brcm63xx: prevent usb clock state inconsistency on BCM6318

Return the same clock for usbh and usbd on BCM6318 to prevent the clock
getting disabled despite being supposed to be enabled, e.g. by the
following sequence:

	clk_enable(usbh); <- usbh->usage = 1, enabled
	clk_enable(usbd); <- usbd->usage = 1, enabled (no effect)
	clk_disable(usbd); <- usbd->usage = 0,  -> disabled!

Signed-off-by: Jonas Gorski <jogo@openwrt.org>

SVN-Revision: 39321

target/linux/brcm63xx/patches-3.10/346-MIPS-BCM63XX-USB-ENETSW-6318-clocks.patch

@@ -13,38 +13,44 @@
  		bcm_hwclock_set(CKCTL_6328_ROBOSW_EN, enable);
  	else if (BCMCPU_IS_6362())
  		bcm_hwclock_set(CKCTL_6362_ROBOSW_EN, enable);
-@@ -179,11 +183,22 @@ static struct clk clk_pcm = {
- };
- 
- /*
-+ * 6318 USB host & slave clock
-+ */
-+static void bcm_6318_usb_clock_set(int enable)
-+{
-+	bcm_hwclock_set(CKCTL_6318_USB_EN, enable);
-+	bcm_ub_hwclock_set(UB_CKCTL_6318_USB_EN, enable);
-+}
-+
-+/*
-  * USB host clock
+@@ -183,18 +187,22 @@ static struct clk clk_pcm = {
   */
  static void usbh_set(struct clk *clk, int enable)
  {
 -	if (BCMCPU_IS_6328())
-+	if (BCMCPU_IS_6318())
-+		bcm_6318_usb_clock_set(enable);
-+	else if (BCMCPU_IS_6328())
++	if (BCMCPU_IS_6318()) {
++		bcm_hwclock_set(CKCTL_6318_USB_EN, enable);
++		bcm_ub_hwclock_set(UB_CKCTL_6318_USB_EN, enable);
++	} else if (BCMCPU_IS_6328()) {
  		bcm_hwclock_set(CKCTL_6328_USBH_EN, enable);
- 	else if (BCMCPU_IS_6348())
+-	else if (BCMCPU_IS_6348())
++	} else if (BCMCPU_IS_6348()) {
  		bcm_hwclock_set(CKCTL_6348_USBH_EN, enable);
-@@ -209,7 +224,9 @@ static struct clk clk_usbh = {
-  */
- static void usbd_set(struct clk *clk, int enable)
- {
--	if (BCMCPU_IS_6328())
-+	if (BCMCPU_IS_6318())
-+		bcm_6318_usb_clock_set(enable);
-+	else if (BCMCPU_IS_6328())
- 		bcm_hwclock_set(CKCTL_6328_USBD_EN, enable);
- 	else if (BCMCPU_IS_6362())
- 		bcm_hwclock_set(CKCTL_6362_USBD_EN, enable);
+-	else if (BCMCPU_IS_6362())
++	} else if (BCMCPU_IS_6362()) {
+ 		bcm_hwclock_set(CKCTL_6362_USBH_EN, enable);
+-	else if (BCMCPU_IS_6368())
++	} else if (BCMCPU_IS_6368()) {
+ 		bcm_hwclock_set(CKCTL_6368_USBH_EN, enable);
+-	else if (BCMCPU_IS_63268())
++	} else if (BCMCPU_IS_63268()) {
+ 		bcm_hwclock_set(CKCTL_63268_USBH_EN, enable);
+-	else
++	} else {
+ 		return;
++	}
+ 
+ 	if (enable)
+ 		msleep(100);
+@@ -393,9 +401,9 @@ struct clk *clk_get(struct device *dev,
+ 		return &clk_enetsw;
+ 	if (!strcmp(id, "ephy"))
+ 		return &clk_ephy;
+-	if (!strcmp(id, "usbh"))
++	if (!strcmp(id, "usbh") || (BCMCPU_IS_6318() && !strcmp(id, "usbd")))
+ 		return &clk_usbh;
+-	if (!strcmp(id, "usbd"))
++	if (!strcmp(id, "usbd") && !BCMCPU_IS_6318())
+ 		return &clk_usbd;
+ 	if (!strcmp(id, "spi"))
+ 		return &clk_spi;