linux-kernel - Re: [PATCH v4 2/3] mtd: spi-nor: Add additional octal-mode page program flags to be checked during SFDP 4BAIT parsing

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Date:   Mon, 26 Dec 2022 10:14:22 +0200
From:   Tudor Ambarus <tudor.ambarus@...aro.org>
To:     Nathan Barrett-Morrison <nathan.morrison@...esys.com>
Cc:     greg.malysa@...esys.com,
        Tudor Ambarus <tudor.ambarus@...rochip.com>,
        Pratyush Yadav <pratyush@...nel.org>,
        Michael Walle <michael@...le.cc>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        "open list:SPI NOR SUBSYSTEM" <linux-mtd@...ts.infradead.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 2/3] mtd: spi-nor: Add additional octal-mode page
 program flags to be checked during SFDP 4BAIT parsing



On 02.12.2022 15:55, Nathan Barrett-Morrison wrote:
> This adds some support for automatically searching a chip's SFDP table for:
you can drop ":"
> 
and this new line
> program commands: 1S-1S-8S, 1S-8S-8S
> 
> Signed-off-by: Nathan Barrett-Morrison <nathan.morrison@...esys.com>
> ---
>   drivers/mtd/spi-nor/sfdp.c | 8 ++++++++
>   1 file changed, 8 insertions(+)
> 
> diff --git a/drivers/mtd/spi-nor/sfdp.c b/drivers/mtd/spi-nor/sfdp.c
> index e4e87815ba94..e1b7547bf81e 100644
> --- a/drivers/mtd/spi-nor/sfdp.c
> +++ b/drivers/mtd/spi-nor/sfdp.c
> @@ -1089,6 +1089,14 @@ static int spi_nor_parse_4bait(struct spi_nor *nor,
>   		spi_nor_set_pp_settings(&params_pp[SNOR_CMD_PP_1_4_4],
>   					SPINOR_OP_PP_1_4_4_4B,
>   					SNOR_PROTO_1_4_4);
> +	if (pp_hwcaps & SNOR_HWCAPS_PP_1_1_8)
> +		spi_nor_set_pp_settings(&params_pp[SNOR_CMD_PP_1_1_8],
> +					SPINOR_OP_PP_1_1_8_4B,
> +					SNOR_PROTO_1_1_8);
> +	if (pp_hwcaps & SNOR_HWCAPS_PP_1_8_8)
> +		spi_nor_set_pp_settings(&params_pp[SNOR_CMD_PP_1_8_8],
> +					SPINOR_OP_PP_1_8_8_4B,
> +					SNOR_PROTO_1_8_8);

Why did you choose to not add support for reads as well?

>   
>   	for (i = 0; i < SNOR_ERASE_TYPE_MAX; i++) {
>   		if (erase_mask & BIT(i))