Re: [PATCH 13/15] mtd: nand: samsung: retrieve ECC requirements from extended ID
From: Valdis . Kletnieks
Date: Sun May 29 2016 - 20:22:00 EST
On Fri, 27 May 2016 14:54:59 +0200, Boris Brezillon said:
> From: Hans de Goede <hdegoede@xxxxxxxxxx>
> On some nand controllers with hw-ecc the controller code wants to know
> the ecc strength and size and having these as 0, 0 is not accepted.
> Specifying these in devicetree is possible but undesirable as the nand
> may be different in different production runs of the same board, so it
> is better to get this info from the nand id where possible.
> This commit adds code to read the ecc strength and size from the nand
> for Samsung extended-id nands. This code is based on the info for the 5th
> id byte in the datasheets for the following Samsung nands: K9GAG08U0E,
> K9GAG08U0F, K9GAG08X0D, K9GBG08U0A, K9GBG08U0B. These all use these bits
> in the exact same way.
Is this correct for all Samsung nand devices supported by this driver?
(If this driver only covers those 5 specific parts, it's OK. If there's
others, more research is needed....)
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