usb: gadget: use a computation macro for INT endpoint interval

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / linux / usb / composite.h

diff --git a/include/linux/usb/composite.h b/include/linux/usb/composite.h
index f8dda0621800db910be2aa51f134a5139daf0243..8634a127bdd3a14a5808875534318104c1d00e50 100644 (file)
--- a/include/linux/usb/composite.h
+++ b/include/linux/usb/composite.h
@@ -38,6 +38,7 @@
 #include <linux/version.h>
 #include <linux/usb/ch9.h>
 #include <linux/usb/gadget.h>
+#include <linux/log2.h>
 
 /*
  * USB function drivers should return USB_GADGET_DELAYED_STATUS if they
@@ -51,6 +52,7 @@
 /* big enough to hold our biggest descriptor */
 #define USB_COMP_EP0_BUFSIZ    1024
 
+#define USB_MS_TO_HS_INTERVAL(x)       (ilog2((x * 1000 / 125)) + 1)
 struct usb_configuration;
 
 /**