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path: root/drivers/clocksource/timer-of.c (follow)
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2018-01-08clocksource/drivers/timer-of: Don't request the resource by nameDaniel Lezcano1-4/+4
When the driver does not specify a name for the resource, don't use of_io_request_and_map() but of_iomap(). That prevents resource name allocation conflicts on some platforms which have the same name as the node. Tested-by: Benjamin Gaignard <benjamin.gaignard@st.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Benjamin Gaignard <benjamin.gaignard@st.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1515418139-23276-10-git-send-email-daniel.lezcano@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-01-08clocksource/drivers/timer-of: Store the device node pointer in 'struct timer_of'Daniel Lezcano1-0/+3
Under certain circumstances, some specific operations must be done with the device node pointer, which forces the timer code to propagate the pointer to the functions which need it. In order to consolidate the function signatures in the different drivers by using the timer-of structure, let's store it in the timer-of structure as a handy pointer when it is needed. Tested-by: Benjamin Gaignard <benjamin.gaignard@st.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Benjamin Gaignard <benjamin.gaignard@st.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1515418139-23276-9-git-send-email-daniel.lezcano@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-01-08clocksource/drivers/timer-of: Add kernel documentationDaniel Lezcano1-0/+37
The current code has no comments, neither any function descriptions. Fix this by adding function descriptions in kernel doc format. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1515418139-23276-6-git-send-email-daniel.lezcano@linaro.org [ Spelling and style fixes. ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-01-08clocksource/drivers/timer-of: Fix function namesDaniel Lezcano1-18/+18
All the functions are not prefixed with 'timer_of_', fix the naming in order to have the code consistent. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1515418139-23276-5-git-send-email-daniel.lezcano@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-11-14clocksource/timer_of: Rename timer_of_exit to timer_of_cleanupBenjamin Gaignard1-1/+8
Change the function name to something more explicit since it is only used in init error cases. Add __init annotation and description about the function usage. Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: mark.rutland@arm.com Cc: devicetree@vger.kernel.org Cc: alexandre.torgue@st.com Cc: arnd@arndb.de Cc: julien.thierry@arm.com Cc: daniel.lezcano@linaro.org Cc: linux@armlinux.org.uk Cc: robh+dt@kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: mcoquelin.stm32@gmail.com Cc: sudeep.holla@arm.com Cc: ludovic.barre@st.com Link: https://lkml.kernel.org/r/1510649563-22975-2-git-send-email-benjamin.gaignard@linaro.org
2017-10-29clocksource/drivers/timer-of: Add timer_of_exit functionBenjamin Gaignard1-0/+12
The timer-of API does not provide a function to undo what has been done by the timer_of_init() function. Add a timer_of_exit() function. Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2017-09-04Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds1-6/+5
Pull timer fixes from Thomas Gleixner: "A rather small update for the time(r) subsystem: - A new clocksource driver IMX-TPM - Minor fixes to the alarmtimer facility - Device tree cleanups for Renesas drivers - A new kselftest and fixes for the timer related tests - Conversion of the clocksource drivers to use %pOF - Use the proper helpers to access rlimits in the posix-cpu-timer code" * 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: alarmtimer: Ensure RTC module is not unloaded clocksource: Convert to using %pOF instead of full_name clocksource/drivers/bcm2835: Remove message for a memory allocation failure devicetree: bindings: Remove deprecated properties devicetree: bindings: Remove unused 32-bit CMT bindings devicetree: bindings: Deprecate property, update example devicetree: bindings: r8a73a4 and R-Car Gen2 CMT bindings devicetree: bindings: R-Car Gen2 CMT0 and CMT1 bindings devicetree: bindings: Remove sh7372 CMT binding clocksource/drivers/imx-tpm: Add imx tpm timer support dt-bindings: timer: Add nxp tpm timer binding doc posix-cpu-timers: Use dedicated helper to access rlimit values alarmtimer: Fix unavailable wake-up source in sysfs timekeeping: Use proper timekeeper for debug code kselftests: timers: set-timer-lat: Add one-shot timer test cases kselftests: timers: set-timer-lat: Tweak reporting when timer fires early kselftests: timers: freq-step: Fix build warning kselftests: timers: freq-step: Define ADJ_SETOFFSET if device has older kernel headers
2017-08-31clocksource: Convert to using %pOF instead of full_nameRob Herring1-6/+5
Now that we have a custom printf format specifier, convert users of full_name to use %pOF instead. This is preparation to remove storing of the full path string for each node. Signed-off-by: Rob Herring <robh@kernel.org> Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Marc Gonzalez <marc_gonzalez@sigmadesigns.com> Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com> Cc: Alexandre Torgue <alexandre.torgue@st.com> Cc: linux-arm-kernel@lists.infradead.org Acked-by: Marc Gonzalez <marc_gonzalez@sigmadesigns.com> Acked-by: Alexandre TORGUE <alexandre.torgue@st.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2017-08-11clocksource/drivers/timer-of: Checking for IS_ERR() instead of NULLDan Carpenter1-2/+2
The current code checks the return value of the of_io_request_and_map() function as it was returning a NULL pointer in case of error. However, it returns an error code encoded in the pointer return value, not a NULL value. Fix this by checking the returned pointer against IS_ERR() and return the error with PTR_ERR(). Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2017-07-17clocksource/drivers/timer-of: Handle of_irq_get_byname() result correctlySergei Shtylyov1-2/+10
of_irq_get_byname() may return a negative error number as well as 0 on failure, while timer_irq_init() only checks for 0, blithely continuing with the call to request_[percpu_]irq() -- those functions expect *unsigned int*, so would probably fail anyway when a large IRQ number resulting from a conversion of a negative error number is passed to them... This, however, is incorrect behavior -- error number is not IRQ number. Filter out the negative error numbers, complain, and return them to the timer_irq_init()'s callers... Fixes: dc11bae78529 ("clocksource/drivers: Add timer-of common init routine") Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Link: http://lkml.kernel.org/r/20170717180114.678825147@cogentembedded.com
2017-06-26clocksource/drivers/timer-of: Fix invalid iomap checkDaniel Lezcano1-1/+1
A typo in the code checks the return value of iomap against !NULL and, thus, fails everytime the mapping succeed. Fix this by inverting the condition in the check. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2017-06-22clocksource/drivers: Fix uninitialized variable use in timer_of_initArnd Bergmann1-3/+2
If none of the flags are set, 'ret' is uninitialized as pointed out by gcc: drivers/clocksource/timer-of.c: In function 'timer_of_init': drivers/clocksource/timer-of.c:160:9: error: 'ret' may be used uninitialized in this function [-Werror=maybe-uninitialized] Since calling the function without any of the flags is an error, set the return value to -EINVAL for that case. [ tglx: Get rid of the silly backwards goto while at it ] Fixes: dc11bae78529 ("clocksource/drivers: Add timer-of common init routine") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Link: http://lkml.kernel.org/r/20170621215005.3870011-1-arnd@arndb.de
2017-06-14clocksource/drivers: Add timer-of common init routineDaniel Lezcano1-0/+172
The different drivers are all using the same pattern when initializing. 1. Get the base address 2. Get the irq number 3. Get the clock 4. Prepare and enable the clock 5. Get the rate 6. Request an interrupt Instead of repeating again and again these steps in all the drivers, let's provide a common init routine to give the opportunity to factor all of them out. We can expect a significant kernel size improvement when the common routine will be used in all the drivers. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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