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

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The 5+4 magic for HS tries to aim 32ms which is also what is intended
with 1 << 5 for FS. This little macro should make this easier to
understand.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Sebastian Andrzej Siewior 2012-10-22 22:14:57 +02:00 • committed by Felipe Balbi
parent fad8deb274
commit bcb2f99c6c
5 changed files with 16 additions and 15 deletions
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2
include/linux/usb/composite.h
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@ -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;
/**