From 4ad69b80e886a845f56ce0a3d10211208693d92b Mon Sep 17 00:00:00 2001 From: Jerome Brunet Date: Mon, 9 Apr 2018 15:59:20 +0200 Subject: [PATCH] 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 Signed-off-by: Stephen Boyd --- drivers/clk/clk-mux.c | 10 +++++++++- drivers/clk/clk.c | 7 ++++--- include/linux/clk-provider.h | 3 +++ 3 files changed, 16 insertions(+), 4 deletions(-) diff --git a/drivers/clk/clk-mux.c b/drivers/clk/clk-mux.c index ac4a042f8658..1628b93655ed 100644 --- 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 ea67ac81c6f9..7af555f0e60c 100644 --- 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 210a890008f9..1d25e149c1c5 100644 --- 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);