Hansson , Rob Herring CC: Chaotian Jing , Matthias Brugger , Philipp Zabel , , , , , , , Wenbin Mei , Subject: [v5,3/3] mmc: mediatek: add optional module reset property Date: Fri, 14 Aug 2020 09:43:46 +0800 Message-ID: <20200814014346.6496-4-wenbin.mei@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20200814014346.6496-1-wenbin.mei@mediatek.com> References: <20200814014346.6496-1-wenbin.mei@mediatek.com> MIME-Version: 1.0 X-MTK: N Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org This patch fixs eMMC-Access on mt7622/Bpi-64. Before we got these Errors on mounting eMMC ion R64: [ 48.664925] blk_update_request: I/O error, dev mmcblk0, sector 204800 op 0x1:(WRITE) flags 0x800 phys_seg 1 prio class 0 [ 48.676019] Buffer I/O error on dev mmcblk0p1, logical block 0, lost sync page write This patch adds a optional reset management for msdc. Sometimes the bootloader does not bring msdc register to default state, so need reset the msdc controller. Cc: # v5.4+ Fixes: 966580ad236e ("mmc: mediatek: add support for MT7622 SoC") Signed-off-by: Wenbin Mei Reviewed-by: Philipp Zabel Tested-by: Frank Wunderlich --- drivers/mmc/host/mtk-sd.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c index 39e7fc54c438..fc97d5bf3a20 100644 --- a/drivers/mmc/host/mtk-sd.c +++ b/drivers/mmc/host/mtk-sd.c @@ -22,6 +22,7 @@ #include #include #include +#include #include #include @@ -434,6 +435,7 @@ struct msdc_host { struct msdc_save_para save_para; /* used when gate HCLK */ struct msdc_tune_para def_tune_para; /* default tune setting */ struct msdc_tune_para saved_tune_para; /* tune result of CMD21/CMD19 */ + struct reset_control *reset; }; static const struct mtk_mmc_compatible mt8135_compat = { @@ -1516,6 +1518,12 @@ static void msdc_init_hw(struct msdc_host *host) u32 val; u32 tune_reg = host->dev_comp->pad_tune_reg; + if (host->reset) { + reset_control_assert(host->reset); + usleep_range(10, 50); + reset_control_deassert(host->reset); + } + /* Configure to MMC/SD mode, clock free running */ sdr_set_bits(host->base + MSDC_CFG, MSDC_CFG_MODE | MSDC_CFG_CKPDN); @@ -2273,6 +2281,11 @@ static int msdc_drv_probe(struct platform_device *pdev) if (IS_ERR(host->src_clk_cg)) host->src_clk_cg = NULL; + host->reset = devm_reset_control_get_optional_exclusive(&pdev->dev, + "hrst"); + if (IS_ERR(host->reset)) + return PTR_ERR(host->reset); + host->irq = platform_get_irq(pdev, 0); if (host->irq < 0) { ret = -EINVAL;