Re: [U-Boot] [PATCH v1 06/11] mmc: if possible, poll the busy state using DAT0

On 6/27/19 12:31 PM, Jean-Jacques Hiblot wrote:

Using the DAT0 line as a rdy/busy line is an alternative to reading the status register of the card. It especially useful in situation where the bus is not in a good shape, like when modes are switched. This is also how the linux driver behaves.

Signed-off-by: Jean-Jacques Hiblot jjhiblot@ti.com

Is this documented somewhere that this is an OK thing to do ? If the bus is not in a good shape, what guarantee do we have that DAT0 (part of the bus ;-) ) would be in good shape ?