[FS#3461] Enhancement : add CONFIG_DEVMEM=y for targets/x86/64

[OpenWrt Bugs]

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User who did this - Ghatothkach Tadav (ghatothkach) 

Attached to Project - OpenWrt/LEDE Project
Summary - Enhancement : add CONFIG_DEVMEM=y for targets/x86/64
Task Type - Bug Report
Category - Kernel
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Low
Priority - Very Low
Reported Version - All
Due in Version - Undecided
Due Date - Undecided
Details - hi

Apparently CONFIG_DEVMEM=y is not set for these builds. 

It is very handy to have it set, so one can upgrade the bios on the pcengines APU boards using flashrom. 

http://downloads.openwrt.org/releases/*/targets/x86/64/

root at router:/disk/pcengines/apu4/bios# flashrom -w apu4_v4.11.0.6.rom -p internal
flashrom v1.0 on Linux 4.14.195 (x86_64)
flashrom is free software, get the source code at https://flashrom.org

Using clock_gettime for delay loops (clk_id: 1, resolution: 1ns).
Critical error: open(/dev/mem): No such file or directory
Error accessing low megabyte, 0x100000 bytes at 0x0000000000000000
/dev/mem mmap failed: No such file or directory
Failed getting access to coreboot low tables.
Critical error: open(/dev/mem): No such file or directory
Error accessing DMI, 0x10000 bytes at 0x00000000000f0000
/dev/mem mmap failed: No such file or directory
Found chipset "AMD FCH".
Enabling flash write... Critical error: open(/dev/mem): No such file or directory
Error accessing SB600 SPI registers, 0x1000 bytes at 0x00000000fec10000
/dev/mem mmap failed: No such file or directory
FAILED!
FATAL ERROR!
Error: Programmer initialization failed.


   

More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=3461

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