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path: root/arch/arm/plat-nomadik/timer.c
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2012-05-22drivers: timer: cpuidle U8500 supportPhilippe Langlais
cpuidle driver Signed-off-by: Rickard Andersson <rickard.andersson@stericsson.com> Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/32084 Reviewed-by: Jonas ABERG <jonas.aberg@stericsson.com> Tested-by: Jonas ABERG <jonas.aberg@stericsson.com>
2012-05-22ARM: plat-nomadik:timer: Add delay timer supportJonas Aaberg
Change-Id: If518e847cf391d1d9dbc4a0d0bca8336d66de88f Signed-off-by: Jonas Aaberg <jonas.aberg@stericsson.com> Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/32049
2012-01-31ARM: plat-nomadik: modernize MTU timerLinus Walleij
Modernize the MTU timer to rely on the clockevents core to calculate mult and shift and setup the clock event. Acked-by: Alessandro Rubini <rubini@unipv.it> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-01-31ARM: plat-nomadik: handle clocking properlyLinus Walleij
clk_prepare() was missing from the Nomadik MTU driver, also handle errors on prepare and enable in the simplest way possible, by bugging out - we cannot start the system without time anyway. Acked-by: Alessandro Rubini <rubini@unipv.it> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2012-01-31ARM: plat-nomadik: get rid of global mtu base pointerLinus Walleij
Pass the base offset to the Nomadik MTU timer in the init call instead of keeping a global pointer to be assigned. Acked-by: Alessandro Rubini <rubini@unipv.it> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2011-12-18ARM: 7205/2: sched_clock: allow sched_clock to be selected at runtimeMarc Zyngier
sched_clock() is yet another blocker on the road to the single image. This patch implements an idea by Russell King: http://www.spinics.net/lists/linux-omap/msg49561.html Instead of asking the platform to implement both sched_clock() itself and the rollover callback, simply register a read() function, and let the ARM code care about sched_clock() itself, the conversion to ns and the rollover. sched_clock() uses this read() function as an indirection to the platform code. If the platform doesn't provide a read(), the code falls back to the jiffy counter (just like the default sched_clock). This allow some simplifications and possibly some footprint gain when multiple platforms are compiled in. Among the drawbacks, the removal of the *_fixed_sched_clock optimization which could negatively impact some platforms (sa1100, tegra, versatile and omap). Tested on 11MPCore, OMAP4 and Tegra. Cc: Imre Kaloz <kaloz@openwrt.org> Cc: Eric Miao <eric.y.miao@gmail.com> Cc: Colin Cross <ccross@android.com> Cc: Erik Gilling <konkers@android.com> Cc: Olof Johansson <olof@lixom.net> Cc: Sascha Hauer <kernel@pengutronix.de> Cc: Alessandro Rubini <rubini@unipv.it> Cc: STEricsson <STEricsson_nomadik_linux@list.st.com> Cc: Lennert Buytenhek <kernel@wantstofly.org> Cc: Ben Dooks <ben-linux@fluff.org> Tested-by: Jamie Iles <jamie@jamieiles.com> Tested-by: Tony Lindgren <tony@atomide.com> Tested-by: Kyungmin Park <kyungmin.park@samsung.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Nicolas Pitre <nico@linaro.org> Acked-by: Krzysztof Halasa <khc@pm.waw.pl> Acked-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-09-22ARM: plat-nomadik: timer: Export reset functionsJonas Aaberg
We make the reset function from the driver public, then we also move of all register defines from the public header file into driver, where they belong. Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Jonas Aaberg <jonas.aberg@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2011-09-22ARM: plat-nomadik: timer: Add support for periodic timersJonas Aaberg
This adds support for a periodic mode in the MTU (Nomadik) timer clockevent driver. It also include changes needed for deeper powerstates where MTU block gets powered off. Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Jonas Aaberg <jonas.aberg@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2011-09-22ARM: plat-nomadik: MTU sched_clock as an optionMattias Wallin
This patch makes it possible to configure away the sched_clock part of the MTU timer. Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Mattias Wallin <mattias.wallin@stericsson.com> Signed-off-by: Jonas Aberg <jonas.aberg@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2011-05-23clocksource: convert ARM 32-bit down counting clocksourcesRussell King
Convert SP804, MXC, Nomadik and Orion 32-bit down-counting clocksources to generic mmio clocksource infrastructure. Acked-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Sascha Hauer <kernel@pengutronix.de> Cc: Alessandro Rubini <rubini@unipv.it> Acked-by: Linus Walleij <linus.walleij@linaro.org> Cc: Lennert Buytenhek <kernel@wantstofly.org> Acked-by: Nicolas Pitre <nico@fluxnic.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-12-22ARM: nomadik: convert sched_clock() to use new infrastructureRussell King
Convert nomadik platforms to use the new sched_clock() infrastructure for extending 32bit counters to full 64-bit nanoseconds. Acked-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-12-22ARM: ensure all sched_clock() implementations are notrace markedRussell King
ftrace requires sched_clock() to be notrace. Ensure that all implementations are so marked. Also make sure that they include linux/sched.h Also ensure OMAP clocksource read functions are marked notrace as they're used for sched_clock() too. Tested-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Tested-by: Will Deacon <will.deacon@arm.com> Tested-by: Mikael Pettersson <mikpe@it.uu.se> Tested-by: Eric Miao <eric.y.miao@gmail.com> Tested-by: Olof Johansson <olof@lixom.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-12-22ARM: nomadik: update clock source registrationRussell King
In d7e81c2 (clocksource: Add clocksource_register_hz/khz interface) new interfaces were added which simplify (and optimize) the selection of the divisor shift/mult constants. Switch over to using this new interface. Acked-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-11-21ARM: 6488/1: nomadik: prevent sched_clock() wraparoundLinus Walleij
The current implementation of sched_clock() for the Nomadik family is based on the clock source that will wrap around without any compensation. Currently on the Ux500 after 1030 seconds. Utilize cnt32_to_63 to expand the sched_clock() counter to 63 bits and introduce a keepwarm() timer to assure that sched clock and this cnt32_to_63 is called atleast once every half period. When I print out the actual wrap-around time, and using a year (3600*24*365 seconds) as minumum wrap limit I get an actual wrap-around of: sched_clock: using 55 bits @ 8333125 Hz wrap in 416 days Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-09-17ARM: 6376/1: plat-nomadik: MTU: Change prescaler limit and comment updatesLinus Walleij
The prescaler 16 is now used only when the timer runs at 32 MHz or more. Some comment updates as well. Acked-by: Alessandro Rubini <rubini@unipv.it> Signed-off-by: Jonas Aaberg <jonas.aberg@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-09-17ARM: 6375/1: plat-nomadik: MTU timer trivial bug fixLinus Walleij
timer0 to 3 are all on mtu block 0, so don't calculate the clock event rate based upon mtu block 1's clock speed. Acked-by: Alessandro Rubini <rubini@unipv.it> Signed-off-by: Jonas Aaberg <jonas.aberg@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-06-16ARM: 6153/1: nomadik MTU to use dynamic shift and mult assignmentLinus Walleij
This removes the hard-coded shift values for the MTU timer, since the different platforms using this has very different running frequencies doing this dynamically is a better idea. Also take this opportunity to make a more through shutdown of the MTU clockevent when requested. Acked-by: Alessandro Rubini <rubini@unipv.it> Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-05-27ARM: 6145/1: ux500 MTU clockrate correctionLinus Walleij
This adjusts the clockrate for the MTU timer. On the different UX500 variants this rate is different. The platform can also have been set up at hardware initialization, bootloader or early init for different clock speeds. To have the clock framework available early so the timers can use them, the clock initialization for Nomadik and ux500 is moved to IRQ init time. A custom per-clock callback is added to handle special cases like this. This solves a user-visible bug: without this patch the current UX500 platforms will not be synchronized to wall-clock time and the platform will drift in time. Acked-by: Rabin Vincent <rabin.vincent@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-05-13ARM: 6107/1: plat-nomadik: use the MTU clocksrc for sched_clockLinus Walleij
This provides some serious scheduling for the Nomadik family by introducing a sched_clock() using the MTU clock source in the same manner as e.g. OMAP or U300. This type of solutions has been discussed at no end in the past, however we need this resolution for making measurements and using HRTimers. Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-03-19ARM: 5978/1: plat-nomadik: use one-shot clock eventsAlessandro Rubini
This is a complete rewrite of the MTU driver, using one-shot for events and a free-running timer for stamping. It allows CONFIG_NO_HZ and CONFIG_HIGH_RES_TIMERS to work on Nomadik and Ux500. Signed-off-by: Alessandro Rubini <rubini@unipv.it> Acked-by: Linus Walleij <linus.walleij@stericsson.com> Acked-by: Andrea Gallo <andrea.gallo@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-01-22arm/{pxa,sa1100,nomadik}: Don't disable irqs in set_next_event and set_modeUwe Kleine-König
These functions are called with irqs already off. This commit removes the calls to raw_local_irq_save and raw_local_irq_restore on platforms that don't have to use a shared interrupt for their timekeeping. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
2009-11-28ARM: 5786/1: Introduce plat-nomadik, MTU code re-organizationSrinidhi Kasagar
Introduce the plat-nomadik folder for ST-Ericsson machines including the existing nomadik 8815 architecture. This also moves the existing MTU (MultiTimerUnit) of nomadik 8815 to the proposed plat-nomadik and adds HAS_MTU. The patch has been re-based to 2.6.32-rc6 Signed-off-by: srinidhi kasagar <srinidhi.kasagar@stericsson.com> Acked-by: Alessandro Rubini <rubini@unipv.it> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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