[PATCH v2 4/9] base: soc: rename and export soc_device_get_machine()

[Bartosz Golaszewski]

Some SoC drivers reimplement the functionality of
soc_device_get_machine(). Make this function accessible through the
sys_soc.h header and rename it to a more descriptive name.

Reviewed-by: Christophe Leroy (CS GROUP) <chleroy@xxxxxxxxxx>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxxxxxxxx>
---
 drivers/base/soc.c      | 13 +++++--------
 include/linux/sys_soc.h | 10 ++++++++++
 2 files changed, 15 insertions(+), 8 deletions(-)

diff --git a/drivers/base/soc.c b/drivers/base/soc.c
index 48e2f0dbd330b8d402135ffa7308f454eb4ab7a5..65ce72d49230360c22a812cb9286e7fb4de0baf2 100644
--- a/drivers/base/soc.c
+++ b/drivers/base/soc.c
@@ -111,17 +111,14 @@ static void soc_release(struct device *dev)
 	kfree(soc_dev);
 }
 
-static void soc_device_get_machine(struct soc_device_attribute *soc_dev_attr)
+int soc_attr_read_machine(struct soc_device_attribute *soc_dev_attr)
 {
-	struct device_node *np;
-
 	if (soc_dev_attr->machine)
-		return;
+		return -EBUSY;
 
-	np = of_find_node_by_path("/");
-	of_property_read_string(np, "model", &soc_dev_attr->machine);
-	of_node_put(np);
+	return of_machine_read_model(&soc_dev_attr->machine);
 }
+EXPORT_SYMBOL_GPL(soc_attr_read_machine);
 
 static struct soc_device_attribute *early_soc_dev_attr;
 
@@ -131,7 +128,7 @@ struct soc_device *soc_device_register(struct soc_device_attribute *soc_dev_attr
 	const struct attribute_group **soc_attr_groups;
 	int ret;
 
-	soc_device_get_machine(soc_dev_attr);
+	soc_attr_read_machine(soc_dev_attr);
 
 	if (!soc_bus_registered) {
 		if (early_soc_dev_attr)
diff --git a/include/linux/sys_soc.h b/include/linux/sys_soc.h
index d9b3cf0f410c8cfb509a4c1a4d6c83fde6fe33c6..f19f5cec18e28461fef57f22702d2c44a41e4193 100644
--- a/include/linux/sys_soc.h
+++ b/include/linux/sys_soc.h
@@ -37,6 +37,16 @@ void soc_device_unregister(struct soc_device *soc_dev);
  */
 struct device *soc_device_to_device(struct soc_device *soc);
 
+/**
+ * soc_attr_read_machine - retrieve the machine model and store it in
+ *                         the soc_device_attribute structure
+ * @soc_dev_attr: SoC attribute structure to store the model in
+ *
+ * Returns:
+ * 0 on success, negative error number on failure.
+ */
+int soc_attr_read_machine(struct soc_device_attribute *soc_dev_attr);
+
 #ifdef CONFIG_SOC_BUS
 const struct soc_device_attribute *soc_device_match(
 	const struct soc_device_attribute *matches);

-- 
2.47.3