Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Fri, 29 Jul 2022 10:12:07 +0200
From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     Daniil Lunev <dlunev@chromium.org>
Cc:     Adrian Hunter <adrian.hunter@intel.com>,
        Bart Van Assche <bvanassche@acm.org>,
        Alim Akhtar <alim.akhtar@samsung.com>,
        Avri Altman <avri.altman@wdc.com>,
        Bean Huo <beanhuo@micron.com>, Can Guo <cang@codeaurora.org>,
        Daejun Park <daejun7.park@samsung.com>,
        "James E.J. Bottomley" <jejb@linux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@oracle.com>,
        Mauro Carvalho Chehab <mchehab+huawei@kernel.org>,
        Sohaib Mohamed <sohaib.amhmd@gmail.com>,
        linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org
Subject: Re: [PATCH v3 2/2] ufs: core: print UFSHCD capabilities in
 controller's sysfs node
Message-ID: <YuOWV5uLVV2JYP1c@kroah.com>
References: <20220729020508.4147751-1-dlunev@chromium.org>
 <20220729120216.v3.2.Ibf9efc9be50783eeee55befa2270b7d38552354c@changeid>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20220729120216.v3.2.Ibf9efc9be50783eeee55befa2270b7d38552354c@changeid>
Precedence: bulk

On Fri, Jul 29, 2022 at 12:05:08PM +1000, Daniil Lunev wrote:
> Allows userspace to check if Clock Scaling, Write Booster and Inline
> Crypto Engine functionality can be enabled.
> 
> Signed-off-by: Daniil Lunev <dlunev@chromium.org>
> 
> ---
> 
> Changes in v3:
> * Expose each capability individually.
> * Update documentation to represent new scheme.
> 
> Changes in v2:
> * Add documentation entry for the new sysfs node.
> 
>  Documentation/ABI/testing/sysfs-driver-ufs | 39 ++++++++++++++++++++
>  drivers/ufs/core/ufs-sysfs.c               | 41 ++++++++++++++++++++++
>  2 files changed, 80 insertions(+)
> 
> diff --git a/Documentation/ABI/testing/sysfs-driver-ufs b/Documentation/ABI/testing/sysfs-driver-ufs
> index 6b248abb1bd71..805d76f7d7aef 100644
> --- a/Documentation/ABI/testing/sysfs-driver-ufs
> +++ b/Documentation/ABI/testing/sysfs-driver-ufs
> @@ -1591,6 +1591,45 @@ Description:	This entry shows the status of HPB.
>  
>  		The file is read only.
>  
> +What:		/sys/bus/platform/drivers/ufshcd/*/capabilities/clock_scaling

This shouldn't be linked to as a driver file, it's a device file.  So no
need for this line.

> +What:		/sys/bus/platform/devices/*.ufs/capabilities/clock_scaling

Since when are all ufs devices platform devices?  Do we not have UFS
controllers on other types of busses?

thanks,

greg k-h