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2015-09-04Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linuxLinus Torvalds1-0/+13
Pull drm updates from Dave Airlie: "This is the main pull request for the drm for 4.3. Nouveau is probably the biggest amount of changes in here, since it missed 4.2. Highlights below, along with the usual bunch of fixes. All stuff outside drm should have applicable acks. Highlights: - new drivers: freescale dcu kms driver - core: more atomic fixes disable some dri1 interfaces on kms drivers drop fb panic handling, this was just getting more broken, as more locking was required. new core fbdev Kconfig support - instead of each driver enable/disabling it struct_mutex cleanups - panel: more new panels cleanup Kconfig - i915: Skylake support enabled by default legacy modesetting using atomic infrastructure Skylake fixes GEN9 workarounds - amdgpu: Fiji support CGS support for amdgpu Initial GPU scheduler - off by default Lots of bug fixes and optimisations. - radeon: DP fixes misc fixes - amdkfd: Add Carrizo support for amdkfd using amdgpu. - nouveau: long pending cleanup to complete driver, fully bisectable which makes it larger, perfmon work more reclocking improvements maxwell displayport fixes - vmwgfx: new DX device support, supports OpenGL 3.3 screen targets support - mgag200: G200eW support G200e new revision support - msm: dragonboard 410c support, msm8x94 support, msm8x74v1 support yuv format support dma plane support mdp5 rotation initial hdcp - sti: atomic support - exynos: lots of cleanups atomic modesetting/pageflipping support render node support - tegra: tegra210 support (dc, dsi, dp/hdmi) dpms with atomic modesetting support - atmel: support for 3 more atmel SoCs new input formats, PRIME support. - dwhdmi: preparing to add audio support - rockchip: yuv plane support" * 'drm-next' of git://people.freedesktop.org/~airlied/linux: (1369 commits) drm/amdgpu: rename gmc_v8_0_init_compute_vmid drm/amdgpu: fix vce3 instance handling drm/amdgpu: remove ib test for the second VCE Ring drm/amdgpu: properly enable VM fault interrupts drm/amdgpu: fix warning in scheduler drm/amdgpu: fix buffer placement under memory pressure drm/amdgpu/cz: fix cz_dpm_update_low_memory_pstate logic drm/amdgpu: fix typo in dce11 watermark setup drm/amdgpu: fix typo in dce10 watermark setup drm/amdgpu: use top down allocation for non-CPU accessible vram drm/amdgpu: be explicit about cpu vram access for driver BOs (v2) drm/amdgpu: set MEC doorbell range for Fiji drm/amdgpu: implement burst NOP for SDMA drm/amdgpu: add insert_nop ring func and default implementation drm/amdgpu: add amdgpu_get_sdma_instance helper function drm/amdgpu: add AMDGPU_MAX_SDMA_INSTANCES drm/amdgpu: add burst_nop flag for sdma drm/amdgpu: add count field for the SDMA NOP packet v2 drm/amdgpu: use PT for VM sync on unmap drm/amdgpu: make wait_event uninterruptible in push_job ...
2015-08-17gpiolib: irqchip: use different lockdep class for each gpio irqchipGrygorii Strashko1-13/+14
Since IRQ chip helpers were introduced drivers lose ability to register separate lockdep classes for each registered GPIO IRQ chip and the gpiolib now is using shared lockdep class for all GPIO IRQ chips (gpiochip_irq_lock_class). As result, lockdep will produce warning when there are min two stacked GPIO chips and all of them are interrupt controllers. HW configuration which generates lockdep warning (TI dra7-evm): [SOC GPIO bankA.gpioX] <- irq - [pcf875x.gpioY] <- irq - DevZ.enable_irq_wake(pcf_gpioY_irq); The issue was reported in [1] and discussed [2]. ============================================= [ INFO: possible recursive locking detected ] 4.2.0-rc6-00013-g5d050ed-dirty #55 Not tainted --------------------------------------------- sh/63 is trying to acquire lock: (class){......}, at: [<c009b91c>] __irq_get_desc_lock+0x50/0x94 but task is already holding lock: (class){......}, at: [<c009b91c>] __irq_get_desc_lock+0x50/0x94 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(class); lock(class); *** DEADLOCK *** May be due to missing lock nesting notation 7 locks held by sh/63: #0: (sb_writers#4){.+.+.+}, at: [<c016bbb8>] vfs_write+0x13c/0x164 #1: (&of->mutex){+.+.+.}, at: [<c01debf4>] kernfs_fop_write+0x4c/0x1a0 #2: (s_active#36){.+.+.+}, at: [<c01debfc>] kernfs_fop_write+0x54/0x1a0 #3: (pm_mutex){+.+.+.}, at: [<c009758c>] pm_suspend+0xec/0x4c4 #4: (&dev->mutex){......}, at: [<c03f77f8>] __device_suspend+0xd4/0x398 #5: (&gpio->lock){+.+.+.}, at: [<c009b940>] __irq_get_desc_lock+0x74/0x94 #6: (class){......}, at: [<c009b91c>] __irq_get_desc_lock+0x50/0x94 stack backtrace: CPU: 0 PID: 63 Comm: sh Not tainted 4.2.0-rc6-00013-g5d050ed-dirty #55 Hardware name: Generic DRA74X (Flattened Device Tree) [<c0016e24>] (unwind_backtrace) from [<c0013338>] (show_stack+0x10/0x14) [<c0013338>] (show_stack) from [<c05f6b24>] (dump_stack+0x84/0x9c) [<c05f6b24>] (dump_stack) from [<c00903f4>] (__lock_acquire+0x19c0/0x1e20) [<c00903f4>] (__lock_acquire) from [<c0091098>] (lock_acquire+0xa8/0x128) [<c0091098>] (lock_acquire) from [<c05fd61c>] (_raw_spin_lock_irqsave+0x38/0x4c) [<c05fd61c>] (_raw_spin_lock_irqsave) from [<c009b91c>] (__irq_get_desc_lock+0x50/0x94) [<c009b91c>] (__irq_get_desc_lock) from [<c009c4f4>] (irq_set_irq_wake+0x20/0xfc) [<c009c4f4>] (irq_set_irq_wake) from [<c0393ac4>] (pcf857x_irq_set_wake+0x24/0x54) [<c0393ac4>] (pcf857x_irq_set_wake) from [<c009c560>] (irq_set_irq_wake+0x8c/0xfc) [<c009c560>] (irq_set_irq_wake) from [<c04a02ac>] (gpio_keys_suspend+0x70/0xd4) [<c04a02ac>] (gpio_keys_suspend) from [<c03f6a00>] (dpm_run_callback+0x50/0x124) [<c03f6a00>] (dpm_run_callback) from [<c03f7830>] (__device_suspend+0x10c/0x398) [<c03f7830>] (__device_suspend) from [<c03f90f0>] (dpm_suspend+0x134/0x2f4) [<c03f90f0>] (dpm_suspend) from [<c0096e20>] (suspend_devices_and_enter+0xa8/0x728) [<c0096e20>] (suspend_devices_and_enter) from [<c00977cc>] (pm_suspend+0x32c/0x4c4) [<c00977cc>] (pm_suspend) from [<c0096060>] (state_store+0x64/0xb8) [<c0096060>] (state_store) from [<c01dec64>] (kernfs_fop_write+0xbc/0x1a0) [<c01dec64>] (kernfs_fop_write) from [<c016b280>] (__vfs_write+0x20/0xd8) [<c016b280>] (__vfs_write) from [<c016bb0c>] (vfs_write+0x90/0x164) [<c016bb0c>] (vfs_write) from [<c016c330>] (SyS_write+0x44/0x9c) [<c016c330>] (SyS_write) from [<c000f500>] (ret_fast_syscall+0x0/0x54) Lets fix it by using separate lockdep class for each registered GPIO IRQ Chip. This is done by wrapping gpiochip_irqchip_add call into macros. The implementation of this patch inspired by solution done by Nicolas Boichat for regmap [3] [1] http://www.spinics.net/lists/linux-gpio/msg05844.html [2] http://www.spinics.net/lists/linux-gpio/msg06021.html [3] http://www.spinics.net/lists/arm-kernel/msg429834.html Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Roger Quadros <rogerq@ti.com> Reported-by: Roger Quadros <rogerq@ti.com> Tested-by: Roger Quadros <rogerq@ti.com> Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-08-03gpio: don't override irq_*_resources() callbacksRabin Vincent1-2/+10
If the driver has specified its own irq_{request/release}_resources() functions, don't override them. The gpio-etraxfs driver will use this. Signed-off-by: Rabin Vincent <rabin@rab.in> [Added a small comment blurb] Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-07-28gpio: defer probe if pinctrl cannot be foundTomeu Vizoso1-1/+4
When an OF node has a pin range for its GPIOs, return -EPROBE_DEFER if the pin controller isn't available. Otherwise, the GPIO range wouldn't be set at all unless the pin controller probed always before the GPIO chip. With this change, the probe of the GPIO chip will be deferred and will be retried at a later point, hopefully once the pin controller has been registered and probed already. Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-07-28gpio: kill off set_irq_flags usageRob Herring1-7/+1
set_irq_flags is ARM specific with custom flags which have genirq equivalents. Convert drivers to use the genirq interfaces directly, so we can kill off set_irq_flags. The translation of flags is as follows: IRQF_VALID -> !IRQ_NOREQUEST IRQF_PROBE -> !IRQ_NOPROBE IRQF_NOAUTOEN -> IRQ_NOAUTOEN For IRQs managed by an irqdomain, the irqdomain core code handles clearing and setting IRQ_NOREQUEST already, so there is no need to do this in .map() functions and we can simply remove the set_irq_flags calls. Some users also modify IRQ_NOPROBE and this has been maintained although it is not clear that is really needed as most platforms don't use probing. There appears to be a great deal of blind copy and paste of this code. Signed-off-by: Rob Herring <robh@kernel.org> Cc: Michael Hennerich <michael.hennerich@analog.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Cc: Alexandre Courbot <gnurou@gmail.com> Cc: Ray Jui <rjui@broadcom.com> Cc: Stephen Warren <swarren@wwwdotorg.org> Cc: Thierry Reding <thierry.reding@gmail.com> Cc: linux-gpio@vger.kernel.org Cc: bcm-kernel-feedback-list@broadcom.com Cc: linux-tegra@vger.kernel.org Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-07-27gpio: remove unneeded initializer in gpiochip_add_to_list()Masahiro Yamada1-1/+1
This variable is used as an iterator and initialized in the list_for_each() loop. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-07-21gpiolib: Add support for removing registered consumer lookup tableShobhit Kumar1-0/+13
In case we unload and load a driver module again that is registering a lookup table, without this it will result in multiple entries. Provide an option to remove the lookup table on driver unload Cc: Samuel Ortiz <sameo@linux.intel.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Alexandre Courbot <gnurou@gmail.com> Cc: Thierry Reding <thierry.reding@gmail.com> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Shobhit Kumar <shobhit.kumar@intel.com> Acked-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2015-07-17Merge branch 'queue/irq/gpio' of ↵Linus Walleij1-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into devel
2015-07-17Merge tag 'gpiod-flags-for-4.3' of git://git.pengutronix.de/git/ukl/linux ↵Linus Walleij1-8/+8
into devel The last patch in this series makes the flags parameter for the various gpiod_get* functions mandatory and so allows to remove an ugly cpp hack introduced in commit 39b2bbe3d715 (gpio: add flags argument to gpiod_get*() functions) for v3.17-rc1. The other nine commits fix the last remaining users of these functions that don't pass flags yet. (Only etraxfs-uart wasn't fixed; this driver's use of the gpiod functions needs fixing anyhow.)
2015-07-16gpiolib: assign chip owner to dev->driver->owner if not setGrygorii Strashko1-0/+3
Assign GPIO chip owner field to chip->dev->driver->owner if it was not configured by GPIO driver. Cc: Johan Hovold <johan@kernel.org> Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Acked-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-07-16gpiolib: irqchip: prevent driver unloading if gpio is used as irq onlyGrygorii Strashko1-0/+5
Now nothing prevents GPIO driver from being unloaded if its gpios were requested as GPIO IRQs only (without calling gpio_request()). Hence, add calls of try_module_get()/module_put() into gpiochip_irq_reqres/relres() to track such scenario properly. Cc: Johan Hovold <johan@kernel.org> Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-07-16gpiolib: Fix docs for gpiochip_add_pingroup_rangeTomeu Vizoso1-1/+1
gpiochip_add_pingroup_range() has a pctldev argument, not pinctrl. Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-07-14gpiolib: Consolidate chained IRQ handler install/removeThomas Gleixner1-2/+2
Chained irq handlers usually set up handler data as well. We now have a function to set both under irq_desc->lock. Replace the two calls with one. Search and conversion was done with coccinelle: Reported-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Julia Lawall <Julia.Lawall@lip6.fr> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Alexandre Courbot <gnurou@gmail.com> Cc: linux-gpio@vger.kernel.org
2015-07-06gpio: make flags mandatory for gpiod_get functionsUwe Kleine-König1-8/+8
Now that all[1] users of the gpiod_get functions are converted to make use of the up to now optional flags parameter, make it mandatory which allows to remove some cpp magic. [1] all but etraxfs-uart which is broken anyhow and I'm allowed to ignore it by Jesper Nilsson :-) Acked-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
2015-06-26Merge branches 'acpi-video', 'device-properties', 'pm-sleep' and 'pm-cpuidle'Rafael J. Wysocki1-2/+2
* acpi-video: ACPI / video: Inline acpi_video_set_dmi_backlight_type * device-properties: ACPI / OF: Rename of_node() and acpi_node() to to_of_node() and to_acpi_node() * pm-sleep: PM / sleep: Increase default DPM watchdog timeout to 60 PM / hibernate: re-enable nonboot cpus on disable_nonboot_cpus() failure * pm-cpuidle: tick/idle/powerpc: Do not register idle states with CPUIDLE_FLAG_TIMER_STOP set in periodic mode
2015-06-24ACPI / OF: Rename of_node() and acpi_node() to to_of_node() and to_acpi_node()Alexander Sverdlin1-2/+2
Commit 8a0662d9 introduced of_node and acpi_node symbols in global namespace but there were already ~63 of_node local variables or function parameters (no single acpi_node though, but anyway). After debugging undefined but used of_node local varible (which turned out to reference static function of_node() instead) it became clear that the names for the functions are too short and too generic for global scope. Signed-off-by: Alexander Sverdlin <alexander.sverdlin@gmail.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-06-23Merge tag 'gpio-v4.2-1' of ↵Linus Torvalds1-49/+63
git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio Pull gpio updates from Linus Walleij: "This is the big bulk of GPIO changes queued for the v4.2 kernel series: - a big set of cleanups to the aged sysfs interface from Johan Hovold. To get these in, v4.1-rc3 was merged into the tree as the first patch in that series had to go into stable. This makes the locking much more fine-grained (get rid of the "big GPIO lock(s)" and store states in the GPIO descriptors. - rename gpiod_[g|s]et_array() to gpiod_[g|s]et_array_value() to avoid confusions. - New drivers for: * NXP LPC18xx (currently LPC1850) * NetLogic XLP * Broadcom STB SoC's * Axis ETRAXFS * Zynq Ultrascale+ (subdriver) - ACPI: * make it possible to retrieve GpioInt resources from a GPIO device using acpi_dev_gpio_irq_get() * merge some dependent I2C changes exploiting this. * support the ARM X-Gene GPIO standby driver. - make it possible for the generic GPIO driver to read back the value set registers to reflect current status. - loads of OMAP IRQ handling fixes. - incremental improvements to Kona, max732x, OMAP, MXC, RCAR, PCA953x, STP-XWAY, PCF857x, Crystalcove, TB10x. - janitorial (constification, checkpatch cleanups)" * tag 'gpio-v4.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (71 commits) gpio: Fix checkpatch.pl issues gpio: pcf857x: handle only enabled irqs gpio / ACPI: Return -EPROBE_DEFER if the gpiochip was not found GPIO / ACPI: export acpi_gpiochip_request(free)_interrupts for module use gpio: improve error reporting on own descriptors gpio: promote own request failure to pr_err() gpio: Added support to Zynq Ultrascale+ MPSoC gpio: add ETRAXFS GPIO driver fix documentation after renaming gpiod_set_array to gpiod_set_array_value gpio: Add GPIO support for Broadcom STB SoCs gpio: xgene: add ACPI support for APM X-Gene GPIO standby driver gpio: tb10x: Drop unneeded free_irq() call gpio: crystalcove: set IRQCHIP_SKIP_SET_WAKE for the irqchip gpio: stp-xway: Use the of_property_read_u32 helper gpio: pcf857x: Check for irq_set_irq_wake() failures gpio-stp-xway: Fix enabling the highest bit of the PHY LEDs gpio: Prevent an integer overflow in the pca953x driver gpio: omap: rework omap_gpio_irq_startup to handle current pin state properly gpio: omap: rework omap_gpio_request to touch only gpio specific registers gpio: omap: rework omap_x_irq_shutdown to touch only irqs specific registers ...
2015-06-16gpio: Fix checkpatch.pl issuesDaniel Lockyer1-10/+7
This patch fixes some issues given by checkpatch. Fixes include bracket placement, spacing and indenting. Signed-off-by: Daniel Lockyer <thisisdaniellockyer@gmail.com> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-06-10gpio: improve error reporting on own descriptorsLinus Walleij1-2/+4
When requesting own descriptors through hogs, it is useful to get some details about what's going on if we encounter problems. Acked-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-06-10gpio: promote own request failure to pr_err()Linus Walleij1-2/+2
These error messages are helpful to see that we fail to get hogs. Promote them to real errors so they appear in the boot crawl. Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-06-01gpiolib: rename gpiod_set_array to gpiod_set_array_valueRojhalat Ibrahim1-25/+29
There have been concerns that the function names gpiod_set_array() and gpiod_get_array() might be confusing to users. One might expect gpiod_get_array() to return array values, while it is actually the array counterpart of gpiod_get(). To be consistent with the single descriptor API we could rename gpiod_set_array() to gpiod_set_array_value(). This makes some function names a bit lengthy: gpiod_set_raw_array_value_cansleep(). Signed-off-by: Rojhalat Ibrahim <imr@rtschenk.de> Acked-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-05-19Drivers: gpio: Fix spelling errorsColin Cronin1-5/+5
Fixed several spelling errors in gpio-lynxpoint, gpio-pca953x, gpio-tegra, gpio-zynq, gpiolib-of, gpiolib. Signed-off-by: Colin Cronin <colinpatrickcronin@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-05-13gpiolib: cleanup chained handler and dataDmitry Eremin-Solenikov1-0/+7
Clean up chained handler and handler data if they were set by gpiochip_set_chained_irqchip(). Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-05-12gpio: fix gpio leak in gpiochip_add error pathJohan Hovold1-4/+6
Make sure to free any hogged gpios on errors in gpiochip_add. Also move all forward declarations to the top of the file. Fixes: f625d4601759 ("gpio: add GPIO hogging mechanism") Signed-off-by: Johan Hovold <johan@kernel.org> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-05-12gpio: sysfs: rename gpiochip registration functionsJohan Hovold1-2/+2
Rename the gpio-chip export/unexport functions to the more descriptive names gpiochip_sysfs_register and gpiochip_sysfs_unregister. Signed-off-by: Johan Hovold <johan@kernel.org> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-05-12gpio: clean up gpiochip_removeJohan Hovold1-5/+9
Clean up gpiochip_remove somewhat and only output warning about removing chip with GPIOs requested once. Signed-off-by: Johan Hovold <johan@kernel.org> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-03-19gpio / ACPI: Avoid unnecessary checks in __gpiod_get_index()Rafael J. Wysocki1-7/+9
If dev is NULL in __gpiod_get_index() and both ACPI and OF are enabled, it will be checked twice before the code decides to give up with DT/ACPI lookup, so avoid that. Also use the observation that ACPI_COMPANION() is much more efficient than ACPI_HANDLE(), because the latter uses the former and carries out a check and a pointer dereference on top of it, so replace the ACPI_HANDLE() check with an ACPI_COMPANION() one which does not require the additional IS_ENABLED(CONFIG_ACPI) check too. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-03-05gpiolib: add gpiod_get_array and gpiod_put_array functionsRojhalat Ibrahim1-0/+145
Introduce new functions for conveniently obtaining and disposing of an entire array of GPIOs with one function call. ACPI parts tested by Mika Westerberg, DT parts tested by Rojhalat Ibrahim. Change log: v5: move the ACPI functions to gpiolib-acpi.c v4: - use shorter names for members of struct gpio_descs - rename lut_gpio_count to platform_gpio_count for clarity - add check for successful memory allocation - use ERR_CAST() v3: - rebase on current linux-gpio devel branch - fix ACPI GPIO counting - allow for zero-sized arrays - make the flags argument mandatory for the new functions - clarify documentation v2: change interface Suggested-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Rojhalat Ibrahim <imr@rtschenk.de> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com> Tested-by: Rojhalat Ibrahim <imr@rtschenk.de> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-03-05gpiolib: define gpio suffixes globallyRojhalat Ibrahim1-8/+6
Avoid multiple identical definitions of the gpio suffix strings by putting them into a global constant array. Signed-off-by: Rojhalat Ibrahim <imr@rtschenk.de> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-03-04gpio: add GPIO hogging mechanismBenoit Parrot1-19/+105
Based on Boris Brezillion's work this is a reworked patch of his initial GPIO hogging mechanism. This patch provides a way to initially configure specific GPIO when the GPIO controller is probed. The actual DT scanning to collect the GPIO specific data is performed as part of gpiochip_add(). The purpose of this is to allow specific GPIOs to be configured without any driver specific code. This is particularly useful because board design are getting increasingly complex and given SoC pins can now have more than 10 mux values, a lot of connections are now dependent on external IO muxes to switch various modes. Specific drivers should not necessarily need to be aware of what accounts to a specific board implementation. This board level "description" should be best kept as part of the dts file. Signed-off-by: Benoit Parrot <bparrot@ti.com> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-02-11Merge tag 'gpio-v3.20-1' of ↵Linus Torvalds1-3/+5
git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio Pull GPIO changes from Linus Walleij: "This is the GPIO bulk changes for the v3.20 series: GPIOLIB core changes: - Create and use of_mm_gpiochip_remove() for removing memory-mapped OF GPIO chips - GPIO MMIO library suppports bgpio_set_multiple for switching several lines at once, a feature merged in the last cycle. New drivers: - New driver for the APM X-gene standby GPIO controller - New driver for the Fujitsu MB86S7x GPIO controller Cleanups: - Moved rcar driver to use gpiolib irqchip - Moxart converted to the GPIO MMIO library - GE driver converted to GPIO MMIO library - Move sx150x to irqdomain - Move max732x to irqdomain - Move vx855 to use managed resources - Move dwapb to use managed resources - Clean tc3589x from platform data - Clean stmpe driver to use device tree only probe New subtypes: - sx1506 support in the sx150x driver - Quark 1000 SoC support in the SCH driver - Support X86 in the Xilinx driver - Support PXA1928 in the PXA driver Extended drivers: - max732x supports device tree probe - sx150x supports device tree probe Various minor cleanups and bug fixes" * tag 'gpio-v3.20-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (61 commits) gpio: kconfig: replace PPC_OF with PPC gpio: pxa: add PXA1928 gpio type support dt/bindings: gpio: add compatible string for marvell,pxa1928-gpio gpio: pxa: remove mach IRQ includes gpio: max732x: use an inline function for container cast gpio: use sizeof() instead of hardcoded values gpio: max732x: add set_multiple function gpio: sch: Consolidate similar algorithms gpio: tz1090-pdc: Use resource_size to fix off-by-one resource size calculation gpio: ge: Convert to use devm_kstrdup gpio: correctly use const char * const gpio: sx150x: fixup OF support gpio: mpc8xxx: Use of_mm_gpiochip_remove gpio: Add Fujitsu MB86S7x GPIO driver gpio: mpc8xxx: Convert to platform device interface. gpio: zevio: Use of_mm_gpiochip_remove gpio: gpio-mm-lantiq: Use of_mm_gpiochip_remove gpio: gpio-mm-lantiq: Use of_property_read_u32 gpio: gpio-mm-lantiq: Do not replicate code gpio :gpio-mm-lantiq: Use devm_kzalloc ...
2015-01-30gpio: use sizeof() instead of hardcoded valuesOlliver Schinagl1-2/+4
gpiolib uses a fixed string for the suffixes and defines it at 32 bytes. Later in the code snprintf is used with this fixed value of 32. Using sizeof() is safer in case the size for the suffixes is ever changed. Signed-off-by: Olliver Schinagl <oliver@schinagl.nl> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-01-29gpio: correctly use const char * constOlliver Schinagl1-1/+1
On my previous patch I was overly hasty and made the suffixes string array const char const *suffixes, instaed of const char * const suffixes. This patch corrects that Signed-off-by: Olliver Schinagl <oliver@schinagl.nl> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-01-15gpio:gpiolib: use static const char const * for a suffixes arrayOlliver Schinagl1-1/+1
Checkpatch complains, and probably with good reason that we should use const char const * for the static constant array that never gets changed. Signed-off-by: Olliver Schinagl <oliver@schinagl.nl> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-01-14gpio: unregister gpiochip device before removing itJohan Hovold1-1/+2
Unregister gpiochip device (used to export information through sysfs) before removing it internally. This way removal will reverse addition. Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-01-14gpio: fix sleep-while-atomic in gpiochip_removeJohan Hovold1-3/+1
Move direct and indirect calls to gpiochip_remove_pin_ranges outside of spin lock as they can end up taking a mutex in pinctrl_remove_gpio_range. Note that the pin ranges are already added outside of the lock. Fixes: 9ef0d6f7628b ("gpiolib: call pin removal in chip removal function") Fixes: f23f1516b675 ("gpiolib: provide provision to register pin ranges") Cc: stable <stable@vger.kernel.org> Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-01-14gpio: fix memory leak and sleep-while-atomicJohan Hovold1-1/+2
Fix memory leak and sleep-while-atomic in gpiochip_remove. The memory leak was introduced by afa82fab5e13 ("gpio / ACPI: Move event handling registration to gpiolib irqchip helpers") that moved the release of acpi interrupt resources to gpiochip_irqchip_remove, but by then the resources are no longer accessible as the acpi_gpio_chip has already been freed by acpi_gpiochip_remove. Note that this also fixes a few potential sleep-while-atomics, which has been around since 1425052097b5 ("gpio: add IRQ chip helpers in gpiolib") when the call to gpiochip_irqchip_remove while holding a spinlock was added (a couple of irq-domain paths can end up grabbing mutexes). Fixes: afa82fab5e13 ("gpio / ACPI: Move event handling registration to gpiolib irqchip helpers") Fixes: 1425052097b5 ("gpio: add IRQ chip helpers in gpiolib") Cc: stable <stable@vger.kernel.org> Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-01-14gpio: clean up gpiochip_add error handlingJohan Hovold1-21/+17
Clean up gpiochip_add error handling. Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-01-14gpio: fix gpio-chip list corruptionJohan Hovold1-7/+10
Fix potential corruption of gpio-chip list due to failure to remove the chip from the list before returning in gpiochip_add error path. The chip could be long gone when the global list is next traversed, something which could lead to a null-pointer dereference. In the best case (chip not deallocated) we are just leaking the gpio range. Fixes: 14e85c0e69d5 ("gpio: remove gpio_descs global array") Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-01-14gpio: fix memory and reference leaks in gpiochip_add error pathJohan Hovold1-4/+7
Memory allocated and references taken by of_gpiochip_add and acpi_gpiochip_add were never released on errors in gpiochip_add (e.g. failure to find free gpio range). Fixes: 391c970c0dd1 ("of/gpio: add default of_xlate function if device has a node pointer") Fixes: 664e3e5ac64c ("gpio / ACPI: register to ACPI events automatically") Cc: stable <stable@vger.kernel.org> Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-12-14Merge tag 'gpio-v3.19-2' of ↵Linus Torvalds1-29/+212
git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio Pull take two of the GPIO updates: "Same stuff as last time, now with a fixup patch for the previous compile error plus I ran a few extra rounds of compile-testing. This is the bulk of GPIO changes for the v3.19 series: - A new API that allows setting more than one GPIO at the time. This is implemented for the new descriptor-based API only and makes it possible to e.g. toggle a clock and data line at the same time, if the hardware can do this with a single register write. Both consumers and drivers need new calls, and the core will fall back to driving individual lines where needed. Implemented for the MPC8xxx driver initially - Patched the mdio-mux-gpio and the serial mctrl driver that drives modems to use the new multiple-setting API to set several signals simultaneously - Get rid of the global GPIO descriptor array, and instead allocate descriptors dynamically for each GPIO on a certain GPIO chip. This moves us closer to getting rid of the limitation of using the global, static GPIO numberspace - New driver and device tree bindings for 74xx ICs - New driver and device tree bindings for the VF610 Vybrid - Support the RCAR r8a7793 and r8a7794 - Guidelines for GPIO device tree bindings trying to get things a bit more strict with the advent of combined device properties - Suspend/resume support for the MVEBU driver - A slew of minor fixes and improvements" * tag 'gpio-v3.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (33 commits) gpio: mcp23s08: fix up compilation error gpio: pl061: document gpio-ranges property for bindings file gpio: pl061: hook request if gpio-ranges avaiable gpio: mcp23s08: Add option to configure IRQ output polarity as active high gpio: fix deferred probe detection for legacy API serial: mctrl_gpio: use gpiod_set_array function mdio-mux-gpio: Use GPIO descriptor interface and new gpiod_set_array function gpio: remove const modifier from gpiod_get_direction() gpio: remove gpio_descs global array gpio: mxs: implement get_direction callback gpio: em: Use dynamic allocation of GPIOs gpio: Check if base is positive before calling gpio_is_valid() gpio: mcp23s08: Add simple IRQ support for SPI devices gpio: mcp23s08: request a shared interrupt gpio: mcp23s08: Do not free unrequested interrupt gpio: rcar: Add r8a7793 and r8a7794 support gpio-mpc8xxx: add mpc8xxx_gpio_set_multiple function gpiolib: allow simultaneous setting of multiple GPIO outputs gpio: mvebu: add suspend/resume support gpio: gpio-davinci: remove duplicate check on resource ..
2014-12-02gpio: fix deferred probe detection for legacy APIAlexandre Courbot1-1/+3
Commit 14e85c0e69d5 ("gpio: remove gpio_descs global array") changed gpio_to_desc()'s behavior to return NULL not only for GPIOs numbers not in the valid range, but also for all GPIOs whose controller has not been probed yet. Although this behavior is more correct (nothing hints that these GPIO numbers will be populated later), this affects gpio_request() and gpio_request_one() which call gpiod_request() with a NULL descriptor, causing it to return -EINVAL instead of the expected -EPROBE_DEFER for a non-probed GPIO. gpiod_request() is only called with a descriptor obtained from gpio_to_desc() from these two functions, so address the issue there. Other ways to obtain GPIOs rely on well-defined mappings and can thus return -EPROBE_DEFER only for relevant GPIOs, and are thus not affected by this issue. Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Alexandre Courbot <acourbot@nvidia.com> Tested-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-11-28gpio: remove const modifier from gpiod_get_direction()Alexandre Courbot1-5/+3
Although gpiod_get_direction() can be considered side-effect free for consumers, its internals involve setting or clearing bits in the affected GPIO descriptor, for which we need to force-cast the const descriptor variable to non-const. This could lead to incorrect behavior if the compiler decides to optimize here, so remove this const attribute. The intent is to make gpiod_get_direction() private anyway, so it does not really matter. Reported-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Alexandre Courbot <acourbot@nvidia.com> Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-11-28gpio: remove gpio_descs global arrayAlexandre Courbot1-16/+31
Replace the ARCH_NR_GPIOS-sized static array of GPIO descriptors by dynamically-allocated arrays for each GPIO chip. This change makes gpio_to_desc() perform in O(n) (where n is the number of GPIO chips registered) instead of O(1), however since n is rarely bigger than 1 or 2 no noticeable performance issue is expected. Besides this provides more incentive for GPIO consumers to move to the gpiod interface. One could use a O(log(n)) structure to link the GPIO chips together, but considering the low limit of n the hypothetical performance benefit is probably not worth the added complexity. This patch uses kcalloc() in gpiochip_add(), which removes the ability to add a chip before kcalloc() can operate. I am not aware of such cases, but if someone bisects up to this patch then I will be proven wrong... Signed-off-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-11-27gpio: Check if base is positive before calling gpio_is_valid()Geert Uytterhoeven1-2/+2
It doesn't make much sense to make some (possible expensive) calls to gpio_is_valid() first, and to ignore the result if the base number is negative. Check for a positive base number first. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-11-27gpiolib: allow simultaneous setting of multiple GPIO outputsRojhalat Ibrahim1-0/+168
Introduce new functions gpiod_set_array & gpiod_set_raw_array to the consumer interface which allow setting multiple outputs with just one function call. Also add an optional set_multiple function to the driver interface. Without an implementation of that function in the chip driver outputs are set sequentially. Implementing the set_multiple function in a chip driver allows for: - Improved performance for certain use cases. The original motivation for this was the task of configuring an FPGA. In that specific case, where 9 GPIO lines have to be set many times, configuration time goes down from 48 s to 20 s when using the new function. - Simultaneous glitch-free setting of multiple pins on any kind of parallel bus attached to GPIOs provided they all reside on the same chip and bank. Limitations: Performance is only improved for normal high-low outputs. Open drain and open source outputs are always set separately from each other. Those kinds of outputs could probably be accelerated in a similar way if we could forgo the error checking when setting GPIO directions. Change log: v6: - rebase on current linux-gpio devel branch v5: - check can_sleep property per chip - remove superfluous checks - supplement documentation v4: - add gpiod_set_array function for setting logical values - change interface of the set_multiple driver function to use unsigned long as type for the bit fields - use generic bitops (which also use unsigned long for bit fields) - do not use ARCH_NR_GPIOS any more v3: - add documentation - change commit message v2: - use descriptor interface - allow arbitrary groups of GPIOs spanning multiple chips Signed-off-by: Rojhalat Ibrahim <imr@rtschenk.de> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Reviewed-by: Mark Brown <broonie@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-11-04gpio: Support for unified device properties interfaceMika Westerberg1-0/+55
Some drivers need to deal with only firmware representation of its GPIOs. An example would be a GPIO button array driver where each button is described as a separate firmware node in device tree. Typically these child nodes do not have physical representation in the Linux device model. In order to help device drivers to handle such firmware child nodes we add dev[m]_get_named_gpiod_from_child() that takes a child firmware node pointer as its second argument (the first one is the parent device itself), finds the GPIO using whatever is the underlying firmware method, and requests the GPIO properly. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Acked-by: Alexandre Courbot <acourbot@nvidia.com> Acked-by: Grant Likely <grant.likely@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-11-04gpio / ACPI: Add support for _DSD device propertiesMika Westerberg1-4/+26
With release of ACPI 5.1 and _DSD method we can finally name GPIOs (and other things as well) returned by _CRS. Previously we were only able to use integer index to find the corresponding GPIO, which is pretty error prone if the order changes. With _DSD we can now query GPIOs using name instead of an integer index, like the below example shows: // Bluetooth device with reset and shutdown GPIOs Device (BTH) { Name (_HID, ...) Name (_CRS, ResourceTemplate () { GpioIo (Exclusive, PullUp, 0, 0, IoRestrictionInputOnly, "\\_SB.GPO0", 0, ResourceConsumer) {15} GpioIo (Exclusive, PullUp, 0, 0, IoRestrictionInputOnly, "\\_SB.GPO0", 0, ResourceConsumer) {27, 31} }) Name (_DSD, Package () { ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"), Package () { Package () {"reset-gpio", Package() {^BTH, 1, 1, 0 }}, Package () {"shutdown-gpio", Package() {^BTH, 0, 0, 0 }}, } }) } The format of the supported GPIO property is: Package () { "name", Package () { ref, index, pin, active_low }} ref - The device that has _CRS containing GpioIo()/GpioInt() resources, typically this is the device itself (BTH in our case). index - Index of the GpioIo()/GpioInt() resource in _CRS starting from zero. pin - Pin in the GpioIo()/GpioInt() resource. Typically this is zero. active_low - If 1 the GPIO is marked as active_low. Since ACPI GpioIo() resource does not have field saying whether it is active low or high, the "active_low" argument can be used here. Setting it to 1 marks the GPIO as active low. In our Bluetooth example the "reset-gpio" refers to the second GpioIo() resource, second pin in that resource with the GPIO number of 31. This patch implements necessary support to gpiolib for extracting GPIOs using _DSD device properties. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Grant Likely <grant.likely@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-10-28gpio: rename gpio_lock_as_irq to gpiochip_lock_as_irqAlexandre Courbot1-8/+8
This function actually operates on a gpio_chip, so its prefix should reflect that fact for consistency with other functions defined in gpio/driver.h. Signed-off-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2014-10-09Merge tag 'gpio-v3.18-1' of ↵Linus Torvalds1-36/+54
git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio Pull GPIO changes from Linus Walleij: "This is the bulk of GPIO changes for the v3.18 development cycle: - Increase the default ARCH_NR_GPIO from 256 to 512. This was done to avoid having a custom <asm/gpio.h> header for the x86 architecture - GPIO is custom and complicated enough as it is already! We want to move to a radix to store the descriptors going forward, and finally get rid of this fixed array size altogether. - Endgame patching of the gpio_remove() semantics initiated by Abdoulaye Berthe. It is not accepted by the system that the removal of a GPIO chip fails during eg reboot or shutdown, and therefore the return value has now painfully been refactored away. For special cases like GPIO expanders on a hot-pluggable bus like USB, we may later add some gpiochip_try_remove() call, but for the cases we have now, return values are moot. - Some incremental refactoring of the gpiolib core and ACPI GPIO library for more descriptor usage. - Refactor the chained IRQ handler set-up method to handle also threaded, nested interrupts and set up the parent IRQ correctly. Switch STMPE and TC3589x drivers to use this registration method. - Add a .irq_not_threaded flag to the struct gpio_chip, so that also GPIO expanders that block but are still not using threaded IRQ handlers. - New drivers for the ARM64 X-Gene SoC GPIO controller. - The syscon GPIO driver has been improved to handle the "DSP GPIO" found on the TI Keystone 2 SoC:s. - ADNP driver switched to use gpiolib irqchip helpers. - Refactor the DWAPB driver to support being instantiated from and MFD cell (platform device). - Incremental feature improvement in the Zynq, MCP23S08, DWAPB, OMAP, Xilinx and Crystalcove drivers. - Various minor fixes" * tag 'gpio-v3.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (52 commits) gpio: pch: Build context save/restore only for PM pinctrl: abx500: get rid of unused variable gpio: ks8695: fix 'else should follow close brace '}'' gpio: stmpe: add verbose debug code gpio: stmpe: fix up interrupt enable logic gpio: staticize xway_stp_init() gpio: handle also nested irqchips in the chained handler set-up gpio: set parent irq on chained handlers gpiolib: irqchip: use irq_find_mapping while removing irqchip gpio: crystalcove: support virtual GPIO pinctrl: bcm281xx: make Kconfig dependency more strict gpio: kona: enable only on BCM_MOBILE or for compile testing gpio, bcm-kona, LLVMLinux: Remove use of __initconst gpio: Fix ngpio in gpio-xilinx driver gpio: dwapb: fix pointer to integer cast gpio: xgene: Remove unneeded #ifdef CONFIG_OF guard gpio: xgene: Remove unneeded forward declation for struct xgene_gpio gpio: xgene: Fix missing spin_lock_init() gpio: ks8695: fix switch case indentation gpiolib: add irq_not_threaded flag to gpio_chip ...
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