[PATCH] mtd: rawnand: Add Macronix NAND read retry and randomizer support
boris.brezillon at collabora.com
Tue Apr 9 02:47:01 PDT 2019
On Tue, 9 Apr 2019 17:35:39 +0800
masonccyang at mxic.com.tw wrote:
> > > +
> > > +static const struct kobj_attribute sysfs_mxic_nand =
> > > + __ATTR(nand_random, S_IRUGO | S_IWUSR,
> > > + mxic_nand_rand_type_show,
> > > + mxic_nand_rand_type_store);
> > No, we don't want to expose that through a sysfs file, especially since
> > changing the randomizer config means making the NAND unreadable for
> > those that have used it before the change.
> Our on-die randomizer is still readable from user after the function
> is enabled.
You mean the memory is still readable no matter the randomizer state.
Not sure how that's possible, but okay.
> This randomizer is just like a internal memory cell
> reliability enhanced.
Why don't you enable it by default then?
> It could be enable at any time with OTP bit function and that's why
> we patch it by sys-fs.
Sorry, but that's not a good reason to expose that through sysfs.
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