- 03 May, 2016 11 commits
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Mathieu Poirier authored
According to the TRM before programming the TMC in circular buffer mode (and that for any configuration, ETB, ETR, ETF), the TMCReady bit in the status register has to be set. This patch adds a check to make sure the state machine is in a state where it can be configured, and complains otherwise. Signed-off-by:
Mathieu Poirier <mathieu.poirier@linaro.org> Reviewed-by:
Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Mathieu Poirier authored
According to the TMC architectural state machine, the 'stopped' state is reached when bit 2 (TMCReady) of the TMC Status register turns to '1'. The code is correct but the naming convention isn't. The 'Triggered' bit occupies position '1' of the TMC Status register and has nothing to do with the indication of the TMC entering the stopped state. As such renaming function "tmc_wait_for_triggered()" and changing the #define to reflect what the code is really doing. This patch has no effect other than clarifying the semantic. Signed-off-by:
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Mathieu Poirier authored
Adding management registers that convey implementation specific characteristics. Those are useful for trace configuration and collection along with general trouble shooting. Signed-off-by:
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Li Pengcheng authored
This patch adds a cellID for the ETMv4 tracer found on HiSillicon's A72 Maia processor. Signed-off-by:
Li Pengcheng <lipengcheng8@huawei.com> Signed-off-by:
Li Zhong <lizhong11@hisilicon.com> Signed-off-by:
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Mathieu Poirier authored
This patch rectifies the amount of words to read when the internal buffer is deemed bigger than the amount of space available in the perf ring buffer. The amount to read is set to the amount of space in the perf ring buffer rather than being subtracted by it. Reported-by:
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Pratik Patel authored
This driver adds support for the STM CoreSight IP block, allowing any system compoment (HW or SW) to log and aggregate messages via a single entity. The CoreSight STM exposes an application defined number of channels called stimulus port. Configuration is done using entries in sysfs and channels made available to userspace via configfs. Signed-off-by:
Pratik Patel <pratikp@codeaurora.org> Signed-off-by:
Michael Williams <michael.williams@arm.com> Signed-off-by:
Chunyan Zhang <zhang.chunyan@linaro.org> Signed-off-by:
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Mathieu Poirier authored
The System Trace Macrocell (STM) is an IP block falling under the CoreSight umbrella. It's main purpose it so expose stimulus channels to any system component for the purpose of information logging. Bindings for this IP block adds a couple of items to the current mandatory definition for CoreSight components. Signed-off-by:
Rob Herring <robh@kernel.org> Signed-off-by:
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Mathieu Poirier authored
>From a core framework point of view an STM device is a source that is treated the same way as any other tracers. Unlike tracers though STM devices are not associated with a CPU. As such it doesn't make sense to associate the path from an STM device to its sink with a per-cpu variable as it is done for tracers. This patch simply adds another global variable to keep STM paths and the processing in coresight_enable/disable() is updated to deal with STM devices properly. Signed-off-by:
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Alexander Shishkin authored
Some STM devices adjust software assigned master numbers depending on the trace source and its runtime state and whatnot. This patch adds a sysfs attribute to inform the trace-side software that master numbers assigned to software sources will not match those in the STP stream, so that, for example, master/channel allocation policy can be adjusted accordingly. Signed-off-by:
Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by:
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Li Pengcheng authored
Because this operation exceed the range of boolean, so we should modify q_support to unit8 bit. drvdata->q_support = BMVAL(etmidr0, 15, 16) Signed-off-by:
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Li Pengcheng authored
activated and enable are already unsigned type, no need to change them to unsigned. Signed-off-by:
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- 01 May, 2016 29 commits
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Ben Sen authored
Since many temperature sensors come "preconfigured" with a lower precision, people are stuck at that precision when running on a kernel based device (unlike the Dallas 1Wire library for e.g. Arduino, which supports writing the configuration/scratchpad). This patch adds write support for the scratchpad/precision registers via w1_slave sysfs. Signed-off-by:
Ben Sen <0.x29a.0@gmail.com> Acked-by:
Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by:
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Dan Carpenter authored
Presumably we never use the default: case statement which prints a warning message. But my static checker complains that if we do, we will hit an uninitialized variable warning. Signed-off-by:
Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by:
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Marek Szyprowski authored
To read pid/cid registers, the probed device need to be properly turned on. When it is inside a power domain, the bus code should ensure that the given power domain is enabled before trying to access device's registers. However in some cases power domain (or clocks) might not be yet available. Returning -EPROBE_DEFER is not a solution in such case, because callers don't handle this special error code. Instead such devices are added to the special list and their registration is retried from periodic worker until all resources are available. Signed-off-by:
Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by:
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Daniel Wagner authored
complete_all() should only be called once, doing it twice is a clear bug. 8565adbc ("drivers/misc/ti-st: fix read fw version cmd") added the additional complete_all() call. Since we call complete_all() when leaving the function we can drop the complete_all() call inside true branch of the if statement. Signed-off-by:
Daniel Wagner <daniel.wagner@bmw-carit.de> Cc: Pavan Savoy <pavan_savoy@ti.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by:
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Dan Carpenter authored
It's harmless but, if "enable" isn't set, then we pass uninitialized values to qcom_coincell_chgr_config(). The values aren't used, but let's silence the warning anyway. Signed-off-by:
Tim Bird <tim.bird@sonymobile.com> Signed-off-by:
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Geert Uytterhoeven authored
According to full-history-linux commit d3794f4fa7c3edc3 ("[PATCH] M68k update (part 25)"), port operations are allowed on m68k if CONFIG_ISA is defined. However, commit 153dcc54 ("[PATCH] mem driver: fix conditional on isa i/o support") accidentally changed an "||" into an "&&", disabling it completely on m68k. This logic was retained when introducing the DEVPORT symbol in commit 4f911d64 ("Make /dev/port conditional on config symbol"). Drop the bogus dependency on !M68K to fix this. Fixes: 153dcc54 ("[PATCH] mem driver: fix conditional on isa i/o support") Signed-off-by:Geert Uytterhoeven <geert@linux-m68k.org> Tested-by:
Al Stone <ahs3@redhat.com> Signed-off-by:
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Mathieu Poirier authored
Removing boot time log for drivers that don't report useful information other than they came up properly. The same information can be found in sysFS once the system has booted and as such doesn't provide any value in the boot log. Reported-by:
Mark Brown <broonie@linaro.org> Signed-off-by:
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Mathieu Poirier authored
The sysFS "status" entry conveys a wealth of information about the status of the HW but goes agains the sysFS rule of one topic per file. This patch rectify the situation by adding read-only entries for each of the field formaly displayed by "status". The ABI documentation is kept up to date. Signed-off-by:
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Mathieu Poirier authored
Macro "coresight_simple_func()" can be used by several drivers. As such making the structure type generic and moving to a globally available header file. That way individual drivers can use the functionality by simply specifying the structure they need to work with. Signed-off-by:
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Mathieu Poirier authored
Adding a set of API allowing the Perf core to treat ETMv4 tracers like other PMUs. Signed-off-by:
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Mathieu Poirier authored
Adding new mode to limit tracing to kernel or user space. Signed-off-by:
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Mathieu Poirier authored
Similarly to ETMv3, moving etmv4_drvdata::enable to an atomic type that gives the 'mode' of a tracer and prevents multiple, simultanious access by different subsystems. Signed-off-by:
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Mathieu Poirier authored
As with the ETMv3.x driver, calling 'smp_call_function_single()' twice in a row is highly ineffective. As such moving function 'etm4_os_unlock()' before the default initialisation takes place, which results in the same outcome. Signed-off-by:
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Mathieu Poirier authored
Splitting and updating the default initialisation for each etmv4 configuration so that it can be called at the beginning of each session rather than initialisation time only. Since the trace ID isn't expected to change with every session, moving it with the default tracer initialisation. Signed-off-by:
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Mathieu Poirier authored
Similar to what was done on etm3x, splitting driver structure etmv4_drvdata in two. One half is concerned with the HW characteristics that are generally static in nature. The other half deals with user configuration and will change from one trace session to another. No gain/loss of functionality is incurred from this patch. Signed-off-by:
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Mathieu Poirier authored
Adding new sysFS management interface to query the configuration and the traceid registers. Both are required to convey information to the perf cmd line tools when using ETMv4 tracers as PMU. Signed-off-by:
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Mathieu Poirier authored
As with the etm3x driver, sysFS entries are big enough to justify their own file. As such moving all sysFS related declarations to a dedicated location. No gain/loss of functionality is incurred from this patch. Signed-off-by:
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Andreas Ziegler authored
Fix a typo in the help message for the -d parameter by removing one 'm'. Signed-off-by:
Andreas Ziegler <andreas.ziegler@fau.de> Acked-by:
Valentin Rothberg <valentinrothberg@gmail.com> Signed-off-by:
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Dan Carpenter authored
My static checker complains that "ret" could be uninitialized at the end, which is true but it's more likely that it would be set to zero. Signed-off-by:
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Arnd Bergmann authored
Every new architecture has to add itself to the growing list of those that do not support the legacy PC RTC driver. This replaces the long list of architectures that don't support it with a shorter list of those that do. The list is taken from those architectures that have a non-empty asm/mc146818rtc.h header file and were not explicitly blacklisted or select RTC_LIB. Alpha and Loongson64 can already choose between this driver and an rtc-class based one. mn10300 is actually the only architecture now that still requires this driver, and that should be fairly easy to change to use rtc-cmos if we want to kill off rtc.ko for good. Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Acked-by:
Alexandre Belloni <alexandre.belloni@free-electrons.com> Acked-by:
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Dan Carpenter authored
If kstrtoint() returns -ERANGE then "tmp" is uninitialized. Signed-off-by:
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Mark Brown authored
The 93xx46 driver is using spi_dev_get() apparently just to take a copy of the SPI device used to instantiate it but never calls spi_dev_put() to free it. Since the device is guaranteed to exist between probe() and remove() there should be no need for the driver to take an extra reference to it so fix the leak by just using a straight assignment. Signed-off-by:
Mark Brown <broonie@kernel.org> Signed-off-by:
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Mark Brown authored
The at25 driver is using spi_dev_get() apparently just to take a copy of the SPI device used to instantiate it but never calls spi_dev_put() to free it. Since the device is guaranteed to exist between probe() and remove() there should be no need for the driver to take an extra reference to it so fix the leak by just using a straight assignment. Signed-off-by:
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Geert Uytterhoeven authored
Signed-off-by:
Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by:
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Mariusz Bialonczyk authored
This commit enables the active pullup (APU bit) by default for the DS2482 1-Wire master. >From the DS2482 datasheet: "The APU bit controls whether an active pullup (controlled slew-rate transistor) or a passive pullup (Rwpu resistor) will be used to drive a 1-Wire line from low to high. When APU = 0, active pullup is disabled (resistor mode). Active Pullup should always be selected unless there is only a single slave on the 1-Wire line." According to the module author, Ben Gardner: "It doesn't look like active pullup would cause any hurt if there is only a single slave." And my tests with multiple and single slaves on 1-Wire bus confirms that. This active pullup can be manually disabled using the introduced module parameter: active_pullup = 0 Signed-off-by: -
Srinivas Kandagatla authored
This patch moves to nvmem support in the driver to use callback instead of regmap. Signed-off-by:
Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by:
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Srinivas Kandagatla authored
This patch moves to nvmem support in the driver to use callback instead of regmap. Signed-off-by:
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Srinivas Kandagatla authored
This patch moves to nvmem support in the driver to use callback instead of regmap. Signed-off-by:
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Srinivas Kandagatla authored
This patch moves to nvmem support in the driver to use callback instead of regmap. Signed-off-by:
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