Date: Wed, 30 Nov 2016 10:56:32 +0100
From: Richard Cochran <richardcochran@gmail.com>
To: Grygorii Strashko <grygorii.strashko@ti.com>
Cc: "David S. Miller" <davem@davemloft.net>, netdev@vger.kernel.org,
        Mugunthan V N <mugunthanvnm@ti.com>, Sekhar Nori <nsekhar@ti.com>,
        linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org,
        Rob Herring <robh+dt@kernel.org>, devicetree@vger.kernel.org,
        Murali Karicheri <m-karicheri2@ti.com>, Wingman Kwok <w-kwok2@ti.com>
Subject: Re: [PATCH 2/6] net: ethernet: ti: cpts: add support for ext rftclk
 selection
Message-ID: <20161130095632.GC28680@localhost.localdomain>
References: <20161128230428.6872-1-grygorii.strashko@ti.com>
 <20161128230428.6872-3-grygorii.strashko@ti.com>
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On Mon, Nov 28, 2016 at 05:04:24PM -0600, Grygorii Strashko wrote:
> Some CPTS instances, which can be found on KeyStone 2 1/10G Ethernet
> Switch Subsystems, can control an external multiplexer that selects
> one of up to 32 clocks for time sync reference (RFTCLK). This feature
> can be configured through CPTS_RFTCLK_SEL register (offset: x08).
> 
> Hence, introduce optional DT cpts_rftclk_sel poperty wich, if present,
> will specify CPTS reference clock. The cpts_rftclk_sel should be
> omitted in DT if HW doesn't support this feature. The external fixed
> rate clocks can be defined in board files as "fixed-clock".

Can't you implement this using the clock tree, rather than an ad-hoc
DT property?

Thanks,
Richard