[PATCH 8/8] 8250: add Texas Instruments AR7 internal UART

[Florian Fainelli <florian@openwrt.org>]

Hi Alan,

We discussed that in private, there are a couple of things
to fix in order to get 8250 working properly with TI AR7 HW.
If you can still merge that bit, this would ease future work, thanks !
--
From: Florian Fainelli <florian@openwrt.org>

This patch adds support for Texas Instruments AR7 internal
UART.

Signed-off-by: Florian Fainelli <florian@openwrt.org>
---
diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index a0127e9..fb867a9 100644
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -287,6 +287,13 @@ static const struct serial8250_config uart_config[] = {
                .fcr            = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10,
                .flags          = UART_CAP_FIFO,
        },
+       [PORT_AR7] = {
+               .name           = "AR7",
+               .fifo_size      = 16,
+               .tx_loadsz      = 16,
+               .fcr            = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_00,
+               .flags          = UART_CAP_FIFO | UART_CAP_AFE,
+       },
 };
 
 #if defined (CONFIG_SERIAL_8250_AU1X00)
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index 57a97e5..48766ea 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -41,7 +41,8 @@
 #define PORT_XSCALE    15
 #define PORT_RM9000    16      /* PMC-Sierra RM9xxx internal UART */
 #define PORT_OCTEON    17      /* Cavium OCTEON internal UART */
-#define PORT_MAX_8250  17      /* max port ID */
+#define PORT_AR7       18      /* Texas Instruments AR7 internal UART */
+#define PORT_MAX_8250  18      /* max port ID */
 
 /*
  * ARM specific type numbers.  These are not currently guaranteed