[PATCH] mtd: spi-nor: micron-st: Add support for mt25qu01g
Michael Walle
michael at walle.cc
Tue Oct 24 02:26:21 PDT 2023
[+ Takahiro]
> Add support for the MT25QU01G 128MB Micron Serial NOR Flash Memory
> model.
>
> Datasheet:
> https://www.micron.com/-/media/client/global/documents/products/data-sheet/nor-flash/serial-nor/mt25q/die-rev-b/mt25q_qlkt_u_01g_bbb_0.pdf
As a "Link:" tag please.
Please also include a SFDP dump, see [1].
> Tested on a i.MX8MP based board:
>
> # dmesg | grep spi-nor
> [ 1.854474] spi-nor spi0.0: mt25qu01g (131072 Kbytes)
>
> # cat /proc/mtd
> dev: size erasesize name
> mtd0: 08000000 00001000 "30bb0000.spi"
>
> Signed-off-by: Fabio Estevam <festevam at denx.de>
> ---
> drivers/mtd/spi-nor/micron-st.c | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/drivers/mtd/spi-nor/micron-st.c
> b/drivers/mtd/spi-nor/micron-st.c
> index 8920547c12bf..da2f8992bbc0 100644
> --- a/drivers/mtd/spi-nor/micron-st.c
> +++ b/drivers/mtd/spi-nor/micron-st.c
> @@ -429,6 +429,13 @@ static const struct flash_info st_nor_parts[] = {
> SPI_NOR_BP3_SR_BIT6,
> .no_sfdp_flags = SECT_4K | SPI_NOR_QUAD_READ,
> .mfr_flags = USE_FSR,
> + }, {
> + .id = SNOR_ID(0x20, 0xbb, 0x21, 0x10, 0x44, 0x00),
> + .name = "mt25qu01g",
> + .size = SZ_128M,
Not needed, parsed by SFDP.
> + .flags = NO_CHIP_ERASE,
Is it fair to assume that this is the usual case for multi die chips?
See also,
https://lore.kernel.org/linux-mtd/cover.1680849425.git.Takahiro.Kuwano@infineon.com/
So "if n_dice > 1" will implicitly be NO_CHIP_ERASE. n_dice should be
parsed from SFDP.
> + .no_sfdp_flags = SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ,
.no_sfdp_flags are legacy and shouldn't be used with new flashes.
> + .mfr_flags = USE_FSR,
> }, {
> .id = SNOR_ID(0x20, 0xbb, 0x21),
> .name = "n25q00a",
-michael
[1]
https://lore.kernel.org/all/4304e19f3399a0a6e856119d01ccabe0@walle.cc/
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