mtd: brcmnand: respect ECC algorithm set by NAND subsystem

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This is more obvious than guessing based on ECC strength. It allows
using NAND on devices with BCH-1 (e.g. D-Link DIR-885L).

This maintains DT backward compatibility by defaulting to Hamming if a
1-bit ECC algorithm is specified without a corresponding algorithm
selection. i.e., to use BCH-1, you must specify:

  nand-ecc-strength = <1>;
  nand-ecc-step-size = <512>;
  nand-ecc-algo = "bch";

Also adds a check to ensure we haven't allowed someone to get by with SW
ECC. If we want to support SW ECC, we need to refactor some other pieces
of this driver.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Tested-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>

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Brian Norris 2016-04-25 22:53:55 -07:00 • committed by Boris Brezillon

parent bd2e778c9e

commit 666b65683d

1 changed files with 23 additions and 1 deletions

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drivers/mtd/nand/brcmnand/brcmnand.c

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