ipq806x: Add support for linux-4.4

1)Changes

- Rebased the patches for linux-4.4.7
- Added patch to fix spi nor fifo and dma support
- Added patch to configure watchdog barktime

2)Testing

Tested on IPQ AP148 Board:
 a. NOR boot and NAND boot
 b. ethernet network and ath10k wifi
 c. ubi sysupgrade

UnTested
 dwc3 usb has not been validated on IPQ board(AP148)

3)Known Issues:
 Once we flash ubi image on AP148, and if we reset the board, uboot on
 first boot creates PEB and LEB for dynamic sized partitions, which is incorrect
 and not what linux expects which causes errors when trying to mount rootfs.
 In order to test this, we can use the below steps:
  a. Flash the ubi image on board and don't reset the board
  b. load the kernel fit image in RAM and boot from there.

Signed-off-by: Ram Chandra Jangir <rjangi@codeaurora.org>

1 files changed, 0 insertions, 170 deletions

diff --git a/target/linux/ipq806x/patches-3.18/136-clk-Add-safe-switch-hook.patch b/target/linux/ipq806x/patches-3.18/136-clk-Add-safe-switch-hook.patch
deleted file mode 100644
index 227f8cea05..0000000000
--- a/target/linux/ipq806x/patches-3.18/136-clk-Add-safe-switch-hook.patch
+++ /dev/null
@@ -1,170 +0,0 @@
-Content-Type: text/plain; charset="utf-8"
-MIME-Version: 1.0
-Content-Transfer-Encoding: 7bit
-Subject: [v3,04/13] clk: Add safe switch hook
-From: Stephen Boyd <sboyd@codeaurora.org>
-X-Patchwork-Id: 6063211
-Message-Id: <1426920332-9340-5-git-send-email-sboyd@codeaurora.org>
-To: Mike Turquette <mturquette@linaro.org>, Stephen Boyd <sboyd@codeaurora.org>
-Cc: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
-	linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
-	Viresh Kumar <viresh.kumar@linaro.org>
-Date: Fri, 20 Mar 2015 23:45:23 -0700
-
-Sometimes clocks can't accept their parent source turning off
-while the source is reprogrammed to a different rate. Most
-notably CPU clocks require a way to switch away from the current
-PLL they're running on, reprogram that PLL to a new rate, and
-then switch back to the PLL with the new rate once they're done.
-Add a hook that drivers can implement allowing them to return a
-'safe parent' that they can switch their parent to while the
-upstream source is reprogrammed to support this.
-
-Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
-
----
-This patch is good enough for Krait, but soon I'll need to 
-support a "safe rate" where we ask a clock what rate it needs to be running
-at to be sure it's within voltage constraints. Right now safe parent
-handles that problem on Krait, but on other platforms it won't work.
-
- drivers/clk/clk.c            | 61 ++++++++++++++++++++++++++++++++++++++------
- include/linux/clk-provider.h |  1 +
- 2 files changed, 54 insertions(+), 8 deletions(-)
-
---- a/drivers/clk/clk.c
-+++ b/drivers/clk/clk.c
-@@ -1350,7 +1350,8 @@ out:
- static void clk_calc_subtree(struct clk *clk, unsigned long new_rate,
- 			     struct clk *new_parent, u8 p_index)
- {
--	struct clk *child;
-+	struct clk *child, *parent;
-+	struct clk_hw *parent_hw;
- 
- 	clk->new_rate = new_rate;
- 	clk->new_parent = new_parent;
-@@ -1360,6 +1361,18 @@ static void clk_calc_subtree(struct clk
- 	if (new_parent && new_parent != clk->parent)
- 		new_parent->new_child = clk;
- 
-+	if (clk->ops->get_safe_parent) {
-+		parent_hw = clk->ops->get_safe_parent(clk->hw);
-+		if (parent_hw) {
-+			parent = parent_hw->clk;
-+			p_index = clk_fetch_parent_index(clk, parent);
-+			clk->safe_parent_index = p_index;
-+			clk->safe_parent = parent;
-+		}
-+	} else {
-+		clk->safe_parent = NULL;
-+	}
-+
- 	hlist_for_each_entry(child, &clk->children, child_node) {
- 		child->new_rate = clk_recalc(child, new_rate);
- 		clk_calc_subtree(child, child->new_rate, NULL, 0);
-@@ -1439,17 +1452,47 @@ out:
-  * so that in case of an error we can walk down the whole tree again and
-  * abort the change.
-  */
--static struct clk *clk_propagate_rate_change(struct clk *clk, unsigned long event)
-+static struct clk *clk_propagate_rate_change(struct clk *clk,
-+					     unsigned long event)
- {
- 	struct clk *child, *tmp_clk, *fail_clk = NULL;
-+	struct clk *old_parent;
- 	int ret = NOTIFY_DONE;
- 
--	if (clk->rate == clk->new_rate)
-+	if (clk->rate == clk->new_rate && event != POST_RATE_CHANGE)
- 		return NULL;
- 
-+	switch (event) {
-+	case PRE_RATE_CHANGE:
-+		if (clk->safe_parent)
-+			clk->ops->set_parent(clk->hw, clk->safe_parent_index);
-+		clk->old_rate = clk->rate;
-+		break;
-+	case POST_RATE_CHANGE:
-+		if (clk->safe_parent) {
-+			old_parent = __clk_set_parent_before(clk,
-+							     clk->new_parent);
-+			if (clk->ops->set_rate_and_parent) {
-+				clk->ops->set_rate_and_parent(clk->hw,
-+						clk->new_rate,
-+						clk->new_parent ?
-+						clk->new_parent->rate : 0,
-+						clk->new_parent_index);
-+			} else if (clk->ops->set_parent) {
-+				clk->ops->set_parent(clk->hw,
-+						clk->new_parent_index);
-+			}
-+			__clk_set_parent_after(clk, clk->new_parent,
-+					       old_parent);
-+		}
-+		break;
-+	}
-+
- 	if (clk->notifier_count) {
--		ret = __clk_notify(clk, event, clk->rate, clk->new_rate);
--		if (ret & NOTIFY_STOP_MASK)
-+		if (event != POST_RATE_CHANGE || clk->old_rate != clk->rate)
-+			ret = __clk_notify(clk, event, clk->old_rate,
-+					   clk->new_rate);
-+		if (ret & NOTIFY_STOP_MASK && event != POST_RATE_CHANGE)
- 			fail_clk = clk;
- 	}
- 
-@@ -1494,7 +1537,8 @@ static void clk_change_rate(struct clk *
- 
- 	old_rate = clk->rate;
- 
--	if (clk->new_parent && clk->new_parent != clk->parent) {
-+	if (clk->new_parent && clk->new_parent != clk->parent &&
-+			!clk->safe_parent) {
- 		old_parent = __clk_set_parent_before(clk, clk->new_parent);
- 
- 		if (clk->ops->set_rate_and_parent) {
-@@ -1514,9 +1558,6 @@ static void clk_change_rate(struct clk *
- 
- 	clk->rate = clk->new_rate;
- 
--	if (clk->notifier_count && old_rate != clk->rate)
--		__clk_notify(clk, POST_RATE_CHANGE, old_rate, clk->rate);
--
- 	/*
- 	 * Use safe iteration, as change_rate can actually swap parents
- 	 * for certain clock types.
-@@ -1601,6 +1642,8 @@ int clk_set_rate(struct clk *clk, unsign
- 	/* change the rates */
- 	clk_change_rate(top, parent_rate);
- 
-+	clk_propagate_rate_change(top, POST_RATE_CHANGE);
-+
- out:
- 	clk_prepare_unlock();
- 
---- a/include/linux/clk-provider.h
-+++ b/include/linux/clk-provider.h
-@@ -179,6 +179,7 @@ struct clk_ops {
- 					struct clk **best_parent_clk);
- 	int		(*set_parent)(struct clk_hw *hw, u8 index);
- 	u8		(*get_parent)(struct clk_hw *hw);
-+	struct clk_hw	*(*get_safe_parent)(struct clk_hw *hw);
- 	int		(*set_rate)(struct clk_hw *hw, unsigned long rate,
- 				    unsigned long parent_rate);
- 	int		(*set_rate_and_parent)(struct clk_hw *hw,
---- a/include/linux/clk-private.h
-+++ b/include/linux/clk-private.h
-@@ -38,8 +38,11 @@ struct clk {
- 	struct clk		**parents;
- 	u8			num_parents;
- 	u8			new_parent_index;
-+	u8			safe_parent_index;
- 	unsigned long		rate;
-+	unsigned long		old_rate;
- 	unsigned long		new_rate;
-+	struct clk		*safe_parent;
- 	struct clk		*new_parent;
- 	struct clk		*new_child;
- 	unsigned long		flags;