From: Bean Huo Date: Tue, 19 Jan 2021 16:38:43 +0000 (+0100) Subject: scsi: ufs: docs: ABI: Add wb_on documentation for new entry wb_on X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=06aea26676a584d0effa72ce6a21b21de7643b30;p=linux.git scsi: ufs: docs: ABI: Add wb_on documentation for new entry wb_on Adds UFS sysfs documentation for new entry wb_on. [mkp: fix doc formatting] Link: https://lore.kernel.org/r/20210119163847.20165-3-huobean@gmail.com Signed-off-by: Bean Huo Signed-off-by: Martin K. Petersen fix format --- diff --git a/Documentation/ABI/testing/sysfs-driver-ufs b/Documentation/ABI/testing/sysfs-driver-ufs index adc0d0e916078..375a10f159b11 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 +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.