- 26 Jul, 2012 1 commit
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Philip, Avinash authored
ECAP hardware on AM33XX SOC supports auxiliary PWM (APWM) feature. This commit adds PWM driver support for ECAP hardware on AM33XX SOC. In the ECAP hardware, each PWM pin can also be configured to be in capture mode. Current implementation only supports PWM mode of operation. Also, hardware supports sync between multiple PWM pins but the driver supports simple independent PWM functionality. Reviewed-by:
Vaibhav Bedia <vaibhav.bedia@ti.com> Signed-off-by:
Philip, Avinash <avinashphilip@ti.com> Signed-off-by:
Thierry Reding <thierry.reding@avionic-design.de>
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- 23 Jul, 2012 19 commits
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Thierry Reding authored
Some versions of GCC don't seem no notice that the initialization of the index variable is tied to that of the chip variable and falsely report it as potentially being used uninitialized. However, to save anybody else from tripping over this, we now initialize the index variable unconditionally. Originally-by:
Stephen Warren <swarren@nvidia.com> Signed-off-by:
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Alexandre Pereira da Silva authored
Add lpc32xx SOC PWM driver. Signed-off-by:
Alexandre Pereira da Silva <aletes.xgr@gmail.com> Acked-by:
Roland Stigge <stigge@antcom.de> Signed-off-by:
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Alexandre Courbot authored
pwm_backlight_update_status calls the notify() and notify_after() callbacks before and after applying the new PWM settings. However, if brightness levels are used, the brightness value will be changed from the index into the levels array to the PWM duty cycle length before being passed to notify_after(), which results in inconsistent behavior. Signed-off-by:
Alexandre Courbot <acourbot@nvidia.com> Signed-off-by:
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Sachin Kamat authored
Replace printk with pr_* functions to avoid checkpatch warnings. Signed-off-by:
Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by:
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Axel Lin authored
Signed-off-by:
Axel Lin <axel.lin@gmail.com> Signed-off-by:
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Axel Lin authored
Also return proper error in tegra_pwm_remove() if pwmchip_remove() fails. Signed-off-by:
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Axel Lin authored
Signed-off-by:
Shawn Guo <shawn.guo@linaro.org> Signed-off-by:
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Axel Lin authored
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Thierry Reding authored
If the pwmchip_remove() call fails, propagate the error to the driver's remove callback. This is required to prevent the module from being unloaded if a PWM provided by the driver is still in use. Signed-off-by: -
Axel Lin authored
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Axel Lin authored
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Axel Lin authored
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Thierry Reding authored
In order to avoid duplicate symbols with legacy PWM API implementations, the new PWM framework needs to conflict with any of the existing legacy implementations. This is done in two ways: for implementations provided by drivers, a conflict is added to the driver to ensure it will have to be ported to the PWM subsystem before it can coexist with other PWM providers. For architecture-specific code, the conflict is added to the PWM symbol to avoid confusion when a previously picked platform or machine can no longer be selected because of the PWM subsystem being included. Signed-off-by: -
Shawn Guo authored
Call pinctrl subsystem to set up pwm pin. Signed-off-by:
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Shawn Guo authored
Use devm_* managed functions to have a clean fail-out. Signed-off-by:
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Shawn Guo authored
Use global reset function stmp_reset_block instead of mxs_reset_block to remove <mach/common.h> inclusion. Signed-off-by:
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Shawn Guo authored
Encode soc name in the compatible string to know the specific version hardware block. This is the general approach adopted for most bindings. Change mxs-pwm binding to use the approach. Signed-off-by:
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Thierry Reding authored
I'm taking over the maintainership of the PWM subsystem. This commit also adds the URLs to the gitorious project and repository as well as any missing files related to the PWM subsystem. Acked-by:
Arnd Bergmann <arnd@arndb.de> Acked-by:
Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by:
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Thierry Reding authored
This commit adds very basic support for device tree probing. Currently, only a PWM and a list of distinct brightness levels can be specified. Enabling or disabling backlight power via GPIOs is not yet supported. Reviewed-by:
Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by:
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- 02 Jul, 2012 8 commits
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Shawn Guo authored
Add generic PWM framework driver (DT only) for Freescale MXS. Signed-off-by:
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Sascha Hauer authored
Move the driver to drivers/pwm/ and convert it to use the framework. Signed-off-by:
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Sascha Hauer authored
Move the driver to drivers/pwm/ and convert it to use the framework. Signed-off-by:
Eric Bénard <eric@eukrea.com> Signed-off-by:
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Sascha Hauer authored
Move the driver to drivers/pwm/ and convert it to use the framework. Signed-off-by:
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Thierry Reding authored
This commit moves the PXA PWM driver to the drivers/pwm subdirectory and converts it to use the new PWM framework. Signed-off-by: -
Thierry Reding authored
This commit moves the Blackfin PWM driver to the drivers/pwm sub- directory and converts it to register with the new PWM framework. Signed-off-by: -
Thierry Reding authored
Add auxdata to instantiate the PWFM controller from a device tree, include the corresponding nodes in the dtsi files for Tegra 20 and Tegra 30 and add binding documentation. Acked-by:
Stephen Warren <swarren@wwwdotorg.org> Signed-off-by:
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Thierry Reding authored
This commit adds a generic PWM framework driver for the PWFM controller found on NVIDIA Tegra SoCs. The driver is based on code from the Chromium kernel tree and was originally written by Gary King (NVIDIA) and later modified by Simon Que (Chromium). Acked-by:
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- 15 Jun, 2012 7 commits
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Thierry Reding authored
This patch adds helpers to support device tree bindings for the generic PWM API. Device tree binding documentation for PWM controllers is also provided. Acked-by:
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Thierry Reding authored
This commit adds an empty of_parse_phandle_with_args() function for !CONFIG_OF builds. Acked-by:
Rob Herring <rob.herring@calxeda.com> Signed-off-by:
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Thierry Reding authored
This commit adds an empty of_property_match_string() function for !CONFIG_OF builds. Acked-by:
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Thierry Reding authored
In order to get rid of the global namespace for PWM devices, this commit provides an alternative method, similar to that of the regulator or clock frameworks, for registering a static mapping for PWM devices. This works by providing a table with a provider/consumer map in the board setup code. With the new pwm_get() and pwm_put() functions available, usage of pwm_request() and pwm_free() becomes deprecated. Reviewed-by:
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Thierry Reding authored
This commit adds a debugfs interface that can be used to list the current internal state of the PWM devices registered with the PWM framework. Reviewed-by:
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Thierry Reding authored
Many PWM controllers provide access to more than a single PWM output and may even share some resource among them. Allowing a PWM chip to provide multiple PWM devices enables better sharing of those resources. As a side-effect this change allows easy integration with the device tree where a given PWM can be looked up based on the PWM chip's phandle and a corresponding index. This commit modifies the PWM core to support multiple PWMs per struct pwm_chip. It achieves this in a similar way to how gpiolib works, by allowing PWM ranges to be requested dynamically (pwm_chip.base == -1) or starting at a given offset (pwm_chip.base >= 0). A chip specifies how many PWMs it controls using the npwm member. Each of the functions in the pwm_ops structure gets an additional argument that specified the PWM number (it can be converted to a per-chip index by subtracting the chip's base). The total maximum number of PWM devices is currently fixed to 1024 while the data is actually stored in a radix tree, thus saving resources if not all of them are used. Reviewed-by:
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Sascha Hauer authored
This patch adds framework support for PWM (pulse width modulation) devices. The is a barebone PWM API already in the kernel under include/linux/pwm.h, but it does not allow for multiple drivers as each of them implements the pwm_*() functions. There are other PWM framework patches around from Bill Gatliff. Unlike his framework this one does not change the existing API for PWMs so that this framework can act as a drop in replacement for the existing API. Why another framework? Several people argue that there should not be another framework for PWMs but they should be integrated into one of the existing frameworks like led or hwmon. Unlike these frameworks the PWM framework is agnostic to the purpose of the PWM. In fact, a PWM can drive a LED, but this makes the LED framework a user of a PWM, like already done in leds-pwm.c. The gpio framework also is not suitable for PWMs. Every gpio could be turned into a PWM using timer based toggling, but on the other hand not every PWM hardware device can be turned into a gpio due to the lack of hardware capabilities. This patch does not try to improve the PWM API yet, this could be done in subsequent patches. Signed-off-by:
Kurt Van Dijck <kurt.van.dijck@eia.be> Reviewed-by:
Matthias Kaehlcke <matthias@kaehlcke.net> Reviewed-by:
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- 09 Jun, 2012 1 commit
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Linus Torvalds authored
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- 08 Jun, 2012 4 commits
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David Rientjes authored
If the privileges given to root threads (3% of allowable memory) or a negative value of /proc/pid/oom_score_adj happen to exceed the amount of rss of a thread, its badness score overflows as a result of commit a7f638f9 ("mm, oom: normalize oom scores to oom_score_adj scale only for userspace"). Fix this by making the type signed and return 1, meaning the thread is still eligible for kill, if the value is negative. Reported-by:
Dave Jones <davej@redhat.com> Acked-by:
Oleg Nesterov <oleg@redhat.com> Signed-off-by:
David Rientjes <rientjes@google.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull scheduler fixes from Ingo Molnar. * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: sched: Fix the relax_domain_level boot parameter sched: Validate assumptions in sched_init_numa() sched: Always initialize cpu-power sched: Fix domain iteration sched/rt: Fix lockdep annotation within find_lock_lowest_rq() sched/numa: Load balance between remote nodes sched/x86: Calculate booted cores after construction of sibling_mask
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Randy Dunlap authored
Fix lots of new kernel-doc warnings in kernel/sched/fair.c: Warning(kernel/sched/fair.c:3625): No description found for parameter 'env' Warning(kernel/sched/fair.c:3625): Excess function parameter 'sd' description in 'update_sg_lb_stats' Warning(kernel/sched/fair.c:3735): No description found for parameter 'env' Warning(kernel/sched/fair.c:3735): Excess function parameter 'sd' description in 'update_sd_pick_busiest' Warning(kernel/sched/fair.c:3735): Excess function parameter 'this_cpu' description in 'update_sd_pick_busiest' .. more warnings Signed-off-by:
Randy Dunlap <rdunlap@xenotime.net> Cc: Ingo Molnar <mingo@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by:
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Linus Torvalds authored
This reverts commit 9e612a00. It incorrectly finds VGA connectors where none are attached, apparently not noticing that nothing replied to the EDID queries, and happily using the default EDID modes that have nothing to do with actual hardware. That in turn then causes X to fall down to the lowest common denominator, which is usually the default 1024x768 mode that is in the default EDID and pretty much anything supports). I'd suggest that if not relying on the HDP pin, the code should at least check whether it gets valid EDID data back, rather than just assume there's something on the VGA connector. Cc: Dave Airlie <airlied@linux.ie> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by:
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