Hi Dave, On Wed, Aug 12, 2015 at 12:21:00PM +0100, Dave Kitchen wrote: > > I have just started to work with barebox on an Atmel at91sam9g45 processor. > The board has an Atmel AT45DB161 dataflash configured as 528-byte page size. > I find that eg saveenv command does not run as the page erase fails > with EINVAL. On tracing this is fired from the page size and offset > correction code [mtd/core,c mtd_erase_align()] which uses bit > masking to align the size and offset. Unfortunately bit-masking does > not work with non-power-of-2 pages. Has anyone else addressed this > problem? > > The 'trivial' exercise of replacing the bit masks by modulo [%] > operator does not succeed as the compiler I am using (gcc!) does not > support long-long divmod. You could use do_div here which returns the remainder. Also see the mtd_div_by_eb() and mtd_mod_by_eb() functions which may be what you are looking for. Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
