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tty/serial: Add support for Altera serial port

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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>
This commit is contained in:
Ley Foon Tan 2013-03-07 10:28:37 +08:00 committed by Greg Kroah-Hartman
parent 5771a8051d
commit e06c93cacb
4 changed files with 35 additions and 2 deletions
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3
Documentation/devicetree/bindings/tty/serial/of-serial.txt
View file

@ -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.

23
drivers/tty/serial/8250/8250.c
View file

@ -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 */

6
drivers/tty/serial/of_serial.c
View file

@ -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, },

5
include/uapi/linux/serial_core.h
View file

@ -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