For many drivers which will support rich endianness of Devices
need define DT properties by itself with the binding support.
The endianness using regmap:
Index Device Properties if needs bytes-swap,
or just ignore it
-------------------------------------------------------------
1 BE 'big-endian'
2 LE 'little-endian'
The properties include all the register values and the buffers.
And these properties are very usful for the MMIO devices:
Such as: a memory-mapped device, on one SoC is in BE mode, while
in another SoC will be in LE mode, and the CPU will always in LE
mode.
For the first case, we must use cpu_to_be32/be32_to_cpu for
32-bit registers accessing, so the 'big-endian' property is needed.
For the second case, we can just ignore the bytes-swap
functions like cpu_to_le32/le32_to_cpu, so the 'little-endian'
property could be abscent.
And vice versa...
Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
None of these files are actually using any __init type directives
and hence don't need to include <linux/init.h>. Most are just a
left over from __devinit and __cpuinit removal, or simply due to
code getting copied from one driver to the next.
Cc: Len Brown <len.brown@intel.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
If the value is zero then assume it has been included in the register data
and don't send anything, minimising the number of interactions with the
hardware.
Signed-off-by: Mark Brown <broonie@linaro.org>
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>
Save error handling and unwinding code in drivers by providing managed
versions of the regmap init functions, simplifying usage.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* 'for-linus' of git://opensource.wolfsonmicro.com/regmap: (62 commits)
mfd: Enable rbtree cache for wm831x devices
regmap: Support some block operations on cached devices
regmap: Allow caches for devices with no defaults
regmap: Ensure rbtree syncs registers set to zero properly
regmap: Allow rbtree to cache zero default values
regmap: Warn on raw I/O as well as bulk reads that bypass cache
regmap: Return a sensible error code if we fail to read the cache
regmap: Use bsearch() to search the register defaults
regmap: Fix doc comment
regmap: Optimize the lookup path to use binary search
regmap: Ensure we scream if we enable cache bypass/only at the same time
regmap: Implement regcache_cache_bypass helper function
regmap: Save/restore the bypass state upon syncing
regmap: Lock the sync path, ensure we use the lockless _regmap_write()
regmap: Fix apostrophe usage
regmap: Make _regmap_write() global
regmap: Fix lock used for regcache_cache_only()
regmap: Grab the lock in regcache_cache_only()
regmap: Modify map->cache_bypass directly
regmap: Fix regcache_sync generic implementation
...
No longer used as users link directly with the bus types so the core
module infrastructure does refcounting for us.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Commit b33f9cbd67 ("regmap: Specify a module license") added a
MODULES_LICENSE to this file without adding an include of module.h.
module.h should have been included anyway, since this file has
EXPORT_SYMBOLs as well. With the pending module.h split up, this would
probably have caused build problems.
Cc: Stephen Warren <swarren@nvidia.com>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
CONFIG_REGMAP_I2C/SPI are set to m when selected by a tristate config
option that's set to m. The regmap modules don't specify a license, so
fail to link to regmap_init at load time, since that is EXPORT_SYMBOL_GPL.
Fix this by specifying a license for the regmap modules.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
