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mtd: rawnand: brcmnand: Support write protection setting from dts

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The write protection feature is controlled by the module parameter wp_on
with default set to enabled. But not all the board use this feature
especially in BCMBCA broadband board. And module parameter is not
sufficient as different board can have different option.  Add a device
tree property and allow this feature to be configured through the board
dts on per board basis.

Signed-off-by: William Zhang <william.zhang@broadcom.com>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Reviewed-by: Kamal Dasu <kamal.dasu@broadcom.com>
Reviewed-by: David Regan <dregan@broadcom.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20240223034758.13753-14-william.zhang@broadcom.com
This commit is contained in:
William Zhang 2024-02-22 19:47:58 -08:00 committed by Miquel Raynal
parent 546e425991
commit 8e7daa8564
1 changed files with 4 additions and 0 deletions
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4
drivers/mtd/nand/raw/brcmnand/brcmnand.c
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@ -3152,6 +3152,10 @@ int brcmnand_probe(struct platform_device *pdev, struct brcmnand_soc *soc)
/* Disable XOR addressing */
brcmnand_rmw_reg(ctrl, BRCMNAND_CS_XOR, 0xff, 0, 0);
/* Check if the board connects the WP pin */
if (of_property_read_bool(dn, "brcm,wp-not-connected"))
wp_on = 0;
if (ctrl->features & BRCMNAND_HAS_WP) {
/* Permanently disable write protection */
if (wp_on == 2)