Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / usb / phy / of.c

diff --git a/kernel/drivers/usb/phy/of.c b/kernel/drivers/usb/phy/of.c
new file mode 100644 (file)
index 0000000..66ffa82
--- /dev/null
+++ b/kernel/drivers/usb/phy/of.c
@@ -0,0 +1,47 @@
+/*
+ * USB of helper code
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/usb/of.h>
+#include <linux/usb/otg.h>
+
+static const char *const usbphy_modes[] = {
+       [USBPHY_INTERFACE_MODE_UNKNOWN] = "",
+       [USBPHY_INTERFACE_MODE_UTMI]    = "utmi",
+       [USBPHY_INTERFACE_MODE_UTMIW]   = "utmi_wide",
+       [USBPHY_INTERFACE_MODE_ULPI]    = "ulpi",
+       [USBPHY_INTERFACE_MODE_SERIAL]  = "serial",
+       [USBPHY_INTERFACE_MODE_HSIC]    = "hsic",
+};
+
+/**
+ * of_usb_get_phy_mode - Get phy mode for given device_node
+ * @np:        Pointer to the given device_node
+ *
+ * The function gets phy interface string from property 'phy_type',
+ * and returns the corresponding enum usb_phy_interface
+ */
+enum usb_phy_interface of_usb_get_phy_mode(struct device_node *np)
+{
+       const char *phy_type;
+       int err, i;
+
+       err = of_property_read_string(np, "phy_type", &phy_type);
+       if (err < 0)
+               return USBPHY_INTERFACE_MODE_UNKNOWN;
+
+       for (i = 0; i < ARRAY_SIZE(usbphy_modes); i++)
+               if (!strcmp(phy_type, usbphy_modes[i]))
+                       return i;
+
+       return USBPHY_INTERFACE_MODE_UNKNOWN;
+}
+EXPORT_SYMBOL_GPL(of_usb_get_phy_mode);