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[209.132.180.67]) by mx.google.com with ESMTP id i140si3721550oib.90.2019.12.19.10.34.37; Thu, 19 Dec 2019 10:34:49 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=FkJK2kMX; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727016AbfLSSdo (ORCPT + 99 others); Thu, 19 Dec 2019 13:33:44 -0500 Received: from mail-vk1-f194.google.com ([209.85.221.194]:37962 "EHLO mail-vk1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726858AbfLSSdo (ORCPT ); Thu, 19 Dec 2019 13:33:44 -0500 Received: by mail-vk1-f194.google.com with SMTP id d17so1907638vke.5; Thu, 19 Dec 2019 10:33:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=Ml4mAJAjd+UzALjuvInIbq2ljDjbxyxCZlmTfZ9UxCk=; b=FkJK2kMXU/9fnYvBIr1pmuDBc/Q4Sb9TKnfUaJQ1oGe4RNu9T/nhYd4+rUNAmtJyvv 8Q2KMCV8W5KOW3EqmHVLyLsU2HGFdKykwecFg/lDk4PIhR+U0jWK61TeH0Fh5w4S+UTl vZcLbPi306O1yUfb/1DudDZsFoHN7K9Ad6Jivgm5IjuxpJNLGsMUokzNv2e1gNtmORX3 w1HfECY+fFGnurtud2eXIApj668AfEunCX9Ulm/vVb59FhI5uYFQnvtn+5fgZrJNICwP 104Vfo66LHfLmpTygUCT0XLGtVbGeds4qm27YjzLyEA41/YL2LrmwuctfqITBeB7jRWK U9pQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=Ml4mAJAjd+UzALjuvInIbq2ljDjbxyxCZlmTfZ9UxCk=; b=d8XhkVTrHBZjcRu5JUmAo/edBE6t9PGwoJB3qvXOui63GUAfVYqzxipFEu9ru8YfwP Db4ftfIHdXMUIfILzpT//Ime2LL1qxDLpV+Ie0R7iIj+SCyQ95SkMnQBv5yOfMhW0LHN gt4MaWbpqCXsmjbb/v6s6jIIUmUKNVlpi0JfnFoq0WAA279dpPG5TAwMAHze0HkoDzYh P799FwkC2uNJFZIkvKypskzZ4oitPTTm4XL0eX4QxqIcsABbFo8So+BWbjYih33CGfK8 xZn6shqlVAqqy/I6RpRnq+7UtH8yQTwyys01TET/1fV4lDlvF24OHQPARoCRb7NKxuNC F+4g== X-Gm-Message-State: APjAAAWfXAolkweTnz6hLTjROsBPCzueR3bYmqIiw8UM98APcL7u38vZ MijCe6dXtEVpo7sRzLhjwZ31yayqsyxS2tfoXW4= X-Received: by 2002:a1f:db81:: with SMTP id s123mr7008579vkg.45.1576780423321; Thu, 19 Dec 2019 10:33:43 -0800 (PST) MIME-Version: 1.0 References: <1576224695-22657-1-git-send-email-stanley.chu@mediatek.com> <1576224695-22657-5-git-send-email-stanley.chu@mediatek.com> In-Reply-To: <1576224695-22657-5-git-send-email-stanley.chu@mediatek.com> From: Alim Akhtar Date: Fri, 20 Dec 2019 00:03:07 +0530 Message-ID: Subject: Re: [PATCH v1 4/4] scsi: ufs-mediatek: configure and enable clk-gating To: Stanley Chu Cc: linux-scsi@vger.kernel.org, "Martin K. Petersen" , Avri Altman , Alim Akhtar , "James E.J. Bottomley" , Matthias Brugger , linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org, open list , "Bean Huo (beanhuo)" , Kuohong Wang , peter.wang@mediatek.com, chun-hung.wu@mediatek.com, andy.teng@mediatek.com Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Dec 13, 2019 at 2:42 PM Stanley Chu wrote: > > Enable clk-gating with customized delayed timer value in > MediaTek Chipsets. > > Signed-off-by: Stanley Chu Reviewed-by: Alim Akhtar > --- > drivers/scsi/ufs/ufs-mediatek.c | 22 ++++++++++++++++++++++ > 1 file changed, 22 insertions(+) > > diff --git a/drivers/scsi/ufs/ufs-mediatek.c b/drivers/scsi/ufs/ufs-mediatek.c > index 71e2e0e4ea11..282ad06ec846 100644 > --- a/drivers/scsi/ufs/ufs-mediatek.c > +++ b/drivers/scsi/ufs/ufs-mediatek.c > @@ -205,6 +205,9 @@ static int ufs_mtk_init(struct ufs_hba *hba) > /* Enable runtime autosuspend */ > hba->caps |= UFSHCD_CAP_RPM_AUTOSUSPEND; > > + /* Enable clock-gating */ > + hba->caps |= UFSHCD_CAP_CLK_GATING; > + > /* > * ufshcd_vops_init() is invoked after > * ufshcd_setup_clock(true) in ufshcd_hba_init() thus > @@ -293,6 +296,23 @@ static int ufs_mtk_pre_link(struct ufs_hba *hba) > return ret; > } > > +static void ufs_mtk_setup_clk_gating(struct ufs_hba *hba) > +{ > + unsigned long flags; > + u32 ah_ms; > + > + if (ufshcd_is_clkgating_allowed(hba)) { > + if (ufshcd_is_auto_hibern8_supported(hba) && hba->ahit) > + ah_ms = FIELD_GET(UFSHCI_AHIBERN8_TIMER_MASK, > + hba->ahit); > + else > + ah_ms = 10; > + spin_lock_irqsave(hba->host->host_lock, flags); > + hba->clk_gating.delay_ms = ah_ms + 5; > + spin_unlock_irqrestore(hba->host->host_lock, flags); > + } > +} > + > static int ufs_mtk_post_link(struct ufs_hba *hba) > { > /* disable device LCC */ > @@ -308,6 +328,8 @@ static int ufs_mtk_post_link(struct ufs_hba *hba) > FIELD_PREP(UFSHCI_AHIBERN8_SCALE_MASK, 3)); > } > > + ufs_mtk_setup_clk_gating(hba); > + > return 0; > } > > -- > 2.18.0 -- Regards, Alim