From 78933218f5c658195124456904cc56e5b52988bd Mon Sep 17 00:00:00 2001 From: Kamal Dasu Date: Tue, 21 May 2019 10:44:22 -0400 Subject: mtd: rawnand: brcmnand: fallback to detected ecc-strength, ecc-step-size This change supports nand-ecc-step-size and nand-ecc-strength fields in brcmnand DT node to be optional. see: Documentation/devicetree/bindings/mtd/brcm,brcmnand.txt If both nand-ecc-strength and nand-ecc-step-size are not specified in device tree node for NAND, raw NAND layer does detect ECC information by reading ONFI extended parameter page for parts using ONFI >= 2.1. In case of non-ONFI NAND parts there could be a nand_id table entry with ECC information. If there is valid device tree entry for nand-ecc-strength and nand-ecc-step-size fields it still shall override the detected values. Signed-off-by: Kamal Dasu Signed-off-by: Miquel Raynal --- drivers/mtd/nand/raw/brcmnand/brcmnand.c | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'drivers/mtd') diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c b/drivers/mtd/nand/raw/brcmnand/brcmnand.c index f368d1cb89f4..93ac1b5b8862 100644 --- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c +++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c @@ -2136,6 +2136,17 @@ static int brcmnand_setup_dev(struct brcmnand_host *host) return -EINVAL; } + if (chip->ecc.mode != NAND_ECC_NONE && + (!chip->ecc.size || !chip->ecc.strength)) { + if (chip->base.eccreq.step_size && chip->base.eccreq.strength) { + /* use detected ECC parameters */ + chip->ecc.size = chip->base.eccreq.step_size; + chip->ecc.strength = chip->base.eccreq.strength; + dev_info(ctrl->dev, "Using ECC step-size %d, strength %d\n", + chip->ecc.size, chip->ecc.strength); + } + } + switch (chip->ecc.size) { case 512: if (chip->ecc.algo == NAND_ECC_HAMMING) -- cgit v1.2.3-55-g7522