summaryrefslogtreecommitdiffstats
path: root/drivers/clocksource/em_sti.c
Commit message (Collapse)AuthorAgeFilesLines
* clocksource/drivers/em_sti: Fix error return codes in em_sti_probe()Gustavo A. R. Silva2017-08-101-5/+6
| | | | | | | | | Propagate the return values of platform_get_irq and devm_request_irq on failure. Cc: Frans Klaver <fransklaver@gmail.com> Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
* clocksource: em_sti: Compute rate before registrationNicolai Stange2017-03-231-13/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | With the upcoming NTP correction related rate adjustments to be implemented in the clockevents core, the latter needs to get informed about every rate change of a clockevent device made after its registration. Currently, em_sti violates this requirement in that it registers its clockevent device with a dummy rate and sets its final rate through clockevents_config() called from its ->set_state_oneshot(). This patch moves the setting of the clockevent device's rate to its registration. I checked all current em_sti users in arch/arm/mach-shmobile and right now, none of them changes any rate in any clock tree relevant to em_sti after their respective time_init(). Since all em_sti instances are created after time_init(), none of them should ever observe any clock rate changes. - Determine the ->rate value in em_sti_probe() at device probing rather than at first usage. - Set the clockevent device's rate at its registration. - Although not strictly necessary for the upcoming clockevent core changes, set the clocksource's rate at its registration for consistency. Signed-off-by: Nicolai Stange <nicstange@gmail.com> Signed-off-by: John Stultz <john.stultz@linaro.org>
* clocksource: em_sti: Split clock prepare and enable stepsNicolai Stange2017-03-231-7/+14
| | | | | | | | | | | | | | | | | | Currently, the em_sti driver prepares and enables the needed clock in em_sti_enable(), potentially called through its clockevent device's ->set_state_oneshot(). However, the clk_prepare() step may sleep whereas tick_program_event() and thus, ->set_state_oneshot(), can be called in atomic context. Split the clk_prepare_enable() in em_sti_enable() into two steps: - prepare the clock at device probing via clk_prepare() - and enable it in em_sti_enable() via clk_enable(). Slightly reorder resource initialization in em_sti_probe() in order to facilitate error handling in later patches. Signed-off-by: Nicolai Stange <nicstange@gmail.com> Signed-off-by: John Stultz <john.stultz@linaro.org>
* clocksource: Use a plain u64 instead of cycle_tThomas Gleixner2016-12-251-6/+6
| | | | | | | | | | | | | | | | | | | | | There is no point in having an extra type for extra confusion. u64 is unambiguous. Conversion was done with the following coccinelle script: @rem@ @@ -typedef u64 cycle_t; @fix@ typedef cycle_t; @@ -cycle_t +u64 Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: John Stultz <john.stultz@linaro.org>
* clocksource/drivers/em_sti: Remove unneeded memset()sAlexey Klimov2015-10-151-2/+0
| | | | | | | | | | Memory for cs and ced fields in struct em_sti_priv is allocated by devm_kzalloc() in the beginning of em_sti_probe() so they don't need to be zeroed one more time in em_sti_register_clocksource() and in em_sti_register_clockevent(). Signed-off-by: Alexey Klimov <alexey.klimov@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
* clockevents/drivers/em_sti: Migrate to new 'set-state' interfaceViresh Kumar2015-08-061-25/+14
| | | | | | | | | | | | | | | | | | | | | | | | Migrate em_sti driver to the new 'set-state' interface provided by the clockevents core, the earlier 'set-mode' interface is marked obsolete now. This also enables us to implement callbacks for new states of clockevent devices, for example: ONESHOT_STOPPED. NOTE: This also drops a special check: if (old_mode == CLOCK_EVT_MODE_ONESHOT) em_sti_stop(p, USER_CLOCKEVENT); as it doesn't look like that important. This driver only supports ONESHOT and we can only move only to SHUTDOWN from ONESHOT and. Also on second call (on shutdown), em_sti_stop() would return without disabling the device again. Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Magnus Damm <magnus.damm@gmail.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
* clocksource: Rename __clocksource_updatefreq_*() to ↵John Stultz2015-03-131-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | __clocksource_update_freq_*() Ingo requested this function be renamed to improve readability, so I've renamed __clocksource_updatefreq_scale() as well as the __clocksource_updatefreq_hz/khz() functions to avoid squishedtogethernames. This touches some of the sh clocksources, which I've not tested. The arch/arm/plat-omap change is just a comment change for consistency. Signed-off-by: John Stultz <john.stultz@linaro.org> Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Dave Jones <davej@codemonkey.org.uk> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Prarit Bhargava <prarit@redhat.com> Cc: Richard Cochran <richardcochran@gmail.com> Cc: Stephen Boyd <sboyd@codeaurora.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1426133800-29329-13-git-send-email-john.stultz@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
* clocksource: em_sti: Remove unnecessary OOM messagesJingoo Han2014-05-231-3/+1
| | | | | | | | The site-specific OOM messages are unnecessary, because they duplicate the MM subsystem generic OOM message. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
* clocksource: em_sti: convert to clk_prepare/unprepareShinya Kuribayashi2013-10-221-2/+2
| | | | | | | | | | | | Add calls to clk_prepare and unprepare so that EMMA Mobile EV2 can migrate to the common clock framework. Signed-off-by: Shinya Kuribayashi <shinya.kuribayashi.px@renesas.com> Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Magnus Damm <damm@opensource.se> Signed-off-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
* clocksource: em_sti: Set cpu_possible_mask to fix SMP broadcastMagnus Damm2013-09-261-1/+1
| | | | | | | | | | | | | | | | | | Update the STI driver by setting cpu_possible_mask to make EMEV2 SMP work as expected together with the ARM broadcast timer. This breakage was introduced by: f7db706 ARM: 7674/1: smp: Avoid dummy clockevent being preferred over real hardware clock-event Without this fix SMP operation is broken on EMEV2 since no broadcast timer interrupts trigger on the secondary CPU cores. Signed-off-by: Magnus Damm <damm@opensource.se> Tested-by: Simon Horman <horms+renesas@verge.net.au> Reviewed-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
* clocksource: em_sti: Convert to devm_* managed helpersLaurent Pinchart2013-08-221-35/+14
| | | | | | | | Replace kzalloc, clk_get, ioremap and request_irq by their managed counterparts to simplify error paths. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org>
* clocksource: em_sti: Set initcall level to subsysSimon Horman2013-03-131-1/+12
| | | | | | | | | | | | | | | | | The reason for this is to ensure that STI is probed earlier than with its previous initcall level, module init. This came up as a problem with using CMT as a clock source kzm9g-reference which does not make use of early timers or devices. In that scenario initialisation of SDHI and MMCIF both stall on msleep() calls due to the absence of a initialised clock source. The purpose of this change is to keep the STI code in sync with the CMT code which has been modified in a similar manner.. Boot tested on: kzm9d. Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
* Drivers: clocksource: remove __dev* attributes.Greg Kroah-Hartman2013-01-031-4/+4
| | | | | | | | | | | | | | | | CONFIG_HOTPLUG is going away as an option. As a result, the __dev* markings need to be removed. This change removes the use of __devinit, __devexit_p, __devinitdata, __devinitconst, and __devexit from these drivers. Based on patches originally written by Bill Pemberton, but redone by me in order to handle some of the coding style issues better, by hand. Cc: Bill Pemberton <wfp5p@virginia.edu> Cc: John Stultz <johnstul@us.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* clocksource: em_sti: Add DT supportMagnus Damm2012-05-251-0/+7
| | | | | | | | | | | | | | | Update the em-sti driver to support DT. Signed-off-by: Magnus Damm <damm@opensource.se> Cc: arnd@arndb.de Cc: horms@verge.net.au Cc: johnstul@us.ibm.com Cc: rjw@sisk.pl Cc: lethal@linux-sh.org Cc: gregkh@linuxfoundation.org Cc: olof@lixom.net Link: http://lkml.kernel.org/r/20120509143950.27521.7949.sendpatchset@w520 Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* clocksource: em_sti: Emma Mobile STI driverMagnus Damm2012-05-251-0/+399
The STI hardware is based on a single 48-bit 32kHz counter that together with two individual compare registers can generate interrupts. There are no timer operating modes selectable which means that the timer can not clear on match. This driver is providing clocksource support for the 48-bit counter. Clockevents are also supported using the same timer in oneshot mode. Signed-off-by: Magnus Damm <damm@opensource.se> Cc: horms@verge.net.au Cc: arnd@arndb.de Cc: johnstul@us.ibm.com Cc: rjw@sisk.pl Cc: lethal@linux-sh.org Cc: gregkh@linuxfoundation.org Cc: olof@lixom.net Link: http://lkml.kernel.org/r/20120525070344.23443.69756.sendpatchset@w520 Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-07 05:03:17 +0000