This adds a new UART port type for TI DA8xx/OMAPL13x/AM17xx/AM18xx. These
SoCs have standard 8250 registers plus some extra non-standard registers.
The UART will not function unless the non-standard Power and Emulation
Management Register (PWREMU_MGMT) is configured correctly. This is
currently handled in arch/arm/mach-davinci/serial.c for non-device-tree
boards. Making this part of the UART driver will allow UART to work on
device-tree boards as well and the mach code can eventually be removed.
Signed-off-by: David Lechner <david@xxxxxxxxxxxxxx>
---
drivers/tty/serial/8250/8250_of.c | 1 +
drivers/tty/serial/8250/8250_port.c | 22 ++++++++++++++++++++++
include/uapi/linux/serial_core.h | 3 ++-
include/uapi/linux/serial_reg.h | 8 ++++++++
4 files changed, 33 insertions(+), 1 deletion(-)
diff --git a/drivers/tty/serial/8250/8250_of.c b/drivers/tty/serial/8250/8250_of.c
index d25ab1c..5281252 100644
--- a/drivers/tty/serial/8250/8250_of.c
+++ b/drivers/tty/serial/8250/8250_of.c
@@ -332,6 +332,7 @@ static const struct of_device_id of_platform_serial_table[] = {
.data = (void *)PORT_ALTR_16550_F128, },
{ .compatible = "mrvl,mmp-uart",
.data = (void *)PORT_XSCALE, },
+ { .compatible = "ti,da830-uart", .data = (void *)PORT_DA830, },
{ /* end of list */ },
};
MODULE_DEVICE_TABLE(of, of_platform_serial_table);
diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index fe4399b..ea854054 100644
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -273,6 +273,15 @@ static const struct serial8250_config uart_config[] = {
.rxtrig_bytes = {1, 4, 8, 14},
.flags = UART_CAP_FIFO,
},
+ [PORT_DA830] = {
+ .name = "TI DA8xx/OMAPL13x/AM17xx/AM18xx",
+ .fifo_size = 16,
+ .tx_loadsz = 16,
+ .fcr = UART_FCR_DMA_SELECT | UART_FCR_ENABLE_FIFO |
+ UART_FCR_R_TRIG_10,
+ .rxtrig_bytes = {1, 4, 8, 14},
+ .flags = UART_CAP_FIFO | UART_CAP_AFE,
+ },
};