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* SPDX: Convert all of our single license tags to Linux Kernel styleTom Rini2018-05-075-11/+5
| | | | | | | | | | | | | | | | | | | | When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
* Remove unnecessary instances of DECLARE_GLOBAL_DATA_PTRTom Rini2018-04-271-2/+0
| | | | | | | | We have a large number of places where while we historically referenced gd in the code we no longer do, as well as cases where the code added that line "just in case" during development and never dropped it. Signed-off-by: Tom Rini <trini@konsulko.com>
* libfdt: move headers to <linux/libfdt.h> and <linux/libfdt_env.h>Masahiro Yamada2018-03-051-1/+1
| | | | | | | | | | | | | | | | | Thomas reported U-Boot failed to build host tools if libfdt-devel package is installed because tools include libfdt headers from /usr/include/ instead of using internal ones. This commit moves the header code: include/libfdt.h -> include/linux/libfdt.h include/libfdt_env.h -> include/linux/libfdt_env.h and replaces include directives: #include <libfdt.h> -> #include <linux/libfdt.h> #include <libfdt_env.h> -> #include <linux/libfdt_env.h> Reported-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* udoo: Remove cpu type check prior to setup_sata()Fabio Estevam2017-10-311-2/+1
| | | | | | | | Inside setup_sata() there is a cpu type check, so there is no need to do this check in the board file. Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com> Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
* imx6: drop duplicated bss memset and board_init_r() callAnatolij Gustschin2017-09-181-6/+0
| | | | | | | | | | | | | | | | | bss section is cleared in crt0.S. board_init_r() is also entered from crt0 code. Signed-off-by: Anatolij Gustschin <agust@denx.de> Cc: Christian Gmeiner <christian.gmeiner@gmail.com> Cc: Nikita Kiryanov <nikita@compulab.co.il> Cc: Jagan Teki <jagan@amarulasolutions.com> Cc: Tim Harvey <tharvey@gateworks.com> Cc: Marek Vasut <marex@denx.de> Cc: Lukasz Majewski <lukma@denx.de> Cc: Fabio Estevam <fabio.estevam@nxp.com> Reviewed-by: Lukasz Majewski <lukma@denx.de> Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com> Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
* imx: imx6: Move gpr_init() function to soc.cBreno Lima2017-08-281-11/+0
| | | | | | | | | | Since the gpr_init() function is common for boards using MX6S, MX6DL, MX6D, MX6Q and MX6QP processors move it to the soc.c file. Signed-off-by: Breno Lima <breno.lima@nxp.com> Acked-by: Stefano Babic <sbabic@denx.de> Reviewed-by: Lukasz Majewski <lukma@denx.de> Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
* env: Rename setenv() to env_set()Simon Glass2017-08-162-3/+3
| | | | | | | | We are now using an env_ prefix for environment functions. Rename setenv() for consistency. Also add function comments in common.h. Suggested-by: Wolfgang Denk <wd@denx.de> Signed-off-by: Simon Glass <sjg@chromium.org>
* imx: reorganize IMX code as other SOCsStefano Babic2017-07-123-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Change is consistent with other SOCs and it is in preparation for adding SOMs. SOC's related files are moved from cpu/ to mach-imx/<SOC>. This change is also coherent with the structure in kernel. Signed-off-by: Stefano Babic <sbabic@denx.de> CC: Fabio Estevam <fabio.estevam@nxp.com> CC: Akshay Bhat <akshaybhat@timesys.com> CC: Ken Lin <Ken.Lin@advantech.com.tw> CC: Marek Vasut <marek.vasut@gmail.com> CC: Heiko Schocher <hs@denx.de> CC: "Sébastien Szymanski" <sebastien.szymanski@armadeus.com> CC: Christian Gmeiner <christian.gmeiner@gmail.com> CC: Stefan Roese <sr@denx.de> CC: Patrick Bruenn <p.bruenn@beckhoff.com> CC: Troy Kisky <troy.kisky@boundarydevices.com> CC: Nikita Kiryanov <nikita@compulab.co.il> CC: Otavio Salvador <otavio@ossystems.com.br> CC: "Eric Bénard" <eric@eukrea.com> CC: Jagan Teki <jagan@amarulasolutions.com> CC: Ye Li <ye.li@nxp.com> CC: Peng Fan <peng.fan@nxp.com> CC: Adrian Alonso <adrian.alonso@nxp.com> CC: Alison Wang <b18965@freescale.com> CC: Tim Harvey <tharvey@gateworks.com> CC: Martin Donnelly <martin.donnelly@ge.com> CC: Marcin Niestroj <m.niestroj@grinn-global.com> CC: Lukasz Majewski <lukma@denx.de> CC: Adam Ford <aford173@gmail.com> CC: "Albert ARIBAUD (3ADEV)" <albert.aribaud@3adev.fr> CC: Boris Brezillon <boris.brezillon@free-electrons.com> CC: Soeren Moch <smoch@web.de> CC: Richard Hu <richard.hu@technexion.com> CC: Wig Cheng <wig.cheng@technexion.com> CC: Vanessa Maegima <vanessa.maegima@nxp.com> CC: Max Krummenacher <max.krummenacher@toradex.com> CC: Stefan Agner <stefan.agner@toradex.com> CC: Markus Niebel <Markus.Niebel@tq-group.com> CC: Breno Lima <breno.lima@nxp.com> CC: Francesco Montefoschi <francesco.montefoschi@udoo.org> CC: Jaehoon Chung <jh80.chung@samsung.com> CC: Scott Wood <oss@buserror.net> CC: Joe Hershberger <joe.hershberger@ni.com> CC: Anatolij Gustschin <agust@denx.de> CC: Simon Glass <sjg@chromium.org> CC: "Andrew F. Davis" <afd@ti.com> CC: "Łukasz Majewski" <l.majewski@samsung.com> CC: Patrice Chotard <patrice.chotard@st.com> CC: Nobuhiro Iwamatsu <iwamatsu@nigauri.org> CC: Hans de Goede <hdegoede@redhat.com> CC: Masahiro Yamada <yamada.masahiro@socionext.com> CC: Stephen Warren <swarren@nvidia.com> CC: Andre Przywara <andre.przywara@arm.com> CC: "Álvaro Fernández Rojas" <noltari@gmail.com> CC: York Sun <york.sun@nxp.com> CC: Xiaoliang Yang <xiaoliang.yang@nxp.com> CC: Chen-Yu Tsai <wens@csie.org> CC: George McCollister <george.mccollister@gmail.com> CC: Sven Ebenfeld <sven.ebenfeld@gmail.com> CC: Filip Brozovic <fbrozovic@gmail.com> CC: Petr Kulhavy <brain@jikos.cz> CC: Eric Nelson <eric@nelint.com> CC: Bai Ping <ping.bai@nxp.com> CC: Anson Huang <Anson.Huang@nxp.com> CC: Sanchayan Maity <maitysanchayan@gmail.com> CC: Lokesh Vutla <lokeshvutla@ti.com> CC: Patrick Delaunay <patrick.delaunay@st.com> CC: Gary Bisson <gary.bisson@boundarydevices.com> CC: Alexander Graf <agraf@suse.de> CC: u-boot@lists.denx.de Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com> Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
* Kconfig: Add CONFIG_SATA to enable SATASimon Glass2017-07-111-1/+1
| | | | | | | | | At present CONFIG_CMD_SATA enables the 'sata' command which also brings in SATA support. Some boards may wish to enable SATA without the command. Add a separate CONFIG to permit this. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
* udoo: neo: Fix indentationFabio Estevam2017-01-021-2/+2
| | | | | | The standard way is to put ifdef/endif in the very first column. Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
* udoo_neo: Remove USDHC3 entryFabio Estevam2017-01-021-2/+1
| | | | | | | | Commit c94981efa20cc58 ("udoo_neo: Remove USDHC3 support") removed the SDHC3 support, but missed to remove the entry from the usdhc_cfg structure, so just remove it. Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
* udoo_neo: Add Ethernet supportBreno Lima2016-12-161-0/+95
| | | | | | | | UDOO Neo boards has one FEC port connected to KSZ8091, add support for it. Tested on a UDOO Neo Full with "dhcp zImage" command. Signed-off-by: Breno Lima <breno.lima@nxp.com>
* udoo_neo: Add PFUZE300 PMIC supportBreno Lima2016-12-161-0/+143
| | | | | | | | UDOO Neo boards has a PFUZE300 connected to I2C1 bus. Tested on a UDOO Neo Full with "pmic PFUZE3000 dump" command. Signed-off-by: Breno Lima <breno.lima@nxp.com>
* udoo_neo: Staticize board_string()Breno Lima2016-12-161-1/+1
| | | | | | | Change board_string() function to static because it's being used locally. Signed-off-by: Breno Lima <breno.lima@nxp.com> Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
* udoo_neo: Remove USDHC3 supportBreno Lima2016-12-161-88/+6
| | | | | | | | It's not necessary to support USDHC3 in U-Boot as it's being used for the WLAN. Signed-off-by: Breno Lima <breno.lima@nxp.com> Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
* mx6sx: Add initial support for UDOO Neo BoardBreno Lima2016-11-294-0/+466
| | | | | | | | | | | | | | | | | | | | | | UDOO Neo Board is a development board from Seco that has three models: - UDOO Neo Basic - UDOO Neo Basic Kick Starter - UDOO Neo Extended - UDOO Neo Full All versions are based on the i.MX6 SoloX processor. For more details about the UDOO Neo board, please refer to: http://www.udoo.org/udoo-neo/ This work is based on a previous commit of Francesco Montefoschi <francesco.monte@gmail.com>: https://github.com/fmntf/u-boot/commit/877b71184a5105e708024f232d36aed574961844 Only tested on the UDOO Neo Full board. Signed-off-by: Breno Lima <breno.lima@nxp.com> Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
* udoo: Add a README fileFabio Estevam2016-10-061-0/+21
| | | | | | | Add a README file to explain how to build and flash the SD card for Udoo boards. Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
* treewide: replace #include <asm/errno.h> with <linux/errno.h>Masahiro Yamada2016-09-232-2/+2
| | | | | | | | | | | Now, arch/${ARCH}/include/asm/errno.h and include/linux/errno.h have the same content. (both just wrap <asm-generic/errno.h>) Replace all include directives for <asm/errno.h> with <linux/errno.h>. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> [trini: Fixup include/clk.] Signed-off-by: Tom Rini <trini@konsulko.com>
* mx6: ddr: Allow changing REFSEL and REFR fieldsFabio Estevam2016-09-061-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently MX6 SPL DDR initialization hardcodes the REF_SEL and REFR fields of the MDREF register as 1 and 7, respectively for DDR3 and 0 and 3 for LPDDR2. Looking at the MDREF initialization done via DCD we see that boards do need to initialize these fields differently: $ git grep 0x021b0020 board/ board/bachmann/ot1200/mx6q_4x_mt41j128.cfg:DATA 4 0x021b0020 0x00005800 board/ccv/xpress/imximage.cfg:DATA 4 0x021b0020 0x00000800 /* MMDC0_MDREF */ board/freescale/mx6qarm2/imximage.cfg:DATA 4 0x021b0020 0x7800 board/freescale/mx6qarm2/imximage.cfg:DATA 4 0x021b0020 0x00005800 board/freescale/mx6qarm2/imximage_mx6dl.cfg:DATA 4 0x021b0020 0x00005800 board/freescale/mx6qarm2/imximage_mx6dl.cfg:DATA 4 0x021b0020 0x00005800 board/freescale/mx6qsabreauto/imximage.cfg:DATA 4 0x021b0020 0x00005800 board/freescale/mx6qsabreauto/mx6dl.cfg:DATA 4 0x021b0020 0x00005800 board/freescale/mx6qsabreauto/mx6qp.cfg:DATA 4 0x021b0020 0x00005800 board/freescale/mx6sabresd/mx6dlsabresd.cfg:DATA 4 0x021b0020 0x00005800 board/freescale/mx6sabresd/mx6q_4x_mt41j128.cfg:DATA 4 0x021b0020 0x00005800 board/freescale/mx6slevk/imximage.cfg:DATA 4 0x021b0020 0x00001800 board/freescale/mx6sxsabreauto/imximage.cfg:DATA 4 0x021b0020 0x00000800 board/freescale/mx6sxsabresd/imximage.cfg:DATA 4 0x021b0020 0x00000800 board/warp/imximage.cfg:DATA 4 0x021b0020 0x00001800 So introduce a mechanism for users to be able to configure REFSEL and REFR fields as needed. Keep all the mx6 SPL users in their current REF_SEL and REFR values, so no functional changes for the existing users. Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com> Reviewed-by: Eric Nelson <eric@nelint.com>
* MAINTAINERS/mailmap: Update my email addressFabio Estevam2016-01-111-1/+1
| | | | | | Update my email address to the NXP account. Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
* udoo: Fix the error handling in board_eth_init()Fabio Estevam2015-09-131-8/+11
| | | | | | | | | We should not return 0 on failure, so return a negative error code instead. Also centralize the error path so that is easier to follow. Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
* mx6: remove SYS_SOC from board KconfigPeng Fan2015-09-131-3/+0
| | | | | | | | | | | | | | | | | | | | | | | | | Remove duplicated SYS_SOC Kconfig entry from board Kconfig, because we have this entry in arch/arm/cpu/armv7/mx6/Kconfig. Signed-off-by: Peng Fan <Peng.Fan@freescale.com> Cc: Stefano Babic <sbabic@denx.de> Cc: Heiko Schocher <hs@denx.de> Cc: Christian Gmeiner <christian.gmeiner@gmail.com> Cc: Stefan Roese <sr@denx.de> Cc: Troy Kisky <troy.kisky@boundarydevices.com> Cc: Nikita Kiryanov <nikita@compulab.co.il> Cc: "Eric Bénard" <eric@eukrea.com> Cc: Fabio Estevam <fabio.estevam@freescale.com> Cc: Tim Harvey <tharvey@gateworks.com> Cc: Marek Vasut <marex@denx.de> Cc: Markus Niebel <Markus.Niebel@tq-group.com> Cc: Otavio Salvador <otavio@ossystems.com.br> Acked-by: Stefan Roese <sr@denx.de> Acked-by: Marek Vasut <marex@denx.de> Acked-by: Christian Gmeiner <christian.gmeiner@gmail.com> Acked-by: Markus Niebel <Markus.Niebel@tq-group.com> Acked-by: Troy Kisky <troy.kisky@boundarydevices.com> Acked-by: Igor Grinberg <grinberg@compulab.co.il>
* udoo: Switch to SPL supportvpeter42015-09-028-245/+328
| | | | | | | | | | | | | | | | | | | Currently we need to build one U-boot image for each of the udoo variants: quad and dual-lite. By switching to SPL we can support all two variants with a single binary. Based on the SPL for wandboard. Tested with OpenELEC (Open Embedded Linux Entertainment Center) on both boards. Signed-off-by: Peter Vicman <peter.vicman@gmail.com> Cc: Fabio Estevam <fabio.estevam@freescale.com> Cc: Stefano Babic <sbabic@denx.de> Acked-by: Stefano Babic <sbabic@denx.de> Signed-off-by: Peter Vicman <peter.vicman@gmail.com> Acked-by: Fabio Estevam <fabio.estevam@freescale.com>
* kconfig: arm: introduce symbol for ARM CPUsGeorges Savoundararadj2014-10-291-3/+0
| | | | | | | | | | | | | | | | | This commit introduces a Kconfig symbol for each ARM CPU: CPU_ARM720T, CPU_ARM920T, CPU_ARM926EJS, CPU_ARM946ES, CPU_ARM1136, CPU_ARM1176, CPU_V7, CPU_PXA, CPU_SA1100. Also, it adds the CPU feature Kconfig symbol HAS_VBAR which is selected for CPU_ARM1176 and CPU_V7. For each target, the corresponding CPU is selected and the definition of SYS_CPU in the corresponding Kconfig file is removed. Also, it removes redundant "string" type in some Kconfig files. Signed-off-by: Georges Savoundararadj <savoundg@gmail.com> Acked-by: Albert ARIBAUD <albert.u.boot@aribaud.net> Cc: Masahiro Yamada <yamada.m@jp.panasonic.com>
* kconfig: remove redundant "string" type in arch and board KconfigsMasahiro Yamada2014-09-131-4/+0
| | | | | | | | | | | | | | | | | | Now the types of CONFIG_SYS_{ARCH, CPU, SOC, VENDOR, BOARD, CONFIG_NAME} are specified in arch/Kconfig. We can delete the ones in arch and board Kconfig files. This commit can be easily reproduced by the following command: find . -name Kconfig -a ! -path ./arch/Kconfig | xargs sed -i -e ' /config[[:space:]]SYS_\(ARCH\|CPU\|SOC\|\VENDOR\|BOARD\|CONFIG_NAME\)/ { N s/\n[[:space:]]*string// } ' Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
* Add board MAINTAINERS filesMasahiro Yamada2014-07-301-0/+6
| | | | | | | | | | | | | | | | | | | | We have switched to Kconfig and the boards.cfg file is going to be removed. We have to retrieve the board status and maintainers information from it. The MAINTAINERS format as in Linux Kernel would be nice because we can crib the scripts/get_maintainer.pl script. After some discussion, we chose to put a MAINTAINERS file under each board directory, not the top-level one because we want to collect relevant information for a board into a single place. TODO: Modify get_maintainer.pl to scan multiple MAINTAINERS files. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Suggested-by: Tom Rini <trini@ti.com> Acked-by: Simon Glass <sjg@chromium.org>
* kconfig: add board Kconfig and defconfig filesMasahiro Yamada2014-07-301-0/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | This commit adds: - arch/${ARCH}/Kconfig provide a menu to select target boards - board/${VENDOR}/${BOARD}/Kconfig or board/${BOARD}/Kconfig set CONFIG macros to the appropriate values for each board - configs/${TARGET_BOARD}_defconfig default setting of each board (This commit was automatically generated by a conversion script based on boards.cfg) In Linux Kernel, defconfig files are located under arch/${ARCH}/configs/ directory. It works in Linux Kernel since ARCH is always given from the command line for cross compile. But in U-Boot, ARCH is not given from the command line. Which means we cannot know ARCH until the board configuration is done. That is why all the "*_defconfig" files should be gathered into a single directory ./configs/. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Acked-by: Simon Glass <sjg@chromium.org>
* udoo: Add SATA support on uDoo Board.Giuseppe Pagano2013-12-171-0/+4
| | | | | | | | Add SATA support on uDoo Board. Signed-off-by: Giuseppe Pagano <giuseppe.pagano@seco.com> CC: Stefano Babic <sbabic@denx.de> CC: Fabio Estevam <fabio.estevam@freescale.com>
* udoo: Fix watchdog during kernel boot.Giuseppe Pagano2013-11-281-0/+1
| | | | | | | | | | | | uDoo uses APX823-31W5 watchdog chip. Timeout is about 1.2 seconds. To disabled watchdog during kernel boot, WDI pin of that chip needs to be in "high impedance" state. I.mx6 gpio configuration does not contemplate tristate, so pin is set as input in high impedance. Signed-off-by: Giuseppe Pagano <giuseppe.pagano@seco.com> Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com> CC: Stefano Babic <sbabic@denx.de> CC: Fabio Estevam <fabio.estevam@freescale.com>
* udoo: Add ethernet support (FEC + Micrel KSZ9031).Giuseppe Pagano2013-11-281-0/+140
| | | | | | | | | | Add Ethernet and networking support on uDoo board (FEC +phy Micrel KSZ9031). Ethernet speed is currently limited to 10/100Mbps. Signed-off-by: Giuseppe Pagano <giuseppe.pagano@seco.com> Tested-by: Fabio Estevam <fabio.estevam@freescale.com> CC: Stefano Babic <sbabic@denx.de> CC: Fabio Estevam <fabio.estevam@freescale.com>
* udoo: Move and optimize platform register setting.Giuseppe Pagano2013-11-284-0/+203
| | | | | | | | | | | | | | | | Previous uDoo configuration adopts register settings for DDR3, clock, muxing, etc. taken from Nitrogen6x. uDoo schematics is rather different from that board, and it needs customized setting for most of the registers. All this changes can be considered atomical since it is part of initial support of the board. Patch changes uDoo configuration files path to a specific one, and adopt optimized value for every configured register. Signed-off-by: Giuseppe Pagano <giuseppe.pagano@seco.com> Tested-by: Fabio Estevam <fabio.estevam@freescale.com> CC: Stefano Babic <sbabic@denx.de> CC: Fabio Estevam <fabio.estevam@freescale.com>
* i.MX6DQ/DLS: replace pad names with their Linux kernel equivalentsEric Nelson2013-11-131-10/+10
| | | | Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
* Merge branch 'iu-boot/master' into 'u-boot-arm/master'Albert ARIBAUD2013-11-091-20/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: arch/arm/cpu/arm926ejs/mxs/Makefile board/compulab/cm_t35/Makefile board/corscience/tricorder/Makefile board/ppcag/bg0900/Makefile drivers/bootcount/Makefile include/configs/omap4_common.h include/configs/pdnb3.h Makefile conflicts are due to additions/removals of object files on the ARM branch vs KBuild introduction on the main branch. Resolution consists in adjusting the list of object files in the main branch version. This also applies to two files which are not listed as conflicting but had to be modified: board/compulab/common/Makefile board/udoo/Makefile include/configs/omap4_common.h conflicts are due to the OMAP4 conversion to ti_armv7_common.h on the ARM side, and CONFIG_SYS_HZ removal on the main side. Resolution is to convert as this icludes removal of CONFIG_SYS_HZ. include/configs/pdnb3.h is due to a removal on ARM side. Trivial resolution is to remove the file. Note: 'git show' will also list two files just because they are new: include/configs/am335x_igep0033.h include/configs/omap3_igep00x0.h
* udoo: Add initial support for mx6q udoo boardFabio Estevam2013-10-172-0/+136
Add basic support for mx6q udoo board. For further information about Udoo board: http://www.udoo.org/ Tested booting a mainline device tree kernel and a Yocto rootfs from mmc. Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>