Re: [PATCH v3 2/3] mtd: spi-nor: macronix: add support for Macronix octaflash series

[Pratyush Yadav <p.yadav@ti.com>]

Hi,

On 20/04/21 02:29PM, Zhengxun Li wrote:
> Add 1.8V and 3V Octal NOR Flash IDs.
> MX25 series : Serial NOR Flash.
> MX66 series : Serial NOR Flash with stacked die.

I only looked briefly at the datasheet, but I don't see any mention of 
stacked dies. I assume the stacked die part is transparent from software 
point of view, and is only a hardware implementation detail. Correct?

> LM/UM series : Up to 250MHz clock frequency with both DTR/STR operation.
> LW/UW series : Support simultaneous Read-while-Write operation in multiple
> 	       bank architecture. Read-while-write feature which means read
> 	       data one bank while another bank is programing or erasing.

AFAIK, this feature is not currently supported in SPI NOR.

> 
> MX25LM : 3.0V Octal I/O
>  -https://www.mxic.com.tw/Lists/Datasheet/Attachments/7841/MX25LM51245G,%203V,%20512Mb,%20v1.1.pdf
> 
> MX25UM : 1.8V Octal I/O
>  -https://www.mxic.com.tw/Lists/Datasheet/Attachments/7525/MX25UM51245G%20Extreme%20Speed,%201.8V,%20512Mb,%20v1.0.pdf
> 
> MX66LM : 3.0V Octal I/O with stacked die
>  -https://www.mxic.com.tw/Lists/Datasheet/Attachments/7929/MX66LM1G45G,%203V,%201Gb,%20v1.1.pdf
> 
> MX66UM : 1.8V Octal I/O with stacked die
>  -https://www.mxic.com.tw/Lists/Datasheet/Attachments/7721/MX66UM1G45G,%201.8V,%201Gb,%20v1.1.pdf
> 
> MX25LW : 3.0V Octal I/O with Read-while-Write
> MX25UW : 1.8V Octal I/O with Read-while-Write
> MX66LW : 3.0V Octal I/O with Read-while-Write and stack die
> MX66UW : 1.8V Octal I/O with Read-while-Write and stack die
> 
> About LW/UW series, please contact us freely if you have any
> questions. For adding Octal NOR Flash IDs, we have validated
> each Flash on plateform zynq-picozed.
> 
> Signed-off-by: Zhengxun Li <zhengxunli@mxic.com.tw>
> ---
>  drivers/mtd/spi-nor/macronix.c | 100 +++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 100 insertions(+)
> 
> diff --git a/drivers/mtd/spi-nor/macronix.c b/drivers/mtd/spi-nor/macronix.c
> index 881eaf8..8c1cf1b 100644
> --- a/drivers/mtd/spi-nor/macronix.c
> +++ b/drivers/mtd/spi-nor/macronix.c
> @@ -203,6 +203,106 @@ static void octaflash_post_sfdp_fixup(struct spi_nor *nor)
>  	{ "mx66u2g45g",	 INFO(0xc2253c, 0, 64 * 1024, 4096,
>  			      SECT_4K | SPI_NOR_DUAL_READ |
>  			      SPI_NOR_QUAD_READ | SPI_NOR_4B_OPCODES) },
> +	{ "mx66lm2g45g", INFO(0xc2853c, 0, 64 * 1024, 4096,
> +			      SECT_4K | SPI_NOR_OCTAL_DTR_READ |
> +			      SPI_NOR_OCTAL_DTR_PP | SPI_NOR_4B_OPCODES)
> +		.fixups = &octaflash_fixups },
> +	{ "mx66lm1g45g", INFO(0xc2853b, 0, 32 * 1024, 4096,
> +			      SECT_4K | SPI_NOR_OCTAL_DTR_READ |
> +			      SPI_NOR_OCTAL_DTR_PP | SPI_NOR_4B_OPCODES)
> +		.fixups = &octaflash_fixups },
> +	{ "mx66lw1g45g", INFO(0xc2863b, 0, 32 * 1024, 4096,
> +			      SECT_4K | SPI_NOR_OCTAL_DTR_READ |
> +			      SPI_NOR_OCTAL_DTR_PP | SPI_NOR_4B_OPCODES)
> +		.fixups = &octaflash_fixups },
> +	{ "mx25lm51245g", INFO(0xc2853a, 0, 16 * 1024, 4096,
> +			       SECT_4K | SPI_NOR_OCTAL_DTR_READ |
> +			       SPI_NOR_OCTAL_DTR_PP | SPI_NOR_4B_OPCODES)
> +		.fixups = &octaflash_fixups },
> +	{ "mx25lw51245g", INFO(0xc2863a, 0, 16 * 1024, 4096,
> +			       SECT_4K | SPI_NOR_OCTAL_DTR_READ |
> +			       SPI_NOR_OCTAL_DTR_PP | SPI_NOR_4B_OPCODES)
> +		.fixups = &octaflash_fixups },
> +	{ "mx25lm25645g", INFO(0xc28539, 0, 8 * 1024, 4096,
> +			       SECT_4K | SPI_NOR_OCTAL_DTR_READ |
> +			       SPI_NOR_OCTAL_DTR_PP | SPI_NOR_4B_OPCODES)
> +		.fixups = &octaflash_fixups },
> +	{ "mx25lw25645g", INFO(0xc28639, 0, 8 * 1024, 4096,
> +			       SECT_4K | SPI_NOR_OCTAL_DTR_READ |
> +			       SPI_NOR_OCTAL_DTR_PP | SPI_NOR_4B_OPCODES)
> +		.fixups = &octaflash_fixups },
> +	{ "mx66um2g45g", INFO(0xc2803c, 0, 64 * 1024, 4096,
> +			      SECT_4K | SPI_NOR_OCTAL_DTR_READ |
> +			      SPI_NOR_OCTAL_DTR_PP | SPI_NOR_4B_OPCODES)
> +		.fixups = &octaflash_fixups },
> +	{ "mx66uw2g345g", INFO(0xc2843c, 0, 64 * 1024, 4096,
> +			       SECT_4K | SPI_NOR_OCTAL_DTR_READ |
> +			       SPI_NOR_OCTAL_DTR_PP | SPI_NOR_4B_OPCODES)
> +		.fixups = &octaflash_fixups },
> +	{ "mx66uw2g345gx0", INFO(0xc2943c, 0, 64 * 1024, 4096,
> +				 SECT_4K | SPI_NOR_OCTAL_DTR_READ |
> +				 SPI_NOR_OCTAL_DTR_PP | SPI_NOR_4B_OPCODES)
> +		.fixups = &octaflash_fixups },
> +	{ "mx66um1g45g", INFO(0xc2803b, 0, 32 * 1024, 4096,
> +			      SECT_4K | SPI_NOR_OCTAL_DTR_READ |
> +			      SPI_NOR_OCTAL_DTR_PP | SPI_NOR_4B_OPCODES)
> +		.fixups = &octaflash_fixups },
> +	{ "mx66um1g45g40", INFO(0xc2808b, 0, 32 * 1024, 4096,
> +				SECT_4K | SPI_NOR_OCTAL_DTR_READ |
> +				SPI_NOR_OCTAL_DTR_PP | SPI_NOR_4B_OPCODES)
> +		.fixups = &octaflash_fixups },
> +	{ "mx66uw1g45g", INFO(0xc2813b, 0, 32 * 1024, 4096,
> +			      SECT_4K | SPI_NOR_OCTAL_DTR_READ |
> +			      SPI_NOR_OCTAL_DTR_PP | SPI_NOR_4B_OPCODES)
> +		.fixups = &octaflash_fixups },
> +	{ "mx25um51245g", INFO(0xc2803a, 0, 16 * 1024, 4096,
> +			       SECT_4K | SPI_NOR_OCTAL_DTR_READ |
> +			       SPI_NOR_OCTAL_DTR_PP | SPI_NOR_4B_OPCODES)
> +		.fixups = &octaflash_fixups },
> +	{ "mx25uw51245g", INFO(0xc2813a, 0, 16 * 1024, 4096,
> +			       SECT_4K | SPI_NOR_OCTAL_DTR_READ |
> +			       SPI_NOR_OCTAL_DTR_PP | SPI_NOR_4B_OPCODES)
> +		.fixups = &octaflash_fixups },
> +	{ "mx25uw51345g", INFO(0xc2843a, 0, 16 * 1024, 4096,
> +			       SECT_4K | SPI_NOR_OCTAL_DTR_READ |
> +			       SPI_NOR_OCTAL_DTR_PP | SPI_NOR_4B_OPCODES)
> +		.fixups = &octaflash_fixups },
> +	{ "mx25um25645g", INFO(0xc28039, 0, 8 * 1024, 4096,
> +			       SECT_4K | SPI_NOR_OCTAL_DTR_READ |
> +			       SPI_NOR_OCTAL_DTR_PP | SPI_NOR_4B_OPCODES)
> +		.fixups = &octaflash_fixups },
> +	{ "mx25uw25645g", INFO(0xc28139, 0, 8 * 1024, 4096,
> +			       SECT_4K | SPI_NOR_OCTAL_DTR_READ |
> +			       SPI_NOR_OCTAL_DTR_PP | SPI_NOR_4B_OPCODES)
> +		.fixups = &octaflash_fixups },
> +	{ "mx25um25345g", INFO(0xc28339, 0, 8 * 1024, 4096,
> +			       SECT_4K | SPI_NOR_OCTAL_DTR_READ |
> +			       SPI_NOR_OCTAL_DTR_PP | SPI_NOR_4B_OPCODES)
> +		.fixups = &octaflash_fixups },
> +	{ "mx25uw25345g", INFO(0xc28439, 0, 8 * 1024, 4096,
> +			       SECT_4K | SPI_NOR_OCTAL_DTR_READ |
> +			       SPI_NOR_OCTAL_DTR_PP | SPI_NOR_4B_OPCODES)
> +		.fixups = &octaflash_fixups },
> +	{ "mx25uw12845g", INFO(0xc28138, 0, 4 * 1024, 4096,
> +			       SECT_4K | SPI_NOR_OCTAL_DTR_READ |
> +			       SPI_NOR_OCTAL_DTR_PP | SPI_NOR_4B_OPCODES)
> +		.fixups = &octaflash_fixups },
> +	{ "mx25uw12a45g", INFO(0xc28938, 0, 4 * 1024, 4096,
> +			       SECT_4K | SPI_NOR_OCTAL_DTR_READ |
> +			       SPI_NOR_OCTAL_DTR_PP | SPI_NOR_4B_OPCODES)
> +		.fixups = &octaflash_fixups },
> +	{ "mx25uw12345g", INFO(0xc28438, 0, 4 * 1024, 4096,
> +			       SECT_4K | SPI_NOR_OCTAL_DTR_READ |
> +			       SPI_NOR_OCTAL_DTR_PP | SPI_NOR_4B_OPCODES)
> +		.fixups = &octaflash_fixups },
> +	{ "mx25uw6445g", INFO(0xc28137, 0, 2 * 1024, 4096,
> +			      SECT_4K | SPI_NOR_OCTAL_DTR_READ |
> +			      SPI_NOR_OCTAL_DTR_PP | SPI_NOR_4B_OPCODES)
> +		.fixups = &octaflash_fixups },
> +	{ "mx25uw6345g", INFO(0xc28437, 0, 2 * 1024, 4096,
> +			      SECT_4K | SPI_NOR_OCTAL_DTR_READ |
> +			      SPI_NOR_OCTAL_DTR_PP | SPI_NOR_4B_OPCODES)
> +		.fixups = &octaflash_fixups },

Reminder to self: Check if there are any ID collisions here. I have seen 
a couple of them show up recently on Macronix flashes.

Anyway, not much to see here. I suggest you merge this with patch 1.

>  };
>  
>  static void macronix_default_init(struct spi_nor *nor)

-- 
Regards,
Pratyush Yadav
Texas Instruments Inc.