From 373594fb4b8bafb77d93a3ef6e678006f9e25fd3 Mon Sep 17 00:00:00 2001
From: John Crispin <john@openwrt.org>
Date: Tue, 19 Jan 2016 10:15:04 +0000
Subject: at91: add 4.4 support

This puts the existing patches and config in a 3.18 folder and introduces
a 4.4 config and patches.
The USB clock fix patch is no longer necessary, and the patches applying
to non DT boards has been dropped as the platform has been converted.
4.4 config was generated by copying 3.18 and running make kernel_menuconfig,
scripts/kconfig.pl filled in the gaps.

Signed-off-by: Ben Whitten <ben.whitten@gmail.com>

SVN-Revision: 48349
---
 .../200-ARM-at91-udc-clockfix-backport.patch       | 82 ++++++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 target/linux/at91/patches-3.18/200-ARM-at91-udc-clockfix-backport.patch

(limited to 'target/linux/at91/patches-3.18/200-ARM-at91-udc-clockfix-backport.patch')

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;
+ }
-- 
cgit v1.1