From: Simon Glass <sjg@chromium.org>
Date: Mon, 11 Mar 2013 06:08:05 +0000 (+0000)
Subject: spi: Add parameter for maximum write size
X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=0c456cee952f3fa5ae6f5c42f960eeaa39140b62;p=u-boot.git

spi: Add parameter for maximum write size

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>
---

diff --git a/include/spi.h b/include/spi.h
index ebc9652160..3fe2e1eab2 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;
 };
 
 /*-----------------------------------------------------------------------