kernel/linux.git/drivers/base/regmap/internal.h, branch v3.11.1

Merge remote-tracking branch 'regmap/topic/field' into regmap-next

2013-06-30T11:40:03+00:00

regmap: Add regmap_field APIs

2013-06-12T15:27:44+00:00

It is common to access regmap registers at bit level, using regmap_update_bits or regmap_read functions, however the end user has to take care of a mask or shifting. This becomes overhead when such use cases are high. Having a common function to do this is much convenient and less error prone. The idea of regmap_field is simple, regmap_field gives a logical structure to bits of the regmap register, and the driver can use this logical entity without the knowledge of the bit positions and masks all over the code. This way code looks much neat and it need not handle the masks, shifts every time it access the those entities. With this new regmap_field_read/write apis the end user can setup a regmap field using regmap_field_init and use the return regmap_field to read write the register field without worrying about the masks or shifts. Also this apis will be useful for drivers which are based on regmaps, like some clocks or pinctrls which can work on the regmap_fields directly without having to worry about bit positions. Signed-off-by: Srinivas Kandagatla Signed-off-by: Mark Brown

regmap: Make regmap-mmio usable from atomic contexts

2013-05-25T15:16:02+00:00

regmap-mmio uses a spinlock with spin_lock() and spin_unlock() for locking. To be able to use the regmap API from different contexts (atomic vs non-atomic), without the risk of race conditions, we need to use spin_lock_irqsave() and spin_lock_irqrestore() instead. A new field, the spinlock_flags field, is added to regmap struct to store the flags between regmap_{,un}lock_spinlock(). The spinlock_flags field itself is also protected by the spinlock. Thanks to Stephen Warren for the suggestion of this particular solution. Signed-off-by: Lars-Peter Clausen Reviewed-by: Stephen Warren Signed-off-by: Mark Brown

regmap: Add support for discarding parts of the register cache

2013-05-12T14:46:47+00:00

Allow drivers to discard parts of the register cache, for example if part of the hardware has been reset. Signed-off-by: Mark Brown

Merge remote-tracking branch 'regmap/topic/range' into regmap-next

2013-04-16T15:05:50+00:00

regmap: cache: Factor out block sync

2013-03-30T13:52:25+00:00

The idea of holding blocks of registers in device format is shared between at least rbtree and lzo cache formats so split out the loop that does the sync from the rbtree code so optimisations on it can be reused. Signed-off-by: Mark Brown Reviewed-by: Dimitris Papastamos

regmap: cache: Factor out reg_present support from rbtree cache

2013-03-30T13:49:17+00:00

The idea of maintaining a bitmap of present registers is something that can usefully be used by other cache types that maintain blocks of cached registers so move the code out of the rbtree cache and into the generic regcache code. Refactor the interface slightly as we go to wrap the set bit and enlarge bitmap operations (since we never do one without the other) and make it more robust for reads of uncached registers by bounds checking before we look at the bitmap. Signed-off-by: Mark Brown Reviewed-by: Dimitris Papastamos

regmap: cache: Provide a get address of value operation

2013-03-26T21:38:16+00:00

Provide a helper to do the size based index into a block of registers and use it when reading a value. Signed-off-by: Mark Brown

regmap: core: Make raw write available to regcache

2013-03-26T19:17:32+00:00

This allows the cache to sync values directly to the device when stored in native format and also allows asynchronous I/O. Signed-off-by: Mark Brown

regmap: debugfs: Add a registers `range' file

2013-03-04T02:33:03+00:00

This file lists the register ranges in the register map. The condition to split the range is based on whether the block is readable or not. Ensure that we lock the `debugfs_off_cache' list whenever we access and modify the list. There is a possible race otherwise between the read() operations of the `registers' file and the `range' file. Signed-off-by: Dimitris Papastamos Signed-off-by: Mark Brown