u-boot.git/drivers/i2c, branch v2011.03

I2C: mxc_i2c: address failure with mx35 processor

2011-02-01T23:54:43+00:00

There is sporadic failures when more as one I2C slave
is on the bus and the processor tries to communicate
with more as one slave.
The problem was seen on a mx35pdk (two I2C slaves,
PMIC controller and CAN/RTC chip).

The current driver uses the IIF bit in the status register
to check if the bus is busy or not. According to the manual,
this is not correct, because the IIB bit should be checked.
Not only, to check if a transfer is finished must be checked
the ICF bit, and this is not tested at all.

This patch comes from analyse with a corresponding driver
provided by Freescale as part of the LTIB tool. Comparing
the two drivers, it appears that the current u-boot driver checks
the wrong bits, and depending on race condition, the transfer
can be successful or not.

The patch gets rid also of own debug function (DPRINTF),
replaced with the general debug().

Tested on Freescale mx35pdk.

Signed-off-by: Stefano Babic 
CC: Heiko Schocher 
Acked-by: Heiko Schocher

I2C: mxc_i2c: get rid of __REG access

2011-02-01T23:54:42+00:00

This driver accesses to processor's register
via __REG macros, that are removed (or are planned
to be removed) and replaced by C structures.
This patches replaces all occurrencies of __REG macros.

Signed-off-by: Stefano Babic 
CC: Heiko Schocher 
Acked-by: Heiko Schocher

mxc_i2c: Add support for the i.MX35 processor

2011-02-01T23:54:42+00:00

Signed-off-by: Stefano Babic 
CC: Heiko Schocher 
Acked-by: Heiko Schocher

mxc_i2c: add support for MX53 processor

2011-02-01T23:54:42+00:00

This patch add I2C support for Freescale MX53 processor

Signed-off-by: Jason Liu

Fix at91 includes in soft_i2c driver

2011-01-27T06:27:32+00:00

Make at91 header includes in soft_i2c depend only on CONFIG_AT91FAMILY
rather than individual SoCs.

Signed-off-by: Ryan Mallon 
Acked-by: Reinhard Meyer

Move DECLARE_GLOBAL_DATA_PTR to file scope

2010-12-21T10:33:36+00:00

It can be optimised out by the compiler otherwise resulting
in obscure errors like a board not booting.

This has been documented in README since 2006 when these were
first fixed up for GCC 4.x.

Signed-off-by: John Rigby 

Fix some additional places.

Signed-off-by: Wolfgang Denk 
Acked-By: Albert ARIBAUD

Switch from archive libraries to partial linking

2010-11-17T20:02:18+00:00

Before this commit, weak symbols were not overridden by non-weak symbols
found in archive libraries when linking with recent versions of
binutils.  As stated in the System V ABI, "the link editor does not
extract archive members to resolve undefined weak symbols".

This commit changes all Makefiles to use partial linking (ld -r) instead
of creating library archives, which forces all symbols to participate in
linking, allowing non-weak symbols to override weak symbols as intended.
This approach is also used by Linux, from which the gmake function
cmd_link_o_target (defined in config.mk and used in all Makefiles) is
inspired.

The name of each former library archive is preserved except for
extensions which change from ".a" to ".o".  This commit updates
references accordingly where needed, in particular in some linker
scripts.

This commit reveals board configurations that exclude some features but
include source files that depend these disabled features in the build,
resulting in undefined symbols.  Known such cases include:
- disabling CMD_NET but not CMD_NFS;
- enabling CONFIG_OF_LIBFDT but not CONFIG_QE.

Signed-off-by: Sebastien Carlier

Merge branch 'master' of git://git.denx.de/u-boot-samsung

2010-10-29T19:47:48+00:00

Add generic support for samsung s3c2440

2010-10-28T06:35:56+00:00

This patch adds generic support for the Samsung s3c2440 processor.

Global s3c24x0 changes to struct members converting from upper case to
lower case.

Signed-off-by: Craig Nauman 
Cc: kevin.morfitt@fearnside-systems.co.uk
Signed-off-by: Minkyu Kang

ARMV7: OMAP: I2C driver: Fix bug found in 37XX testing

2010-10-25T05:57:20+00:00

On OMAP36/37XX the standard on chip pullups are not sufficient to
ensure proper i2c operation without external pullups or switching
to high speed mode and enabling special on chip pullups.

This is an issue for Beagle xM, which does not have external pullups
on the expansion board i2c lines.

The issue manifests itself as an AL (arbitration lost) error when
probing for a non-existent device (i.e. on a Beagle xM with no expansion
boards attached).  This issue does not occur on expansion boards that
include pullups or on Overo 37XX COM's since they include pull-ups.

This patch fixes the issue by checking for the AL bit in the i2c_probe
function.

Signed-off-by: Steve Sakoman