altera_uart: Add support for different address strides

Some controllers implement registers with a stride, to support
those we must implement the proper IO accessors.

Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
Acked-by: Tobias Klauser <tklauser@distanz.ch>
Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/altera_uart.h b/include/linux/altera_uart.h
index 8d441064a30d..c022c82db7ca 100644
--- a/include/linux/altera_uart.h
+++ b/include/linux/altera_uart.h
@@ -9,6 +9,7 @@ struct altera_uart_platform_uart {
         unsigned long mapbase;  /* Physical address base */
         unsigned int irq;       /* Interrupt vector */
         unsigned int uartclk;   /* UART clock rate */
+        unsigned int bus_shift; /* Bus shift (address stride) */
 };
 
 #endif /* __ALTUART_H */