linux-kernel - [PATCH 2/2] mtd: nand: raw: macronix: allow disabling block protection

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Message-Id: <20230323124510.2484808-3-noltari@gmail.com>
Date:   Thu, 23 Mar 2023 13:45:10 +0100
From:   Álvaro Fernández Rojas 
        <noltari@...il.com>
To:     miquel.raynal@...tlin.com, richard@....at, vigneshr@...com,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        masonccyang@...c.com.tw, linux-mtd@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Álvaro Fernández Rojas 
        <noltari@...il.com>
Subject: [PATCH 2/2] mtd: nand: raw: macronix: allow disabling block protection

Some devices hang when block protection is enabled, so let's add a boolean
property to allow disabling it.

Fixes: 03a539c7a118 ("mtd: rawnand: Macronix: Add support for block protection")
Signed-off-by: Álvaro Fernández Rojas <noltari@...il.com>
---
 drivers/mtd/nand/raw/nand_macronix.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/mtd/nand/raw/nand_macronix.c b/drivers/mtd/nand/raw/nand_macronix.c
index 1472f925f386..b9f0338ebdaf 100644
--- a/drivers/mtd/nand/raw/nand_macronix.c
+++ b/drivers/mtd/nand/raw/nand_macronix.c
@@ -219,9 +219,13 @@ static int mxic_nand_unlock(struct nand_chip *chip, loff_t ofs, uint64_t len)
 
 static void macronix_nand_block_protection_support(struct nand_chip *chip)
 {
+	struct device_node *dn = nand_get_flash_node(chip);
 	u8 feature[ONFI_SUBFEATURE_PARAM_LEN];
 	int ret;
 
+	if (of_property_read_bool(dn, "mxic,disable-block-protection"))
+		return;
+
 	bitmap_set(chip->parameters.get_feature_list,
 		   ONFI_FEATURE_ADDR_MXIC_PROTECTION, 1);
 
-- 
2.30.2