From patchwork Wed Mar 18 10:40:12 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stanley Chu X-Patchwork-Id: 11444931 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 198FC1820 for ; Wed, 18 Mar 2020 10:50:40 +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 EB9592076D for ; Wed, 18 Mar 2020 10:50:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="IqcA37es"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="hnwE2MXA" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org EB9592076D 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-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=TrfHsKPacuFk1j4FJdEV3TiavDyNhM7ocRRHsK+kw0A=; b=IqcA37esiCnW78 nmFXA+/LVFZVPww6gVgAzFqNuuqJoy18w73UUurrf1wMyR7TDVdCQToF4rllBZrPulIrNiiOBbjc6 lO+bcXZXZk/SkLxofIwdwsCv61VzLhzMzTbnUmpvancF0enIkNRjpcEkZkVSI/i8e0OYxNbzsPl6B R9u+vsrJqa1uvWihxEDjJUWjaQ/rvFrXnksKvfR88PjkFgDoxOjH4H97DgWMmzqiLMKTllhRrKKtz lZLV1O9fah0Hk4FcIU6Y3ZZifw390zsAjI2kwgGiLRzfBK7QeR7UrfC6Kx0+Ty+eLlbh9dH8JgEWL bwnRwqHReCjQQEKlJkjA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jEWHV-0005SZ-U6; Wed, 18 Mar 2020 10:50:37 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jEWHI-0005Ho-EB; Wed, 18 Mar 2020 10:50:25 +0000 X-UUID: 7ab0499d4cc348b481f193049294c1af-20200318 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=SujIfavt6nl6SADi9CBMgGUh+AUKfIUyar7ayBhr5XY=; b=hnwE2MXA4UEfCRWY13D2cI0XA8YR/yu3/Qrec5wkIN5G/3maN7eCirSbCIcnWppA2VXR1z0c1j5CbIWddRXHhrh1Ca2s5uqOskeka0izJ93QFtcVebH3l6qdDtWHwNyYY5+mqwRvD7uXhXvFsMSpXSdXblKsREMcgmb3gfRsuBc=; X-UUID: 7ab0499d4cc348b481f193049294c1af-20200318 Received: from mtkcas66.mediatek.inc [(172.29.193.44)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 1513692805; Wed, 18 Mar 2020 02:50:22 -0800 Received: from mtkmbs05n1.mediatek.inc (172.21.101.15) by MTKMBS62N1.mediatek.inc (172.29.193.41) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Wed, 18 Mar 2020 03:40:42 -0700 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs05n1.mediatek.inc (172.21.101.15) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Wed, 18 Mar 2020 18:39:00 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Wed, 18 Mar 2020 18:40:30 +0800 From: Stanley Chu To: , , , , , Subject: [PATCH v7 3/7] scsi: ufs: introduce common and flexible delay function Date: Wed, 18 Mar 2020 18:40:12 +0800 Message-ID: <20200318104016.28049-4-stanley.chu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20200318104016.28049-1-stanley.chu@mediatek.com> References: <20200318104016.28049-1-stanley.chu@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200318_035024_479059_A8234C09 X-CRM114-Status: UNSURE ( 8.30 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.3 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record 0.0 MIME_BASE64_TEXT RAW: Message text disguised using base64 encoding -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain 0.0 UNPARSEABLE_RELAY Informational: message has unparseable relay lines X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Stanley Chu , andy.teng@mediatek.com, chun-hung.wu@mediatek.com, kuohong.wang@mediatek.com, linux-kernel@vger.kernel.org, cang@codeaurora.org, linux-mediatek@lists.infradead.org, peter.wang@mediatek.com, matthias.bgg@gmail.com, beanhuo@micron.com, linux-arm-kernel@lists.infradead.org, asutoshd@codeaurora.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Introduce a common delay function to provide flexible way for users to take choices of udelay and usleep_range into consideration according to the required delay time. Signed-off-by: Stanley Chu Reviewed-by: Avri Altman Reviewed-by: Can Guo --- drivers/scsi/ufs/ufshcd.c | 12 ++++++++++++ drivers/scsi/ufs/ufshcd.h | 1 + 2 files changed, 13 insertions(+) diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 314e808b0d4e..a42a84164dec 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -597,6 +597,18 @@ static void ufshcd_print_pwr_info(struct ufs_hba *hba) hba->pwr_info.hs_rate); } +void ufshcd_delay_us(unsigned long us, unsigned long tolerance) +{ + if (!us) + return; + + if (us < 10) + udelay(us); + else + usleep_range(us, us + tolerance); +} +EXPORT_SYMBOL_GPL(ufshcd_delay_us); + /* * ufshcd_wait_for_register - wait for register value to change * @hba - per-adapter interface diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index 52425371082a..9a14ff3d5f8b 100644 --- a/drivers/scsi/ufs/ufshcd.h +++ b/drivers/scsi/ufs/ufshcd.h @@ -792,6 +792,7 @@ int ufshcd_init(struct ufs_hba * , void __iomem * , unsigned int); int ufshcd_make_hba_operational(struct ufs_hba *hba); void ufshcd_remove(struct ufs_hba *); int ufshcd_uic_hibern8_exit(struct ufs_hba *hba); +void ufshcd_delay_us(unsigned long us, unsigned long tolerance); int ufshcd_wait_for_register(struct ufs_hba *hba, u32 reg, u32 mask, u32 val, unsigned long interval_us, unsigned long timeout_ms, bool can_sleep);