[PATCH v2 01/11] fsi: Add fsi-master class

Joel Stanley
2019-11-08T05:20:06Z

From: Jeremy Kerr <jk@ozlabs.org>

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>
---
drivers/fsi/fsi-core.c | 13 +++++++++++++
1 file changed, 13 insertions(+)

diff --git a/drivers/fsi/fsi-core.c b/drivers/fsi/fsi-core.c
index 1f76740f33b6..0861f6097b33 100644
--- a/drivers/fsi/fsi-core.c
+++ b/drivers/fsi/fsi-core.c
@@ -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);
--
2.24.0.rc1