usb: musb: core: added helper function for parsing DT

This adds the function musb_get_mode() to get the DT property "dr_mode"

Signed-off-by: Petr Kulhavy <petr@barix.com>
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Alexandre Bailon <abailon@baylibre.com>
Tested-by: David Lechner <david@lechnology.com>
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index a5ead84d68d13f7e906632233a52dafe9afd4317..a109f22fefcd14a3caf499abfe6087b49c999c1f 100644 (file)
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -100,6 +100,7 @@
 #include <linux/io.h>
 #include <linux/dma-mapping.h>
 #include <linux/usb.h>
+#include <linux/usb/of.h>
 
 #include "musb_core.h"
 #include "musb_trace.h"
@@ -130,6 +131,24 @@ static inline struct musb *dev_to_musb(struct device *dev)
        return dev_get_drvdata(dev);
 }
 
+enum musb_mode musb_get_mode(struct device *dev)
+{
+       enum usb_dr_mode mode;
+
+       mode = usb_get_dr_mode(dev);
+       switch (mode) {
+       case USB_DR_MODE_HOST:
+               return MUSB_HOST;
+       case USB_DR_MODE_PERIPHERAL:
+               return MUSB_PERIPHERAL;
+       case USB_DR_MODE_OTG:
+       case USB_DR_MODE_UNKNOWN:
+       default:
+               return MUSB_OTG;
+       }
+}
+EXPORT_SYMBOL_GPL(musb_get_mode);
+
 /*-------------------------------------------------------------------------*/
 
 #ifndef CONFIG_BLACKFIN

diff --git a/drivers/usb/musb/musb_core.h b/drivers/usb/musb/musb_core.h
index 2cb88a498f8a5681265654e079456e0ae944667e..76f00f61b874ad8a978f53007fb9eb078ad420b0 100644 (file)
--- a/drivers/usb/musb/musb_core.h
+++ b/drivers/usb/musb/musb_core.h
@@ -617,4 +617,10 @@ static inline void musb_platform_post_root_reset_end(struct musb *musb)
                musb->ops->post_root_reset_end(musb);
 }
 
+/*
+ * gets the "dr_mode" property from DT and converts it into musb_mode
+ * if the property is not found or not recognized returns MUSB_OTG
+ */
+extern enum musb_mode musb_get_mode(struct device *dev);
+
 #endif /* __MUSB_CORE_H__ */