linux-kernel - [PATCH 1/2] base: soc: populate machine name in soc_device

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Date:   Fri, 17 Mar 2023 13:36:18 +0100
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Kevin Hilman <khilman@...libre.com>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "open list:ARM/Amlogic Meson..." <linux-amlogic@...ts.infradead.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: [PATCH 1/2] 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@...il.com>
---
 drivers/base/soc.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/base/soc.c b/drivers/base/soc.c
index 0fb1d4ab9..8dec5228f 100644
--- 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);
-- 
2.39.2