Write to an A1-rated Micro SD card failed
#8
The MMC driver in the Linux kernel uses the SWITCH (CMD6) command.  There are a few interesting C functions:

The slight trouble is that the results of the SWITCH (CMD6) command, in the current state of the MMC driver, are not directly available for debugging purposes.  Regarding the issue I've originally described in this thread, my current "suspect" is the sd_set_current_limit() function, which may not properly handle all possible cases, i.e. all combinations of the MMC host capabilities and the microSD card requirements.
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RE: Write to an A1-rated Micro SD card failed - by dsimic - 05-17-2021, 06:38 PM

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