From: David Jander Date: Tue, 3 Dec 2024 10:38:35 +0000 (+0100) Subject: mtd: mchp48l640: make WEL behaviour configurable X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=5dbc889d41b175aa7b9c7c49a48c11a047f6074d;p=users%2Fdwmw2%2Flinux.git 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 Reviewed-by: Heiko Schocher Signed-off-by: Jonas Rebmann Signed-off-by: Miquel Raynal --- diff --git a/drivers/mtd/devices/mchp48l640.c b/drivers/mtd/devices/mchp48l640.c index f576e6a890e85..4cdd24aaed416 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)