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path: root/drivers/gpio/gpio-dwapb.c
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* genirq: Remove irq argument from irq flow handlersThomas Gleixner2015-09-161-1/+1
| | | | | | | | | | | | | | Most interrupt flow handlers do not use the irq argument. Those few which use it can retrieve the irq number from the irq descriptor. Remove the argument. Search and replace was done with coccinelle and some extra helper scripts around it. Thanks to Julia for her help! Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Julia Lawall <Julia.Lawall@lip6.fr> Cc: Jiang Liu <jiang.liu@linux.intel.com>
* gpio: Use irq_desc_get_xxx() to avoid redundant lookup of irq_descJiang Liu2015-07-141-1/+1
| | | | | | | | | | | | | Use irq_desc_get_xxx() to avoid redundant lookup of irq_desc while we already have a pointer to corresponding irq_desc. Preparatory patch for the removal of the 'irq' argument from irq flow handlers. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Cc: Alexandre Courbot <gnurou@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* gpio/dwapb: Fix race in installing chained IRQ handlerThomas Gleixner2015-06-251-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix a race where a pending interrupt could be received and the handler called before the handler's data has been setup, by converting to irq_set_chained_handler_and_data(). Search and conversion was done with coccinelle: @@ expression E1, E2, E3; @@ ( -if (irq_set_chained_handler(E1, E3) != 0) - BUG(); | -irq_set_chained_handler(E1, E3); ) -irq_set_handler_data(E1, E2); +irq_set_chained_handler_and_data(E1, E3, E2); @@ expression E1, E2, E3; @@ ( -if (irq_set_chained_handler(E1, E3) != 0) - BUG(); ... | -irq_set_chained_handler(E1, E3); ... ) -irq_set_handler_data(E1, E2); +irq_set_chained_handler_and_data(E1, E3, E2); 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
* gpio: dwapb: Convert to use resource managed APIsAxel Lin2015-01-151-39/+14
| | | | | | | Use resource managed APIs to simplify the code a bit. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* Merge tag 'driver-core-3.19-rc1' of ↵Linus Torvalds2014-12-141-1/+0
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core Pull driver core update from Greg KH: "Here's the set of driver core patches for 3.19-rc1. They are dominated by the removal of the .owner field in platform drivers. They touch a lot of files, but they are "simple" changes, just removing a line in a structure. Other than that, a few minor driver core and debugfs changes. There are some ath9k patches coming in through this tree that have been acked by the wireless maintainers as they relied on the debugfs changes. Everything has been in linux-next for a while" * tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (324 commits) Revert "ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries" fs: debugfs: add forward declaration for struct device type firmware class: Deletion of an unnecessary check before the function call "vunmap" firmware loader: fix hung task warning dump devcoredump: provide a one-way disable function device: Add dev_<level>_once variants ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries ath: use seq_file api for ath9k debugfs files debugfs: add helper function to create device related seq_file drivers/base: cacheinfo: remove noisy error boot message Revert "core: platform: add warning if driver has no owner" drivers: base: support cpu cache information interface to userspace via sysfs drivers: base: add cpu_device_create to support per-cpu devices topology: replace custom attribute macros with standard DEVICE_ATTR* cpumask: factor out show_cpumap into separate helper function driver core: Fix unbalanced device reference in drivers_probe driver core: fix race with userland in device_add() sysfs/kernfs: make read requests on pre-alloc files use the buffer. sysfs/kernfs: allow attributes to request write buffer be pre-allocated. fs: sysfs: return EGBIG on write if offset is larger than file size ...
| * gpio: drop owner assignment from platform_driversWolfram Sang2014-10-201-1/+0
| | | | | | | | | | | | | | A platform_driver does not need to set an owner, it will be populated by the driver core. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
* | gpio: rename gpio_lock_as_irq to gpiochip_lock_as_irqAlexandre Courbot2014-10-281-2/+2
|/ | | | | | | | | 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>
* gpio: dwapb: fix pointer to integer castLinus Walleij2014-09-241-2/+2
| | | | | | | | The statements BUG_ON(ctx == 0) was implicitly casting a pointer to an integer for comparison. Do this with a bool test instead to get away from sparse warnings. Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* GPIO: gpio-dwapb: Suspend & Resume PM enablingWeike Chen2014-09-231-0/+115
| | | | | | | | | | This patch enables suspend and resume mode for the power management, and it is based on Josef Ahmad's previous work. Reviewed-by: Hock Leong Kweh <hock.leong.kweh@intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Weike Chen <alvin.chen@intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* GPIO: gpio-dwapb: Support DebounceWeike Chen2014-09-231-2/+34
| | | | | | | | | | This patch enables 'debounce' for the designware GPIO, and it is based on Josef Ahmad's previous work. Reviewed-by: Hock Leong Kweh <hock.leong.kweh@intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Weike Chen <alvin.chen@intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* GPIO: gpio-dwapb: Change readl&writel to dwapb_read&dwapb_writeWeike Chen2014-09-231-10/+27
| | | | | | | | This patch replaces 'readl&writel' with 'dwapb_read&dwapb_write'. Reviewed-by: Shevchenko, Andriy <andriy.shevchenko@intel.com> Signed-off-by: Weike Chen <alvin.chen@intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* GPIO: gpio-dwapb: Enable platform driver binding to MFD driverWeike Chen2014-09-231-57/+167
| | | | | | | | | | | | The Synopsys DesignWare APB GPIO driver only supports open firmware devices. But, like Intel Quark X1000 SOC, which has a single PCI function exporting a GPIO and an I2C controller, it is a Multifunction device. This patch is to enable the current Synopsys DesignWare APB GPIO driver to support the Multifunction device which exports the designware GPIO controller. Reviewed-by: Hock Leong Kweh <hock.leong.kweh@intel.com> Signed-off-by: Weike Chen <alvin.chen@intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: remove all usage of gpio_remove retval in driver/gpioabdoulaye berthe2014-07-221-1/+1
| | | | | Signed-off-by: abdoulaye berthe <berthe.ab@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: dwapb: use a second irq chipSebastian Andrzej Siewior2014-05-271-13/+22
| | | | | | | | | | | | Right new have one irq chip running always in level mode. It would nicer to have two irq chips where one is handling level type interrupts and the other one is doing edge interrupts. So we can have at runtime two users where one is using edge and the other level. Acked-by: Alan Tull <delicious.quinoa@gmail.com> Acked-by: Jamie Iles <jamie@jamieiles.com> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: dwapb: drop irq_setup_generic_chip()Sebastian Andrzej Siewior2014-04-281-3/+0
| | | | | | | | | | | | The driver calls irq_alloc_domain_generic_chips() which creates a gc and adds it to gc_list. The driver later then calls irq_setup_generic_chip() which also initializes the gc and adds it to the gc_list() and this corrupts the list. Enable LIST_DEBUG and you see the kernel complain. This isn't required, irq_alloc_domain_generic_chips() did the init. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Tested-by: Alan Tull <delicious.quinoa@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: switch drivers to use new callbackLinus Walleij2014-03-181-7/+7
| | | | | | | | | | | | This switches all GPIO and pin control drivers with irqchips that were using .startup() and .shutdown() callbacks to lock GPIO lines for IRQ usage over to using the .request_resources() and .release_resources() callbacks just introduced into the irqchip vtable. Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Jean-Jacques Hiblot <jjhiblot@traphandler.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: add a driver for the Synopsys DesignWare APB GPIO blockJamie Iles2014-03-051-0/+438
The Synopsys DesignWare block is used in some ARM devices (picoxcell) and can be configured to provide multiple banks of GPIO pins. v12: - Add irq_startup/shutdown - do irq_create_mapping() in probe, irq_find_mapping() in to_irq() - Adjust mappings to show support for 1 gpio per port. - gpio-cells = <1> v11: - Use NULL when checking existence of 'interrupts' property - Bindings descriptions cleanup v10: - in documentation nr-gpio -> nr-gpios v9: - cleanup in dt bindings doc - use of_get_child_count() v8: - remove socfpga.dtsi changes - minor cleanup in devicetree documentation v7: - use irq_generic_chip - support one irq per gpio line or one irq for many - s/bank/port/ and other cleanup v6: - (atull) squash the set of patches - use linear irq domain - build fixes. Original driver was reviewed on v3.2. - Fix setting irq edge type for 'rising' and 'both'. - Support as a loadable module. - Use bgpio_chip's spinlock during register access. - Clean up register names to match spec - s/bank/port/ because register names use the word 'port' - s/nr-gpio/nr-gpios/ - don't get/put the of_node - remove signoffs/acked-by's because of changes - other cleanup v5: - handle sparse bank population correctly v3: - depend on rather than select IRQ_DOMAIN - split IRQ support into a separate patch v2: - use Rob Herring's irqdomain in generic irq chip patches - use reg property to indicate bank index - support irqs on both edges based on LinusW's u300 driver Signed-off-by: Jamie Iles <jamie@jamieiles.com> Signed-off-by: Alan Tull <atull@altera.com> Reviewed-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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