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*-. Merge remote-tracking branches 'regmap/topic/cache' and 'regmap/topic/irq' ↵Mark Brown2012-09-222-26/+79
|\ \ | | | | | | | | | into regmap-next
| | * 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>
| * regmap: Don't lock in regmap_reinit_cache()Dimitris Papastamos2012-08-041-9/+4
|/ | | | | | | | | | | | When bus->fast_io is set, the locking here is done with spinlocks. This is currently true for the regmap-mmio bus implementation. While holding a spinlock we can't go to sleep, various operations like removing the debugfs entries or re-initializing the cache will sleep, therefore, shift the locking up to the user. Signed-off-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
*-. Merge branches 'regmap-core', 'regmap-irq' and 'regmap-page' into regmap-nextMark Brown2012-07-223-15/+279
|\ \ | | | | | | | | | | | | | | | Conflicts (trivial context stuff): drivers/base/regmap/regmap.c include/linux/regmap.h
| | * regmap: Fix work_buf switching for page update during virtual range access.Krystian Garbaciak2012-06-191-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | After page update, orginal work_buf has to be restored regardless of the result. Signed-off-by: Krystian Garbaciak <krystian.garbaciak@diasemi.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| | * regmap: Add support for register indirect addressing.Krystian Garbaciak2012-06-172-5/+213
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Devices with register paging or indirectly accessed registers can configure register mapping to map those on virtual address range. During access to virtually mapped register range, indirect addressing is processed automatically, in following steps: 1. selector for page or indirect register is updated (when needed); 2. register in data window is accessed. Configuration should provide minimum and maximum register for virtual range, details of selector field for page selection, minimum and maximum register of data window for indirect access. Virtual range registers are managed by cache as well as direct access registers. In order to make indirect access more efficient, selector register should be declared as non-volatile, if possible. struct regmap_config is extended with the following: struct regmap_range_cfg *ranges; unsigned int n_ranges; [Also reordered debugfs init to later on since the cleanup code was conflicting with the new cleanup code for ranges anyway -- broonie] Signed-off-by: Krystian Garbaciak <krystian.garbaciak@diasemi.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| | * regmap: Move lock out from internal function _regmap_update_bits().Krystian Garbaciak2012-06-171-8/+14
| | | | | | | | | | | | | | | | | | | | | | | | Locks are moved to regmap_update_bits(), which allows to reenter internal function _regmap_update_bits() from inside of regmap read/write routines. Signed-off-by: Krystian Garbaciak <krystian.garbaciak@diasemi.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| | * regmap: Export regmap_reinit_cache()Mark Brown2012-06-081-0/+1
| | | | | | | | | | | | | | | | | | It's supposed to be there for drivers. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| | * regmap: Fix the size calculation for map->format.buf_sizeFabio Estevam2012-06-031-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The word to be transmitted/received via regmap is composed by the following parts: config->reg_bits config->val_bits config->pad_bits ,so the total size should be calculated by summing up the number of bits of each element and using a DIV_ROUND_UP to return the number of bytes. Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| | * regmap: clean up debugfs if regmap_init failsStephen Warren2012-06-031-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If debugfs isn't cleaned up, stale files will be left in the filesystem which will cause an OOPS when accessed the first time, and hang the accessing application when accessed again, presumably due to some lock being left held. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| * | 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: Fix incorrect arguments to kzalloc() callDimitris Papastamos2012-07-181-1/+1
| | | | | | | | | | Signed-off-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* | regmap: Add hook for printk logging for debugging during early initMark Brown2012-07-061-0/+23
| | | | | | | | | | | | | | | | | | | | Sometimes for failures during very early init the trace infrastructure isn't available early enough to be used. For this sort of problem defining LOG_DEVICE will add printks for basic register I/O on a specific device, allowing trace to be extracted when the trace system doesn't come up early enough to work with. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* | regmap: mmio: Staticize regmap_mmio_gen_context()Axel Lin2012-06-131-1/+1
| | | | | | | | | | | | | | | | regmap_mmio_gen_context() is only used in regmap-mmio.c. Thus make it static. Signed-off-by: Axel Lin <axel.lin@gmail.com> Acked-by: Stephen Warren <swarren@wwwdotorg.org> 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: mmio: request native endian formattingStephen Warren2012-06-031-8/+18
| | | | | | | | | | | | | | | | | | This will avoid the regmap core converting all addresses and values into big endian, only for the mmio bus driver to have to convert them back to native endian. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* | regmap: allow busses to request formatting with specific endiannessStephen Warren2012-06-031-11/+90
|/ | | | | | | | | | | | | Add a field to struct regmap_bus that allows bus drivers to request that register addresses and values be formatted with a specific endianness. The default endianness is unchanged from current operation: Big. Implement native endian formatting/parsing for 16- and 32-bit values. This will be enough to support regmap-mmio.c. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* i2c: Split I2C_M_NOSTART support out of I2C_FUNC_PROTOCOL_MANGLINGMark Brown2012-05-301-1/+1
| | | | | | | | | | | | | | | | | | Since there are uses for I2C_M_NOSTART which are much more sensible and standard than most of the protocol mangling functionality (the main one being gather writes to devices where something like a register address needs to be inserted before a block of data) create a new I2C_FUNC_NOSTART for this feature and update all the users to use it. Also strengthen the disrecommendation of the protocol mangling while we're at it. In the case of regmap-i2c we remove the requirement for mangling as I2C_M_NOSTART is the only mangling feature which is being used. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Jean Delvare <khali@linux-fr.org>
* regmap: Use select .. if to get IRQ_DOMAIN enabledMark Brown2012-05-231-0/+1
| | | | | | | | | Ensure that we can't get randconfig breakage by doing the IRQ_DOMAIN select automatically. Don't just do the select from REGMAP_IRQ to ensure that the select actually gets noticed. Reported-by: Randy Dunlap <rdunlap@xenotime.net> 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 Brown2012-05-1312-110/+557
|\ \ \ | | | | | | | | | | | | '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: Implement dev_get_regmap()Mark Brown2012-05-082-1/+61
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use devres to implement dev_get_regmap(). This should mean that in almost all cases devices wishing to take advantage of framework features based on regmap shouldn't need to explicitly pass the regmap into the framework. This simplifies device setup a bit. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| * | | Merge tag 'regmap-3.4' into regmap-strideMark Brown2012-05-121-1/+3
| |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | regmap: Last minute bug fix for 3.4 This is a last minute bug fix that was only just noticed since the code path that's being exercised here is one that is fairly rarely used. The changelog for the change itself is extremely clear and the code itself is obvious to inspection so should be pretty safe. Conflicts: drivers/base/regmap/regmap.c (overlap between the fix and stride code)
| | * | | regmap: fix possible memory corruption in regmap_bulk_read()Laxman Dewangan2012-05-091-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The function regmap_bulk_read() calls the regmap_read() for each register if set of register has volatile and cache is enabled. In this case, last few register read makes the memory corruption if the register size is not the size of unsigned int. The regam_read() takes argument as unsigned int for returning value and it update the value as *val = map->format.parse_val(map->work_buf); This causes complete 4 bytes (size of unsigned int) to get written. Now if client pass the memory pointer for value which is equal to the required size of register count in regmap_bulk_read() then last few register read actually update the memory beyond passed pointer size. Avoid this by using local variable for read and then do memcpy() for actual byte copy to passed pointer based on register size. I allocated one pointer ptr and take first 16 bytes dump of that pointer then call regmap_bulk_read() with pointer which is just on top of this allocated pointer and register count of 128. Here register size is 1 byte. The memory trace of last 5 register read are as follows: [ 5.438589] regmap_bulk_read after regamp_read() for register 122 [ 5.447421] 0xef993c20 0xef993c00 0x00000000 0x00000001 [ 5.467535] regmap_bulk_read after regamp_read() for register 123 [ 5.476374] 0xef993c20 0xef993c00 0x00000000 0x00000001 [ 5.496425] regmap_bulk_read after regamp_read() for register 124 [ 5.505260] 0xef993c20 0xef993c00 0x00000000 0x00000001 [ 5.525372] regmap_bulk_read after regamp_read() for register 125 [ 5.534205] 0xef993c00 0xef993c00 0x00000000 0x00000001 [ 5.554258] regmap_bulk_read after regamp_read() for register 126 [ 5.563100] 0xef990000 0xef993c00 0x00000000 0x00000001 [ 5.554258] regmap_bulk_read after regamp_read() for register 127 [ 5.587108] 0xef000000 0xef993c00 0x00000000 0x00000001 Here it is observed that the memory content at first word started changing on last 3 regmap_read() and so corruption happened. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| * | | | regmap: Devices using format_write don't support bulk operationsMark Brown2012-04-301-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Set the use_single_rw flag for devices that use format_write() since format_write() doesn't support any form of block operation. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| * | | | regmap: Converts group operation into single read write operationsAshish Jangam2012-04-302-4/+39
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some devices does not support bulk read and write operations, for them we have series of single write and read operations. Signed-off-by: Anthony Olech <Anthony.Olech@diasemi.com> Signed-off-by: Ashish Jangam <ashish.jangam@kpitcummins.com> [Fixed coding style, don't check use_single_rw before assign --broonie ] 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 Warren2012-04-108-42/+105
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
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| *---. \ \ \ Merge branches 'regmap-core', 'regmap-mmio' and 'regmap-naming' into ↵Mark Brown2012-04-1010-66/+373
| |\ \ \ \ \ \ | | |_|_|/ / / | |/| | | / / | | | | |/ / | | | |/| | regmap-stride
| | | | * | regmap: fix compilation when !CONFIG_DEBUG_FSStephen Warren2012-04-101-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 79c64d5 "regmap: allow regmap instances to be named" changed the prototype of regmap_debugfs_init, but didn't update the dummy inline used when !CONFIG_DEBUGFS. Fix this. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| | | | * | regmap: allow regmap instances to be namedStephen Warren2012-04-103-6/+15
| | | | |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some devices have multiple separate register regions. Logically, one regmap would be created per region. One issue that prevents this is that each instance will attempt to create the same debugfs files. Avoid this by allowing regmaps to be named, and use the name to construct the debugfs directory name. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| | | * | regmap: validate regmap_raw_read/write val_lenStephen Warren2012-04-071-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | val_len should be a multiple of val_bytes. If it's not, error out early. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| | | * | regmap: mmio: remove some error checks now in the coreStephen Warren2012-04-071-6/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | These error checks are implemented in regmap core. Remove the duplicate code from regmap-mmio.c Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| | | * | regmap: mmio: convert some error returns to BUG()Stephen Warren2012-04-071-8/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some of the error conditions detected by regmap_mmio_*() are pure internal errors, rather than user-/client-triggerable conditions. Convert these to BUG(). Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| | | * | regmap: add MMIO bus supportStephen Warren2012-04-063-0/+221
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a basic memory-mapped-IO bus for regmap. It has the following features and limitations: * Registers themselves may be 8, 16, 32, or 64-bit. 64-bit is only supported on 64-bit platforms. * Register offsets are limited to precisely 32-bit. * IO is performed using readl/writel, with no provision for using the __raw_readl or readl_relaxed variants. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| | | * | regmap: introduce fast_io busses, and use a spinlock for themStephen Warren2012-04-064-30/+64
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some bus types have very fast IO. For these, acquiring a mutex for every IO operation is a significant overhead. Allow busses to indicate their IO is fast, and enhance regmap to use a spinlock for those busses. [Currently limited to native endian registers -- broonie] Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| | | * | regmap: introduce explicit bus_context for bus callbacksStephen Warren2012-04-064-16/+30
| | | |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The only context needed by I2C and SPI bus definitions is the device itself; this can be converted to an i2c_client or spi_device in order to perform IO on the device. However, other bus types may need more context in order to perform IO. Enable this by having regmap_init accept a bus_context parameter, and pass this to all bus callbacks. The existing callbacks simply pass the struct device here. Future bus types may pass something else. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| * | | Merge tag 'regmap-3.4-fixes' of ↵Linus Torvalds2012-04-072-1/+8
| |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap Pull two more small regmap fixes from Mark Brown: - Now we have users for it that aren't running Android it turns out that regcache_sync_region() is much more useful to drivers if it's exported for use by modules. Who knew? - Make sure we don't divide by zero when doing debugfs dumps of rbtrees, not visible up until now because everything was providing at least some cache on startup. * tag 'regmap-3.4-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap: regmap: prevent division by zero in rbtree_show regmap: Export regcache_sync_region()
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