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path: root/drivers/clk/clk.c
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Diffstat (limited to 'drivers/clk/clk.c')
-rw-r--r--drivers/clk/clk.c75
1 files changed, 43 insertions, 32 deletions
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index e495dd7a1eae..f57f821a5e5a 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -594,45 +594,58 @@ clk_core_forward_rate_req(struct clk_core *core,
req->max_rate = old_req->max_rate;
}
-int clk_mux_determine_rate_flags(struct clk_hw *hw,
- struct clk_rate_request *req,
- unsigned long flags)
+static int
+clk_core_determine_rate_no_reparent(struct clk_hw *hw,
+ struct clk_rate_request *req)
{
- struct clk_core *core = hw->core, *parent, *best_parent = NULL;
- int i, num_parents, ret;
- unsigned long best = 0;
-
- /* if NO_REPARENT flag set, pass through to current parent */
- if (core->flags & CLK_SET_RATE_NO_REPARENT) {
- parent = core->parent;
- if (core->flags & CLK_SET_RATE_PARENT) {
- struct clk_rate_request parent_req;
+ struct clk_core *core = hw->core;
+ struct clk_core *parent = core->parent;
+ unsigned long best;
+ int ret;
- if (!parent) {
- req->rate = 0;
- return 0;
- }
+ if (core->flags & CLK_SET_RATE_PARENT) {
+ struct clk_rate_request parent_req;
- clk_core_forward_rate_req(core, req, parent, &parent_req, req->rate);
+ if (!parent) {
+ req->rate = 0;
+ return 0;
+ }
- trace_clk_rate_request_start(&parent_req);
+ clk_core_forward_rate_req(core, req, parent, &parent_req,
+ req->rate);
- ret = clk_core_round_rate_nolock(parent, &parent_req);
- if (ret)
- return ret;
+ trace_clk_rate_request_start(&parent_req);
- trace_clk_rate_request_done(&parent_req);
+ ret = clk_core_round_rate_nolock(parent, &parent_req);
+ if (ret)
+ return ret;
- best = parent_req.rate;
- } else if (parent) {
- best = clk_core_get_rate_nolock(parent);
- } else {
- best = clk_core_get_rate_nolock(core);
- }
+ trace_clk_rate_request_done(&parent_req);
- goto out;
+ best = parent_req.rate;
+ } else if (parent) {
+ best = clk_core_get_rate_nolock(parent);
+ } else {
+ best = clk_core_get_rate_nolock(core);
}
+ req->rate = best;
+
+ return 0;
+}
+
+int clk_mux_determine_rate_flags(struct clk_hw *hw,
+ struct clk_rate_request *req,
+ unsigned long flags)
+{
+ struct clk_core *core = hw->core, *parent, *best_parent = NULL;
+ int i, num_parents, ret;
+ unsigned long best = 0;
+
+ /* if NO_REPARENT flag set, pass through to current parent */
+ if (core->flags & CLK_SET_RATE_NO_REPARENT)
+ return clk_core_determine_rate_no_reparent(hw, req);
+
/* find the parent that can provide the fastest rate <= rate */
num_parents = core->num_parents;
for (i = 0; i < num_parents; i++) {
@@ -670,9 +683,7 @@ int clk_mux_determine_rate_flags(struct clk_hw *hw,
if (!best_parent)
return -EINVAL;
-out:
- if (best_parent)
- req->best_parent_hw = best_parent->hw;
+ req->best_parent_hw = best_parent->hw;
req->best_parent_rate = best;
req->rate = best;