Check for bmode before reading the boot device
to check if a serial downloader is started,
and returns UART if the serial downloader is set,
letting SPL to wait for an image if
CONFIG_SPL_YMODEM_SUPPORT is set.

This allows to load again a SPL based board
with imx_usb_loader together with a tool
such as kermit.

Signed-off-by: Stefano Babic <sbabic@denx.de>
CC: Tim Harvey <tharvey@gateworks.com>
CC: Fabio Estevam <Fabio.Estevam@freescale.com>
CC: Eric Nelson <eric.nelson@boundarydevices.com>
Reviewed-by: Eric Nelson <eric@nelint.com>
Tested-by: Eric Nelson <eric@nelint.com>

For some board designs, it might be useful to switch the DC-DC
clock source to something else rather the default 24 MHz, e.g.
for EMI reasons.

For this, override the mxs_power_setup_dcdc_clocksource function
in your board support files.

Example:
void mxs_power_setup_dcdc_clocksource(void)
{
    mxs_power_switch_dcdc_clocksource(POWER_MISC_FREQSEL_20MHZ);
}

Signed-off-by: Michael Heimpold <mhei@heimpold.de>
Cc: Marek Vasut <marex@denx.de>
Cc: Otavio Salvador <otavio@ossystems.com.br>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Marek Vasut <marex@denx.de>

Drop duplicated debug info for tcl.

Signed-off-by: Peng Fan <Peng.Fan@freescale.com>
Cc: Stefano Babic <sbabic@denx.de>

Conflicts:
	include/configs/axs101.h

Signed-off-by: Tom Rini <trini@konsulko.com>

Make sure the NAND reset is not asserted in full U-Boot.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Dinh Nguyen <dinguyen@opensource.altera.com>
Cc: Chin Liang See <clsee@altera.com>

If the system boots from NAND, make sure to de-assert the NAND IP
reset, otherwise the system will get stuck.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Dinh Nguyen <dinguyen@opensource.altera.com>

Define the NAND reset bit and fix the ordering of the macros.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Dinh Nguyen <dinguyen@opensource.altera.com>

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

When we want to boot Linux with a DTB file downloaded from a TFTP
server or somewhere, we need to know the file name to be downloaded.

Assume the U-Boot configuration is shared among some similar boards.
If they are similar enough, the difference only appears in device
trees.  The build procedure would be like this:

 - Board A:  make foo_common_defconfig && make DEVICE_TREE=foo_board_a
 - Board B:  make foo_common_defconfig && make DEVICE_TREE=foo_board_b
 - Board C:  make foo_common_defconfig && make DEVICE_TREE=foo_board_c

In this case, the U-Boot image contains nothing about the DTB file name
it is running with.  (CONFIG_DEFAULT_DEVICE_TREE is not helpful for this
purpose because it is painful to change it from "make menuconfig" for
each board.)

This commit allows to lookup the DTB file name based on the compatible
string and set it to "fdt_file" environment.  Then "tftpboot $fdt_file"
will download the file we want.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>