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mtd: nand: atmel: Fix DT backward compatibility in pmecc.c

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PMECC caps extraction from old DT bindings is broken, thus leading to
erroneous EL registers offset, which in turn make HW ECC unusable on
sama5d2 when old bindings are in use.

Passing the NAND dev node instead of the NFC node to of_match_node()
solves the problem.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Fixes: f88fc122cc ("mtd: nand: Cleanup/rework the atmel_nand driver")
Cc: <stable@vger.kernel.org>
Tested-by: Romain Izard <romain.izard.pro@gmail.com>
This commit is contained in:
Boris Brezillon 2017-07-17 20:20:08 +02:00
parent 5771a8c088
commit 3aa0907675
1 changed files with 6 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
drivers/mtd/nand/atmel/pmecc.c
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@ -945,6 +945,7 @@ struct atmel_pmecc *devm_atmel_pmecc_get(struct device *userdev)
*/ */
struct platform_device *pdev = to_platform_device(userdev); struct platform_device *pdev = to_platform_device(userdev);
const struct atmel_pmecc_caps *caps; const struct atmel_pmecc_caps *caps;
const struct of_device_id *match;
/* No PMECC engine available. */ /* No PMECC engine available. */
if (!of_property_read_bool(userdev->of_node, if (!of_property_read_bool(userdev->of_node,
@ -953,21 +954,11 @@ struct atmel_pmecc *devm_atmel_pmecc_get(struct device *userdev)
caps = &at91sam9g45_caps; caps = &at91sam9g45_caps;
/* /* Find the caps associated to the NAND dev node. */
* Try to find the NFC subnode and extract the associated caps match = of_match_node(atmel_pmecc_legacy_match,
* from there. userdev->of_node);
*/ if (match && match->data)
np = of_find_compatible_node(userdev->of_node, NULL, caps = match->data;
"atmel,sama5d3-nfc");
if (np) {
const struct of_device_id *match;
match = of_match_node(atmel_pmecc_legacy_match, np);
if (match && match->data)
caps = match->data;
of_node_put(np);
}
pmecc = atmel_pmecc_create(pdev, caps, 1, 2); pmecc = atmel_pmecc_create(pdev, caps, 1, 2);
} }