[PATCH 1/2] tty: serial_core: Add name field to uart_port struct

[Vignesh R]

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 <vigne...@ti.com>
---
 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