aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/base/regmap
Commit message (Collapse)AuthorAge
...
| * | | | | regmap: irq: Allow users to retrieve the irq_domainMark Brown2012-10-14
| |/ / / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* | | | | Merge remote-tracking branch 'regmap/topic/debugfs' into regmap-nextMark Brown2012-12-10
|\ \ \ \ \ | |_|_|/ / |/| | | |
| * | | | regmap: debugfs: Cache offsets of valid regions for dumpMark Brown2012-12-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Avoid doing a linear scan of the entire register map for each read() of the debugfs register dump by recording the offsets where valid registers exist when we first read the registers file. This assumes the set of valid registers never changes, if this is not the case invalidation of the cache will be required. This could be further improved for large blocks of contiguous registers by calculating the register we will read from within the block - currently we do a linear scan of the block. An rbtree may also be worthwhile. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| * | | | regmap: debugfs: Factor out initial seekMark Brown2012-12-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In preparation for doing things a bit more quickly than a linear scan factor out the initial seek from the debugfs register dump. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| * | | | regmap: debugfs: Avoid overflows for very small readsMark Brown2012-12-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If count is less than the size of a register then we may hit integer wraparound when trying to move backwards to check if we're still in the buffer. Instead move the position forwards to check if it's still in the buffer, we are unlikely to be able to allocate a buffer sufficiently big to overflow here. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Cc: stable@vger.kernel.org
| * | | | regmap: Cache register and value sizes for debugfsMark Brown2012-12-06
| | |_|/ | |/| | | | | | | | | | | | | | | | | | No point in calculating them every time. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| * | | regmap: Fix printing of size_t variableFabio Estevam2012-10-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | val_bytes is of 'size_t', so it should be printed as '%zu'. Fixes the following build warning on x86: drivers/base/regmap/regmap.c:872:4: warning: format '%d' expects argument of type 'int', but argument 5 has type 'size_t' [-Wformat] Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| * | | regmap: Split raw writes that cross window boundariesMark Brown2012-10-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If a block write covers a paged memory region and crosses a window boundary then rather than failing the write split the transfer up into multiple writes, making the whole process more transparent for drivers. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| * | | regmap: Make return code checks consistentMark Brown2012-10-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The range code was written to check for return codes less than zero as errors but throughout the rest of the API return codes not equal to zero are errors. Change all these checks to match the house style. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| * | | regmap: Factor range lookup out of page selectionMark Brown2012-10-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This will support a subsequent update to allow bulk writes to cross window boundaries. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| * | | regmap: Provide debugfs read of register rangesMark Brown2012-10-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | If a register range is named then provide a debugfs file showing the contents of the range separately. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| * | | regmap: Factor out debugfs register readMark Brown2012-10-14
| | | | | | | | | | | | | | | | | | | | | | | | This will allow the use of the same code for reading register ranges. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| * | | regmap: Allow ranges to be namedMark Brown2012-10-14
| | | | | | | | | | | | | | | | | | | | | | | | For more useful diagnostics. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| * | | regmap: When we sanity check during range adds say what errors we findMark Brown2012-10-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rather than just returning a single error code for every possible thing we can notice print an error message saying what the problem was. This makes it very much easier to figure out what's wrong and fix it. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| * | | regmap: Rename n_ranges to num_rangesMark Brown2012-10-14
| |/ / | | | | | | | | | | | | | | | | | | | | | This makes things consistent with the rest of the API and is actually what the documentation says. We don't currently have any in tree users so low cost. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* | / regmap: core: Report registers in hex when we can't cacheMark Brown2012-10-30
| |/ |/| | | | | | | | | | | This seems to be the most common way of reporting register numbers, it's certainly what we do for trace. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* | regmap: select REGMAP if REGMAP_MMIO and REGMAP_IRQ enabledDong Aisheng2012-10-17
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The regmap_mmio and regmap_irq depend on regmap core, if not select, we may not compile regmap core and meet compiling errors as follows if REGMAP_MMIO is selected by client drivers: drivers/mfd/syscon.c:94:15: error: variable 'syscon_regmap_config' has initializer but incomplete type drivers/mfd/syscon.c:95:2: error: unknown field 'reg_bits' specified in initializer drivers/mfd/syscon.c:95:2: warning: excess elements in struct initializer [enabled by default] drivers/mfd/syscon.c:95:2: warning: (near initialization for 'syscon_regmap_config') [enabled by default] drivers/mfd/syscon.c:96:2: error: unknown field 'val_bits' specified in initializer drivers/mfd/syscon.c:96:2: warning: excess elements in struct initializer [enabled by default] drivers/mfd/syscon.c:96:2: warning: (near initialization for 'syscon_regmap_config') [enabled by default] drivers/mfd/syscon.c:97:2: error: unknown field 'reg_stride' specified in initializer drivers/mfd/syscon.c:97:2: warning: excess elements in struct initializer [enabled by default] drivers/mfd/syscon.c:97:2: warning: (near initialization for 'syscon_regmap_config') [enabled by default] drivers/mfd/syscon.c: In function 'syscon_probe': drivers/mfd/syscon.c:124:2: error: invalid use of undefined type 'struct regmap_config' drivers/mfd/syscon.c:125:2: error: implicit declaration of function 'devm_regmap_init_mmio' [-Werror=implicit-function-declaration] drivers/mfd/syscon.c:125:17: warning: assignment makes pointer from integer without a cast [enabled by default] cc1: some warnings being treated as errors drivers/mfd/Kconfig: config MFD_SYSCON bool "System Controller Register R/W Based on Regmap" depends on OF select REGMAP_MMIO help Select this option to enable accessing system control registers via regmap. Signed-off-by: Dong Aisheng <dong.aisheng@linaro.org> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
*-. Merge remote-tracking branches 'regmap/topic/cache' and 'regmap/topic/irq' ↵Mark Brown2012-09-22
|\ \ | | | | | | | | | into regmap-next
| | * regmap: no need primary handler for nested irqYunfan Zhang2012-09-08
| | | | | | | | | | | | | | | | | | | | | | | | 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 Tian2012-08-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 Brown2012-08-07
| | | | | | | | | | | | | | | | | | | | | | | | 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 Warren2012-08-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 Warren2012-08-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 Warren2012-08-04
| | | | | | | | | | | | | | | | | | | | | | | | 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 Warren2012-08-04
| | | | | | | | | | | | | | | | | | | | | | | | 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 Brown2012-08-04
| | | | | | | | | | | | | | | | | | | | | | | | 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 Warren2012-08-04
| |/ |/| | | | | | | | | | | | | | | | | 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 Papastamos2012-08-04
|/ | | | | | | | | | | | 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 Brown2012-07-22
|\ \ | | | | | | | | | | | | | | | 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 Garbaciak2012-06-19
| | | | | | | | | | | | | | | | | | | | | | | | 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 Garbaciak2012-06-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 Garbaciak2012-06-17
| | | | | | | | | | | | | | | | | | | | | | | | 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 Brown2012-06-07
| | | | | | | | | | | | | | | | | | 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 Estevam2012-06-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 Warren2012-06-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 Brown2012-06-05
| | | | | | | | | | | | | | | | | | | | | | | | 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 Brown2012-06-05
| |/ | | | | | | | | | | | | | | 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 Papastamos2012-07-18
| | | | | | | | | | 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 Brown2012-07-06
| | | | | | | | | | | | | | | | | | | | 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 Lin2012-06-13
| | | | | | | | | | | | | | | | 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 Brown2012-06-03
| | | | | | | | | | | | 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 Warren2012-06-03
| | | | | | | | | | | | | | | | | | 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 Warren2012-06-03
|/ | | | | | | | | | | | | 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 Brown2012-05-30
| | | | | | | | | | | | | | | | | | 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 Brown2012-05-23
| | | | | | | | | 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 Brown2012-05-17
| | | | Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* regmap: add support for non contiguous status to regmap-irqGraeme Gregory2012-05-14
| | | | | | | | | | 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 Brown2012-05-13
| | | | | | | | | | | | | | | | 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 Brown2012-05-13
|\ \ \ | | | | | | | | | | | | 'regmap-irq' into regmap-next
| | | * regmap: Pass back the allocated regmap IRQ controller dataMark Brown2012-05-13
| | | | | | | | | | | | | | | | | | | | | | | | It's needed for freeing and for obtaining the IRQ base later on. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
generated by cgit v1.2.2 (git 2.25.0) at 2025-08-06 17:06:16 -0400