On Tue, Oct 13, 2015 at 11:22:18AM +0200, Boris Brezillon wrote: > The ->read_xxx() methods are all passed the page number the NAND controller > is supposed to read, but ->write_xxx() do not have such a parameter. > > This is a problem if we want to properly implement data > scrambling/randomization in order to mitigate MLC sensibility to repeated > pattern: to prevent bitflips in adjacent pages in the same block we need > to avoid repeating the same pattern at the same offset in those pages, > hence the randomizer/scrambler engine need to be passed the page value > in order to adapt its seed accordingly. > > Moreover, adding the page parameter to the ->write_xxx() methods add some > consistency to the current API. > > Signed-off-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxxxxxxx> > CC: Josh Wu <josh.wu@xxxxxxxxx> > CC: Ezequiel Garcia <ezequiel.garcia@xxxxxxxxxxxxxxxxxx> > CC: Maxime Ripard <maxime.ripard@xxxxxxxxxxxxxxxxxx> > CC: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> > CC: Huang Shijie <shijie.huang@xxxxxxx> > CC: Stefan Agner <stefan@xxxxxxxx> > CC: devel@xxxxxxxxxxxxxxxxxxxx > CC: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx > CC: linux-kernel@xxxxxxxxxxxxxxx > --- > Changes since v3: > - rebased on l2-mtd/master > > Changes since v2: > - fixed compilation error in the gpmi driver > - compile tested all impacted drivers except the bf5xx_nand, > fsl_elbc_nand and fsl_ifc_nand ones > > Changes since v1: > - rebased on l2-mtd/master > - fixed compilation error in the docg4 driver Applied to l2-mtd.git _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
