1 files changed, 7 insertions, 0 deletions

diff --git a/include/linux/smc91x.h b/include/linux/smc91x.h
index 90434db72db2..0dea9459a8e4 100644
--- a/include/linux/smc91x.h
+++ b/include/linux/smc91x.h
@@ -7,6 +7,13 @@
 
 #define SMC91X_NOWAIT           (1 << 3)
 
+/* two bits for IO_SHIFT, let's hope later designs will keep this sane */
+#define SMC91X_IO_SHIFT_0       (0 << 4)
+#define SMC91X_IO_SHIFT_1       (1 << 4)
+#define SMC91X_IO_SHIFT_2       (2 << 4)
+#define SMC91X_IO_SHIFT_3       (3 << 4)
+#define SMC91X_IO_SHIFT(x)      (((x) >> 4) & 0x3)
+
 struct smc91x_platdata {
         unsigned long flags;
 };