[U-Boot,08/15] spi: Add parameter for maximum write size

Message ID 1356560913-2205-9-git-send-email-sjg@chromium.org
State Superseded, archived
Delegated to: Simon Glass
Headers show

Commit Message

Simon Glass Dec. 26, 2012, 10:28 p.m.
Some SPI controllers (e.g. Intel ICH) have a limit on the number of SPI
bytes that can be written at a time. Add this as a parameter so that
clients of the SPI interface can respect this value.

Signed-off-by: Simon Glass <sjg@chromium.org>
 include/spi.h |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)


diff --git a/include/spi.h b/include/spi.h
index ebc9652..3fe2e1e 100644
--- a/include/spi.h
+++ b/include/spi.h
@@ -49,10 +49,13 @@ 
  *   bus:	ID of the bus that the slave is attached to.
  *   cs:	ID of the chip select connected to the slave.
+ *   max_write_size:	If non-zero, the maximum number of bytes which can
+ *		be written at once, excluding command bytes.
 struct spi_slave {
 	unsigned int	bus;
 	unsigned int	cs;
+	unsigned int max_write_size;