tty/serial: Add support for Altera serial port

Add support for Altera 8250/16550 compatible serial port.

Signed-off-by: Ley Foon Tan <lftan@altera.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/Documentation/devicetree/bindings/tty/serial/of-serial.txt b/Documentation/devicetree/bindings/tty/serial/of-serial.txt
index 1e1145ca4f3c2cb192f7e4bf5ce95f6c73ba0801..8f01cb190f25686747873ab54eaa53652c9b35bc 100644 (file)
--- a/Documentation/devicetree/bindings/tty/serial/of-serial.txt
+++ b/Documentation/devicetree/bindings/tty/serial/of-serial.txt
@@ -11,6 +11,9 @@ Required properties:
        - "nvidia,tegra20-uart"
        - "nxp,lpc3220-uart"
        - "ibm,qpace-nwp-serial"
+       - "altr,16550-FIFO32"
+       - "altr,16550-FIFO64"
+       - "altr,16550-FIFO128"
        - "serial" if the port type is unknown.
 - reg : offset and length of the register set for the device.
 - interrupts : should contain uart interrupt.

diff --git a/drivers/tty/serial/8250/8250.c b/drivers/tty/serial/8250/8250.c
index 0efc815a496869fbe80cec247fb99af9286105f9..661096d256206fd4fdd498c47a9eb46e6fcb7ea0 100644 (file)
--- a/drivers/tty/serial/8250/8250.c
+++ b/drivers/tty/serial/8250/8250.c
@@ -301,7 +301,28 @@ static const struct serial8250_config uart_config[] = {
        },
        [PORT_8250_CIR] = {
                .name           = "CIR port"
-       }
+       },
+       [PORT_ALTR_16550_F32] = {
+               .name           = "Altera 16550 FIFO32",
+               .fifo_size      = 32,
+               .tx_loadsz      = 32,
+               .fcr            = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10,
+               .flags          = UART_CAP_FIFO | UART_CAP_AFE,
+       },
+       [PORT_ALTR_16550_F64] = {
+               .name           = "Altera 16550 FIFO64",
+               .fifo_size      = 64,
+               .tx_loadsz      = 64,
+               .fcr            = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10,
+               .flags          = UART_CAP_FIFO | UART_CAP_AFE,
+       },
+       [PORT_ALTR_16550_F128] = {
+               .name           = "Altera 16550 FIFO128",
+               .fifo_size      = 128,
+               .tx_loadsz      = 128,
+               .fcr            = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10,
+               .flags          = UART_CAP_FIFO | UART_CAP_AFE,
+       },
 };
 
 /* Uart divisor latch read */

diff --git a/drivers/tty/serial/of_serial.c b/drivers/tty/serial/of_serial.c
index d5874605682b77c69a272d71307fc24c70289b24..b025d54382754456efbb021e466079727381bcba 100644 (file)
--- a/drivers/tty/serial/of_serial.c
+++ b/drivers/tty/serial/of_serial.c
@@ -241,6 +241,12 @@ static struct of_device_id of_platform_serial_table[] = {
        { .compatible = "ns16850",  .data = (void *)PORT_16850, },
        { .compatible = "nvidia,tegra20-uart", .data = (void *)PORT_TEGRA, },
        { .compatible = "nxp,lpc3220-uart", .data = (void *)PORT_LPC3220, },
+       { .compatible = "altr,16550-FIFO32",
+               .data = (void *)PORT_ALTR_16550_F32, },
+       { .compatible = "altr,16550-FIFO64",
+               .data = (void *)PORT_ALTR_16550_F64, },
+       { .compatible = "altr,16550-FIFO128",
+               .data = (void *)PORT_ALTR_16550_F128, },
 #ifdef CONFIG_SERIAL_OF_PLATFORM_NWPSERIAL
        { .compatible = "ibm,qpace-nwp-serial",
                .data = (void *)PORT_NWPSERIAL, },

diff --git a/include/uapi/linux/serial_core.h b/include/uapi/linux/serial_core.h
index b6a23a483d740d635f50bf2ab5261510396e5dff..74c2bf7211f85ed0a55f82987d690cd6bc9aad7c 100644 (file)
--- a/include/uapi/linux/serial_core.h
+++ b/include/uapi/linux/serial_core.h
@@ -51,7 +51,10 @@
 #define PORT_8250_CIR  23      /* CIR infrared port, has its own driver */
 #define PORT_XR17V35X  24      /* Exar XR17V35x UARTs */
 #define PORT_BRCM_TRUMANAGE    25
-#define PORT_MAX_8250  25      /* max port ID */
+#define PORT_ALTR_16550_F32 26 /* Altera 16550 UART with 32 FIFOs */
+#define PORT_ALTR_16550_F64 27 /* Altera 16550 UART with 64 FIFOs */
+#define PORT_ALTR_16550_F128 28 /* Altera 16550 UART with 128 FIFOs */
+#define PORT_MAX_8250  28      /* max port ID */
 
 /*
  * ARM specific type numbers.  These are not currently guaranteed