Hi, The CFA-10036 is actually a module that can be plugged in an expansion board. For now, there is only two of these expansion boards, the CFA-10037 and the CFA-10049, with different features, muxing and so on. So, at boot time, the cfa-10036 has to be aware that it runs on an expansion board and if so, which expansion board it is currently plugged in, so that it can load the right device tree. This is done thanks to an eeprom found at the same address on the same bus on the expansion boards, that holds the expansion board id, so we can know all of this. This patchset does exactly that. It first adds support for the AT24, and then the needed bits to retrieve the board variants from the eeprom if any and load the right DTB. Thanks, Maxime Maxime Ripard (3): ARM: cfa10036: Add the AT24HC02 I2C EEPROM ARM: cfa10036: Retrieve the board variant from the AT24 ARM: cfa10036: Use the board variant to load a different device tree arch/arm/boards/crystalfontz-cfa10036/Makefile | 2 +- arch/arm/boards/crystalfontz-cfa10036/cfa10036.c | 27 ++++++ .../boards/crystalfontz-cfa10036/env/boot/mmc-ext3 | 4 +- arch/arm/boards/crystalfontz-cfa10036/hwdetect.c | 97 ++++++++++++++++++++ arch/arm/boards/crystalfontz-cfa10036/hwdetect.h | 22 +++++ arch/arm/configs/cfa10036_defconfig | 3 +- arch/arm/mach-mxs/Kconfig | 3 + 7 files changed, 154 insertions(+), 4 deletions(-) create mode 100644 arch/arm/boards/crystalfontz-cfa10036/hwdetect.c create mode 100644 arch/arm/boards/crystalfontz-cfa10036/hwdetect.h -- 1.7.9.5 _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
