i2c, omap24xx: add i2c deblock sequenz

If a bus busy is detected when intializing the driver,
toggle 9 times the scl pin. Therefore enable the test mode
of the controller, in which the scl, sda pins can be
controlled manually.

Tested on the siemens boards pxm2, rut and dxr2.

Signed-off-by: Heiko Schocher <hs@denx.de>
Cc: Tom Rini <trini@ti.com>
Cc: Hannes Petermaier <oe5hpm@oevsv.at>
Cc: Lubomir Popov <lpopov@mm-sol.com>
Cc: Steve Sakoman <steve@sakoman.com>
Cc: Sandeep Paulraj <s-paulraj@ti.com>
Cc: Vincent Stehlé <v-stehle@ti.com>
Cc: Samuel Egli <samuel.egli@siemens.com>
fsl_i2c: add support for 3rd and 4th I2C

Add support for 3rd and 4th I2C.

Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com>
mtd: cfi_flash: fix clang warning

clang warns this check is silly; it is since s is
a local variable.

u-boot/drivers/mtd/cfi_flash.c:2363:13: warning: comparison of
  array 's' not equal to a null pointer is always true
  else if ((s != NULL) && (strcmp(s, "yes") == 0)) {

cc: Stefan Roese <sr@denx.de>
Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
lib: div64: add missing include

Include the function its prototype to prevent the warning
that it has no prototype.

Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
common: commands: make commands static

Since most commands are not public, make them static. This
prevents warnings that no common prototype is available.

Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
common: board_f: cosmetic use __weak for leds

First of all this looks a lot better, but it also
prevents a gcc warning (W=1), that the weak function
has no previous prototype.

cc: Simon Glass <sjg@chromium.org>
Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
Acked-by: Simon Glass <sjg@chromium.org>
dm: add missing includes

lists.c / root.c do not include their own header and they
could potentially implement a different function. Therefore
actually include the headers.

cc: sjg@chromium.org
Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
Acked-by: Simon Glass <sjg@chromium.org>
common:splash: use __weak

This not only looks a bit better it also prevents a
warning with W=1 (no previous prototype).

cc: agust@denx.de
Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
lib:lmb: use __weak

This not only looks a bit better it also prevents a
warning with W=1 (no previous prototype).

Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
common: main.c: make show_boot_progress __weak

This not only looks a bit better it also prevents a
warning with W=1 (no previous prototype).

Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
Acked-by: Simon Glass <sjg@chromium.org>
lib:sha1: remove unused constant

This prevents a clang warning.
Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
env_callback.h: spl: mark callback as maybe_unused

When static inline is used in a header file the function
should preferably be inlined and if not possible made a
static function. When declared inside a c file there is a
static function, which might be inlined. Since SPL uses a
define to declare the static inline it becomes part of the
c file although it is declared in a header and clang will
warn that you have introduced unused static functions. Add
maybe_unused to prevent such warnings.

Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
lib:vsprintf: reduce scope of pack_hex_byte

pack_hex_byte is only used when CONFIG_CMD_NET is
defined so limit it to that scope. This prevents
a clang warning.

Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
dirvers: mmc: use __weak

use weak instead of alias to prevent some clang warnings.
Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
common: bootm_os: make arch_preboot_os __weak

Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
yaffs2: cosmetic: remove self assignments

Remove self assignments which is just dead code to prevent
compiler warnings about non used arguments. For u-boot this
does not prevent any warning though, on the contrary it actual
introduces warnings when compiling with clang. Remove them.

Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
yaffs2: preprocessor cleanup

Current code uses the preprocessor to change an else case
to a statement without any if condition at all. Although
this works, change the optional code to return early, so
all optional code is contained within a single #ifdef.

Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
common: env_common: make env_get_char_spec __weak

Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
mmc: prevent some warnings with make W=1

Add missing prototypes for global functions and
make local functions static.

cc: panto@antoniou-consulting.com
Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
board: rpi_b: include mmc header and fix prototype

While at it add fdt_support.h as well.

cc: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>