From mboxrd@z Thu Jan 1 00:00:00 1970 From: tglx@linutronix.de (Thomas Gleixner) Date: Fri, 29 Apr 2011 19:05:45 +0200 (CEST) Subject: Architecture specific implementations for tickless kernel and deferrable timers In-Reply-To: References: <20110426203756.GD17290@n2100.arm.linux.org.uk> <20110428133826.GM17290@n2100.arm.linux.org.uk> <20110428142822.GN17290@n2100.arm.linux.org.uk> <20110428182420.GF17290@n2100.arm.linux.org.uk> <20110429143435.GU5126@n2100.arm.linux.org.uk> Message-ID: To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Fri, 29 Apr 2011, Vikram Narayanan wrote: > On Fri, Apr 29, 2011 at 8:04 PM, Russell King - ARM Linux > wrote: > > On Fri, Apr 29, 2011 at 07:56:56PM +0530, Vikram Narayanan wrote: > >> Can you also give some idea on how the system's RTC is hooked up with > >> the generic timekeeping code. > >> Is it hooked up in someway so that the walltime is calculated wrt the > >> initial value of the RTC? > > > > I'd like to pass you over to the RTC folk, but I don't think they're > > very active anymore. > > > > Suffice it to say that the RTC subsystem will set the system date/time > > on initialization from the RTC device if one is provided. ?All I can > > suggest is to look at drivers/rtc and include/linux/rtc.h for the > > details. ?The MAINTAINERS file should list who is responsible for RTC > > stuff as well as a mailing list for it. > > > Yes. Sure. I already have a driver in place for RTC, under /dev/rtc. I > will try to post my doubts in the RTC mailing lists. > Just noticed a folder clocksource under drivers. > Quite curious about what it is for? > Can you give some hints about it? That's for clock sources which are shared accross platforms. Thanks, tglx