Re: [PATCH RFC 2/3] mtd: rawnand: Add support Macronix Block Protection function

[masonccyang@xxxxxxxxxxx]

Hi Miquel,

> > 
> > > Macronix AC series support using SET/GET_FEATURES to change
> > > Block Protection and Unprotection.
> > > 
> > > MTD default _lock/_unlock function replacement by manufacturer
> > > postponed initialization. 
> > 
> > Why would we do that?
> > 
> > Anyway your solution looks overkill, if we ever decide to
> > implement these hooks for raw nand, it is better just to not
> > overwrite them in nand_scan_tail() if they have been filled
> > previously (ie. by the manufacturer code).
> 
> Actually you should add two NAND hooks that do the interface with the
> MTD hooks. In the NAND hooks, check that the request is to lock all the
> device, otherwise return -ENOTSUPP.

sorry, can't get your point.

Because the NAND entire chip will be protected if PT(protection) pin 
is active high at power-on.

> 
> Then fill-in these two hooks from the manufacturer code, without the
> postponed init.
> 

But in the final of nand_scan_tail(), mtd->_lock/_unlock will be
filled by NULL, right ?

thanks & best regards,
Mason

CONFIDENTIALITY NOTE:

This e-mail and any attachments may contain confidential information 
and/or personal data, which is protected by applicable laws. Please be 
reminded that duplication, disclosure, distribution, or use of this e-mail 
(and/or its attachments) or any part thereof is prohibited. If you receive 
this e-mail in error, please notify us immediately and delete this mail as 
well as its attachment(s) from your system. In addition, please be 
informed that collection, processing, and/or use of personal data is 
prohibited unless expressly permitted by personal data protection laws. 
Thank you for your attention and cooperation.

Macronix International Co., Ltd.

=====================================================================



============================================================================

CONFIDENTIALITY NOTE:

This e-mail and any attachments may contain confidential information and/or personal data, which is protected by applicable laws. Please be reminded that duplication, disclosure, distribution, or use of this e-mail (and/or its attachments) or any part thereof is prohibited. If you receive this e-mail in error, please notify us immediately and delete this mail as well as its attachment(s) from your system. In addition, please be informed that collection, processing, and/or use of personal data is prohibited unless expressly permitted by personal data protection laws. Thank you for your attention and cooperation.

Macronix International Co., Ltd.

=====================================================================


______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/