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Date:   Tue, 29 Dec 2020 14:50:59 +0900
From:   Daniel Palmer <daniel@...f.com>
To:     linux-mtd@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org, miquel.raynal@...tlin.com,
        richard@....at, vigneshr@...com, Daniel Palmer <daniel@...f.com>
Subject: [PATCH 1/1] mtd: spinand: add support for Foresee FS35ND01G

Add support for the Foresee FS35ND01G manufactured by Longsys.

Signed-off-by: Daniel Palmer <daniel@...f.com>
---
 drivers/mtd/nand/spi/Makefile  |  2 +-
 drivers/mtd/nand/spi/core.c    |  1 +
 drivers/mtd/nand/spi/longsys.c | 45 ++++++++++++++++++++++++++++++++++
 include/linux/mtd/spinand.h    |  1 +
 4 files changed, 48 insertions(+), 1 deletion(-)
 create mode 100644 drivers/mtd/nand/spi/longsys.c

diff --git a/drivers/mtd/nand/spi/Makefile b/drivers/mtd/nand/spi/Makefile
index 9662b9c1d5a9..1d6819022e43 100644
--- a/drivers/mtd/nand/spi/Makefile
+++ b/drivers/mtd/nand/spi/Makefile
@@ -1,3 +1,3 @@
 # SPDX-License-Identifier: GPL-2.0
-spinand-objs := core.o gigadevice.o macronix.o micron.o paragon.o toshiba.o winbond.o
+spinand-objs := core.o gigadevice.o longsys.o macronix.o micron.o paragon.o toshiba.o winbond.o
 obj-$(CONFIG_MTD_SPI_NAND) += spinand.o
diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c
index 8ea545bb924d..bdc9cd45d232 100644
--- a/drivers/mtd/nand/spi/core.c
+++ b/drivers/mtd/nand/spi/core.c
@@ -856,6 +856,7 @@ static const struct nand_ops spinand_ops = {
 
 static const struct spinand_manufacturer *spinand_manufacturers[] = {
 	&gigadevice_spinand_manufacturer,
+	&longsys_spinand_manufacturer,
 	&macronix_spinand_manufacturer,
 	&micron_spinand_manufacturer,
 	&paragon_spinand_manufacturer,
diff --git a/drivers/mtd/nand/spi/longsys.c b/drivers/mtd/nand/spi/longsys.c
new file mode 100644
index 000000000000..f18271f8e9d2
--- /dev/null
+++ b/drivers/mtd/nand/spi/longsys.c
@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2020 Daniel Palmer <daniel@...ngy.jp>
+ *
+ */
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/mtd/spinand.h>
+
+#define SPINAND_MFR_LONGSYS		0xcd
+
+static SPINAND_OP_VARIANTS(read_cache_variants,
+		SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
+		SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
+
+static SPINAND_OP_VARIANTS(write_cache_variants,
+		SPINAND_PROG_LOAD(true, 0, NULL, 0));
+
+static SPINAND_OP_VARIANTS(update_cache_variants,
+		SPINAND_PROG_LOAD(false, 0, NULL, 0));
+
+static const struct spinand_info longsys_spinand_table[] = {
+	SPINAND_INFO("FS35ND01G",
+		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xea, 0x11),
+		     NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1),
+		     NAND_ECCREQ(4, 512),
+		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+					      &write_cache_variants,
+					      &update_cache_variants),
+		     SPINAND_HAS_QE_BIT,
+		     SPINAND_ECCINFO(NULL,
+				     NULL)),
+};
+
+static const struct spinand_manufacturer_ops longsys_spinand_manuf_ops = {
+};
+
+const struct spinand_manufacturer longsys_spinand_manufacturer = {
+	.id = SPINAND_MFR_LONGSYS,
+	.name = "Longsys",
+	.chips = longsys_spinand_table,
+	.nchips = ARRAY_SIZE(longsys_spinand_table),
+	.ops = &longsys_spinand_manuf_ops,
+};
diff --git a/include/linux/mtd/spinand.h b/include/linux/mtd/spinand.h
index 6bb92f26833e..8651e63a2f8a 100644
--- a/include/linux/mtd/spinand.h
+++ b/include/linux/mtd/spinand.h
@@ -239,6 +239,7 @@ struct spinand_manufacturer {
 
 /* SPI NAND manufacturers */
 extern const struct spinand_manufacturer gigadevice_spinand_manufacturer;
+extern const struct spinand_manufacturer longsys_spinand_manufacturer;
 extern const struct spinand_manufacturer macronix_spinand_manufacturer;
 extern const struct spinand_manufacturer micron_spinand_manufacturer;
 extern const struct spinand_manufacturer paragon_spinand_manufacturer;
-- 
2.30.0.rc2

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