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authorMark Brown <broonie@opensource.wolfsonmicro.com>2011-05-11 19:59:58 +0200
committerMark Brown <broonie@opensource.wolfsonmicro.com>2011-07-23 07:56:03 +0100
commitb83a313bf2520183641cf485d68cc273323597d2 (patch)
treee478834902bba3d4c774804d55a88c9b50bca2c0 /MAINTAINERS
parent620917de59eeb934b9f8cf35cc2d95c1ac8ed0fc (diff)
downloadvexpress-lsk-b83a313bf2520183641cf485d68cc273323597d2.tar.gz
regmap: Add generic non-memory mapped register access API
There are many places in the tree where we implement register access for devices on non-memory mapped buses, especially I2C and SPI. Since hardware designers seem to have settled on a relatively consistent set of register interfaces this can be effectively factored out into shared code. There are a standard set of formats for marshalling data for exchange with the device, with the actual I/O mechanisms generally being simple byte streams. We create an abstraction for marshaling data into formats which can be sent on the control interfaces, and create a standard method for plugging in actual transport underneath that. This is mostly a refactoring and renaming of the bottom level of the existing code for sharing register I/O which we have in ASoC. A subsequent patch in this series converts ASoC to use this. The main difference in interface is that reads return values by writing to a location provided by a pointer rather than in the return value, ensuring we can use the full range of the type for register data. We also use unsigned types rather than ints for the same reason. As some of the devices can have very large register maps the existing ASoC code also contains infrastructure for managing register caches. This cache work will be moved over in a future stage to allow for separate review, the current patch only deals with the physical I/O. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Liam Girdwood <lrg@ti.com> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Acked-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'MAINTAINERS')
-rw-r--r--MAINTAINERS7
1 files changed, 7 insertions, 0 deletions
diff --git a/MAINTAINERS b/MAINTAINERS
index 187282da921..b7eaf6393d3 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -5313,6 +5313,13 @@ L: reiserfs-devel@vger.kernel.org
S: Supported
F: fs/reiserfs/
+REGISTER MAP ABSTRACTION
+M: Mark Brown <broonie@opensource.wolfsonmicro.com>
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap.git
+S: Supported
+F: drivers/base/regmap/
+F: include/linux/regmap.h
+
RFKILL
M: Johannes Berg <johannes@sipsolutions.net>
L: linux-wireless@vger.kernel.org