i.MX Processors中的主题 Re: Quad spi flash from Linux (imx7ulpevk)

Quad spi flash from Linux (imx7ulpevk)

Louson — Fri, 02 Oct 2020 15:14:42 GMT

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

igorpadykov — Sat, 03 Oct 2020 13:18:49 GMT

Hi Louson

examples of access can be found on

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

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

Best regards
igor

Louson — Mon, 05 Oct 2020 09:11:55 GMT

suppressed

Louson — Mon, 05 Oct 2020 09:13:26 GMT

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 — Mon, 05 Oct 2020 10:36:01 GMT

Hi Louis

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

Best regards
igor