diff options
| author | Sekhar Nori <nsekhar@ti.com> | 2017-03-30 20:09:30 +0530 |
|---|---|---|
| committer | Boris Brezillon <boris.brezillon@free-electrons.com> | 2017-04-25 14:18:41 +0200 |
| commit | 65a2c1caa70f71690dcb5afd8fc6afe67fcde599 (patch) | |
| tree | 7bbd3bbdbb6a6bd22063fcd3aa6514f4ba7ddb8f /drivers | |
| parent | 2d283ede59869159f4bb84ae689258c5caffce54 (diff) | |
mtd: nand: davinci: add comment on NAND subpage write status on keystone
Add a comment clarifying that NAND subpage write on keystone works,
but is not being enabled in the interest of backward compatibility.
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mtd/nand/davinci_nand.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/mtd/nand/davinci_nand.c b/drivers/mtd/nand/davinci_nand.c index 27fa8b87cd5f..531c51991e57 100644 --- a/drivers/mtd/nand/davinci_nand.c +++ b/drivers/mtd/nand/davinci_nand.c @@ -581,6 +581,17 @@ static struct davinci_nand_pdata "ti,davinci-nand-use-bbt")) pdata->bbt_options = NAND_BBT_USE_FLASH; + /* + * Since kernel v4.8, this driver has been fixed to enable + * use of 4-bit hardware ECC with subpages and verified on + * TI's keystone EVMs (K2L, K2HK and K2E). + * However, in the interest of not breaking systems using + * existing UBI partitions, sub-page writes are not being + * (re)enabled. If you want to use subpage writes on Keystone + * platforms (i.e. do not have any existing UBI partitions), + * then use "ti,davinci-nand" as the compatible in your + * device-tree file. + */ if (of_device_is_compatible(pdev->dev.of_node, "ti,keystone-nand")) { pdata->options |= NAND_NO_SUBPAGE_WRITE; |