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| author | Vignesh R <vigneshr@ti.com> | 2017-03-24 10:57:59 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-03-31 16:56:10 +0200 |
| commit | f7048b15900f36fe21398fba94777b8aab3b376d (patch) | |
| tree | 8e495d9054e4b9653beefc13e61b3a3156f17e43 | |
| parent | 7cd3e9dbdd4c0025d0e37c8c73a2ac8641fc55bc (diff) | |
| download | linux-f7048b15900f36fe21398fba94777b8aab3b376d.tar.bz2 | |
tty: serial_core: Add name field to uart_port struct
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@ti.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/tty/serial/serial_core.c | 7 | ||||
| -rw-r--r-- | include/linux/serial_core.h | 1 |
2 files changed, 8 insertions, 0 deletions
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index 0fb3f7cce62a..f5572e28d16a 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -2744,6 +2744,12 @@ 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; + uport->name = kasprintf(GFP_KERNEL, "%s%d", drv->dev_name, + drv->tty_driver->name_base + uport->line); + if (!uport->name) { + ret = -ENOMEM; + goto out; + } /* * If this port is a console, then the spinlock is already @@ -2861,6 +2867,7 @@ int uart_remove_one_port(struct uart_driver *drv, struct uart_port *uport) if (uport->type != PORT_UNKNOWN && uport->ops->release_port) uport->ops->release_port(uport); kfree(uport->tty_groups); + kfree(uport->name); /* * Indicate that there isn't a port here anymore. diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index 58484fb35cc8..60530678c633 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; /* 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; |