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Bare metal, Assembly language • Re: sdhost access on rpi4

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Does anyone have an example of working code using the sdmux (i.e. SDHCI on the uSD slot)? I'm trying to figure out how to fiddle with the device tree for u-boot or linux to configure it. I checked all the referenced source code in this thread, and none of it seems to touch the mux.

I get that writing a 1 bit to 0x7e2d000d0 (or maybe 0xfe2d000d0?) is necessary, but I assume there are more changes in pin configuration necessary?

Statistics: Posted by jeremysalwen — Fri May 24, 2024 6:50 am



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