From: Bean Huo <huobean@gmail.com>
To: alim.akhtar@samsung.com, avri.altman@wdc.com,
asutoshd@codeaurora.org, jejb@linux.ibm.com,
martin.petersen@oracle.com, stanley.chu@mediatek.com,
beanhuo@micron.com, bvanassche@acm.org, tomas.winkler@intel.com,
cang@codeaurora.org
Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v7 2/6] docs: ABI: Add wb_on documentation for new entry wb_on
Date: Tue, 19 Jan 2021 17:38:43 +0100 [thread overview]
Message-ID: <20210119163847.20165-3-huobean@gmail.com> (raw)
In-Reply-To: <20210119163847.20165-1-huobean@gmail.com>
From: Bean Huo <beanhuo@micron.com>
Adds UFS sysfs documentation for new entry wb_on.
Signed-off-by: Bean Huo <beanhuo@micron.com>
---
Documentation/ABI/testing/sysfs-driver-ufs | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-driver-ufs b/Documentation/ABI/testing/sysfs-driver-ufs
index adc0d0e91607..f756fd0eba19 100644
--- a/Documentation/ABI/testing/sysfs-driver-ufs
+++ b/Documentation/ABI/testing/sysfs-driver-ufs
@@ -1153,3 +1153,14 @@ Description: This entry shows the configured size of WriteBooster buffer.
0400h corresponds to 4GB.
The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/wb_on
+Date: January 2021
+Contact: Bean Huo <beanhuo@micron.com>
+Description: This node is used to set or display whether UFS WriteBooster is
+ enabled. Echo 0 to this file to disable UFS WriteBooster or 1 to enable
+ it. The WriteBooster is enabled after power-on/reset, however, it will
+ be disabled/enable while CLK scaling down/up (if the platform supports
+ UFSHCD_CAP_CLK_SCALING). For a platform that doesn't support
+ UFSHCD_CAP_CLK_SCALING, we can disable/enable WriteBooster through this
+ sysfs node.
--
2.17.1
next prev parent reply other threads:[~2021-01-19 18:28 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-19 16:38 [PATCH v7 0/6] Several changes for UFS WriteBooster Bean Huo
2021-01-19 16:38 ` [PATCH v7 1/6] scsi: ufs: Add "wb_on" sysfs node to control WB on/off Bean Huo
2021-01-19 16:38 ` Bean Huo [this message]
2021-01-19 16:38 ` [PATCH v7 3/6] scsi: ufs: Changes comment in the function ufshcd_wb_probe() Bean Huo
2021-01-19 16:38 ` [PATCH v7 4/6] scsi: ufs: Remove two WB related fields from struct ufs_dev_info Bean Huo
2021-01-19 16:38 ` [PATCH v7 5/6] scsi: ufs: Group UFS WB related flags to " Bean Huo
2021-01-19 16:38 ` [PATCH v7 6/6] scsi: ufs: Cleanup WB buffer flush toggle implementation Bean Huo
2021-01-21 3:15 ` [PATCH v7 0/6] Several changes for UFS WriteBooster Martin K. Petersen
2021-01-21 16:15 ` Bean Huo
2021-01-23 4:22 ` Martin K. Petersen
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