patrislav #RIPNatenom
@mntmn I had a similar issue when bringing up a board with a SD 3.0 interface; I don't remember the exact reason, I think it had to do with the protocol upgrade to 3.0 after the autonegotiation (something about 3.0 was not implemented correctly on the H/W or SoC config, maybe some voltage or enable signal missing)
eMMC is simpler than SD due to less circuitry in between, so there should be less stuff that can go wrong...
one debug step could be to disable the faster I/F versions and speeds?
patrislav #RIPNatenom
@mntmn if linux can talk to the eMMC and u-boot can't, could it also be worth to check the kernel log for in what mode it addresses the chip?
patrislav #RIPNatenom
@jay_peper Andy Singer made this nice cartoon about it
Firmware Engineer. Open Data & Open Hardware Enthusiast. Car-free since 1976. he/himPosts are searchable
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