static DEFINE_IDR(i3c_bus_idr);
static DEFINE_MUTEX(i3c_core_lock);
+static int __i3c_first_dynamic_bus_num;
/**
* i3c_bus_maintenance_lock - Lock the bus for a maintenance operation
mutex_unlock(&i3c_core_lock);
}
-static int i3c_bus_init(struct i3c_bus *i3cbus)
+static int i3c_bus_init(struct i3c_bus *i3cbus, struct device_node *np)
{
- int ret;
+ int ret, start, end, id = -1;
init_rwsem(&i3cbus->lock);
INIT_LIST_HEAD(&i3cbus->devs.i2c);
i3c_bus_init_addrslots(i3cbus);
i3cbus->mode = I3C_BUS_MODE_PURE;
+ if (np)
+ id = of_alias_get_id(np, "i3c");
+
mutex_lock(&i3c_core_lock);
- ret = idr_alloc(&i3c_bus_idr, i3cbus, 0, 0, GFP_KERNEL);
+ if (id >= 0) {
+ start = id;
+ end = start + 1;
+ } else {
+ start = __i3c_first_dynamic_bus_num;
+ end = 0;
+ }
+
+ ret = idr_alloc(&i3c_bus_idr, i3cbus, start, end, GFP_KERNEL);
mutex_unlock(&i3c_core_lock);
if (ret < 0)
INIT_LIST_HEAD(&master->boardinfo.i2c);
INIT_LIST_HEAD(&master->boardinfo.i3c);
- ret = i3c_bus_init(i3cbus);
+ ret = i3c_bus_init(i3cbus, master->dev.of_node);
if (ret)
return ret;
static int __init i3c_init(void)
{
- int res = bus_register_notifier(&i2c_bus_type, &i2cdev_notifier);
+ int res;
+
+ res = of_alias_get_highest_id("i3c");
+ if (res >= 0) {
+ mutex_lock(&i3c_core_lock);
+ __i3c_first_dynamic_bus_num = res + 1;
+ mutex_unlock(&i3c_core_lock);
+ }
+ res = bus_register_notifier(&i2c_bus_type, &i2cdev_notifier);
if (res)
return res;