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path: root/drivers/mfd/wm8994-irq.c
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2021-08-05mfd: Don't use irq_create_mapping() to resolve a mappingMarc Zyngier1-1/+1
Although irq_create_mapping() is able to deal with duplicate mappings, it really isn't supposed to be a substitute for irq_find_mapping(), and can result in allocations that take place in atomic context if the mapping didn't exist. Fix the handful of MFD drivers that use irq_create_mapping() in interrupt context by using irq_find_mapping() instead. Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Lee Jones <lee.jones@linaro.org> Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com> Cc: Alexandre Torgue <alexandre.torgue@foss.st.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2019-05-30treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152Thomas Gleixner1-6/+1
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-08-11mfd: wm8994: Fix NULL pointer exception on missing pdataInha Song1-1/+1
If we use the dev_get_platdata, pdata can be NULL in DT environments. Actually, NULL pointer exception is occurs with error messages like this: [ 1.226583] Unable to handle kernel NULL pointer dereference at virtual address 00000044 [ 1.467910] [<c02f1e38>] (wm8994_irq_init) from [<c02f1bd4>] (wm8994_i2c_probe+0x684/0x858) [ 1.476241] [<c02f1bd4>] (wm8994_i2c_probe) from [<c0371c78>] (i2c_device_probe+0x11c/0x17c) In wm8994-core, we already checked whether platform data is NULL and set the wm8994->pdata to platform data if platform data is not NULL. So, we can use wm8994->pdata instead of platform data. Signed-off-by: Inha Song <ideal.song@samsung.com> Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2015-08-11mfd: Kill off set_irq_flags usageRob Herring1-7/+0
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. There appears to be a great deal of blind copy and paste of this code. Signed-off-by: Rob Herring <robh@kernel.org> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2015-06-22mfd: Constify regmap and irq configuration dataKrzysztof Kozlowski1-3/+3
Constify in various drivers configuration data which is not modified: - regmap_irq_chip, - individual regmap_irq's in array, - regmap_config, - irq_domain_ops, Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k@gmail.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-09-26mfd: wm8994: Export symbols ready for built-in => modular buildLee Jones1-0/+2
We'd like to be able to build the WM8994 family as modules, but the build will fail if the external symbols aren't exported first. Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2013-07-31mfd: Use dev_get_platdata()Jingoo Han1-1/+1
Use the wrapper function for retrieving the platform data instead of accessing dev->platform_data directly. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2013-06-11mfd: wm8994: Emulate level triggered interrupts if requiredMark Brown1-4/+96
The interrupt controller on the wm8994 series of devices requires a level triggered parent. If one is not available but a GPIO is available for the interrupt then emulate. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2012-08-07mfd: wm8994: Flag the interrupt block as requiring runtime PM be enabledMark Brown1-0/+1
It's only required in a few circumstances but better to be safe. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-07-09mfd: Support for user defined wm8994 irq flagsMark Brown1-1/+9
Signed-off-by: Chris Rattray <crattray@opensource.wolfsonmicro.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2012-05-15mfd: wm8994: Update to fully use irq_domainMark Brown1-6/+0
Take advantage of the new regmap irq_domain support to dynamically allocate interrupts, using regmap_irq_get_virq() rather than irq_base to look up the interrupts. This means that most users should not need to specify an irq_base at all. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Samuel Ortiz <sameo@linux.intel.com>
2011-12-12mfd: Convert wm8994 to use generic regmap irq_chipMark Brown1-163/+33
Factor out the irq_chip implementation, substantially reducing the code size for the driver. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Samuel Ortiz <sameo@linux.intel.com>
2011-12-12mfd: Remove some unused functions in wm8894-irqMark Brown1-10/+0
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Samuel Oritz <sameo@linux.intel.com>
2011-08-01mfd: Acknowledge WM8994 IRQs before reportingMark Brown1-6/+6
This ensures we never have a window where we've handled an interrupt but not told the hardware about it. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-03-27mfd: Cleanup irq namespaceThomas Gleixner1-4/+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>
2011-03-23mfd: Push byte swaps out of wm8994 bulk read pathMark Brown1-2/+4
For consistency with the write path push byte swaps of the WM8994 register data out of the bulk read data path into the per-register APIs. The only user of the bulk register read is the interrupt code which is updated to do the swaps itself part of this patch. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-03-23mfd: Convert WM8994/58 interrupt masking to enable/disable operationsMark Brown1-4/+4
The WM8994/58 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>
2011-01-14mfd: Convert Wolfson MFD drivers to use irq_data accessor functionMark Brown1-4/+4
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>
2011-01-14mfd: Convert WM8994 to new irq_ interrupt methodsMark Brown1-15/+17
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>
2010-04-05mfd: Add WM8994 interrupt controller supportMark Brown1-0/+310
The WM8994 has an interrupt controller which supports interrupts for both CODEC and GPIO portions of the chip. Support this using genirq, while allowing for systems that do not have an interrupt hooked up. Wrapper functions are provided for the IRQ request and free to simplify the code in consumer drivers when handling cases where IRQs are not set up. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Samuel Ortiz <sameo@linux.intel.com>
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