diff options
| author | David Jander <david@protonic.nl> | 2024-12-03 11:38:35 +0100 |
|---|---|---|
| committer | Miquel Raynal <miquel.raynal@bootlin.com> | 2024-12-05 11:28:29 +0100 |
| commit | 5dbc889d41b175aa7b9c7c49a48c11a047f6074d (patch) | |
| tree | 954e6a8c097aa492170f3bcae727ba21ffab56f3 | |
| parent | b3c782868ecebd0c1661a6aa2bdc84cd3cbb1ef3 (diff) | |
mtd: mchp48l640: make WEL behaviour configurable
The 48L640 resets the WEL bit (the Write Enable Latch bit in the status
register) to zero on the completion of write operations. In preparation
to support chips behaving differently, introduce .auto_disable_wel
capability, and, if it's missing, explicitly reset the WEL bit after
writes.
Signed-off-by: David Jander <david@protonic.nl>
Reviewed-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Jonas Rebmann <jre@pengutronix.de>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
| -rw-r--r-- | drivers/mtd/devices/mchp48l640.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/mtd/devices/mchp48l640.c b/drivers/mtd/devices/mchp48l640.c index f576e6a890e8..4cdd24aaed41 100644 --- a/drivers/mtd/devices/mchp48l640.c +++ b/drivers/mtd/devices/mchp48l640.c @@ -27,6 +27,7 @@ struct mchp48_caps { unsigned int size; unsigned int page_size; + bool auto_disable_wel; }; struct mchp48l640_flash { @@ -194,9 +195,15 @@ static int mchp48l640_write_page(struct mtd_info *mtd, loff_t to, size_t len, else goto fail; - ret = mchp48l640_waitforbit(flash, MCHP48L640_STATUS_WEL, false); - if (ret) - goto fail; + if (flash->caps->auto_disable_wel) { + ret = mchp48l640_waitforbit(flash, MCHP48L640_STATUS_WEL, false); + if (ret) + goto fail; + } else { + ret = mchp48l640_write_prepare(flash, false); + if (ret) + goto fail; + } kfree(cmd); return 0; @@ -293,6 +300,7 @@ static int mchp48l640_read(struct mtd_info *mtd, loff_t from, size_t len, static const struct mchp48_caps mchp48l640_caps = { .size = SZ_8K, .page_size = 32, + .auto_disable_wel = true, }; static int mchp48l640_probe(struct spi_device *spi) |