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@xxxxxxxxx>
---
drivers/tty/serial/serial_core.c | 2 ++
include/linux/serial_core.h | 13 +++++++------
2 files changed, 9 insertions(+), 6 deletions(-)
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index eaeb9a0..ecc7d6c 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -2092,6 +2092,7 @@ uart_report_port(struct uart_driver *drv, struct uart_port *port)
break;
case UPIO_MEM:
case UPIO_MEM32:
+ case UPIO_MEM32BE:
case UPIO_AU:
case UPIO_TSI:
snprintf(address, sizeof(address),
@@ -2736,6 +2737,7 @@ int uart_match_port(struct uart_port *port1, struct uart_port *port2)
(port1->hub6 == port2->hub6);
case UPIO_MEM:
case UPIO_MEM32:
+ case UPIO_MEM32BE:
case UPIO_AU:
case UPIO_TSI:
return (port1->mapbase == port2->mapbase);
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index 21c2e05..d2d5bf6 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -140,12 +140,13 @@ struct uart_port {
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 */
--
2.1.0
