From 0c456cee952f3fa5ae6f5c42f960eeaa39140b62 Mon Sep 17 00:00:00 2001
From: Simon Glass <sjg@chromium.org>
Date: Mon, 11 Mar 2013 06:08:05 +0000
Subject: [PATCH] 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>
---
include/spi.h | 3 +++
1 file changed, 3 insertions(+)
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;
};
/*-----------------------------------------------------------------------
--
2.39.5