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Date:   Wed, 16 Dec 2020 00:05:14 +0100
From:   Bean Huo <>
Subject: [PATCH v5 2/7] docs: ABI: Add wb_on documentation for UFS sysfs

From: Bean Huo <>

Adds UFS sysfs documentation for new entry wb_on.

Signed-off-by: Bean Huo <>
 Documentation/ABI/testing/sysfs-driver-ufs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-driver-ufs b/Documentation/ABI/testing/sysfs-driver-ufs
index d1a352194d2e..5a70d541b2f2 100644
--- a/Documentation/ABI/testing/sysfs-driver-ufs
+++ b/Documentation/ABI/testing/sysfs-driver-ufs
@@ -1019,3 +1019,11 @@ Contact:	Asutosh Das <>
 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:		December 2020
+Contact:	Bean Huo <>
+Description:	This sets or displays whether UFS WriteBooster is enabled. Echo
+        0 into this file to disable UFS WriteBooster or 1 to enable it. Note,
+        this is only allowed for the platform doesen't support

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