Commit 5dbc889d authored by David Jander's avatar David Jander Committed by Miquel Raynal
Browse files

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: default avatarDavid Jander <david@protonic.nl>
Reviewed-by: default avatarHeiko Schocher <hs@denx.de>
Signed-off-by: default avatarJonas Rebmann <jre@pengutronix.de>
Signed-off-by: default avatarMiquel Raynal <miquel.raynal@bootlin.com>
parent b3c78286

drivers/mtd/devices/mchp48l640.c

+11 −3
Original line number Diff line number Diff line
@@ -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;



	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)