From: Stanley Chu <stanley.chu@mediatek.com>
To: <linux-scsi@vger.kernel.org>, <martin.petersen@oracle.com>,
<avri.altman@wdc.com>, <alim.akhtar@samsung.com>,
<pedrom.sousa@synopsys.com>, <jejb@linux.ibm.com>,
<matthias.bgg@gmail.com>, <bvanassche@acm.org>,
<f.fainelli@gmail.com>
Cc: <beanhuo@micron.com>, <cang@codeaurora.org>,
<linux-mediatek@lists.infradead.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <kuohong.wang@mediatek.com>,
<peter.wang@mediatek.com>, <chun-hung.wu@mediatek.com>,
<andy.teng@mediatek.com>, <leon.chen@mediatek.com>,
Stanley Chu <stanley.chu@mediatek.com>
Subject: [PATCH v2 6/6] scsi: ufs-mediatek: configure and enable clk-gating
Date: Mon, 30 Dec 2019 13:32:30 +0800 [thread overview]
Message-ID: <1577683950-1702-7-git-send-email-stanley.chu@mediatek.com> (raw)
In-Reply-To: <1577683950-1702-1-git-send-email-stanley.chu@mediatek.com>
Enable clk-gating with customized delayed timer value in
MediaTek Chipsets.
Cc: Alim Akhtar <alim.akhtar@samsung.com>
Cc: Avri Altman <avri.altman@wdc.com>
Cc: Bart Van Assche <bvanassche@acm.org>
Cc: Bean Huo <beanhuo@micron.com>
Cc: Can Guo <cang@codeaurora.org>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
---
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 1f025723b61b..41f80eeada46 100644
--- a/drivers/scsi/ufs/ufs-mediatek.c
+++ b/drivers/scsi/ufs/ufs-mediatek.c
@@ -210,6 +210,9 @@ 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
@@ -298,6 +301,23 @@ 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 */
@@ -313,6 +333,8 @@ 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
next prev parent reply other threads:[~2019-12-30 5:33 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-30 5:32 [PATCH v2 0/6] scsi: ufs: add MediaTek vendor implementations Stanley Chu
2019-12-30 5:32 ` [PATCH v2 1/6] soc: mediatek: add header for SiP service interface Stanley Chu
2019-12-30 5:32 ` [PATCH v2 2/6] scsi: ufs-mediatek: add device reset implementation Stanley Chu
2019-12-30 5:32 ` [PATCH v2 3/6] scsi: ufs-mediatek: introduce reference clock control Stanley Chu
2019-12-30 5:32 ` [PATCH v2 4/6] scsi: ufs: export ufshcd_auto_hibern8_update for vendor usage Stanley Chu
2019-12-30 5:32 ` [PATCH v2 5/6] scsi: ufs-mediatek: configure customized auto-hibern8 timer Stanley Chu
2019-12-30 5:32 ` Stanley Chu [this message]
2020-01-03 2:59 ` [PATCH v2 0/6] scsi: ufs: add MediaTek vendor implementations Martin K. Petersen
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1577683950-1702-7-git-send-email-stanley.chu@mediatek.com \
--to=stanley.chu@mediatek.com \
--cc=alim.akhtar@samsung.com \
--cc=andy.teng@mediatek.com \
--cc=avri.altman@wdc.com \
--cc=beanhuo@micron.com \
--cc=bvanassche@acm.org \
--cc=cang@codeaurora.org \
--cc=chun-hung.wu@mediatek.com \
--cc=f.fainelli@gmail.com \
--cc=jejb@linux.ibm.com \
--cc=kuohong.wang@mediatek.com \
--cc=leon.chen@mediatek.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mediatek@lists.infradead.org \
--cc=linux-scsi@vger.kernel.org \
--cc=martin.petersen@oracle.com \
--cc=matthias.bgg@gmail.com \
--cc=pedrom.sousa@synopsys.com \
--cc=peter.wang@mediatek.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).