linux-kernel - Re: [PATCH v5 03/10] mtd: spi-nor: core: Update name and description of spansion_set_4byte_addr

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Date:   Mon, 03 Apr 2023 14:45:42 +0200
From:   Michael Walle <michael@...le.cc>
To:     Tudor Ambarus <tudor.ambarus@...aro.org>
Cc:     pratyush@...nel.org, miquel.raynal@...tlin.com, richard@....at,
        Takahiro.Kuwano@...ineon.com, bacem.daassi@...ineon.com,
        linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 03/10] mtd: spi-nor: core: Update name and description
 of spansion_set_4byte_addr_mode

Am 2023-03-31 09:45, schrieb Tudor Ambarus:
> Rename method to spi_nor_set_4byte_addr_mode_brwr and extend its
> description. This method is described in JESD216 BFPT[SFDP_DWORD(16)],
> BIT(28) and BIT(20).
> 
> Signed-off-by: Tudor Ambarus <tudor.ambarus@...aro.org>
> ---
>  drivers/mtd/spi-nor/core.c | 13 +++++++++----
>  1 file changed, 9 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
> index 07be81afdc33..e8f6141c0ef6 100644
> --- a/drivers/mtd/spi-nor/core.c
> +++ b/drivers/mtd/spi-nor/core.c
> @@ -564,15 +564,20 @@ int
> spi_nor_set_4byte_addr_mode_wren_en4b_ex4b(struct spi_nor *nor, bool
> enable)
>  }
> 
>  /**
> - * spansion_set_4byte_addr_mode() - Set 4-byte address mode for 
> Spansion
> - * flashes.
> + * spi_nor_set_4byte_addr_mode_brwr() - Set 4-byte address mode using
> + *			SPINOR_OP_BRWR. Typically used by Spansion flashes.
>   * @nor:	pointer to 'struct spi_nor'.
>   * @enable:	true to enter the 4-byte address mode, false to exit the 
> 4-byte
>   *		address mode.
>   *
> + * 8-bit volatile bank register used to define A[30:A24] bits. MSB 
> (bit[7]) is
> + * used to enable/disable 4-byte address mode. When MSB is set to ‘1’, 
> 4-byte
> + * address mode is active and A[30:24] bits are don’t care. Write
> instruction is
> + * SPINOR_OP_BRWR(17h) with 1 byte of data.
> + *

No "typically used by spansion"? I guess there is a reason for that.

In any case:
Reviewed-by: Michael Walle <michael@...le.cc>