Title: [8977] trunk/Documentation/blackfin/bfin-spi-notes.txt: refine explanation
- Revision
- 8977
- Author
- hennerich
- Date
- 2010-07-06 11:39:09 -0400 (Tue, 06 Jul 2010)
Log Message
refine explanation
Modified Paths
Diff
Modified: trunk/Documentation/blackfin/bfin-spi-notes.txt (8976 => 8977)
--- trunk/Documentation/blackfin/bfin-spi-notes.txt 2010-07-06 13:57:12 UTC (rev 8976)
+++ trunk/Documentation/blackfin/bfin-spi-notes.txt 2010-07-06 15:39:09 UTC (rev 8977)
@@ -3,7 +3,8 @@
With the Blackfin on-chip SPI peripheral, there is some logic tied to the CPHA
bit whether the Slave Select Line is controlled by hardware (CPHA=0) or
controlled by software (CPHA=1). However, the Linux SPI bus driver assumes that
-the Slave Select being asserted during the entire SPI transfer.
+the Slave Select is always under software control and being asserted during
+the entire SPI transfer. - And not just bits_per_word duration.
In most cases you can utilize SPI MODE_3 instead of MODE_0 to work-around this
behavior. If your SPI slave device in question requires SPI MODE_0 or MODE_2
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