[PATCH] mtd: spi-nor: xmc: Add XM25QH128C identification

[Michael Walle]

On Sat Jul 18, 2026 at 11:38 PM CEST, Fabio Estevam wrote:
> From: Fabio Estevam <festevam at nabladev.com>
>
> The XMC XM25QH128C is a 128-Mbit SPI NOR flash with JEDEC ID
> 20 40 18.
>
> Add its identification entry. The device provides valid SFDP data, so
> its parameters continue to be initialized entirely from SFDP.

So why do you need an entry? We don't add .names on new entries.

> The flash is populated on the Firefly ROC-RK3399-PC Plus board.
>
> Signed-off-by: Fabio Estevam <festevam at nabladev.com>
> ---
> Tested on a Firefly ROC-RK3399-PC Plus using the
> "rockchip,rk3399-spi" controller at 30 MHz.
>
> root at rk3399-station-p1:~# cat /sys/bus/spi/devices/spi1.0/spi-nor/partname
> XM25QH128C
> root at rk3399-station-p1:~# cat /sys/bus/spi/devices/spi1.0/spi-nor/jedec_id
> 204018
> root at rk3399-station-p1:~# cat /sys/bus/spi/devices/spi1.0/spi-nor/manufacturer
> xmc
> root at rk3399-station-p1:~# hexdump -Cv /sys/bus/spi/devices/spi1.0/spi-nor/sfdp
> 00000000  53 46 44 50 06 01 02 ff  00 06 01 10 30 00 00 ff  |SFDP........0...|
> 00000010  20 00 01 04 d0 00 00 ff  84 00 01 02 c0 00 00 ff  | ...............|
> 00000020  ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff  |................|
> 00000030  e5 20 f1 ff ff ff ff 07  44 eb 08 6b 08 3b 42 bb  |. ......D..k.;B.|
> 00000040  fe ff ff ff ff ff 00 ff  ff ff 40 eb 0c 20 0f 52  |.......... at .. .R|
> 00000050  10 d8 00 ff 24 02 06 01  82 a7 03 cd cc a1 06 35  |....$..........5|
> 00000060  7a 75 7a 75 f7 a9 d5 5c  19 f6 4d ff e9 10 c0 80  |zuzu...\..M.....|
> 00000070  ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff  |................|
> 00000080  ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff  |................|
> 00000090  ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff  |................|
> 000000a0  ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff  |................|
> 000000b0  ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff  |................|
> 000000c0  00 00 f0 ff ff ff ff ff  ff ff ff ff ff ff ff ff  |................|
> 000000d0  00 36 00 23 9f f9 77 64  00 e8 ff ff ff ff ff ff  |.6.#..wd........|
> 000000e0

Thanks!

> root at rk3399-station-p1:~# sha256sum /sys/bus/spi/devices/spi1.0/spi-nor/sfdp
> c027b82ebfdf18e455c6366a9d57602b36f2956d4307b770954544918102d9b3  /sys/bus/spi/devices/spi1.0/spi-nor/sfdp

-michael
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