From 1f65976b55865adf84340d6e07c4c773cb8a728b Mon Sep 17 00:00:00 2001 From: Miquel Raynal Date: Fri, 13 Nov 2020 13:34:19 +0100 Subject: [PATCH] mtd: rawnand: tmio: Move the ECC initialization to ->attach_chip() The probe function is only supposed to initialize the controller hardware but not the ECC engine. Indeed, we don't know anything about the NAND chip(s) at this stage. Let's move the logic initializing the ECC engine, even pretty simple, to the ->attach_chip() hook which gets called during nand_scan() routine, after the NAND chip discovery. As the previously mentioned logic is supposed to parse the DT for us, it is likely that the chip->ecc.* entries be overwritten. So let's avoid this by moving these lines to ->attach_chip(). Fixes: d7157ff49a5b ("mtd: rawnand: Use the ECC framework user input parsing bits") Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20201113123424.32233-15-miquel.raynal@bootlin.com --- drivers/mtd/nand/raw/tmio_nand.c | 33 ++++++++++++++++++++++++--------- 1 file changed, 24 insertions(+), 9 deletions(-) diff --git a/drivers/mtd/nand/raw/tmio_nand.c b/drivers/mtd/nand/raw/tmio_nand.c index 235a2f7..aa6c7e7 100644 --- a/drivers/mtd/nand/raw/tmio_nand.c +++ b/drivers/mtd/nand/raw/tmio_nand.c @@ -103,6 +103,7 @@ /*--------------------------------------------------------------------------*/ struct tmio_nand { + struct nand_controller controller; struct nand_chip chip; struct completion comp; @@ -355,6 +356,25 @@ static void tmio_hw_stop(struct platform_device *dev, struct tmio_nand *tmio) cell->disable(dev); } +static int tmio_attach_chip(struct nand_chip *chip) +{ + if (chip->ecc.engine_type != NAND_ECC_ENGINE_TYPE_ON_HOST) + return 0; + + chip->ecc.size = 512; + chip->ecc.bytes = 6; + chip->ecc.strength = 2; + chip->ecc.hwctl = tmio_nand_enable_hwecc; + chip->ecc.calculate = tmio_nand_calculate_ecc; + chip->ecc.correct = tmio_nand_correct_data; + + return 0; +} + +static const struct nand_controller_ops tmio_ops = { + .attach_chip = tmio_attach_chip, +}; + static int tmio_probe(struct platform_device *dev) { struct tmio_nand_data *data = dev_get_platdata(&dev->dev); @@ -385,6 +405,10 @@ static int tmio_probe(struct platform_device *dev) mtd->name = "tmio-nand"; mtd->dev.parent = &dev->dev; + nand_controller_init(&tmio->controller); + tmio->controller.ops = &tmio_ops; + nand_chip->controller = &tmio->controller; + tmio->ccr = devm_ioremap(&dev->dev, ccr->start, resource_size(ccr)); if (!tmio->ccr) return -EIO; @@ -409,15 +433,6 @@ static int tmio_probe(struct platform_device *dev) nand_chip->legacy.write_buf = tmio_nand_write_buf; nand_chip->legacy.read_buf = tmio_nand_read_buf; - /* set eccmode using hardware ECC */ - nand_chip->ecc.engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST; - nand_chip->ecc.size = 512; - nand_chip->ecc.bytes = 6; - nand_chip->ecc.strength = 2; - nand_chip->ecc.hwctl = tmio_nand_enable_hwecc; - nand_chip->ecc.calculate = tmio_nand_calculate_ecc; - nand_chip->ecc.correct = tmio_nand_correct_data; - if (data) nand_chip->badblock_pattern = data->badblock_pattern; -- 2.7.4