dany/u-boot-megous
1
0
Fork 0
mirror of https://xff.cz/git/u-boot/ synced 2026-04-11 22:10:01 +02:00
Code Issues Packages Projects Releases Wiki Activity

mtd: rawnand: nand_base: Handle algorithm selection

Browse Source 
For BRCMNAND with 1-bit BCH ECC (BCH-1) such as used on the
D-Link DIR-885L and DIR-890L routers, we need to explicitly
select the ECC like this in the device tree:

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

This is handled by the Linux kernel but U-Boot core does
not respect this. Fix it up by parsing the algorithm and
preserve the behaviour using this property to select
software BCH as far as possible.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Michael Trimarchi <michael@amarulasolutions.com>
Acked-by: William Zhang <william.zhang@broadcom.com>
Link: https://lore.kernel.org/all/20230308212851.370939-1-linus.walleij@linaro.org/
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
This commit is contained in:
Linus Walleij
2023-03-08 22:28:51 +01:00
committed by Dario Binacchi
parent 28b395ccc4
commit ff33d3c87c
1 changed files with 9 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/mtd/nand/raw/nand_base.c
View File

@@ -4487,6 +4487,7 @@ EXPORT_SYMBOL(nand_detect);
static int nand_dt_init(struct mtd_info *mtd, struct nand_chip *chip, ofnode node)
{
int ret, ecc_mode = -1, ecc_strength, ecc_step;
int ecc_algo = NAND_ECC_UNKNOWN;
const char *str;
ret = ofnode_read_s32_default(node, "nand-bus-width", -1);
@@ -4512,10 +4513,13 @@ static int nand_dt_init(struct mtd_info *mtd, struct nand_chip *chip, ofnode nod
ecc_mode = NAND_ECC_SOFT_BCH;
}
if (ecc_mode == NAND_ECC_SOFT) {
str = ofnode_read_string(node, "nand-ecc-algo");
if (str && !strcmp(str, "bch"))
str = ofnode_read_string(node, "nand-ecc-algo");
if (str && !strcmp(str, "bch")) {
ecc_algo = NAND_ECC_BCH;
if (ecc_mode == NAND_ECC_SOFT)
ecc_mode = NAND_ECC_SOFT_BCH;
} else if (!strcmp(str, "hamming")) {
ecc_algo = NAND_ECC_HAMMING;
}
ecc_strength = ofnode_read_s32_default(node,
@@ -4529,6 +4533,8 @@ static int nand_dt_init(struct mtd_info *mtd, struct nand_chip *chip, ofnode nod
return -EINVAL;
}
chip->ecc.algo = ecc_algo;
if (ecc_mode >= 0)
chip->ecc.mode = ecc_mode;