On Tue, Mar 25, 2014 at 08:19:19AM +0000, Lee Jones wrote: > This patch adds a new structure, 'nand_timing_spec', to capture the A/C > timing characteristics of NAND devices.
Boris BREZILLON <[email protected]> has been working on a similar patch for a time now, and I think has an implementation for the sunxi driver. > some of the major NAND manufacturers (e.g. Samsung, Toshiba). Here we > have followed broadly the ONFI timing definitions. Timing specifications that are not precisely defined are useless.. I would stick entirely with the well defined ONFI ones until a need arises.. > + * Note, 'tR' field (maximum page read time) is extracted from the ONFI > + * parameter page during device probe. > + */ > +struct nand_timing_spec nand_onfi_timing_specs[] = { const? > + /* > + * ONFI Timing Mode '0' (supported on all ONFI compliant devices) > + */ > + [0] = { > + .tCLS = 50, > + .tCS = 70, > + .tALS = 50, Use picoseconds, ns is already loosing precision at the higher timing modes. Cheers, Jason -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
