[NET] smc91x: prepare for SMC_IO_SHIFT to be a platform configurable variable
Now one can use the following code
#define SMC_IO_SHIFT lp->io_shift
to make SMC_IO_SHIFT a variable. This, however, will slightly increase
the CPU overhead and have negative impact on the network performance.
The tradeoff is, this can be specified in the smc91x platform data so
that multiple boards support can be built in a single zImage.
Signed-off-by: Eric Miao <eric.miao@marvell.com>
Acked-by: Nicolas Pitre <nico@cam.org>
Acked-by: Jeff Garzik <jgarzik@pobox.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/drivers/net/smc91x.h b/drivers/net/smc91x.h
index 8310f1a..80fb80f 100644
--- a/drivers/net/smc91x.h
+++ b/drivers/net/smc91x.h
@@ -500,6 +500,9 @@
void __iomem *base;
void __iomem *datacs;
+ /* the low address lines on some platforms aren't connected... */
+ int io_shift;
+
struct smc91x_platdata cfg;
};