From: Bean Huo <beanhuo@xxxxxxxxxx> Adds UFS sysfs documentation for new entry wb_on. Signed-off-by: Bean Huo <beanhuo@xxxxxxxxxx> --- 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@xxxxxxxxxx> +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
