USB: musb: allow the Blackfin vrsel gpio to be active low

Rather than hardcoding the gpio levels for vrsel, allow the platform
resources to handle this so boards can be active high or low.
Signed-off-by: NCliff Cai <cliff.cai@analog.com>
Signed-off-by: NMike Frysinger <vapier@gentoo.org>
Signed-off-by: NFelipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/usb/musb/blackfin.c

@@ -238,10 +238,10 @@ static void bfin_vbus_power(struct musb *musb, int is_on, int sleeping)
 
 static void bfin_set_vbus(struct musb *musb, int is_on)
 {
-	if (is_on)
-		gpio_set_value(musb->config->gpio_vrsel, 1);
-	else
-		gpio_set_value(musb->config->gpio_vrsel, 0);
+	int value = musb->config->gpio_vrsel_active;
+	if (!is_on)
+		value = !value;
+	gpio_set_value(musb->config->gpio_vrsel, value);
 
 	DBG(1, "VBUS %s, devctl %02x "
 		/* otg %3x conf %08x prcm %08x */ "\n",

include/linux/usb/musb.h

@@ -88,6 +88,7 @@ struct musb_hdrc_config {
 #ifdef CONFIG_BLACKFIN
         /* A GPIO controlling VRSEL in Blackfin */
         unsigned int    gpio_vrsel;
+	unsigned int	gpio_vrsel_active;
 #endif
 
 };