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brcm63xx: prevent usb clock state inconsistency on BCM6318

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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
This commit is contained in:
Jonas Gorski 2014-01-19 13:45:42 +00:00
parent b6e1cbd8dd
commit 52b7f55cb3
1 changed files with 35 additions and 29 deletions
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64
target/linux/brcm63xx/patches-3.10/346-MIPS-BCM63XX-USB-ENETSW-6318-clocks.patch
View file

@ -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;