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Commit 5b3e5078 authored by Ezequiel Garcia's avatar Ezequiel Garcia Committed by Brian Norris
Browse files

mtd: nand: pxa3xx: Use ECC strength and step size devicetree binding 



This commit adds support for the user to specify the ECC strength
and step size through the devicetree. We keep the previous behavior,
when there is no DT parameter provided.

Signed-off-by: default avatarEzequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: default avatarBrian Norris <computersforpeace@gmail.com>
parent eee0166d

drivers/mtd/nand/pxa3xx_nand.c

+15 −2
Original line number Diff line number Diff line
@@ -1519,8 +1519,13 @@ KEEP_CONFIG: 
		}

	}



	if (pdata->ecc_strength && pdata->ecc_step_size) {

		ecc_strength = pdata->ecc_strength;

		ecc_step = pdata->ecc_step_size;

	} else {

		ecc_strength = chip->ecc_strength_ds;

		ecc_step = chip->ecc_step_ds;

	}



	/* Set default ECC strength requirements on non-ONFI devices */

	if (ecc_strength < 1 && ecc_step < 1) {
@@ -1729,6 +1734,14 @@ static int pxa3xx_nand_probe_dt(struct platform_device *pdev) 
	of_property_read_u32(np, "num-cs", &pdata->num_cs);

	pdata->flash_bbt = of_get_nand_on_flash_bbt(np);



	pdata->ecc_strength = of_get_nand_ecc_strength(np);

	if (pdata->ecc_strength < 0)

		pdata->ecc_strength = 0;



	pdata->ecc_step_size = of_get_nand_ecc_step_size(np);

	if (pdata->ecc_step_size < 0)

		pdata->ecc_step_size = 0;



	pdev->dev.platform_data = pdata;



	return 0;

include/linux/platform_data/mtd-nand-pxa3xx.h

+3 −0
Original line number Diff line number Diff line
@@ -58,6 +58,9 @@ struct pxa3xx_nand_platform_data { 
	/* use an flash-based bad block table */

	bool	flash_bbt;



	/* requested ECC strength and ECC step size */

	int ecc_strength, ecc_step_size;



	const struct mtd_partition		*parts[NUM_CHIP_SELECT];

	unsigned int				nr_parts[NUM_CHIP_SELECT];