by Hi all,
Here's a small patch against 2.5.52 that adds the start of tty class
support to the kernel. It also enables the usb-serial drivers to use
this class. With this patch, the /sys/class/tty directory looks like
the following on my machine (with 1 4 port usb-to-serial device plugged
in):
/sys/class/tty/
|-- devices
| |-- 12 -> ../../../devices/pci0/00:1e.0/01:0d.1/usb3/3-1/ttyUSB0
| |-- 13 -> ../../../devices/pci0/00:1e.0/01:0d.1/usb3/3-1/ttyUSB1
| |-- 14 -> ../../../devices/pci0/00:1e.0/01:0d.1/usb3/3-1/ttyUSB2
| `-- 15 -> ../../../devices/pci0/00:1e.0/01:0d.1/usb3/3-1/ttyUSB3
`-- drivers
|-- usb-serial:clie_3.5 -> ../../../bus/usb-serial/drivers/clie_3.5
|-- usb-serial:edgeport_1 -> ../../../bus/usb-serial/drivers/edgeport_1
|-- usb-serial:edgeport_2 -> ../../../bus/usb-serial/drivers/edgeport_2
|-- usb-serial:edgeport_4 -> ../../../bus/usb-serial/drivers/edgeport_4
|-- usb-serial:edgeport_8 -> ../../../bus/usb-serial/drivers/edgeport_8
|-- usb-serial:generic -> ../../../bus/usb-serial/drivers/generic
|-- usb-serial:visor -> ../../../bus/usb-serial/drivers/visor
|-- usb-serial:whiteheat -> ../../../bus/usb-serial/drivers/whiteheat
`-- usb-serial:whiteheatnofirm -> ../../../bus/usb-serial/drivers/whiteheatnofirm
If no one has any problems with the patch, I'll send it on to Linus in a
few days.
thanks,
greg k-h
diff -Nru a/drivers/char/tty_io.c b/drivers/char/tty_io.c
--- a/drivers/char/tty_io.c Mon Dec 23 17:14:36 2002
#include <linux/init.h>
#include <linux/module.h>
#include <linux/smp_lock.h>
+#include <linux/device.h>
#include <asm/uaccess.h>
extern int vty_init(void);
#endif
+struct device_class tty_devclass = {
+ .name = "tty",
+};
+EXPORT_SYMBOL(tty_devclass);
+
/*
* Ok, now we can initialize the rest of the tty devices and can count
* on memory allocations, interrupts etc..
*/
void __init tty_init(void)
{
+ devclass_register(&tty_devclass);
+
/*
* dev_tty_driver and dev_console_driver are actually magic
* devices which get redirected at open time. Nevertheless,
diff -Nru a/drivers/usb/serial/bus.c b/drivers/usb/serial/bus.c
--- a/drivers/usb/serial/bus.c Mon Dec 23 17:14:36 2002
device->driver.bus = &usb_serial_bus_type;
device->driver.probe = usb_serial_device_probe;
device->driver.remove = usb_serial_device_remove;
+ device->driver.devclass = &tty_devclass;
retval = driver_register(&device->driver);
diff -Nru a/include/linux/tty_driver.h b/include/linux/tty_driver.h
--- a/include/linux/tty_driver.h Mon Dec 23 17:14:36 2002
#define SERIAL_TYPE_NORMAL 1
#define SERIAL_TYPE_CALLOUT 2
+extern struct device_class tty_devclass;
+
#endif /* #ifdef _LINUX_TTY_DRIVER_H */
-
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