From 8e7daa85641c9559c113f6b217bdc923397de77c Mon Sep 17 00:00:00 2001
From: William Zhang <william.zhang@broadcom.com>
Date: Thu, 22 Feb 2024 19:47:58 -0800
Subject: [PATCH] mtd: rawnand: brcmnand: Support write protection setting from
 dts

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
---
 drivers/mtd/nand/raw/brcmnand/brcmnand.c | 4 ++++
 1 file changed, 4 insertions(+)

--- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c
+++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c
@@ -3184,6 +3184,10 @@ int brcmnand_probe(struct platform_devic
 	/* 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)
