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: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>

1 files changed, 15 insertions, 2 deletions

diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c
index 3b66a6460d67..2a9add06c2d5 100644
--- a/drivers/mtd/nand/pxa3xx_nand.c
+++ b/drivers/mtd/nand/pxa3xx_nand.c
@@ -1519,8 +1519,13 @@ KEEP_CONFIG:
                 }
         }
 
-        ecc_strength = chip->ecc_strength_ds;
-        ecc_step = chip->ecc_step_ds;
+        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;