This patch adds support for memory-mapped 8250-like UARTs on PowerPC platforms.
Signed-off-by: Laurent Pinchart <laurentp@xxxxxxxxxxxxxxxxx>
---
drivers/serial/8250.c | 10 ++++++++++
include/linux/serial_core.h | 1 +
2 files changed, 11 insertions(+), 0 deletions(-)
diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index be95e55..5e0e382 100644
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -380,6 +380,10 @@ static unsigned int serial_in(struct uart_8250_port *up, int offset)
} else
return readb(up->port.membase + offset);
+#ifdef CONFIG_PPC
+ case UPIO_PPC_MMIO:
+ return in_8(up->port.membase + offset);
+#endif
default:
return inb(up->port.iobase + offset);
}
@@ -429,6 +433,12 @@ serial_out(struct uart_8250_port *up, int offset, int value)
value = serial_in(up, UART_IER);
break;
+#ifdef CONFIG_PPC
+ case UPIO_PPC_MMIO:
+ out_8(up->port.membase + offset, value);
+ break;
+#endif
+
default:
outb(value, up->port.iobase + offset);
}
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index d8f31de..1d8b940 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -261,6 +261,7 @@ struct uart_port {
#define UPIO_TSI (5) /* Tsi108/109 type IO */
#define UPIO_DWAPB (6) /* DesignWare APB UART */
#define UPIO_RM9000 (7) /* RM9000 type IO */
+#define UPIO_PPC_MMIO (8) /* PowerPC-style MMIO */
unsigned int read_status_mask; /* driver specific */
unsigned int ignore_status_mask; /* driver specific */
--
1.5.0
--
Laurent Pinchart
CSE Semaphore Belgium
Chaussee de Bruxelles, 732A
B-1410 Waterloo
Belgium
T +32 (2) 387 42 59
F +32 (2) 387 42 75
Attachment:
signature.asc
Description: This is a digitally signed message part.
