base: soc: populate machine name in soc_device_register if empty

Several SoC drivers use the same of-based mechanism to populate the machine
name. Therefore move this to the core and try to populate the machine name
in soc_device_register if it's not set yet.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Acked-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Link: https://lore.kernel.org/r/6dbdf458-9f46-613e-de58-b4a56a6cdd9f@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/base/soc.c b/drivers/base/soc.c
index 0fb1d4a..8dec522 100644 (file)
--- a/drivers/base/soc.c
+++ b/drivers/base/soc.c
@@ -7,6 +7,7 @@
 
 #include <linux/sysfs.h>
 #include <linux/init.h>
+#include <linux/of.h>
 #include <linux/stat.h>
 #include <linux/slab.h>
 #include <linux/idr.h>
@@ -110,6 +111,18 @@ static void soc_release(struct device *dev)
        kfree(soc_dev);
 }
 
+static void soc_device_get_machine(struct soc_device_attribute *soc_dev_attr)
+{
+       struct device_node *np;
+
+       if (soc_dev_attr->machine)
+               return;
+
+       np = of_find_node_by_path("/");
+       of_property_read_string(np, "model", &soc_dev_attr->machine);
+       of_node_put(np);
+}
+
 static struct soc_device_attribute *early_soc_dev_attr;
 
 struct soc_device *soc_device_register(struct soc_device_attribute *soc_dev_attr)
@@ -118,6 +131,8 @@ 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);
+
        if (!soc_bus_registered) {
                if (early_soc_dev_attr)
                        return ERR_PTR(-EBUSY);