1 files changed, 82 insertions, 0 deletions
diff --git a/target/linux/at91/patches-3.18/200-ARM-at91-udc-clockfix-backport.patch b/target/linux/at91/patches-3.18/200-ARM-at91-udc-clockfix-backport.patch
new file mode 100644
index 0000000..32e1ac5
--- /dev/null
+++ b/target/linux/at91/patches-3.18/200-ARM-at91-udc-clockfix-backport.patch
@@ -0,0 +1,82 @@
+--- a/drivers/usb/gadget/udc/at91_udc.c
++++ b/drivers/usb/gadget/udc/at91_udc.c
+@@ -870,8 +870,6 @@ static void clk_on(struct at91_udc *udc)
+ 		return;
+ 	udc->clocked = 1;
+ 
+-	if (IS_ENABLED(CONFIG_COMMON_CLK))
+-		clk_enable(udc->uclk);
+ 	clk_enable(udc->iclk);
+ 	clk_enable(udc->fclk);
+ }
+@@ -884,8 +882,6 @@ static void clk_off(struct at91_udc *udc
+ 	udc->gadget.speed = USB_SPEED_UNKNOWN;
+ 	clk_disable(udc->fclk);
+ 	clk_disable(udc->iclk);
+-	if (IS_ENABLED(CONFIG_COMMON_CLK))
+-		clk_disable(udc->uclk);
+ }
+ 
+ /*
+@@ -1766,27 +1762,18 @@ static int at91udc_probe(struct platform
+ 	udc_reinit(udc);
+ 
+ 	/* get interface and function clocks */
+-	udc->iclk = clk_get(dev, "udc_clk");
+-	udc->fclk = clk_get(dev, "udpck");
+-	if (IS_ENABLED(CONFIG_COMMON_CLK))
+-		udc->uclk = clk_get(dev, "usb_clk");
+-	if (IS_ERR(udc->iclk) || IS_ERR(udc->fclk) ||
+-	    (IS_ENABLED(CONFIG_COMMON_CLK) && IS_ERR(udc->uclk))) {
++	udc->iclk = clk_get(dev, "pclk");
++	udc->fclk = clk_get(dev, "hclk");
++	if (IS_ERR(udc->iclk) || IS_ERR(udc->fclk)) {
+ 		DBG("clocks missing\n");
+ 		retval = -ENODEV;
+ 		goto fail1;
+ 	}
+ 
+-	/* don't do anything until we have both gadget driver and VBUS */
+-	if (IS_ENABLED(CONFIG_COMMON_CLK)) {
+-		clk_set_rate(udc->uclk, 48000000);
+-		retval = clk_prepare(udc->uclk);
+-		if (retval)
+-			goto fail1;
+-	}
++	clk_set_rate(udc->fclk, 48000000);
+ 	retval = clk_prepare(udc->fclk);
+ 	if (retval)
+-		goto fail1a;
++		goto fail1;
+ 
+ 	retval = clk_prepare_enable(udc->iclk);
+ 	if (retval)
+@@ -1860,12 +1847,7 @@ fail1c:
+ 	clk_unprepare(udc->iclk);
+ fail1b:
+ 	clk_unprepare(udc->fclk);
+-fail1a:
+-	if (IS_ENABLED(CONFIG_COMMON_CLK))
+-		clk_unprepare(udc->uclk);
+ fail1:
+-	if (IS_ENABLED(CONFIG_COMMON_CLK) && !IS_ERR(udc->uclk))
+-		clk_put(udc->uclk);
+ 	if (!IS_ERR(udc->fclk))
+ 		clk_put(udc->fclk);
+ 	if (!IS_ERR(udc->iclk))
+@@ -1911,15 +1893,11 @@ static int __exit at91udc_remove(struct
+ 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ 	release_mem_region(res->start, resource_size(res));
+ 
+-	if (IS_ENABLED(CONFIG_COMMON_CLK))
+-		clk_unprepare(udc->uclk);
+ 	clk_unprepare(udc->fclk);
+ 	clk_unprepare(udc->iclk);
+ 
+ 	clk_put(udc->iclk);
+ 	clk_put(udc->fclk);
+-	if (IS_ENABLED(CONFIG_COMMON_CLK))
+-		clk_put(udc->uclk);
+ 
+ 	return 0;
+ }