Quad spi flash from Linux (imx7ulpevk)

[Louson]

Hello, I am using the IMX7ulpevk board with kernel linux-imx on tag rel_imx_5.4.24_2.1.0.

Is it possible to access the squad spi flash from Linux for modifications ? Does that only need change in the device tree ?

Louson

[Louson]

suppressed

[igorpadykov · Accepted solution]

Hi Louson

examples of access can be found on

https://wiki.phytec.com/pcm061/using-peripherals/qspi-nor-flash

One can try with EVK  i.MX 7ULP EVK Linux Binary Demo Files 

L5.4.47_2.2.0_MX7ULP1

for qspi use dts file: imx7ulp-evk-qspi.dts

https://source.codeaurora.org/external/imx/uboot-imx/tree/arch/arm/dts/imx7ulp-evk-qspi.dts?h=imx_v2...

Best regards
igor

[Louson]

Hello,

Thanks fo this quick answer. However, there is no qspi devive tree in this 5.4.47 release. Is's been missing for imx7ulp since the kernel is 5.x.

The linked dts is from the u-boot device tree, which is not exactly compatible with linux's. I'll try again though

Louis

[igorpadykov]

Hi Louis

qspi is not used in linux because it is used by M4 SDK (folder ../driver_examples/qspi)

https://mcuxpresso.nxp.com/en/welcome

Best regards
igor