1 files changed, 37 insertions, 1 deletions

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index c3c3f8c07258..e62552a75f08 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -603,10 +603,15 @@ int clk_mux_determine_rate_flags(struct clk_hw *hw,
 			}
 
 			clk_core_forward_rate_req(core, req, parent, &parent_req, req->rate);
+
+			trace_clk_rate_request_start(&parent_req);
+
 			ret = clk_core_round_rate_nolock(parent, &parent_req);
 			if (ret)
 				return ret;
 
+			trace_clk_rate_request_done(&parent_req);
+
 			best = parent_req.rate;
 		} else if (parent) {
 			best = clk_core_get_rate_nolock(parent);
@@ -630,10 +635,15 @@ int clk_mux_determine_rate_flags(struct clk_hw *hw,
 			struct clk_rate_request parent_req;
 
 			clk_core_forward_rate_req(core, req, parent, &parent_req, req->rate);
+
+			trace_clk_rate_request_start(&parent_req);
+
 			ret = clk_core_round_rate_nolock(parent, &parent_req);
 			if (ret)
 				continue;
 
+			trace_clk_rate_request_done(&parent_req);
+
 			parent_rate = parent_req.rate;
 		} else {
 			parent_rate = clk_core_get_rate_nolock(parent);
@@ -1459,11 +1469,16 @@ static void clk_core_init_rate_req(struct clk_core * const core,
 {
 	struct clk_core *parent;
 
-	if (WARN_ON(!core || !req))
+	if (WARN_ON(!req))
 		return;
 
 	memset(req, 0, sizeof(*req));
+	req->max_rate = ULONG_MAX;
 
+	if (!core)
+		return;
+
+	req->core = core;
 	req->rate = rate;
 	clk_core_get_boundaries(core, &req->min_rate, &req->max_rate);
 
@@ -1546,10 +1561,15 @@ static int clk_core_round_rate_nolock(struct clk_core *core,
 		struct clk_rate_request parent_req;
 
 		clk_core_forward_rate_req(core, req, core->parent, &parent_req, req->rate);
+
+		trace_clk_rate_request_start(&parent_req);
+
 		ret = clk_core_round_rate_nolock(core->parent, &parent_req);
 		if (ret)
 			return ret;
 
+		trace_clk_rate_request_done(&parent_req);
+
 		req->best_parent_rate = parent_req.rate;
 		req->rate = parent_req.rate;
 
@@ -1600,10 +1620,14 @@ unsigned long clk_hw_round_rate(struct clk_hw *hw, unsigned long rate)
 
 	clk_core_init_rate_req(hw->core, &req, rate);
 
+	trace_clk_rate_request_start(&req);
+
 	ret = clk_core_round_rate_nolock(hw->core, &req);
 	if (ret)
 		return 0;
 
+	trace_clk_rate_request_done(&req);
+
 	return req.rate;
 }
 EXPORT_SYMBOL_GPL(clk_hw_round_rate);
@@ -1632,8 +1656,12 @@ long clk_round_rate(struct clk *clk, unsigned long rate)
 
 	clk_core_init_rate_req(clk->core, &req, rate);
 
+	trace_clk_rate_request_start(&req);
+
 	ret = clk_core_round_rate_nolock(clk->core, &req);
 
+	trace_clk_rate_request_done(&req);
+
 	if (clk->exclusive_count)
 		clk_core_rate_protect(clk->core);
 
@@ -2125,10 +2153,14 @@ static struct clk_core *clk_calc_new_rates(struct clk_core *core,
 
 		clk_core_init_rate_req(core, &req, rate);
 
+		trace_clk_rate_request_start(&req);
+
 		ret = clk_core_determine_round_nolock(core, &req);
 		if (ret < 0)
 			return NULL;
 
+		trace_clk_rate_request_done(&req);
+
 		best_parent_rate = req.best_parent_rate;
 		new_rate = req.rate;
 		parent = req.best_parent_hw ? req.best_parent_hw->core : NULL;
@@ -2324,8 +2356,12 @@ static unsigned long clk_core_req_round_rate_nolock(struct clk_core *core,
 
 	clk_core_init_rate_req(core, &req, req_rate);
 
+	trace_clk_rate_request_start(&req);
+
 	ret = clk_core_round_rate_nolock(core, &req);
 
+	trace_clk_rate_request_done(&req);
+
 	/* restore the protection */
 	clk_core_rate_restore_protect(core, cnt);