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