From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756444AbcK2JLl (ORCPT ); Tue, 29 Nov 2016 04:11:41 -0500 Received: from Galois.linutronix.de ([146.0.238.70]:50239 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754993AbcK2JLh (ORCPT ); Tue, 29 Nov 2016 04:11:37 -0500 Date: Tue, 29 Nov 2016 10:08:53 +0100 (CET) From: Thomas Gleixner To: Grygorii Strashko cc: "David S. Miller" , netdev@vger.kernel.org, Mugunthan V N , Richard Cochran , Sekhar Nori , linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, Rob Herring , devicetree@vger.kernel.org, Murali Karicheri , Wingman Kwok , John Stultz Subject: Re: [PATCH v2 11/13] clocksource: export the clocks_calc_mult_shift to use by timestamp code In-Reply-To: <20161128230337.6731-12-grygorii.strashko@ti.com> Message-ID: References: <20161128230337.6731-1-grygorii.strashko@ti.com> <20161128230337.6731-12-grygorii.strashko@ti.com> User-Agent: Alpine 2.20 (DEB 67 2015-01-07) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 28 Nov 2016, Grygorii Strashko wrote: > From: Murali Karicheri > > 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 > Cc: Thomas Gleixner > Signed-off-by: Murali Karicheri > Signed-off-by: Grygorii Strashko Acked-by: Thomas Gleixner > --- > 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 > > From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Gleixner Subject: Re: [PATCH v2 11/13] clocksource: export the clocks_calc_mult_shift to use by timestamp code Date: Tue, 29 Nov 2016 10:08:53 +0100 (CET) Message-ID: References: <20161128230337.6731-1-grygorii.strashko@ti.com> <20161128230337.6731-12-grygorii.strashko@ti.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Cc: "David S. Miller" , netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Mugunthan V N , Richard Cochran , Sekhar Nori , linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Rob Herring , devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Murali Karicheri , Wingman Kwok , John Stultz To: Grygorii Strashko Return-path: In-Reply-To: <20161128230337.6731-12-grygorii.strashko-l0cyMroinI0@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: netdev.vger.kernel.org On Mon, 28 Nov 2016, Grygorii Strashko wrote: > From: Murali Karicheri > > 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 > Cc: Thomas Gleixner > Signed-off-by: Murali Karicheri > Signed-off-by: Grygorii Strashko Acked-by: Thomas Gleixner > --- > 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-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html