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path: root/drivers/base/regmap/regmap-irq.c
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* regmap: irq: Allow using zero value for ack_baseAlexander Shiyan2013-12-161-3/+3
| | | | | | | | | | | In some cases, clear interrupt register may be at address 0. This patch allows to use such configurations by adding additional configuration bit to indicate this. [With doc fix from Levente Kurusa <levex@linux.com> -- broonie] Signed-off-by: Alexander Shiyan <shc_work@mail.ru> Signed-off-by: Mark Brown <broonie@linaro.org>
* regmap: irq: clear status when disable irqYi Zhang2013-10-221-0/+16
| | | | | | | | | | | | | | | | clear the status bit if the mask register doesn't prevent the chip level irq from being asserted OR in the following sequence, there will be irq storm happens: 1) interrupt is triggered; 2) another thread disables it(the mask bit is set); 3) _Then_ the interrupt thread is not ACKed(the status bit is not cleared), and it's ignored; 4) if the irq is still asserted because of the uncleared status bit, the irq storm happens; Signed-off-by: Yi Zhang <yizhang@marvell.com> Signed-off-by: Mark Brown <broonie@linaro.org>
* regmap: irq: Allow to acknowledge masked interrupts during initializationPhilipp Zabel2013-07-231-0/+25
| | | | | | | | | | In case the hardware interrupt mask register does not prevent the chip level irq from being asserted by the corresponding interrupt status bit, already set interrupt bits should to be cleared once after masking them during initialization. Add a flag to let drivers enable this behavior. Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Signed-off-by: Mark Brown <broonie@linaro.org>
* regmap: irq: Clarify error message when we fail to request primary IRQMark Brown2013-03-191-1/+2
| | | | | | | Display the name for the chip rather than just the primary IRQ so it is clearer what exactly has failed. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regmap: irq: call pm_runtime_put in pm_runtime_get_sync failed caseLi Fei2013-03-011-0/+1
| | | | | | | | | | | Even in failed case of pm_runtime_get_sync, the usage_count is incremented. In order to keep the usage_count with correct value and runtime power management to behave correctly, call pm_runtime_put(_sync) in such case. Signed-off-by Liu Chuansheng <chuansheng.liu@intel.com> Signed-off-by: Li Fei <fei.li@intel.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regmap: irq: Support wake IRQ mask inversionMark Brown2013-01-041-4/+17
| | | | | | | Support devices which have an enable rather than mask register for wake sources. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regmap: irq: Fix sync of wake statuses to hardwareMark Brown2013-01-041-0/+11
| | | | | | | This wasn't implemented but happened to work on test systems due to lack of wake mask inversion support. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regmap: irq: Use a bulk read for interrupt status where possibleMark Brown2013-01-041-7/+60
| | | | | | | | | If the interrupt status registers are a single block of registers and the chip supports bulk reads then do a single bulk read rather than pay the extra I/O cost. This restores the original behaviour which was lost when support for register striding was added. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regmap: irq: Factor register read out of the IRQ parsing loopMark Brown2013-01-031-7/+9
| | | | | | In preparation for adding back support for block reads. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regmap: irq: enable wake support by defaultLaxman Dewangan2012-12-241-12/+6
| | | | | | | | | | | | | | | | regmap-irq framework is used vastly by mfd drivers and some of devices like TPS65910, TPS80036 do not support the wake base register to enable wake. Currently wake in regmap-irq only supported if client driver passes the wake base register. As the regmap-irq is mostly used by mfd devices and it is require to have wake support from these devices in most of use cases, enabling wake support by default in regmap-irq. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regmap: irq: Allow users to retrieve the irq_domainMark Brown2012-10-151-0/+19
| | | | | | | This is useful for integration with other subsystems, especially MFD, and provides an alternative API for users that request their own IRQs. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regmap: no need primary handler for nested irqYunfan Zhang2012-09-091-1/+1
| | | | | | | | The primary handler will NOT be called if the interrupt nests into another interrupt thread. Remove it to avoid confusing. Signed-off-by: Yunfan Zhang <yfzhang@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regmap: irq: Add mask invert flag for enable registerXiaofan Tian2012-08-301-2/+10
| | | | | | | | | | | | | | | | | Currently, regmap will write 1 to mask_base to mask an interrupt and write 0 to unmask it. But some chips do not have an interrupt mask register, and only have interrupt enable register. Then we should write 0 to disable interrupt and 1 to enable. So add an mask_invert flag to handle this. If it is not set, behavior is same as previous. If set it to 1, the mask value will be inverted before written to mask_base Signed-off-by: Xiaofan Tian <tianxf@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regmap: irq: Enable devices for runtime PM while handling interruptsMark Brown2012-08-071-0/+25
| | | | | | | | Some devices need to have a runtime PM reference while handling interrupts to ensure that the register I/O is available. Support this with a flag in the chip. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regmap: irq: initialize all irqs to wake disabledStephen Warren2012-08-041-0/+16
| | | | | | | | | | | | | | The kerneldoc for irq_set_irq_wake() says: Enable/disable power management wakeup mode, which is disabled by default. regmap_irq_set_wake() clears bits to enable wake for an interrupt, and sets bits to disable wake. Hence, we should set all bits in wake_buf initially, to mirror the expected disabled state. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regmap: set MASK_ON_SUSPEND/SKIP_SET_WAKE if no wake_baseStephen Warren2012-08-041-0/+5
| | | | | | | | | | | | | | | | | | | | | If a regmap-irq chip has no wake base: * There's no point calling .irq_set_wake, hence IRQCHIP_SKIP_SET_WAKE. * If some IRQs in the chip are enabled for wake and some aren't, we should mask those interrupts that are not wake enabled, so that if they occur during suspend, the system is not awoken. Hence, IRQCHIP_MASK_ON_SUSPEND. Note that IRQCHIP_MASK_ON_SUSPEND is handled by check_wakeup_irqs(), which always iterates over every single interrupt in the system, irrespective of whether an interrupt is a child of a controller whose output interrupt has no wake-enabled inputs and hence is presumably masked itself. Hence this change might cause interrupt unnecessary masking operations and associated register I/O. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regmap: name irq_chip based on regmap_irq_chip's nameStephen Warren2012-08-041-1/+1
| | | | | | | | This is intended to give each irq_chip a useful name, rather than hard- coding them all as "regmap". Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regmap: store irq_chip inside regmap_irq_chip_dataStephen Warren2012-08-041-2/+4
| | | | | | | | This will allow later patches to adjust portions of the irq_chip individually for each regmap_irq_chip that is created. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regmap: irq: Only update mask bits when doing initial maskMark Brown2012-08-041-1/+2
| | | | | | | | Don't write the full register, it's possible there's bits other than the masks in the same register which we shouldn't be changing. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Tested-by: Stephen Warren <swarren@wwwdotorg.org>
* regmap: fix some error messages to take account of irq_reg_strideStephen Warren2012-08-041-14/+15
| | | | | | | | | | A number of places in the code were printing error messages that included the address of a register, but were not calculating the register address in the same way as the access to the register. Use a temporary to solve this. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
*-. Merge branches 'regmap-core', 'regmap-irq' and 'regmap-page' into regmap-nextMark Brown2012-07-221-0/+51
|\ \ | | | | | | | | | | | | | | | Conflicts (trivial context stuff): drivers/base/regmap/regmap.c include/linux/regmap.h
| * | regmap: Implement support for wake IRQsMark Brown2012-06-051-0/+47
| | | | | | | | | | | | | | | | | | | | | | | | Allow chips to provide a bank of registers for controlling the wake state in a similar fashion to the masks and propagate the wake count to the parent interrupt controller. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| * | regmap: Don't try to map non-existant IRQsMark Brown2012-06-051-0/+4
| |/ | | | | | | | | | | | | | | If the driver supplied an empty entry in the array of IRQs then return an error rather than trying to do the mapping. This is intended for use with handling chip variants and similar situations. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* | regmap: Constify regmap_irq_chipMark Brown2012-06-031-3/+3
|/ | | | | | We should never be modifying it and it lets drivers declare it const. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regmap: Fix typo in IRQ register stridingMark Brown2012-05-171-1/+1
| | | | Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regmap: add support for non contiguous status to regmap-irqGraeme Gregory2012-05-141-33/+21
| | | | | | | | | | In some chips the IRQ status registers are not contiguous in the register map but spaced at even spaces. This is an easy case to handle with minor changes. It is assume for this purpose that the stride for status is equal to the stride for mask/ack registers as well. Signed-off-by: Graeme Gregory <gg@slimlogic.co.uk> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regmap: Convert regmap_irq to use irq_domainMark Brown2012-05-131-27/+70
| | | | | | | | | | | | | | | | This gets us up to date with the recommended current kernel infrastructure and should transparently give us device tree interrupt bindings for any devices using the framework. If an explicit IRQ mapping is passed in then a legacy interrupt range is created, otherwise a simple linear mapping is used. Previously a mapping was mandatory so existing drivers should not be affected. A function regmap_irq_get_virq() is provided to allow drivers to map individual IRQs which should be used in preference to the existing regmap_irq_chip_get_base() which is only valid if a legacy IRQ range is provided. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
*-. Merge branches 'regmap-core', 'regmap-stride', 'regmap-mmio' and ↵Mark Brown2012-05-131-11/+28
|\ \ | | | | | | | | | 'regmap-irq' into regmap-next
| | * regmap: Pass back the allocated regmap IRQ controller dataMark Brown2012-05-131-0/+2
| |/ |/| | | | | | | | | It's needed for freeing and for obtaining the IRQ base later on. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| * regmap: fix compile errors in regmap-irq.c due to stride changesStephen Warren2012-04-111-1/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit f01ee60fffa4 ("regmap: implement register striding") caused the compile errors below. Fix them. drivers/base/regmap/regmap-irq.c: In function 'regmap_irq_sync_unlock': drivers/base/regmap/regmap-irq.c:62:12: error: 'map' undeclared (first use in this function) drivers/base/regmap/regmap-irq.c:62:12: note: each undeclared identifier is reported only once for each function it appears in drivers/base/regmap/regmap-irq.c: In function 'regmap_irq_enable': drivers/base/regmap/regmap-irq.c:77:37: error: 'map' undeclared (first use in this function) drivers/base/regmap/regmap-irq.c: In function 'regmap_irq_disable': drivers/base/regmap/regmap-irq.c:85:37: error: 'map' undeclared (first use in this function) Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| * regmap: implement register stridingStephen Warren2012-04-101-11/+23
|/ | | | | | | | | | | | | | | | | | | regmap_config.reg_stride is introduced. All extant register addresses are a multiple of this value. Users of serial-oriented regmap busses will typically set this to 1. Users of the MMIO regmap bus will typically set this based on the value size of their registers, in bytes, so 4 for a 32-bit register. Throughout the regmap code, actual register addresses are used. Wherever the register address is used to index some array of values, the address is divided by the stride to determine the index, or vice-versa. Error- checking is added to all entry-points for register address data to ensure that register addresses actually satisfy the specified stride. The MMIO bus ensures that the specified stride is large enough for the register size. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* device.h: cleanup users outside of linux/include (C files)Paul Gortmaker2012-03-111-0/+1
| | | | | | | | | | | | | | For files that are actively using linux/device.h, make sure that they call it out. This will allow us to clean up some of the implicit uses of linux/device.h within include/* without introducing build regressions. Yes, this was created by "cheating" -- i.e. the headers were cleaned up, and then the fallout was found and fixed, and then the two commits were reordered. This ensures we don't introduce build regressions into the git history. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
* regmap: Add irq_base accessor to regmap_irqMark Brown2011-12-051-0/+13
| | | | | | | Allows devices to discover their own interrupt without having to remember it themselves. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regmap: Report if we actually handled an interrupt in regmap-irqMark Brown2011-11-281-1/+6
| | | | | | | | | While the IRQ core doesn't currently support shared threaded interrupts that's no reason for drivers not to do their bit and report IRQ_NONE when they don't get an interrupt. This allows the core spurious/wedget interrupt detection support to do its thing. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regmap: Add a reusable irq_chip for regmap based interrupt controllersMark Brown2011-11-081-0/+284
There seem to be lots of regmap-using devices with very similar interrupt controllers with a small bank of interrupt registers and mask registers with an interrupt per bit. This won't cover everything but it's a good start. Each chip supplies a base for the status registers, a base for the mask registers, an optional base for writing acknowledgements (which may be the same as the status registers) and an array of bits within each of these register banks which indicate the interrupt. There is an assumption that the bit for each interrupt will be the same in each of the register bank. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
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