- 18 Dec, 2012 40 commits
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Sachin Kamat authored
This eliminates having an #ifdef returning NULL for the case when OF is disabled. Signed-off-by:
Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Kim, Milo authored
Enabling RTC HW block depends on the default value of TPS65910 register. In some mode, RTC block is disabled by default.(eg. AM3517 Craneboard) In this case, RTC_PWDN(RTC power down) bit should be cleared to enable the RTC HW block. This patch also works in case that RTC block is active by default, because there is no side effect even if the bit is updated again. Tested on AM3517 Craneboard. Signed-off-by:
Milo(Woogyom) Kim <milo.kim@ti.com> Acked-by:
Venu Byravarasu <vbyravarasu@nvidia.com> Cc: Samuel Ortiz <sameo@linux.intel.com> Cc: Sivaram Nair <sivaramn@nvidia.com> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by:
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Sachin Kamat authored
This code is under #if 0 and not used. Signed-off-by:
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Tushar Behera authored
rtc-s3c driver is modified to use devm_request_and_ioremap() (combining request_mem_region and ioremap), devm_clk_get() and devm_request_irq() APIs. Since this removes the necessity of freeing the related resources the return path is also simplified. Signed-off-by:
Tushar Behera <tushar.behera@linaro.org> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Rob Herring <rob.herring@calxeda.com> Signed-off-by:
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Tushar Behera authored
err_nores label redirects to a simple return statement. Move the return statement to caller location and remove the label. Signed-off-by:
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Thierry Reding authored
Add an RTC driver for PCF8523 chips by NXP Semiconductors. No support is currently provided for the alarm and interrupt functions. Only the time and date functionality is implemented. Signed-off-by:
Thierry Reding <thierry.reding@avionic-design.de> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by:
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Devendra Naga authored
Use devm_kzalloc() and remove the error path free and the unload free as devm functions take care of freeing resources. Signed-off-by:
Devendra Naga <devendra.aaru@gmail.com> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Miguel Aguilar <miguel.aguilar@ridgerun.com> Signed-off-by:
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Devendra Naga authored
rtc_device_register() returns a pointer containing error code in case of error. Use that in the error return. Signed-off-by:
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Sivaram Nair authored
A cosmetic change to rename the irq name to match the device name. Signed-off-by:
Sivaram Nair <sivaramn@nvidia.com> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by:
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Deepak Sikri authored
The applications can set the RTC hardware to trigger interrupts in one of three modes: * AIE: Alarm interrupt * UIE: Update interrupt (ie: once per second) * PIE: Periodic interrupt (sub-second irqs) The above defined 3 modes are to be supported in the RTC HW in form of interrupts. The SPEAr RTC hardware does not support the later two modes. There have been refinements in the RTC core in mainline related to use of timer queue infrastructure to manage events in RTC. Please refer the below mentioned patch for details: * RTC: Rework RTC code to use timerqueue for events * SHA ID: 6610e089 There have been provisions added to support hardware that do not have support the UIE mode. Please refer the following patch. * rtc: Provide flag for rtc devices that don't support UIE * SHA ID: 4a649903 The patch makes use of the provision defined in the above patch to update the hardware status of UIE mode. Signed-off-by:Deepak Sikri <deepak.sikri@st.com> Signed-off-by:
Viresh Kumar <viresh.kumar@linaro.org> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by:
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Deepak Sikri authored
clk_{un}prepare is mandatory for platforms using common clock framework. Because for SPEAr we don't do anything in clk_{un}prepare() calls, just call them once in probe/remove. Signed-off-by: -
Viresh Kumar authored
Free the rtc-spear driver from tension of freeing resources :) devm_* derivatives of multiple routines are used while allocating resources, which would be freed automatically by kernel. Signed-off-by:
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Wei Yongjun authored
In case of error, test_init() needs to call platform_device_del() instead of platform_device_unregister(). Otherwise, we may call platform_device_put() twice. dpatch engine is used to auto generate this patch. (https://github.com/weiyj/dpatch) [akpm@linux-foundation.org: improve label naming] Signed-off-by:
Wei Yongjun <yongjun_wei@trendmicro.com.cn> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by:
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Devendra Naga authored
Replace the kzalloc() and kfree() calls with devm_kzalloc(). Signed-off-by:
Tony Prisk <linux@prisktech.co.nz> Signed-off-by:
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Roland Stigge authored
Add device tree support to the rtc-imxdi driver. Signed-off-by:
Roland Stigge <stigge@antcom.de> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Sascha Hauer <kernel@pengutronix.de> Cc: Russell King <linux@arm.linux.org.uk> Cc: Shawn Guo <shawn.guo@linaro.org> Signed-off-by:
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Roland Stigge authored
Enable support for i.MX53 in addition to i.MX25 by enabling the driver on ARCH_MXC generally. Signed-off-by:
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Vaibhav Hiremath authored
OMAP1 RTC driver is used in multiple devices like, OMAPL138 and AM33XX. Driver currently doesn't handle any clocks, which may be right for OMAP1 architecture but in case of AM33XX, the clock/module needs to be enabled in order to access the registers. So convert this driver to runtime pm, which internally handles rest. [afzal@ti.com: handle error path] Signed-off-by:
Vaibhav Hiremath <hvaibhav@ti.com> Signed-off-by:
Afzal Mohammed <afzal@ti.com> Acked-by:
Sekhar Nori <nsekhar@ti.com> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Sekhar Nori <nsekhar@ti.com> Cc: Kevin Hilman <khilman@ti.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Daniel Mack <zonque@gmail.com> Cc: Vaibhav Hiremath <hvaibhav@ti.com> Signed-off-by:
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Afzal Mohammed authored
rtc-omap driver can be reused for AM33xx RTC. Provide dependency in Kconfig. Signed-off-by:
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Afzal Mohammed authored
Enhance rtc-omap driver with DT capability Signed-off-by:
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Afzal Mohammed authored
rtc-omap driver is now capable of handling kicker mechanism, hence remove kicker handling at platform level, instead provide proper device name so that driver can handle kicker mechanism by itself Signed-off-by:
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Afzal Mohammed authored
OMAP RTC IP can have kicker feature. This prevents spurious writes to register. To write to registers kicker lock has to be released. Procedure to do it as follows, 1. write to kick0 register, 0x83e70b13 2. write to kick1 register, 0x95a4f1e0 Writing value other than 0x83e70b13 to kick0 enables write locking, more details about kicker mechanism can be found in section 20.3.3.5.3 of AM335X TRM @www.ti.com/am335x Here id table information is added and is used to distinguish those that require kicker handling and the ones that doesn't need it. There are more features in the newer IP's compared to legacy ones other than kicker, which driver currently doesn't handle, supporting additional features would be easier with the addition of id table. Older IP (of OMAP1) doesn't have revision register as per TRM, so revision register can't be relied always to find features, hence id table is being used. While at it, replace __raw_writeb/__raw_readb with writeb/readb; this driver is used on ARMv7 (AM335X SoC) Signed-off-by:
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Alan Cox authored
If elf_core_dump() is called and fill_note_info() fails in the kmalloc() then it returns 0 but has not yet initialised all the needed fields. As a result we do a kfree(randomness) after correctly skipping the thread data. [akpm@linux-foundation.org: checkpatch fixes] Signed-off-by:
Alan Cox <alan@linux.intel.com> Signed-off-by:
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Joe Perches authored
Store the camelcase variables in a hash and only emit a warning on the first use of each new variable. Signed-off-by:
Joe Perches <joe@perches.com> Cc: Andy Whitcroft <apw@canonical.com> Signed-off-by:
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Joe Perches authored
Even though the kernel doesn't support using floating point constants, add a regex for them. Support forms like: 0x123p1, 123e-1, 1.23, 1.5e23f Signed-off-by:
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Joe Perches authored
Hexadecimal values are current found in 2 parts. A hex constant like 0x123456abcdef is found as 0 and then x123456abcdef and later coalesced. Instead, reverse the order of the 2 searches in $Constant to find 0x first, then 0 so that the entire hex constant is found all at once. Signed-off-by:
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Joe Perches authored
switch default case is sometimes written as "default:;". This can cause new cases added below the default to be defective. Suggest adding a break; after empty default cases to avoid fallthrough defects. Fixed indentation in the other semicolon test above it. Suggested-by:
Peter Senna Tschudin <peter.senna@gmail.com> Signed-off-by:
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Joe Perches authored
spinlock_t should always be used. Signed-off-by:
"Luis R. Rodriguez" <mcgrof@do-not-panic.com> Signed-off-by:
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Joe Perches authored
Blank lines around braces are not unnecessary. Emit a message on the use of these blank lines only when using --strict. int foo(int bar) { something or other.... } is generally written in the kernel as: int foo(int bar) { something or other... } Signed-off-by: -
Joe Perches authored
Preprocessor directives and asm statements should be allowed to have a line continuation. Signed-off-by:
Jingoo Han <jg1.han@samsung.com> Signed-off-by:
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Joe Perches authored
Some projects might want a longer line length so allow a command line --max-line-length=n control over the long line warnings. The default line length is 80. Signed-off-by:
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Andy Whitcroft authored
Consolidate the if (foo) bar(foo) detectors into a single check. Add debugfs_remove and family. Based on a patch by Constantine Shulyupin. Signed-off-by:
Andy Whitcroft <apw@canonical.com> Cc: Constantine Shulyupin <const@MakeLinux.com>. Cc: Joe Perches <joe@perches.com> Signed-off-by:
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Tao Ma authored
In commit 9c0ece06 ("Get rid of Documentation/feature-removal.txt"), Linus removes feature-removal-schedule.txt from Documentation, but there is still some reference to this file. So remove them. Signed-off-by:
Tao Ma <boyu.mt@taobao.com> Acked-by:
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Kees Cook authored
This config item has not carried much meaning for a while now and is almost always enabled by default. As agreed during the Linux kernel summit, it is being removed. This will discourage future addition of CONFIG_EXPERIMENTAL while it is being phased out. Signed-off-by:
Kees Cook <keescook@chromium.org> Cc: Andy Whitcroft <apw@canonical.com> Cc: Joe Perches <joe@perches.com> Signed-off-by:
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Joe Perches authored
When the previous line is not a line continuation and the current line has a line continuation but is not a #define, emit a warning. Signed-off-by:
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Catalin Marinas authored
This function is used by sparc, powerpc tile and arm64 for compat support. The patch adds a generic implementation with a wrapper for PowerPC to do the u32->int sign extension. The reason for a single patch covering powerpc, tile, sparc and arm64 is to keep it bisectable, otherwise kernel building may fail with mismatched function declarations. Signed-off-by:
Catalin Marinas <catalin.marinas@arm.com> Acked-by: Chris Metcalf <cmetcalf@tilera.com> [for tile] Acked-by:
David S. Miller <davem@davemloft.net> Acked-by:
Arnd Bergmann <arnd@arndb.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Signed-off-by:
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Cong Ding authored
Fix this warning: lib/rbtree_test.c: In function `check': lib/rbtree_test.c:121: warning: `blacks' may be used uninitialized in this function Signed-off-by:
Cong Ding <dinggnu@gmail.com> Cc: Michel Lespinasse <walken@google.com> Signed-off-by:
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Oleg Nesterov authored
Currently only block_dev and uprobes use percpu_rw_semaphore, add the config option selected by BLOCK || UPROBES. Signed-off-by:
Oleg Nesterov <oleg@redhat.com> Cc: Anton Arapov <anton@redhat.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Michal Marek <mmarek@suse.cz> Cc: Mikulas Patocka <mpatocka@redhat.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Signed-off-by:
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Oleg Nesterov authored
Add lockdep annotations. Not only this can help to find the potential problems, we do not want the false warnings if, say, the task takes two different percpu_rw_semaphore's for reading. IOW, at least ->rw_sem should not use a single class. This patch exposes this internal lock to lockdep so that it represents the whole percpu_rw_semaphore. This way we do not need to add another "fake" ->lockdep_map and lock_class_key. More importantly, this also makes the output from lockdep much more understandable if it finds the problem. In short, with this patch from lockdep pov percpu_down_read() and percpu_up_read() acquire/release ->rw_sem for reading, this matches the actual semantics. This abuses __up_read() but I hope this is fine and in fact I'd like to have down_read_no_lockdep() as well, percpu_down_read_recursive_readers() will need it. Signed-off-by:
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Oleg Nesterov authored
percpu_rw_semaphore->writer_mutex was only added to simplify the initial rewrite, the only thing it protects is clear_fast_ctr() which otherwise could be called by multiple writers. ->rw_sem is enough to serialize the writers. Kill this mutex and add "atomic_t write_ctr" instead. The writers increment/decrement this counter, the readers check it is zero instead of mutex_is_locked(). Move atomic_add(clear_fast_ctr(), slow_read_ctr) under down_write() to avoid the race with other writers. This is a bit sub-optimal, only the first writer needs this and we do not need to exclude the readers at this stage. But this is simple, we do not want another internal lock until we add more features. And this speeds up the write-contended case. Before this patch the racing writers sleep in synchronize_sched_expedited() sequentially, with this patch multiple synchronize_sched_expedited's can "overlap" with each other. Note: we can do more optimizations, this is only the first step. Signed-off-by:
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Oleg Nesterov authored
Currently the writer does msleep() plus synchronize_sched() 3 times to acquire/release the semaphore, and during this time the readers are blocked completely. Even if the "write" section was not actually started or if it was already finished. With this patch down_write/up_write does synchronize_sched() twice and down_read/up_read are still possible during this time, just they use the slow path. percpu_down_write() first forces the readers to use rw_semaphore and increment the "slow" counter to take the lock for reading, then it takes that rw_semaphore for writing and blocks the readers. Also. With this patch the code relies on the documented behaviour of synchronize_sched(), it doesn't try to pair synchronize_sched() with barrier. Signed-off-by:
Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mikulas Patocka <mpatocka@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Anton Arapov <anton@redhat.com> Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by:
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