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Message-ID: <20200710135844.58d76d44@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com>
Date:   Fri, 10 Jul 2020 13:58:44 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     <min.li.xe@...esas.com>
Cc:     <richardcochran@...il.com>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net-next] ptp: add debugfs support for IDT family of
 timing devices

On Fri, 10 Jul 2020 11:41:25 -0400 min.li.xe@...esas.com wrote:
> From: Min Li <min.li.xe@...esas.com>
> 
> This patch is to add debugfs support for ptp_clockmatrix and ptp_idt82p33.
> It will create a debugfs directory called idtptp{x} and x is the ptp index.
> Three inerfaces are present, which are cmd, help and regs. help is read
> only and will display a brief help message. regs is read only amd will show
> all register values. cmd is write only and will accept certain commands.
> Currently, the accepted commands are combomode to set comobo mode and write
> to write up to 4 registers.
> 
> Signed-off-by: Min Li <min.li.xe@...esas.com>

No private configuration interfaces in debugfs, please.

If what you're exposing is a useful feature it deserves a proper 
uAPI interface.

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