linux-kernel - Re: [PATCH v5] ufs: core: print UFSHCD capabilities in controller's sysfs node

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Message-ID: <c4acb34f-7bba-336f-ddfc-a9c098f2c95f@acm.org>
Date:   Mon, 1 Aug 2022 19:38:31 -0700
From:   Bart Van Assche <bvanassche@....org>
To:     Daniil Lunev <dlunev@...omium.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Alim Akhtar <alim.akhtar@...sung.com>,
        Avri Altman <avri.altman@....com>,
        Bean Huo <beanhuo@...ron.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        Keoseong Park <keosung.park@...sung.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        Sohaib Mohamed <sohaib.amhmd@...il.com>,
        linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org
Subject: Re: [PATCH v5] ufs: core: print UFSHCD capabilities in controller's
 sysfs node

On 8/1/22 17:37, Daniil Lunev wrote:
> +What:		/sys/bus/platform/drivers/ufshcd/*/capabilities/write_booster
> +What:		/sys/bus/platform/devices/*.ufs/capabilities/write_booster
> +Date:		July 2022
> +Contact:	Daniil Lunev <dlunev@...omium.org>
> +Description:	Indicates status of Write Booster.
> +
> +		== ============================
> +		0  Write Booster can not be enabled.
> +		1  Write Booster can be enabled.
> +		== ============================
> +
> +		The file is read only.
Is the "capabilities" directory a directory with capabilities of the 
host, with capabilities of the UFS device or perhaps with capabilities 
of both?

Thanks,

Bart.