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auxdisplay: ks0108: use new parport device model

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Modify auxdisplay driver to use the new parallel port device model.

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sudip Mukherjee 2015-07-20 17:27:24 +05:30 committed by Greg Kroah-Hartman
parent c9efdbe634
commit 4edd70c133
1 changed files with 53 additions and 35 deletions
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88
drivers/auxdisplay/ks0108.c
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@ -125,51 +125,69 @@ unsigned char ks0108_isinited(void)
}
EXPORT_SYMBOL_GPL(ks0108_isinited);
static void ks0108_parport_attach(struct parport *port)
{
struct pardev_cb ks0108_cb;
if (port->base != ks0108_port)
return;
memset(&ks0108_cb, 0, sizeof(ks0108_cb));
ks0108_cb.flags = PARPORT_DEV_EXCL;
ks0108_pardevice = parport_register_dev_model(port, KS0108_NAME,
&ks0108_cb, 0);
if (!ks0108_pardevice) {
pr_err("ERROR: parport didn't register new device\n");
return;
}
if (parport_claim(ks0108_pardevice)) {
pr_err("could not claim access to parport %i. Aborting.\n",
ks0108_port);
goto err_unreg_device;
}
ks0108_inited = 1;
return;
err_unreg_device:
parport_unregister_device(ks0108_pardevice);
ks0108_pardevice = NULL;
}
static void ks0108_parport_detach(struct parport *port)
{
if (port->base != ks0108_port)
return;
if (!ks0108_pardevice) {
pr_err("%s: already unregistered.\n", KS0108_NAME);
return;
}
parport_release(ks0108_pardevice);
parport_unregister_device(ks0108_pardevice);
ks0108_pardevice = NULL;
}
/*
* Module Init & Exit
*/
static struct parport_driver ks0108_parport_driver = {
.name = "ks0108",
.match_port = ks0108_parport_attach,
.detach = ks0108_parport_detach,
.devmodel = true,
};
static int __init ks0108_init(void)
{
int result;
int ret = -EINVAL;
ks0108_parport = parport_find_base(ks0108_port);
if (ks0108_parport == NULL) {
pr_err("ERROR: parport didn't find %i port\n", ks0108_port);
goto none;
}
ks0108_pardevice = parport_register_device(ks0108_parport, KS0108_NAME,
NULL, NULL, NULL, PARPORT_DEV_EXCL, NULL);
parport_put_port(ks0108_parport);
if (ks0108_pardevice == NULL) {
pr_err("ERROR: parport didn't register new device\n");
goto none;
}
result = parport_claim(ks0108_pardevice);
if (result != 0) {
pr_err("ERROR: can't claim %i parport, maybe in use\n",
ks0108_port);
ret = result;
goto registered;
}
ks0108_inited = 1;
return 0;
registered:
parport_unregister_device(ks0108_pardevice);
none:
return ret;
return parport_register_driver(&ks0108_parport_driver);
}
static void __exit ks0108_exit(void)
{
parport_release(ks0108_pardevice);
parport_unregister_device(ks0108_pardevice);
parport_unregister_driver(&ks0108_parport_driver);
}
module_init(ks0108_init);