From 8e7daa85641c9559c113f6b217bdc923397de77c Mon Sep 17 00:00:00 2001 From: William Zhang 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 Reviewed-by: Florian Fainelli Reviewed-by: Kamal Dasu Reviewed-by: David Regan Signed-off-by: Miquel Raynal 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)