[PATCH][MIPS][5/6] AR7: serial hack

[Matteo Croce <technoboy85@gmail.com>]

Signed-off-by: Matteo Croce <technoboy85@gmail.com>
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Nicolas Thill <nico@openwrt.org>

diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index f94109c..94253b7 100644
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -267,6 +267,13 @@ static const struct serial8250_config uart_config[] = {
                .fcr            = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10,
                .flags          = UART_CAP_FIFO,
        },
+       [PORT_AR7] = {
+               .name           = "TI-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)
@@ -2453,7 +2460,11 @@ static void serial8250_console_putchar(struct uart_port 
*port, int ch)
 {
        struct uart_8250_port *up = (struct uart_8250_port *)port;
 
+#ifdef CONFIG_AR7
+       wait_for_xmitr(up, BOTH_EMPTY);
+#else
        wait_for_xmitr(up, UART_LSR_THRE);
+#endif
        serial_out(up, UART_TX, ch);
 }
 
diff --git a/include/linux/serialP.h b/include/linux/serialP.h
index e811a61..cf71de9 100644
--- a/include/linux/serialP.h
+++ b/include/linux/serialP.h
@@ -135,6 +135,10 @@ struct rs_multiport_struct {
  * the interrupt line _up_ instead of down, so if we register the IRQ
  * while the UART is in that state, we die in an IRQ storm. */
 #define ALPHA_KLUDGE_MCR (UART_MCR_OUT2)
+#elif defined(CONFIG_AR7)
+/* This is how it is set up by bootloader... */
+#define ALPHA_KLUDGE_MCR (UART_MCR_OUT2 | UART_MCR_OUT1 \
+                       | UART_MCR_RTS | UART_MCR_DTR)
 #else
 #define ALPHA_KLUDGE_MCR 0
 #endif
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index 09d17b0..8ad2c3b 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -40,6 +40,7 @@
 #define PORT_NS16550A  14
 #define PORT_XSCALE    15
 #define PORT_RM9000    16      /* PMC-Sierra RM9xxx internal UART */
+#define PORT_AR7       16
 #define PORT_MAX_8250  16      /* max port ID */
 
 /*