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SubjectRe: [PATCH] mtd: spi-nor: add support for Microchip 25LC256
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On 05/04/2018 05:54 PM, Radu Pirea wrote:
> Added geometry description for Microchip 25LC256 memory.

Are you sure this is a SPI NOR ? I don't see any RDID instruction in the
datasheet, only some 6 instructions to read/write the array and lock it.
Isn't the AT25 driver a better fit for this EEPROM ?

> Signed-off-by: Radu Pirea <radu.pirea@microchip.com>
> ---
> drivers/mtd/devices/m25p80.c | 3 +++
> drivers/mtd/spi-nor/spi-nor.c | 3 +++
> 2 files changed, 6 insertions(+)
>
> diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c
> index a4e18f6aaa33..1e359d811261 100644
> --- a/drivers/mtd/devices/m25p80.c
> +++ b/drivers/mtd/devices/m25p80.c
> @@ -372,6 +372,9 @@ static const struct spi_device_id m25p_ids[] = {
> { "mr25h10" }, /* 1 Mib, 40 MHz */
> { "mr25h40" }, /* 4 Mib, 40 MHz */
>
> + /* Microchip */
> + { "25lc256" },
> +
> { },
> };
> MODULE_DEVICE_TABLE(spi, m25p_ids);
> diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
> index d445a4d3b770..6341c86be647 100644
> --- a/drivers/mtd/spi-nor/spi-nor.c
> +++ b/drivers/mtd/spi-nor/spi-nor.c
> @@ -1076,6 +1076,9 @@ static const struct flash_info spi_nor_ids[] = {
> { "mx66l1g45g", INFO(0xc2201b, 0, 64 * 1024, 2048, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
> { "mx66l1g55g", INFO(0xc2261b, 0, 64 * 1024, 2048, SPI_NOR_QUAD_READ) },
>
> + /* Microchip */
> + { "25lc256", CAT25_INFO(32 * 1024, 1, 64, 2, SPI_NOR_NO_ERASE | SPI_NOR_NO_FR) },
> +
> /* Micron */
> { "n25q016a", INFO(0x20bb15, 0, 64 * 1024, 32, SECT_4K | SPI_NOR_QUAD_READ) },
> { "n25q032", INFO(0x20ba16, 0, 64 * 1024, 64, SPI_NOR_QUAD_READ) },
>


--
Best regards,
Marek Vasut

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