Introduce a field to store name of uart_port that can be used to easily
identify uart port instances on a system that has more than one uart
instance. The name is of the form ttyXN(eg. ttyS0, ttyAMA0,..) where N
is number that particular uart instance.
This field will be useful when printing debug info for a particular port
or in register irqs with unique irq name. Port name is populated during
uart_add_one_port().
Signed-off-by: Vignesh R <vigneshr@xxxxxx>
---
drivers/tty/serial/serial_core.c | 2 ++
include/linux/serial_core.h | 1 +
2 files changed, 3 insertions(+)
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 0fb3f7cce62a..8b0fff74b190 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -2744,6 +2744,8 @@ int uart_add_one_port(struct uart_driver *drv, struct uart_port *uport)
state->pm_state = UART_PM_STATE_UNDEFINED;
uport->cons = drv->cons;
uport->minor = drv->tty_driver->minor_start + uport->line;
+ snprintf(uport->name, sizeof(uport->name), "%s%d", drv->dev_name,
+ drv->tty_driver->name_base + uport->line);
/*
* If this port is a console, then the spinlock is already
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index 58484fb35cc8..821f97ce3ae2 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -247,6 +247,7 @@ struct uart_port {
unsigned char suspended;
unsigned char irq_wake;
unsigned char unused[2];
+ char name[20]; /* port name */
struct attribute_group *attr_group; /* port specific attributes */
const struct attribute_group **tty_groups; /* all attributes (serial core use only) */
struct serial_rs485 rs485;
--
2.11.0
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