From 5dbc889d41b175aa7b9c7c49a48c11a047f6074d Mon Sep 17 00:00:00 2001 From: David Jander Date: Tue, 3 Dec 2024 11:38:35 +0100 Subject: [PATCH] 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 --- drivers/mtd/devices/mchp48l640.c | 14 +++++++++++--- 1 file 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) -- 2.50.1