>> If we don't use GPIO as CS, then SPORT can provide >cs-change-per-word kind of CS. >> And we can't control it.I will add the comments in the driver. > >to be frank, such CS functionality is currently (and for the >foreseeable future) completely useless. the common SPI >framework does not support toggling the cs per-word, only >per-transaction. adding support to the bus master when >nothing out there wants it sounds like bloat to me. we should >only accept GPIO CS's with the SPORT/SPI driver.
Yes, the spi spec doesn't mention this scheme. I also think our spi controller should use GPIO as CS as well. Since I don't see essential difference between GPIO CS and internal CS, While there are some problems with internal CS,such as cs-change-per-word in some modes. Any thoughs? Cliff. _______________________________________________ Linux-kernel-commits mailing list [email protected] https://blackfin.uclinux.org/mailman/listinfo/linux-kernel-commits
