serial: core: Add big-endian iotype
Since most drivers interpret UPIO_MEM32 to mean "little-endian" and use
readl/writel to access the registers, add a parallel UPIO_MEM32BE to
request the use of big-endian MMIO accessors (ioread32be/iowrite32be).
Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index 3231a43..057038c 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -142,12 +142,13 @@
unsigned char iotype; /* io access style */
unsigned char unused1;
-#define UPIO_PORT (0)
-#define UPIO_HUB6 (1)
-#define UPIO_MEM (2)
-#define UPIO_MEM32 (3)
-#define UPIO_AU (4) /* Au1x00 and RT288x type IO */
-#define UPIO_TSI (5) /* Tsi108/109 type IO */
+#define UPIO_PORT (0) /* 8b I/O port access */
+#define UPIO_HUB6 (1) /* Hub6 ISA card */
+#define UPIO_MEM (2) /* 8b MMIO access */
+#define UPIO_MEM32 (3) /* 32b little endian */
+#define UPIO_MEM32BE (4) /* 32b big endian */
+#define UPIO_AU (5) /* Au1x00 and RT288x type IO */
+#define UPIO_TSI (6) /* Tsi108/109 type IO */
unsigned int read_status_mask; /* driver specific */
unsigned int ignore_status_mask; /* driver specific */