use eim in userspace

[vvjay]

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

[igorpadykov]

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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