RPI0W: sdhc0/bwfm0 not working since 2020-01-25 build

[lukeross]

Using build 2019-11-24, bwfm wifi worked on the 0W. In 2020-01-25 the wifi does not come up because there is a problem setting up sdhc0.

This is visible in the dmesg in the commit diff:

48a9ba7#diff-14c3df13afa1ae9dd38c2f561e6258fcR89

You can see:

+ sdhc0: cmd crc error
+ sdhc0: cmd crc error
+ sdhc0: cmd crc error
+ sdmmc1: sdmmc_mem_enable failed with error 60
+ sdmmc1: autoconfiguration error: couldn't enable card: 60

and the set-up of bwfm0 no longer occurs:

- sdmmc1: 4-bit width, 50.000 MHz
- bwfm0 at sdmmc1 function 1

I hope this information is useful.

[lukeross]

From port-arm, it seems this also affects -current: http://gnats.netbsd.org/cgi-bin/query-pr-single.pl?number=54959