linux-toradex.git/include/linux/i2c.h, branch v2.6.36-rc5

i2c: Multiplexed I2C bus core support

2010-08-11T16:21:02+00:00

Add multiplexed bus core support. I2C multiplexer and switches
like pca954x get instantiated as new adapters per port.

Signed-off-by: Michael Lawnick 
Acked-by: Rodolfo Giometti 
Signed-off-by: Jean Delvare

i2c: Use a separate mutex for userspace client lists

2010-08-11T16:21:01+00:00

Moving userspace-instantiated clients to separate lists wasn't nearly
enough to avoid deadlocks in multiplexed bus cases. We also want to
have a dedicated mutex to protect each list.

Signed-off-by: Jean Delvare 
Cc: Michael Lawnick

i2c: Move adapter locking helpers to i2c-core

2010-08-11T16:20:58+00:00

Uninline i2c adapter locking helper functions, move them to i2c-core,
and use them in i2c-core itself. The functions are still exported for
external users. This makes future updates to the locking model (which
will be needed for multiplexing support) possible and transparent.

Signed-off-by: Jean Delvare 
Cc: Michael Lawnick

V4L/DVB: Use custom I2C probing function mechanism

2010-08-11T16:20:57+00:00

Now that i2c-core offers the possibility to provide custom probing
function for I2C devices, let's make use of it.

Signed-off-by: Jean Delvare 
Acked-by: Mauro Carvalho Chehab

i2c: Add support for custom probe function

2010-08-11T16:20:56+00:00

The probe method used by i2c_new_probed_device() may not be suitable
for all cases. Let the caller provide its own, optional probe
function.

Signed-off-by: Jean Delvare 
Acked-by: Mauro Carvalho Chehab

i2c.h: fix kernel-doc warnings

2010-08-10T22:33:09+00:00

Fix kernel-doc warnings in linux/i2c.h:

  Warning(include/linux/i2c.h:176): No description found for parameter 'alert'
  Warning(include/linux/i2c.h:259): No description found for parameter 'of_node'

Signed-off-by: Randy Dunlap 
Signed-off-by: Linus Torvalds

Merge remote branch 'origin' into secretlab/next-devicetree

2010-05-22T06:36:56+00:00

Merging in current state of Linus' tree to deal with merge conflicts and
build failures in vio.c after merge.

Conflicts:
	drivers/i2c/busses/i2c-cpm.c
	drivers/i2c/busses/i2c-mpc.c
	drivers/net/gianfar.c

Also fixed up one line in arch/powerpc/kernel/vio.c to use the
correct node pointer.

Signed-off-by: Grant Likely

i2c-core: Use per-adapter userspace device lists

2010-05-04T09:09:28+00:00

Using a single list for all userspace devices leads to a dead lock
on multiplexed buses in some circumstances (mux chip instantiated
from userspace). This is solved by using a separate list for each
bus segment.

Signed-off-by: Jean Delvare 
Acked-by: Michael Lawnick

i2c/of: Allow device node to be passed via i2c_board_info

2010-04-29T00:21:56+00:00

The struct device_node *of_node pointer is moving out of dev->archdata
and into the struct device proper.  of_i2c.c needs to set the of_node
pointer before the device is registered.  Since the i2c subsystem
doesn't allow 2 stage allocation and registration of i2c devices, the
of_node pointer needs to be passed via the i2c_board_info structure
so that it is set prior to registration.

This patch adds of_node to struct i2c_board_info (conditional on
CONFIG_OF), sets of_node in i2c_new_device(), and modifies of_i2c.c
to use the new parameter.  The calling of dev_archdata_set_node()
from of_i2c will be removed in a subsequent patch when of_node is
removed from archdata and all users are converted over.

Signed-off-by: Grant Likely

i2c: Document the message size limit

2010-03-02T11:23:49+00:00

i2c_master_send & i2c_master_recv do not support more than 64 kb
transfer, since msg.len is u16.

Signed-off-by: Zhangfei Gao 
Signed-off-by: Jean Delvare