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[95.91.238.27]) by smtp.gmail.com with ESMTPSA id k22sm9589993eji.101.2021.01.19.08.39.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 19 Jan 2021 08:39:02 -0800 (PST) From: Bean Huo 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 Message-Id: <20210119163847.20165-3-huobean@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210119163847.20165-1-huobean@gmail.com> References: <20210119163847.20165-1-huobean@gmail.com> Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org From: Bean Huo Adds UFS sysfs documentation for new entry wb_on. Signed-off-by: Bean Huo --- 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 +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.