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authorStephen Warren <swarren@nvidia.com>2012-05-24 11:38:39 +0000
committerAlbert ARIBAUD <albert.u.boot@aribaud.net>2012-07-07 14:07:21 +0200
commitf9f2f12e2cace3685ea0dbb6b6d78789fb75f043 (patch)
treefc78d2768741b6f81c7d57fb734f36b95f230fcd /include/configs/paz00.h
parente87c2bda9c45bcfcc8239f6052d6fa9aec7351d6 (diff)
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tegra: seaboard: disable SPI, move environment to eMMC
The SPI hardware on Seaboard is too broken to use; it is muxed with the console UART and requires evil interactions between the SPI and UART drivers to work even partially. The current code in U-Boot is not sufficient to make this work correctly; auto boot is aborted due to corruption in the UART RX channel interrupting it. Instead, move the environment to eMMC, at the end of the second boot sector. This should not conflict with any other eMMC usage, irrespective of whether the board boots from SPI, NAND, or eMMC: if U-Boot is stored in eMMC, it will be stored well below this location. The kernel only uses the general area of the eMMC once booted, not the boot sectors. Boards that are derivatives of Seaboard don't have the muxing issue, and should/could have a separate U-Boot configuration file that does enable SPI if desired. Alternatively, the environment could be stored in NAND flash, but we currently have no driver for that controller. Signed-off-by: Stephen Warren <swarren@nvidia.com> Cc: Simon Glass <sjg@chromium.org> Signed-off-by: Tom Warren <twarren@nvidia.com>
Diffstat (limited to 'include/configs/paz00.h')
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