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=-17.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 2F115C47080 for ; Wed, 2 Jun 2021 02:42:35 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id E09C9613C1 for ; Wed, 2 Jun 2021 02:42:34 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E09C9613C1 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:CC :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=FpO2eI5Xoaks4qEml4rD8/Mhkih329nnqn/kVMOqs8o=; b=CqKbxIYwS1n+sd eVBf7bZX2xI1eXsn4Lq3WNfoPwy3GcV2CTovjvR5vUY+KUSEvyDkoCHOmYt5lx32C8AP3bHceJDHJ yX139Ou4WZi2Wub1cUrHCRkyDqkcSnDBrTpyNNegYWXDlJRdvep94PBC4De3Gu4qnvBrAi8HqxeiK yyt5nym03zJbVxbwFZLZT3Dy91VPY2Yt+zHtXFzKqM5s9fv7drpa/3t/NaukAQY+aCg+olRnBP7d5 K1qX6ytcFW+rRcwvoHyPq7zyX9gbrLcPV7Eb08qN5t8JSlU6IU9Rgm2TC7sve1bpmX+UfuTkRWVHs 69auodAED7OL6eOK58eg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1loGps-001e9e-9R; Wed, 02 Jun 2021 02:42:24 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1loGpn-001e95-F2 for linux-mediatek@lists.infradead.org; Wed, 02 Jun 2021 02:42:22 +0000 X-UUID: 243e45615d004f29a558daa2e52c4aa1-20210601 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:Message-ID:Date:Subject:CC:To:From; bh=LNZzoFsHA2pR66KpYJjaklg2wSffM/fe9dcYEvMAcDg=; b=fzzfgxJOhEfZEpzZ9F+kG8zdugLHxMBCbv+3hSSHeh04aOE28PhJXEd/yG4n1e6n4vmIbBU2HdnFgsRQ1wtmk9xRfuyrhz2cWZo0VPoBB6TF7V7m8haRhXEA+ejA5o79O0NgtuYY2w9so3rj2LEB/ML/dQ1MMWJIdJGWBN0513o=; X-UUID: 243e45615d004f29a558daa2e52c4aa1-20210601 Received: from mtkcas68.mediatek.inc [(172.29.94.19)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 717071458; Tue, 01 Jun 2021 19:42:14 -0700 Received: from MTKMBS02N1.mediatek.inc (172.21.101.77) by MTKMBS62N1.mediatek.inc (172.29.193.41) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 1 Jun 2021 19:42:13 -0700 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs02n1.mediatek.inc (172.21.101.77) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 2 Jun 2021 10:42:05 +0800 Received: from mtkswgap22.mediatek.inc (172.21.77.33) by mtkcas07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 2 Jun 2021 10:42:05 +0800 From: To: , , , , , CC: , , , , , , , Subject: [PATCH v2] scsi: ufs-mediatek: create device link of reset control Date: Wed, 2 Jun 2021 10:42:00 +0800 Message-ID: <1622601720-22466-1-git-send-email-peter.wang@mediatek.com> X-Mailer: git-send-email 1.7.9.5 MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210601_194221_080631_95EDCE72 X-CRM114-Status: GOOD ( 14.30 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org From: Peter Wang Mediatek UFS reset function is relied on Reset Control provided by reset-ti-syscon. To make Reset Control work properly, select reset-ti-syscon to ensure it being built with ufs-mediatek together. In addition, establish device link to wait until reset-ti-syscon initialization is done during UFS probing flow. Signed-off-by: Peter Wang --- drivers/scsi/ufs/Kconfig | 1 + drivers/scsi/ufs/ufs-mediatek.c | 29 +++++++++++++++++++++++++++++ 2 files changed, 30 insertions(+) diff --git a/drivers/scsi/ufs/Kconfig b/drivers/scsi/ufs/Kconfig index 07cf415..2d13795 100644 --- a/drivers/scsi/ufs/Kconfig +++ b/drivers/scsi/ufs/Kconfig @@ -115,6 +115,7 @@ config SCSI_UFS_MEDIATEK tristate "Mediatek specific hooks to UFS controller platform driver" depends on SCSI_UFSHCD_PLATFORM && ARCH_MEDIATEK select PHY_MTK_UFS + select RESET_TI_SYSCON help This selects the Mediatek specific additions to UFSHCD platform driver. UFS host on Mediatek needs some vendor specific configuration before diff --git a/drivers/scsi/ufs/ufs-mediatek.c b/drivers/scsi/ufs/ufs-mediatek.c index a981f26..d27e65e 100644 --- a/drivers/scsi/ufs/ufs-mediatek.c +++ b/drivers/scsi/ufs/ufs-mediatek.c @@ -1067,9 +1067,38 @@ static int ufs_mtk_probe(struct platform_device *pdev) { int err; struct device *dev = &pdev->dev; + struct device_node *reset_node; + struct platform_device *reset_pdev; + struct device_link *link; + + reset_node = of_find_compatible_node(NULL, NULL, + "ti,syscon-reset"); + if (!reset_node) { + dev_notice(dev, "find ti,syscon-reset fail\n"); + goto skip_reset; + } + reset_pdev = of_find_device_by_node(reset_node); + if (!reset_pdev) { + dev_notice(dev, "find reset_pdev fail\n"); + goto skip_reset; + } + link = device_link_add(dev, &reset_pdev->dev, + DL_FLAG_AUTOPROBE_CONSUMER); + if (!link) { + dev_notice(dev, "add reset device_link fail\n"); + goto skip_reset; + } + /* supplier is not probed */ + if (link->status == DL_STATE_DORMANT) { + err = -EPROBE_DEFER; + goto out; + } +skip_reset: /* perform generic probe */ err = ufshcd_pltfrm_init(pdev, &ufs_hba_mtk_vops); + +out: if (err) dev_info(dev, "probe failed %d\n", err); -- 1.7.9.5 _______________________________________________ Linux-mediatek mailing list Linux-mediatek@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-mediatek