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

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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: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
This commit is contained in:
Ezequiel Garcia 2014-05-14 14:58:08 -03:00 committed by Brian Norris
parent eee0166d8e
commit 5b3e507820
2 changed files with 18 additions and 2 deletions
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17
drivers/mtd/nand/pxa3xx_nand.c
View File

@ -1519,8 +1519,13 @@ KEEP_CONFIG:
} }
} }
ecc_strength = chip->ecc_strength_ds; if (pdata->ecc_strength && pdata->ecc_step_size) {
ecc_step = chip->ecc_step_ds; 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 */ /* Set default ECC strength requirements on non-ONFI devices */
if (ecc_strength < 1 && ecc_step < 1) { 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); of_property_read_u32(np, "num-cs", &pdata->num_cs);
pdata->flash_bbt = of_get_nand_on_flash_bbt(np); 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; pdev->dev.platform_data = pdata;
return 0; return 0;

3
include/linux/platform_data/mtd-nand-pxa3xx.h
View File

@ -58,6 +58,9 @@ struct pxa3xx_nand_platform_data {
/* use an flash-based bad block table */ /* use an flash-based bad block table */
bool flash_bbt; bool flash_bbt;
/* requested ECC strength and ECC step size */
int ecc_strength, ecc_step_size;
const struct mtd_partition *parts[NUM_CHIP_SELECT]; const struct mtd_partition *parts[NUM_CHIP_SELECT];
unsigned int nr_parts[NUM_CHIP_SELECT]; unsigned int nr_parts[NUM_CHIP_SELECT];