Re: [PATCH v2 12/13] net: ethernet: ti: cpts: calc mult and shift from refclk freq
From: Richard Cochran <hidden>
Date: 2016-11-29 10:35:10
Also in:
linux-devicetree, linux-omap, lkml
On Mon, Nov 28, 2016 at 05:03:36PM -0600, Grygorii Strashko wrote:
+static void cpts_calc_mult_shift(struct cpts *cpts)
+{
+ u64 frac, maxsec, ns;
+ u32 freq, mult, shift;
+
+ freq = clk_get_rate(cpts->refclk);
+
+ /* Calc the maximum number of seconds which we can run before
+ * wrapping around.
+ */
+ maxsec = cpts->cc.mask;
+ do_div(maxsec, freq);
+ if (maxsec > 600 && cpts->cc.mask > UINT_MAX)
+ maxsec = 600;The reason for this test is not obvious. Why check cc.mask against UINT_MAX? Please use the comment to explain it. Thanks, Richard -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html