diff options
Diffstat (limited to 'kernel/drivers/clk/clk-composite.c')
-rw-r--r-- | kernel/drivers/clk/clk-composite.c | 67 |
1 files changed, 32 insertions, 35 deletions
diff --git a/kernel/drivers/clk/clk-composite.c b/kernel/drivers/clk/clk-composite.c index 956b7e54f..4735de066 100644 --- a/kernel/drivers/clk/clk-composite.c +++ b/kernel/drivers/clk/clk-composite.c @@ -55,78 +55,77 @@ static unsigned long clk_composite_recalc_rate(struct clk_hw *hw, return rate_ops->recalc_rate(rate_hw, parent_rate); } -static long clk_composite_determine_rate(struct clk_hw *hw, unsigned long rate, - unsigned long min_rate, - unsigned long max_rate, - unsigned long *best_parent_rate, - struct clk_hw **best_parent_p) +static int clk_composite_determine_rate(struct clk_hw *hw, + struct clk_rate_request *req) { struct clk_composite *composite = to_clk_composite(hw); const struct clk_ops *rate_ops = composite->rate_ops; const struct clk_ops *mux_ops = composite->mux_ops; struct clk_hw *rate_hw = composite->rate_hw; struct clk_hw *mux_hw = composite->mux_hw; - struct clk *parent; + struct clk_hw *parent; unsigned long parent_rate; long tmp_rate, best_rate = 0; unsigned long rate_diff; unsigned long best_rate_diff = ULONG_MAX; + long rate; int i; if (rate_hw && rate_ops && rate_ops->determine_rate) { __clk_hw_set_clk(rate_hw, hw); - return rate_ops->determine_rate(rate_hw, rate, min_rate, - max_rate, - best_parent_rate, - best_parent_p); + return rate_ops->determine_rate(rate_hw, req); } else if (rate_hw && rate_ops && rate_ops->round_rate && mux_hw && mux_ops && mux_ops->set_parent) { - *best_parent_p = NULL; + req->best_parent_hw = NULL; - if (__clk_get_flags(hw->clk) & CLK_SET_RATE_NO_REPARENT) { - parent = clk_get_parent(mux_hw->clk); - *best_parent_p = __clk_get_hw(parent); - *best_parent_rate = __clk_get_rate(parent); + if (clk_hw_get_flags(hw) & CLK_SET_RATE_NO_REPARENT) { + parent = clk_hw_get_parent(mux_hw); + req->best_parent_hw = parent; + req->best_parent_rate = clk_hw_get_rate(parent); - return rate_ops->round_rate(rate_hw, rate, - best_parent_rate); + rate = rate_ops->round_rate(rate_hw, req->rate, + &req->best_parent_rate); + if (rate < 0) + return rate; + + req->rate = rate; + return 0; } - for (i = 0; i < __clk_get_num_parents(mux_hw->clk); i++) { - parent = clk_get_parent_by_index(mux_hw->clk, i); + for (i = 0; i < clk_hw_get_num_parents(mux_hw); i++) { + parent = clk_hw_get_parent_by_index(mux_hw, i); if (!parent) continue; - parent_rate = __clk_get_rate(parent); + parent_rate = clk_hw_get_rate(parent); - tmp_rate = rate_ops->round_rate(rate_hw, rate, + tmp_rate = rate_ops->round_rate(rate_hw, req->rate, &parent_rate); if (tmp_rate < 0) continue; - rate_diff = abs(rate - tmp_rate); + rate_diff = abs(req->rate - tmp_rate); - if (!rate_diff || !*best_parent_p + if (!rate_diff || !req->best_parent_hw || best_rate_diff > rate_diff) { - *best_parent_p = __clk_get_hw(parent); - *best_parent_rate = parent_rate; + req->best_parent_hw = parent; + req->best_parent_rate = parent_rate; best_rate_diff = rate_diff; best_rate = tmp_rate; } if (!rate_diff) - return rate; + return 0; } - return best_rate; + req->rate = best_rate; + return 0; } else if (mux_hw && mux_ops && mux_ops->determine_rate) { __clk_hw_set_clk(mux_hw, hw); - return mux_ops->determine_rate(mux_hw, rate, min_rate, - max_rate, best_parent_rate, - best_parent_p); + return mux_ops->determine_rate(mux_hw, req); } else { pr_err("clk: clk_composite_determine_rate function called, but no mux or rate callback set!\n"); - return 0; + return -EINVAL; } } @@ -188,7 +187,7 @@ static void clk_composite_disable(struct clk_hw *hw) } struct clk *clk_register_composite(struct device *dev, const char *name, - const char **parent_names, int num_parents, + const char * const *parent_names, int num_parents, struct clk_hw *mux_hw, const struct clk_ops *mux_ops, struct clk_hw *rate_hw, const struct clk_ops *rate_ops, struct clk_hw *gate_hw, const struct clk_ops *gate_ops, @@ -200,10 +199,8 @@ struct clk *clk_register_composite(struct device *dev, const char *name, struct clk_ops *clk_composite_ops; composite = kzalloc(sizeof(*composite), GFP_KERNEL); - if (!composite) { - pr_err("%s: could not allocate composite clk\n", __func__); + if (!composite) return ERR_PTR(-ENOMEM); - } init.name = name; init.flags = flags | CLK_IS_BASIC; |