linux-kernel - [PATCH] mtd: spi-nor: Add support for BoHong bh25q128as

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Date: Sat, 17 Feb 2024 13:20:22 +0100
From: Christian Marangi <ansuelsmth@...il.com>
To: Tudor Ambarus <tudor.ambarus@...aro.org>,
	Pratyush Yadav <pratyush@...nel.org>,
	Michael Walle <mwalle@...nel.org>,
	Miquel Raynal <miquel.raynal@...tlin.com>,
	Richard Weinberger <richard@....at>,
	Vignesh Raghavendra <vigneshr@...com>,
	linux-kernel@...r.kernel.org,
	linux-mtd@...ts.infradead.org
Cc: David Bauer <mail@...id-bauer.net>,
	Christian Marangi <ansuelsmth@...il.com>
Subject: [PATCH] mtd: spi-nor: Add support for BoHong bh25q128as

From: David Bauer <mail@...id-bauer.net>

Add MTD support for the BoHong bh25q128as SPI NOR chip.
The chip has 16MB of total capacity, divided into a total of 256
sectors, each 64KB sized. The chip also supports 4KB sectors.
Additionally, it supports dual and quad read modes.

Datasheet is public and can be found here [1].

Functionality was verified on an Tenbay WR1800K / MTK MT7621 board.

[1] https://www.e-interlink.com.tw/userUpload/files/BH25Q128AS_v1_0.pdf

Signed-off-by: David Bauer <mail@...id-bauer.net>
[ reworked to new flash_info format ]
Signed-off-by: Christian Marangi <ansuelsmth@...il.com>
---
 drivers/mtd/spi-nor/Makefile |  1 +
 drivers/mtd/spi-nor/bohong.c | 24 ++++++++++++++++++++++++
 drivers/mtd/spi-nor/core.c   |  1 +
 drivers/mtd/spi-nor/core.h   |  1 +
 4 files changed, 27 insertions(+)
 create mode 100644 drivers/mtd/spi-nor/bohong.c

diff --git a/drivers/mtd/spi-nor/Makefile b/drivers/mtd/spi-nor/Makefile
index 5e68468b72fc..c8849cf5124f 100644
--- a/drivers/mtd/spi-nor/Makefile
+++ b/drivers/mtd/spi-nor/Makefile
@@ -2,6 +2,7 @@
 
 spi-nor-objs			:= core.o sfdp.o swp.o otp.o sysfs.o
 spi-nor-objs			+= atmel.o
+spi-nor-objs			+= bohong.o
 spi-nor-objs			+= eon.o
 spi-nor-objs			+= esmt.o
 spi-nor-objs			+= everspin.o
diff --git a/drivers/mtd/spi-nor/bohong.c b/drivers/mtd/spi-nor/bohong.c
new file mode 100644
index 000000000000..26988c139262
--- /dev/null
+++ b/drivers/mtd/spi-nor/bohong.c
@@ -0,0 +1,24 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2005, Intec Automation Inc.
+ * Copyright (C) 2014, Freescale Semiconductor, Inc.
+ */
+
+#include <linux/mtd/spi-nor.h>
+
+#include "core.h"
+
+static const struct flash_info bohong_parts[] = {
+	{
+		.id = SNOR_ID(0x68, 0x40, 0x18),
+		.name = "bh25q128as",
+		.size = SZ_16M,
+		.no_sfdp_flags = SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ,
+	},
+};
+
+const struct spi_nor_manufacturer spi_nor_bohong = {
+	.name = "bohong",
+	.parts = bohong_parts,
+	.nparts = ARRAY_SIZE(bohong_parts),
+};
diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
index 4129764fad8c..29c28ee683a1 100644
--- a/drivers/mtd/spi-nor/core.c
+++ b/drivers/mtd/spi-nor/core.c
@@ -2037,6 +2037,7 @@ int spi_nor_sr2_bit7_quad_enable(struct spi_nor *nor)
 
 static const struct spi_nor_manufacturer *manufacturers[] = {
 	&spi_nor_atmel,
+	&spi_nor_bohong,
 	&spi_nor_eon,
 	&spi_nor_esmt,
 	&spi_nor_everspin,
diff --git a/drivers/mtd/spi-nor/core.h b/drivers/mtd/spi-nor/core.h
index d36c0e072954..c293568ae827 100644
--- a/drivers/mtd/spi-nor/core.h
+++ b/drivers/mtd/spi-nor/core.h
@@ -601,6 +601,7 @@ struct sfdp {
 
 /* Manufacturer drivers. */
 extern const struct spi_nor_manufacturer spi_nor_atmel;
+extern const struct spi_nor_manufacturer spi_nor_bohong;
 extern const struct spi_nor_manufacturer spi_nor_eon;
 extern const struct spi_nor_manufacturer spi_nor_esmt;
 extern const struct spi_nor_manufacturer spi_nor_everspin;
-- 
2.43.0