linux-kernel - [PATCH] mtd: spinand: add Foresee F35SQB002G flash support

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Message-ID: <20260119040237.775649-1-mikhail.kshevetskiy@iopsys.eu>
Date: Mon, 19 Jan 2026 07:02:37 +0300
From: Mikhail Kshevetskiy <mikhail.kshevetskiy@...sys.eu>
To: Miquel Raynal <miquel.raynal@...tlin.com>,
	Richard Weinberger <richard@....at>,
	Vignesh Raghavendra <vigneshr@...com>,
	Tudor Ambarus <tudor.ambarus@...aro.org>,
	linux-mtd@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Cc: Mikhail Kshevetskiy <mikhail.kshevetskiy@...sys.eu>
Subject: [PATCH] mtd: spinand: add Foresee F35SQB002G flash support

Add support of Foresee F35SQB002G spinand flash

Signed-off-by: Mikhail Kshevetskiy <mikhail.kshevetskiy@...sys.eu>
---
 drivers/mtd/nand/spi/foresee.c | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/drivers/mtd/nand/spi/foresee.c b/drivers/mtd/nand/spi/foresee.c
index c521dd6abc4b..5ff18316092c 100644
--- a/drivers/mtd/nand/spi/foresee.c
+++ b/drivers/mtd/nand/spi/foresee.c
@@ -11,6 +11,11 @@
 
 #define SPINAND_MFR_FORESEE		0xCD
 
+#define F35SQB002G_STATUS_ECC_MASK		(7 << 4)
+#define F35SQB002G_STATUS_ECC_NO_BITFLIPS	(0 << 4)
+#define F35SQB002G_STATUS_ECC_1_3_BITFLIPS	(1 << 4)
+#define F35SQB002G_STATUS_ECC_UNCOR_ERROR	(7 << 4)
+
 static SPINAND_OP_VARIANTS(read_cache_variants,
 		SPINAND_PAGE_READ_FROM_CACHE_1S_1S_4S_OP(0, 1, NULL, 0, 0),
 		SPINAND_PAGE_READ_FROM_CACHE_1S_1S_2S_OP(0, 1, NULL, 0, 0),
@@ -70,6 +75,25 @@ static int f35sqa002g_ecc_get_status(struct spinand_device *spinand, u8 status)
 	return -EBADMSG;
 }
 
+static int f35sqb002g_ecc_get_status(struct spinand_device *spinand, u8 status)
+{
+	switch (status & F35SQB002G_STATUS_ECC_MASK) {
+	case F35SQB002G_STATUS_ECC_NO_BITFLIPS:
+		return 0;
+
+	case F35SQB002G_STATUS_ECC_1_3_BITFLIPS:
+		return 3;
+
+	case F35SQB002G_STATUS_ECC_UNCOR_ERROR:
+		return -EBADMSG;
+
+	default: /* (2 << 4) through (6 << 4) are 4-8 corrected errors */
+		return ((status & F35SQB002G_STATUS_ECC_MASK) >> 4) + 2;
+	}
+
+	return -EINVAL;
+}
+
 static const struct spinand_info foresee_spinand_table[] = {
 	SPINAND_INFO("F35SQA002G",
 		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x72, 0x72),
@@ -91,6 +115,16 @@ static const struct spinand_info foresee_spinand_table[] = {
 		     SPINAND_HAS_QE_BIT,
 		     SPINAND_ECCINFO(&f35sqa002g_ooblayout,
 				     f35sqa002g_ecc_get_status)),
+	SPINAND_INFO("F35SQB002G",
+		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x52, 0x52),
+		     NAND_MEMORG(1, 2048, 128, 64, 2048, 40, 1, 1, 1),
+		     NAND_ECCREQ(8, 512),
+		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+					      &write_cache_variants,
+					      &update_cache_variants),
+		     SPINAND_HAS_QE_BIT,
+		     SPINAND_ECCINFO(&f35sqa002g_ooblayout,
+				     f35sqb002g_ecc_get_status)),
 };
 
 static const struct spinand_manufacturer_ops foresee_spinand_manuf_ops = {
-- 
2.51.0