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-omap, lkml, netdev
On Mon, Nov 28, 2016 at 05:03:36PM -0600, Grygorii Strashko wrote:
quoted hunk ↗ jump to hunk
+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