Hi On Tue, 9 Aug 2011, Mohammed, Afzal wrote:
> This is regarding board with multiple variations using an upcoming SoC from > TI. > Variation of the board is detected by reading EEPROM using I2C after > init_machine gets invoked. In one of the variation UART# used is different. > Because of this decompressor logs (and early prints) can't be captured for the > board variant using this different UART#. Our solution for this problem is to > use different mach-id for the board using different UART#. But this solution > seems to be overkill as only to capture decompressor logs, we have to use > a new machine id. > > As I2C will not work at the decompressor stage, I2C can't be used to detect > the board type. > > As far as I know, ATAG is not parsed in decompressor stage and so ATAG cannot > be used to determine board variant or UART#. Otherwise we will have to add > capability in decompressor to parse ATAG, detect console to be used, and > modify uncompress.h to select proper console for capturing decompressor logs. > This seems a bad solution. > > Our bootloader has the capability to detect the board variant. > > So the best solution for us so far seems to add a new machine id, if any > better solutions are possible, please let us know. You might get more feedback if you E-mail <linux-arm-ker...@lists.infradead.org>, rather than <linux-arm-kernel-boun...@lists.infradead.org>. - Paul -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
