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<p>I have written a simple UART serial driver in embedded Linux running busybox with mdev rules. I have provided <code>.dev_name</code> as "<code>ttyC2C</code>" in my driver code.</p>
<pre><code>static struct uart_driver serial_omap_reg = {
.owner = THIS_MODULE,
.driver_name = "Omap-C2C-Serial",
.dev_name = "ttyC2C",
.nr = OMAP_MAX_HSUART_PORTS,
.cons = NULL,
};
</code></pre>
<p>However the node is getting created in</p>
<pre><code>./sys/devices/platform/omap_c2c_uart.0/tty/ttyC2C0
./sys/class/tty/ttyC2C0
/ # ls -l ./sys/class/tty/ttyC2C0
lrwxrwxrwx 1 root 0 0 Jan 1 00:14 ./sys/class/tty/ttyC2C0 -> ../../devices/platform/omap_c2c_uart.0/tty/ttyC2C0
/ # ls -l ./sys/devices/platform/omap_c2c_uart.0/tty/ttyC2C0
-r--r--r-- 1 root 0 4096 Jan 1 00:14 dev
lrwxrwxrwx 1 root 0 0 Jan 1 00:14 device -> ../../../omap_c2c_uart.0
drwxr-xr-x 2 root 0 0 Jan 1 00:14 power
lrwxrwxrwx 1 root 0 0 Jan 1 00:14 subsystem -> ../../../../../class/tty
-rw-r--r-- 1 root 0 4096 Jan 1 00:14 uevent
/ #
</code></pre>
<p>The mdev rules for tty are:</p>
<pre><code>tty 0:5 0666
tty.* 0:0 0620
</code></pre>
<p>How to get device node as <code>/dev/ttyC2C</code> ?</p>
</div>-- <br>Manavendra Nath Manav<br>