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path: root/arch/arm/common/timer-sp.c
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2015-06-02ARM: 8366/1: move Dual-Timer SP804 driver to drivers/clocksourceSudeep Holla1-309/+0
The ARM Dual-Timer SP804 module is peripheral found not only on ARM32 platforms but also on ARM64 platforms. This patch moves the driver out of arch/arm to driver/clocksource so that it can be used on ARM64 platforms also. Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Rob Herring <robh@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Olof Johansson <olof@lixom.net> Acked-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2015-06-02ARM: 8365/1: introduce sp804_timer_disable and remove arm_timer.h inclusionSudeep Holla1-0/+5
The header asm/hardware/arm_timer.h is included in various machine specific files to access TIMER_CTRL and initialise to a known state. This patch introduces a new function sp804_timer_disable to disable the SP804 timers and uses the same for initialising the timers to known(off) state, thereby removing the dependency on the header asm/hardware/arm_timer.h This change is in prepartion to move sp804 timer support out of arch/arm so that it can be used on ARM64 platforms. Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Olof Johansson <olof@lixom.net> Acked-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-06-24ARM: timer-sp: allow getting timer1 clock from DT to fallback to legacy clockRob Herring1-2/+2
The sp804 clocks may be specified in DT, but the kernel may still be using legacy clocks. This is handled if a single clock for sp804 is present, but not when 3 clocks are present. This prevents Versatile platforms from breaking when the DT has clocks added. Signed-off-by: Rob Herring <robh@kernel.org> Cc: Russell King <linux@arm.linux.org.uk>
2014-02-13ARM: SP804: make Integrator/CP timer pick clock from DTLinus Walleij1-2/+6
This modifies the SP804 driver so that the clock will be taken from the device tree node for the timer. Cc: Russell King <rmk+kernel@arm.linux.org.uk> Cc: Rob Herring <rob.herring@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2013-12-06Merge branch 'soc/sched_clock' into next/socKevin Hilman1-2/+2
From Stephen Boyd: * soc/sched_clock: ARM: versatile: Switch to sched_clock_register() ARM: orion: Switch to sched_clock_register() ARM: OMAP: Switch to sched_clock_register() ARM: iop: Switch to sched_clock_register() ARM: u300: Switch to sched_clock_register() ARM: sa1100: Switch to sched_clock_register() ARM: pxa: Switch to sched_clock_register() ARM: OMAP2+: Switch to sched_clock_register() ARM: OMAP1: Switch to sched_clock_register() ARM: msm: Switch to sched_clock_register() ARM: mmp: Switch to sched_clock_register() ARM: IXP4xx: Switch to sched_clock_register() ARM: integrator: Switch to sched_clock_register() ARM: imx: Switch to sched_clock_register() ARM: davinci: Switch to sched_clock_register() ARM: clps711x: Switch to sched_clock_register() ARM: timer-sp: Switch to sched_clock_register() Signed-off-by: Kevin Hilman <khilman@linaro.org>
2013-11-22ARM: timer-sp: Switch to sched_clock_register()Stephen Boyd1-2/+2
The 32 bit sched_clock interface now supports 64 bits. Upgrade to the 64 bit function to allow us to remove the 32 bit registration interface. Also mark the read function notrace since we're here and failure to do so would cause ftrace to break. Cc: Russell King <linux@arm.linux.org.uk> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Kevin Hilman <khilman@linaro.org>
2013-10-29ARM: 7856/1: timer-sp: remove deprecated IRQF_DISABLEDMichael Opdenacker1-1/+1
This patch proposes to remove the use of the IRQF_DISABLED flag It's a NOOP since 2.6.35 and it will be removed one day. Signed-off-by: Michael Opdenacker <michael.opdenacker@free-electrons.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-08-22ARM: timer-sp: Set dynamic irq affinityViresh Kumar1-1/+2
When a cpu goes to a deep idle state where its local timer is shutdown, it notifies the time frame work to use the broadcast timer instead. Unfortunately, the broadcast device could wake up any CPU, including an idle one which is not concerned by the wake up at all. This implies, in the worst case, an idle CPU will wake up to send an IPI to another idle cpu. This patch fixes this for ARM platforms using timer-sp, by setting CLOCK_EVT_FEAT_DYNIRQ feature. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2013-06-13sched_clock: Make ARM's sched_clock generic for all architecturesStephen Boyd1-1/+1
Nothing about the sched_clock implementation in the ARM port is specific to the architecture. Generalize the code so that other architectures can use it by selecting GENERIC_SCHED_CLOCK. Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> [jstultz: Merge minor collisions with other patches in my tree] Signed-off-by: John Stultz <john.stultz@linaro.org>
2013-04-12ARM: integrator-cp: convert use CLKSRC_OF for timer initRob Herring1-0/+35
Move the integrator-cp timer init to timer-sp.c and use CLKSRC_OF. There is no reason to use the aliases, so drop them from the init code. The integrator-cp timers are mistakenly called sp804 timers in the dts, but in fact they are not sp804 dual timers, but single timers with the same programming model. Fix the dts to reflect this. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Linus Walleij <linus.walleij@linaro.org>
2013-04-12ARM: timer-sp: convert to use CLKSRC_OF initRob Herring1-16/+89
This adds CLKSRC_OF based init for sp804 timer. The clock initialization is refactored to support retrieving the clock(s) from the DT. Signed-off-by: Rob Herring <rob.herring@calxeda.com>
2012-11-28ARM: 7586/1: sp804: set cpumask to cpu_possible_mask for clock event deviceWill Deacon1-1/+1
The SP804 driver statically initialises the cpumask of the clock event device to be cpu_all_mask, which is derived from the compile-time constant NR_CPUS. This breaks SMP_ON_UP systems where the interrupt controller handling the sp804 doesn't have the irq_set_affinity callback on the irq_chip, because the common timer code fails to identify the device as cpu-local and ends up treating it as a broadcast device instead. This patch fixes the problem by using cpu_possible_mask at runtime, which will correctly represent the possible CPUs when SMP_ON_UP is being used. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-02-10ARM: timer-sp: add sched_clock supportRob Herring1-1/+16
Add a sched_clock support for the sp804 timer. The clocksource timer can optionally initialize itself as sched_clock timer. Signed-off-by: Rob Herring <rob.herring@calxeda.com>
2011-12-24ARM: 7243/1: sp804: modernize clock event registrationLinus Walleij1-6/+1
This removes the hardcoded shift value and lets the clockevent core come up with suitable mult and div factors. Tested on the Integrator/CP. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-09-27clk: timer-sp: convert to clk_prepare()/clk_unprepare()Russell King1-0/+9
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-05-23clockevents: ARM sp804: obtain sp804 timer rate via clksRussell King1-8/+8
This allows platforms to specify the rate of the SP804 clockevent via the clk subsystem. While ARM boards clock these at 1MHz, BCMRing also has SP804 timers but are clocked at different rates. Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-05-23clockevents: ARM sp804: allow clockevent name to be specifiedRussell King1-4/+5
This allows platforms to specify the clcokevent name upon registration. Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-05-23clocksource: ARM sp804: obtain sp804 timer rate via clksRussell King1-1/+38
This allows platforms to specify the rate of the SP804 clocksource via the clk subsystem. While ARM boards clock these at 1MHz, BCMRing also has SP804 timers but are clocked at different rates. Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-05-23clocksource: ARM sp804: allow clocksource name to be specifiedRussell King1-2/+2
This allows platforms to specify the clocksource name upon registration, which is necessary should they wish to register more than one sp804 clocksource. Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-05-23clocksource: convert ARM 32-bit down counting clocksourcesRussell King1-24/+6
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>
2011-01-05Merge branch 'clksrc' into develRussell King1-3/+1
Conflicts: arch/arm/mach-vexpress/v2m.c arch/arm/plat-omap/counter_32k.c arch/arm/plat-versatile/Makefile
2010-11-04ARM: 6432/1: move timer-sp.c from versatile to commonRob Herring1-0/+154
From: Rob Herring <rob.herring@smooth-stone.com> The timer-sp h/w used on versatile platforms can also be used for other platforms, so move it to a common location. Signed-off-by: Rob Herring <rob.herring@smooth-stone.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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