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fsi: Add fsi-master class

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This change adds a device class for FSI masters, allowing access under
/sys/class/fsi-master/, and easier udev rules.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Joel Stanley <joel@jms.id.au>
Acked-by: Alistair Popple <alistair@popple.id.au>
Link: https://lore.kernel.org/r/20191108051945.7109-2-joel@jms.id.au
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jeremy Kerr 2019-11-08 15:49:35 +10:30 committed by Greg Kroah-Hartman
parent 4180468e16
commit 2e32c2d675
1 changed files with 13 additions and 0 deletions
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13
drivers/fsi/fsi-core.c
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@ -1241,6 +1241,10 @@ static ssize_t master_break_store(struct device *dev,
static DEVICE_ATTR(break, 0200, NULL, master_break_store);
struct class fsi_master_class = {
.name = "fsi-master",
};
int fsi_master_register(struct fsi_master *master)
{
int rc;
@ -1249,6 +1253,7 @@ int fsi_master_register(struct fsi_master *master)
mutex_init(&master->scan_lock);
master->idx = ida_simple_get(&master_ida, 0, INT_MAX, GFP_KERNEL);
dev_set_name(&master->dev, "fsi%d", master->idx);
master->dev.class = &fsi_master_class;
rc = device_register(&master->dev);
if (rc) {
@ -1350,8 +1355,15 @@ static int __init fsi_init(void)
rc = bus_register(&fsi_bus_type);
if (rc)
goto fail_bus;
rc = class_register(&fsi_master_class);
if (rc)
goto fail_class;
return 0;
fail_class:
bus_unregister(&fsi_bus_type);
fail_bus:
unregister_chrdev_region(fsi_base_dev, FSI_CHAR_MAX_DEVICES);
return rc;
@ -1360,6 +1372,7 @@ postcore_initcall(fsi_init);
static void fsi_exit(void)
{
class_unregister(&fsi_master_class);
bus_unregister(&fsi_bus_type);
unregister_chrdev_region(fsi_base_dev, FSI_CHAR_MAX_DEVICES);
ida_destroy(&fsi_minor_ida);