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authorLinus Torvalds <torvalds@linux-foundation.org>2020-12-15 15:34:38 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2020-12-15 15:34:38 -0800
commita45f1d43311d3a4f6534e48a3655ba3247a59d48 (patch)
tree53450c544916ff1bff5b10a8753abf3d1b5dbfe6 /include
parent2cffa11e2aa76a0560c890f057858b68fe744d03 (diff)
parent4616c509d187d2afda4a8f1121c2a3ef16bbcefe (diff)
Merge tag 'regmap-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap
Pull regmap updates from Mark Brown: "This is quite a busy release for regmap with two substantial features being added: - Support for register maps Soundwire 1.2 multi-byte operations, allowing atomic support for registers larger than a single byte. - Support for relaxed I/O without barriers in MMIO regmaps, allowing them to be used efficiently on systems where default MMIO operations include barriers. There was also an addition and revert of use of the new Soundwire support for RT715 due to build issues with the driver built in, my tests only covered building it as a module, the patch wasn't just dropped as it had already been merged elsewhere" * tag 'regmap-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap: ASoC: rt715: Fix build regmap: sdw: add required header files regmap: Remove duplicate `type` field from regmap `regcache_sync` trace event regmap: Fix order of regmap write log regmap: mmio: add config option to allow relaxed MMIO accesses
Diffstat (limited to 'include')
-rw-r--r--include/linux/regmap.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index a652d1474d6a..2cc4ecd36298 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -315,6 +315,10 @@ typedef void (*regmap_unlock)(void *);
* masks are used.
* @zero_flag_mask: If set, read_flag_mask and write_flag_mask are used even
* if they are both empty.
+ * @use_relaxed_mmio: If set, MMIO R/W operations will not use memory barriers.
+ * This can avoid load on devices which don't require strict
+ * orderings, but drivers should carefully add any explicit
+ * memory barriers when they may require them.
* @use_single_read: If set, converts the bulk read operation into a series of
* single read operations. This is useful for a device that
* does not support bulk read.
@@ -388,6 +392,7 @@ struct regmap_config {
bool use_single_read;
bool use_single_write;
+ bool use_relaxed_mmio;
bool can_multi_write;
enum regmap_endian reg_format_endian;