clk: honor CLK_MUX_ROUND_CLOSEST in generic clk mux

CLK_MUX_ROUND_CLOSEST is part of the clk_mux documentation but clk_mux
directly calls __clk_mux_determine_rate(), which overrides the flag.
As result, if clk_mux is instantiated with CLK_MUX_ROUND_CLOSEST, the
flag will be ignored and the clock rounded down.

To solve this, this patch expose clk_mux_determine_rate_flags() in the
clk-provider API and uses it in the determine_rate() callback of clk_mux.

Fixes: 15a02c1f6dd7 ("clk: Add __clk_mux_determine_rate_closest")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

diff --git a/drivers/clk/clk-mux.c b/drivers/clk/clk-mux.c
index ac4a042f8658258dbcbfdbc058e8b87c8412a51b..1628b93655edf809ec40d1e733a0b25ee7a8b26c 100644 (file)
--- a/drivers/clk/clk-mux.c
+++ b/drivers/clk/clk-mux.c
@@ -112,10 +112,18 @@ static int clk_mux_set_parent(struct clk_hw *hw, u8 index)
        return 0;
 }
 
+static int clk_mux_determine_rate(struct clk_hw *hw,
+                                 struct clk_rate_request *req)
+{
+       struct clk_mux *mux = to_clk_mux(hw);
+
+       return clk_mux_determine_rate_flags(hw, req, mux->flags);
+}
+
 const struct clk_ops clk_mux_ops = {
        .get_parent = clk_mux_get_parent,
        .set_parent = clk_mux_set_parent,
-       .determine_rate = __clk_mux_determine_rate,
+       .determine_rate = clk_mux_determine_rate,
 };
 EXPORT_SYMBOL_GPL(clk_mux_ops);
 

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index ea67ac81c6f97db113cef4977936776d1673ae3f..7af555f0e60c1b7d4ac31020a0765a6674064037 100644 (file)
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -426,9 +426,9 @@ static bool mux_is_better_rate(unsigned long rate, unsigned long now,
        return now <= rate && now > best;
 }
 
-static int
-clk_mux_determine_rate_flags(struct clk_hw *hw, struct clk_rate_request *req,
-                            unsigned long flags)
+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;
@@ -488,6 +488,7 @@ out:
 
        return 0;
 }
+EXPORT_SYMBOL_GPL(clk_mux_determine_rate_flags);
 
 struct clk *__clk_lookup(const char *name)
 {

diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index 210a890008f9e12987e578b949e6702864d076f6..1d25e149c1c5b8b439e2a301ae6c32ccd3164d2b 100644 (file)
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -765,6 +765,9 @@ int __clk_mux_determine_rate(struct clk_hw *hw,
 int __clk_determine_rate(struct clk_hw *core, struct clk_rate_request *req);
 int __clk_mux_determine_rate_closest(struct clk_hw *hw,
                                     struct clk_rate_request *req);
+int clk_mux_determine_rate_flags(struct clk_hw *hw,
+                                struct clk_rate_request *req,
+                                unsigned long flags);
 void clk_hw_reparent(struct clk_hw *hw, struct clk_hw *new_parent);
 void clk_hw_set_rate_range(struct clk_hw *hw, unsigned long min_rate,
                           unsigned long max_rate);