From: Bean Huo <bean...@micron.com>
Adds UFS sysfs documentation for new entry wb_on.
Signed-off-by: Bean Huo <bean...@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 <bean...@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
