Clarify usb_powered() and fix some code.

Either by mistake or because its meaning changed, usb_powered() doesn't mean
what the name suggest, so clarify its meaning by renaming it to usb_powered_only.
So use of usb_powered() are replaced by usb_inserted() when it makes more sense.

Change-Id: I112887e2d8560e84587bee5f55c826dde8c806d8
Reviewed-on: http://gerrit.rockbox.org/1097
Reviewed-by: Amaury Pouly <amaury.pouly@gmail.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/apps/plugins/battery_bench.c b/apps/plugins/battery_bench.c
index b0976d5e10..289b399e27 100644
--- a/apps/plugins/battery_bench.c
+++ b/apps/plugins/battery_bench.c
@@ -358,11 +358,12 @@ static unsigned int charge_state(void)
         ret |= BIT_CHARGING;
 #endif
 #endif
+    /* USB insertion means nothing if USB cannot power the device */
 #ifdef HAVE_USB_POWER
-    if (rb->usb_powered())
+    if (rb->usb_inserted())
         ret |= BIT_USB_POWER;
 #endif
-    return ret; 
+    return ret;
 }
 #endif