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authorYong Wu <yong.wu@mediatek.com>2022-02-14 09:07:57 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2022-02-25 14:16:12 +0300
commit2502960fba7e94e090112069694365295c32ccc5 (patch)
treea2b68a46e1c3b115f90f1e99ff543333d102eb75 /drivers/base/component.c
parent36744c117ab4e3d7e114c10d66882c418ba6ea8a (diff)
downloadlinux-2502960fba7e94e090112069694365295c32ccc5.tar.xz
component: Add common helper for compare/release functions
The component requires the compare/release functions, there are so many copies in current kernel. Just define four common helpers for them. Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: "Rafael J. Wysocki" <rafael@kernel.org> Signed-off-by: Yong Wu <yong.wu@mediatek.com> Link: https://lore.kernel.org/r/20220214060819.7334-2-yong.wu@mediatek.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/base/component.c')
-rw-r--r--drivers/base/component.c58
1 files changed, 58 insertions, 0 deletions
diff --git a/drivers/base/component.c b/drivers/base/component.c
index 34f9e0802719..5eadeac6c532 100644
--- a/drivers/base/component.c
+++ b/drivers/base/component.c
@@ -6,6 +6,7 @@
#include <linux/device.h>
#include <linux/list.h>
#include <linux/mutex.h>
+#include <linux/of.h>
#include <linux/slab.h>
#include <linux/debugfs.h>
@@ -283,6 +284,63 @@ static void take_down_aggregate_device(struct aggregate_device *adev)
}
}
+/**
+ * component_compare_of - A common component compare function for of_node
+ * @dev: component device
+ * @data: @compare_data from component_match_add_release()
+ *
+ * A common compare function when compare_data is device of_node. e.g.
+ * component_match_add_release(masterdev, &match, component_release_of,
+ * component_compare_of, component_dev_of_node)
+ */
+int component_compare_of(struct device *dev, void *data)
+{
+ return device_match_of_node(dev, data);
+}
+EXPORT_SYMBOL_GPL(component_compare_of);
+
+/**
+ * component_release_of - A common component release function for of_node
+ * @dev: component device
+ * @data: @compare_data from component_match_add_release()
+ *
+ * About the example, Please see component_compare_of().
+ */
+void component_release_of(struct device *dev, void *data)
+{
+ of_node_put(data);
+}
+EXPORT_SYMBOL_GPL(component_release_of);
+
+/**
+ * component_compare_dev - A common component compare function for dev
+ * @dev: component device
+ * @data: @compare_data from component_match_add_release()
+ *
+ * A common compare function when compare_data is struce device. e.g.
+ * component_match_add(masterdev, &match, component_compare_dev, component_dev)
+ */
+int component_compare_dev(struct device *dev, void *data)
+{
+ return dev == data;
+}
+EXPORT_SYMBOL_GPL(component_compare_dev);
+
+/**
+ * component_compare_dev_name - A common component compare function for device name
+ * @dev: component device
+ * @data: @compare_data from component_match_add_release()
+ *
+ * A common compare function when compare_data is device name string. e.g.
+ * component_match_add(masterdev, &match, component_compare_dev_name,
+ * "component_dev_name")
+ */
+int component_compare_dev_name(struct device *dev, void *data)
+{
+ return device_match_name(dev, data);
+}
+EXPORT_SYMBOL_GPL(component_compare_dev_name);
+
static void devm_component_match_release(struct device *parent, void *res)
{
struct component_match *match = res;