On Mon, 28 Nov 2016, Grygorii Strashko wrote: > From: Murali Karicheri <m-karicheri2@xxxxxx> > > The CPSW CPTS driver is capable of doing timestamping on tx/rx packets and > requires to know mult and shift factors for timestamp conversion from raw > value to nanoseconds (ptp clock). Now these mult and shift factors are > calculated manually and provided through DT, which makes very hard to > support of a lot number of platforms, especially if CPTS refclk is not the > same for some kind of boards and depends on efuse settings (Keystone 2 > platforms). Hence, export clocks_calc_mult_shift() to allow drivers like > CPSW CPTS (and other ptp drivesr) to benefit from automaitc calculation of > mult and shift factors. > > Cc: John Stultz <john.stultz@xxxxxxxxxx> > Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> > Signed-off-by: Murali Karicheri <m-karicheri2@xxxxxx> > Signed-off-by: Grygorii Strashko <grygorii.strashko@xxxxxx> Acked-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> > --- > kernel/time/clocksource.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c > index 7e4fad7..150242c 100644 > --- a/kernel/time/clocksource.c > +++ b/kernel/time/clocksource.c > @@ -89,6 +89,7 @@ clocks_calc_mult_shift(u32 *mult, u32 *shift, u32 from, u32 to, u32 maxsec) > *mult = tmp; > *shift = sft; > } > +EXPORT_SYMBOL_GPL(clocks_calc_mult_shift); > > /*[Clocksource internal variables]--------- > * curr_clocksource: > -- > 2.10.1 > > -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
