1 files changed, 6 insertions, 0 deletions

diff --git a/include/linux/spi/spi_bitbang.h b/include/linux/spi/spi_bitbang.h
index c961fe9bf3eb..c954557b757c 100644
--- a/include/linux/spi/spi_bitbang.h
+++ b/include/linux/spi/spi_bitbang.h
@@ -30,6 +30,12 @@ struct spi_bitbang {
 
         struct spi_master       *master;
 
+        /* setup_transfer() changes clock and/or wordsize to match settings
+         * for this transfer; zeroes restore defaults from spi_device.
+         */
+        int     (*setup_transfer)(struct spi_device *spi,
+                        struct spi_transfer *t);
+
         void    (*chipselect)(struct spi_device *spi, int is_on);
 #define BITBANG_CS_ACTIVE       1       /* normally nCS, active low */
 #define BITBANG_CS_INACTIVE     0