of: provide of_machine_read_model()

Provide a helper function allowing users to read the model string of the
machine, hiding the access to the root node.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20260223-soc-of-root-v2-2-b45da45903c8@oss.qualcomm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/of/base.c b/drivers/of/base.c
index b70aec32e0e35ee232b413e548742491bf763df7..bf4a51887d7422f5b8bfc63c7b20674bf03d800e 100644 (file)
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -449,6 +449,19 @@ int of_machine_read_compatible(const char **compatible, unsigned int index)
 }
 EXPORT_SYMBOL_GPL(of_machine_read_compatible);
 
+/**
+ * of_machine_read_model - Get the model string of this machine
+ * @model: address at which the address of the model string will be stored
+ *
+ * Returns:
+ * 0 on success, negative error number on failure.
+ */
+int of_machine_read_model(const char **model)
+{
+       return of_property_read_string(of_root, "model", model);
+}
+EXPORT_SYMBOL_GPL(of_machine_read_model);
+
 /**
  * of_machine_device_match - Test root of device tree against a of_device_id array
  * @matches:   NULL terminated array of of_device_id match structures to search in

diff --git a/include/linux/of.h b/include/linux/of.h
index 7df971d52b556f21b510a8b5ebfc8df49a2a6f64..2b95777f16f6ea1fb1e4bd0d9902cc2640d14795 100644 (file)
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -427,6 +427,7 @@ static inline bool of_machine_is_compatible(const char *compat)
 }
 
 int of_machine_read_compatible(const char **compatible, unsigned int index);
+int of_machine_read_model(const char **model);
 
 extern int of_add_property(struct device_node *np, struct property *prop);
 extern int of_remove_property(struct device_node *np, struct property *prop);
@@ -859,6 +860,11 @@ static inline int of_machine_read_compatible(const char **compatible,
        return -ENOSYS;
 }
 
+static inline int of_machine_read_model(const char **model)
+{
+       return -ENOSYS;
+}
+
 static inline int of_add_property(struct device_node *np, struct property *prop)
 {
        return 0;