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-rw-r--r--target/linux/ipq806x/patches/0126-clk-Add-safe-switch-hook.patch146
1 files changed, 0 insertions, 146 deletions
diff --git a/target/linux/ipq806x/patches/0126-clk-Add-safe-switch-hook.patch b/target/linux/ipq806x/patches/0126-clk-Add-safe-switch-hook.patch
deleted file mode 100644
index a78319f..0000000
--- a/target/linux/ipq806x/patches/0126-clk-Add-safe-switch-hook.patch
+++ /dev/null
@@ -1,146 +0,0 @@
-From b7b3ceec506179d59e46e3a8ea8b370872cc7fcb Mon Sep 17 00:00:00 2001
-From: Stephen Boyd <sboyd@codeaurora.org>
-Date: Mon, 31 Mar 2014 16:52:29 -0700
-Subject: [PATCH 126/182] clk: Add safe switch hook
-
-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>
----
- drivers/clk/clk.c | 53 ++++++++++++++++++++++++++++++++++++------
- include/linux/clk-private.h | 2 ++
- include/linux/clk-provider.h | 1 +
- 3 files changed, 49 insertions(+), 7 deletions(-)
-
---- a/drivers/clk/clk.c
-+++ b/drivers/clk/clk.c
-@@ -1356,6 +1356,7 @@ static void clk_calc_subtree(struct clk
- struct clk *new_parent, u8 p_index)
- {
- struct clk *child;
-+ struct clk *parent;
-
- clk->new_rate = new_rate;
- clk->new_parent = new_parent;
-@@ -1365,6 +1366,17 @@ 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 = clk->ops->get_safe_parent(clk->hw);
-+ if (parent) {
-+ 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) {
- if (child->ops->recalc_rate)
- child->new_rate = child->ops->recalc_rate(child->hw, new_rate);
-@@ -1450,14 +1462,42 @@ out:
- 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);
-+ 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)
-+ ret = __clk_notify(clk, event, clk->rate,
-+ clk->new_rate);
-+ if (ret & NOTIFY_STOP_MASK && event != POST_RATE_CHANGE)
- fail_clk = clk;
- }
-
-@@ -1500,7 +1540,8 @@ static void clk_change_rate(struct clk *
- else if (clk->parent)
- best_parent_rate = clk->parent->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) {
-@@ -1523,9 +1564,6 @@ static void clk_change_rate(struct clk *
- else
- clk->rate = best_parent_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.
-@@ -1603,6 +1641,7 @@ int clk_set_rate(struct clk *clk, unsign
- /* change the rates */
- clk_change_rate(top);
-
-+ clk_propagate_rate_change(top, POST_RATE_CHANGE);
- out:
- clk_prepare_unlock();
-
---- a/include/linux/clk-private.h
-+++ b/include/linux/clk-private.h
-@@ -38,8 +38,10 @@ struct clk {
- struct clk **parents;
- u8 num_parents;
- u8 new_parent_index;
-+ u8 safe_parent_index;
- unsigned long rate;
- unsigned long new_rate;
-+ struct clk *safe_parent;
- struct clk *new_parent;
- struct clk *new_child;
- unsigned long flags;
---- a/include/linux/clk-provider.h
-+++ b/include/linux/clk-provider.h
-@@ -157,6 +157,7 @@ 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 *(*get_safe_parent)(struct clk_hw *hw);
- int (*set_rate)(struct clk_hw *hw, unsigned long,
- unsigned long);
- int (*set_rate_and_parent)(struct clk_hw *hw,