netdev - Re: [PATCH V12 4/4] ptp: Added a clock driver for the National Semiconductor PHYTER.

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Date:	Wed, 23 Mar 2011 14:46:25 -0700
From:	John Stultz <john.stultz@...aro.org>
To:	Richard Cochran <richardcochran@...il.com>
Cc:	linux-kernel@...r.kernel.org, linux-api@...r.kernel.org,
	netdev@...r.kernel.org, devicetree-discuss@...ts.ozlabs.org,
	linux-arm-kernel@...ts.infradead.org,
	linuxppc-dev@...ts.ozlabs.org, Alan Cox <alan@...rguk.ukuu.org.uk>,
	Arnd Bergmann <arnd@...db.de>,
	Christoph Lameter <cl@...ux.com>,
	David Miller <davem@...emloft.net>,
	Krzysztof Halasa <khc@...waw.pl>,
	Peter Zijlstra <peterz@...radead.org>,
	Rodolfo Giometti <giometti@...ux.it>,
	Thomas Gleixner <tglx@...utronix.de>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Mike Frysinger <vapier@...too.org>,
	Paul Mackerras <paulus@...ba.org>,
	Russell King <linux@....linux.org.uk>
Subject: Re: [PATCH V12 4/4] ptp: Added a clock driver for the National
 Semiconductor PHYTER.

On Mon, 2011-02-28 at 08:58 +0100, Richard Cochran wrote:
> This patch adds support for the PTP clock found on the DP83640.
> The basic clock operations and one external time stamp have
> been implemented.

Just locking rule comment nits here.

> +static int tdr_write(int bc, struct phy_device *dev,
> +		     const struct timespec *ts, u16 cmd)
> +{
> +	ext_write(bc, dev, PAGE4, PTP_TDR, ts->tv_nsec & 0xffff);/* ns[15:0]  */
> +	ext_write(bc, dev, PAGE4, PTP_TDR, ts->tv_nsec >> 16);   /* ns[31:16] */
> +	ext_write(bc, dev, PAGE4, PTP_TDR, ts->tv_sec & 0xffff); /* sec[15:0] */
> +	ext_write(bc, dev, PAGE4, PTP_TDR, ts->tv_sec >> 16);    /* sec[31:16]*/
> +
> +	ext_write(bc, dev, PAGE4, PTP_CTL, cmd);
> +
> +	return 0;
> +}

The above needs to hold the extreg_lock, and should be commented as
such.

And again, the function names are sort of generic, and could use a
dp83640_ prefix or something.

thanks
-john


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