This reverts commit 1cfaf005943342fdeddb2c5fe9626953a0b502a1.
We can actually run at any SPI speed - some cards run fine at 49 that wont run at 50. Our assumption about how the divisor worked was incorrect and we'd slow the SPI bus too much for no reason.
Removed the warning to the user too - a 25MHz SPI is plenty fast here. Need to still update the troubleshooting docs to take the info in the Slow SPI article into account.
This reverts commit 1cfaf005943342fdeddb2c5fe9626953a0b502a1.
We can actually run at any SPI speed - some cards run fine at 49 that wont run at 50. Our assumption about how the divisor worked was incorrect and we'd slow the SPI bus too much for no reason.
Removed the warning to the user too - a 25MHz SPI is plenty fast here. Need to still update the troubleshooting docs to take the info in the Slow SPI article into account.