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path: root/drivers/usb/musb/musb_am335x.c
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Diffstat (limited to 'drivers/usb/musb/musb_am335x.c')
-rw-r--r--drivers/usb/musb/musb_am335x.c55
1 files changed, 55 insertions, 0 deletions
diff --git a/drivers/usb/musb/musb_am335x.c b/drivers/usb/musb/musb_am335x.c
new file mode 100644
index 0000000..41ac5b5
--- /dev/null
+++ b/drivers/usb/musb/musb_am335x.c
@@ -0,0 +1,55 @@
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+
+static int am335x_child_probe(struct platform_device *pdev)
+{
+ int ret;
+
+ pm_runtime_enable(&pdev->dev);
+
+ ret = of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);
+ if (ret)
+ goto err;
+
+ return 0;
+err:
+ pm_runtime_disable(&pdev->dev);
+ return ret;
+}
+
+static int of_remove_populated_child(struct device *dev, void *d)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+
+ of_device_unregister(pdev);
+ return 0;
+}
+
+static int am335x_child_remove(struct platform_device *pdev)
+{
+ device_for_each_child(&pdev->dev, NULL, of_remove_populated_child);
+ pm_runtime_disable(&pdev->dev);
+ return 0;
+}
+
+static const struct of_device_id am335x_child_of_match[] = {
+ { .compatible = "ti,am33xx-usb" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, am335x_child_of_match);
+
+static struct platform_driver am335x_child_driver = {
+ .probe = am335x_child_probe,
+ .remove = am335x_child_remove,
+ .driver = {
+ .name = "am335x-usb-childs",
+ .of_match_table = of_match_ptr(am335x_child_of_match),
+ },
+};
+
+module_platform_driver(am335x_child_driver);
+MODULE_DESCRIPTION("AM33xx child devices");
+MODULE_LICENSE("GPL v2");