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

Michael Walle
2024-02-19T08:35:51Z

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Hi,

On Sat Feb 17, 2024 at 1:20 PM CET, Christian Marangi wrote:
> From: David Bauer <mail@david-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].

Last time it wasn't clear if this flash will support SFDP or not.
Could you please try to dump the SFDP again, see [1].

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

Also per [1], you'd need to provide your test results.

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

Link: right above your SoB please.

> Signed-off-by: David Bauer <mail@david-bauer.net>
> [ reworked to new flash_info format ]
> Signed-off-by: Christian Marangi <ansuelsmth@gmail.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.

Please remove, there is nothing from the old code left here.

> + */
> +
> +#include <linux/mtd/spi-nor.h>
> +
> +#include "core.h"
> +
> +static const struct flash_info bohong_parts[] = {
> + {
> + .id = SNOR_ID(0x68, 0x40, 0x18),
> + .name = "bh25q128as",
No names anymore, please.

> + .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",

This should be dropped, too. Otherwise looks good, if SFDP is not
supported.

-michael

[1] https://docs.kernel.org/driver-api/mtd/spi-nor.html

> + .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;

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