use eim in userspace

vvjay — Tue, 18 Oct 2016 13:59:37 GMT

Hi,

yesterday i configured eim in our board to communicate with fpga, and use /unit_test/memtools （./memtools -16 0x0800000a=0x000f）tool to test it ,and i successfully read the data(0x000f) in fpga , so eim is configured correctly. but i have a problem：how to use eim without memtools. i found in board_init function ，when configuring eim interface , i register a platform device (physmap-flash) into the system, and the resource of it is start with CS0_BASE_ADDR and end with CS0_BASE_ADDR+0x02000000-1 which is just the memory space of eim, so i check the /sys/devices/platform/physmap-flash.0 but there is no driver, does it mean if i want to use eim as a device, i have to write a driver for it? or nxp support the driver ,and i didn't find it？or there is other way to use it? i have checked rm and firmware guide,and got nothing. i use imx6q-sabresd board and linux-3.0.35.

Thank you very much!

Jay

Re: use eim in userspace

igorpadykov — Tue, 18 Oct 2016 23:51:07 GMT

Hi Jay

for available drivers please look at attached Linux Manual Chapter 26
SPI NOR Flash Memory Technology Device (MTD) Driver. Seems for custom

purposes one will have to write a driver for it and add sys/ entries using

approaches described in linux documents.

c - How to create a simple sysfs class attribute in Linux kernel v3.2 - Stack Overflow

Best regards
igor
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use eim in userspace

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