topic How to access spi nor flash from rootfs in i.MX Processors

How to access spi nor flash from rootfs

learner24 — Thu, 05 Apr 2018 10:12:08 GMT

HI,

I have imx6 solo custom board. It boots from spi nor flash (m25p80). In uboot i can read/write and erase the flash. But i'm not sure how to access the nor flash after booting from rootfs.

I have enabled m25p80 driver in the dts. But i dont see any device node created in the /dev to access this.

Is there any sysfs entries to access this or do i need to create a device node for the same. if creating device node. what would be the major & minor number for this

When i check /proc/mtd , it seems to be blank.

Re: How to access spi nor flash from rootfs

igorpadykov — Thu, 05 Apr 2018 23:19:32 GMT

Hi Chaitanya

please check Chapter 31 SPI NOR Flash Memory Technology Device (MTD)
Driver attached Linux Manual and

Boot flash access from Linux - Boundary Devices

Best regards
igor
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