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path: root/drivers/mfd/wm831x-irq.c
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* mfd: Simulate active high IRQs with wm831xMark Brown2011-10-241-1/+21
| | | | | | | | | | | In order to ease system integration provide a simulation of active high IRQs on the GPIOs by polling the GPIO status when an IRQ is generated. This isn't ideal on several fronts and will miss initially active IRQs in the current implementation but it should work well for most cases. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
* mfd: Remove spurious newlines from wm831x-irq.cMark Brown2011-10-241-2/+0
| | | | | | | More annoying than usual as they're in the middle of a function. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
* mfd: Acknowlege all WM831x IRQs before we handle themMark Brown2011-07-311-17/+13
| | | | | | | | | | Ensure that we never have a window where we've handled an interrupt (and therefore need to be notified of new events) but haven't yet told the interrupt controller that this is the case (so any new events will be discarded). Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
* mfd: Fix off by one in WM831x IRQ codeDimitris Papastamos2011-07-311-0/+5
| | | | | | | | | The GPIO IRQs aren't the first IRQs defined, we need to subtract the base for the GPIOs as well to use them for array indexes. Signed-off-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
* mfd: Support dynamic allocation of IRQ range for wm831xMark Brown2011-07-311-5/+13
| | | | | | | | | Use irq_allocate_desc() to get the IRQ range, which turns into a noop on non-sparse systems. Since all existing users are non-sparse there should be no compatibility issues. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
* mfd: Fix bus lock interaction for WM831x IRQ set_type() operationMark Brown2011-07-311-6/+18
| | | | | | | | | | | | The WM831x IRQ set_type() operation is doing a direct register write when called but since set_type() is called with the bus lock held this isn't legal and could cause deadlocks in the IRQ core. Fix this by posting the updates into an array and syncing in the bus_sync_unlock() callback. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
* mfd: Continue with IRQ setup even if we don't have PMIC main IRQMark Brown2011-05-261-13/+14
| | | | | | | | | | | The fact that we can't actually raise any interrupts doesn't stop us setting up the IRQs we're exporting. While this isn't actually going to do anything it allows us to proceed further through device setup during board bringup and avoids issues with the MFD core not letting us suppress the configuration of IRQ resources. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
* mfd: Cleanup irq namespaceThomas Gleixner2011-03-271-4/+4
| | | | | | | | Converted with coccinelle. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
* mfd: Convert WM831x interrupt masking to enable/disable operationsMark Brown2011-03-231-4/+8
| | | | | | | | | | | The WM831x interrupt masking support is a much better match for the genirq enable and disable operations than for the mask and unmask operations. The latter are intended to used during interrupt handling for temporary changes which isn't really practical on a slow bus. Convert the operations over to match this. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
* mfd: Remove bitrotted genirq comment from wm831x IRQ codeMark Brown2011-03-231-9/+0
| | | | | Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
* mfd: Add fast path for WM831x touchscreen interruptsMark Brown2011-03-231-0/+12
| | | | | | | | | | | | | The WM831x interrupt controller provides reporting of the touchscreen related interrupts in the primary interrupt status register as a performance optimisation - use this to avoid reading the secondary status registers for those interrupts. For code simplicity and to avoid iterating over all interrupts we open code for the two affected interrupt sources. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
* mfd: Support configuration of WM831x /IRQ output in CMOS modeMark Brown2011-03-231-0/+8
| | | | | | | | | | Provide platform data allowing the system to set the /IRQ pin into CMOS mode rather than the default open drain. The default value of this platform data reflects the default hardware configuration so there should be no change to existing users. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
* mfd: Leave acknowledgement of WM831x touchscreen IRQs to the driverMark Brown2011-03-231-0/+3
| | | | | | | | | The WM831x touchscreen interrupts need acknowledgement even when using direct signals to the CPU (which don't go through the core) so leave the acknowledgement up to the touchscreen driver for simplicity. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
* mfd: Flag WM831x /IRQ as a wake sourceMark Brown2011-01-141-0/+11
| | | | | | | | | The WM831x can generate wake events, some unconditionally, so flag the primary IRQ as a wake source in order to help the CPU treat the /IRQ signal appropriately. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
* mfd: Convert Wolfson MFD drivers to use irq_data accessor functionMark Brown2011-01-141-5/+5
| | | | | | | | Actually makes the code larger rathe rthan smaller but does provide some isolation against core API changes. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
* mfd: Convert WM831x to new irq_ interrupt methodsMark Brown2011-01-141-20/+22
| | | | | | | | | Kernel 2.6.37 adds new interrupt methods which take a struct irq_data rather than an irq number. Convert over to these as they will become mandatory in future. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
* mfd: Ignore non-GPIO IRQs when setting wm831x IRQ typesMark Brown2010-09-291-2/+7
| | | | | | | | | | The driver was originally tested with an additional patch which made this unneeded but that patch had issuges and got lost on the way to mainline, causing problems when the errors are reported. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com> Cc: stable@kernel.org
* mfd: Initialise WM831x IRQ masks on chip even if interrupts not in useMark Brown2010-05-281-8/+8
| | | | | | | | | | | Ensure that the hardware has interrupts masked if we are not using the interrupt controller on the WM831x by initialising the masks before we check for the setup data required for the IRQ line. This avoids signalling an unused IRQ line and improves the robustness of checks that the IRQ is in use. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
* mfd: Remove unused wm831x IRQ handler dataMark Brown2010-05-281-2/+0
| | | | | | | | This was used by the old, pre-genirq IRQ implementation but is no longer required. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
* ASoC: Use more idiomatic driver name for WM8731Mark Brown2010-05-101-0/+30
| | | | | | | Make dev_() prints much prettier. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
* mfd: Move WM831x to generic IRQMark Brown2009-12-131-122/+87
| | | | | | | | | | | Replace the wm831x-local IRQ infrastructure with genirq, allowing access to the diagnostic infrastructure of genirq and allowing us to implement interrupt support for the GPIOs. The switchover is done within the wm831x specific IRQ API, further patches will convert the individual drivers to use genirq directly. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
* mfd: Always initialise WM831x IRQ mutexMark Brown2009-10-271-1/+2
| | | | | | | This avoids crashes when running without interrupt support. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
* mfd: Add WM831x interrupt supportMark Brown2009-09-171-0/+559
The WM831x includes an interrupt controller managing interrupts for the various functions on the chip. This patch adds support for the core interrupt block on the device. Ideally this would be supported by genirq, particularly for the GPIOs, but currently genirq is unable to cope with controllers on interrupt driven buses so we cut'n'paste the generic interface. Once genirq is able to cope chips like this it should be a case of filing the prefixes off the code and redoing wm831x-irq.c to move over. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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