[PATCH v4 2/3] i3c: master: add i3c_for_each_dev helper

[Sam Agazaryan <samagazaryan@google.com>]

From: Vitor Soares <vitor.soares@toradex.com>

Introduce i3c_for_each_dev(), an i3c device iterator for use by i3cdev.

Signed-off-by: Vitor Soares <vitor.soares@toradex.com>
Signed-off-by: Sam Agazaryan <samagazaryan@google.com>
---
 drivers/i3c/internals.h |  2 ++
 drivers/i3c/master.c    | 12 ++++++++++++
 2 files changed, 14 insertions(+)

diff --git a/drivers/i3c/internals.h b/drivers/i3c/internals.h
index cbc00c862104..3c53a5108b81 100644
--- a/drivers/i3c/internals.h
+++ b/drivers/i3c/internals.h
@@ -79,4 +79,6 @@ static inline struct i3c_master_controller *i3c_bus_to_i3c_master(struct i3c_bus
 	return container_of(i3cbus, struct i3c_master_controller, bus);
 }
 
+int i3c_for_each_dev(void *data, int (*fn)(struct device *, void *));
+
 #endif /* I3C_INTERNAL_H */
diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c
index e8a9f8c3041e..dd5071ca9195 100644
--- a/drivers/i3c/master.c
+++ b/drivers/i3c/master.c
@@ -4011,6 +4011,18 @@ void i3c_dev_free_ibi_locked(struct i3c_dev_desc *dev)
 }
 EXPORT_SYMBOL_GPL(i3c_dev_free_ibi_locked);
 
+int i3c_for_each_dev(void *data, int (*fn)(struct device *, void *))
+{
+	int res;
+
+	mutex_lock(&i3c_core_lock);
+	res = bus_for_each_dev(&i3c_bus_type, NULL, data, fn);
+	mutex_unlock(&i3c_core_lock);
+
+	return res;
+}
+EXPORT_SYMBOL_GPL(i3c_for_each_dev);
+
 static int __init i3c_init(void)
 {
 	int res;
-- 
2.55.0.979.g7e5102b832-goog