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clk: always pass parent_rate into .round_rate 

The parent_rate will likely be used by most .round_rate implementation
no matter whether flag CLK_SET_RATE_PARENT is set or not, so let's
always pass parent_rate into .round_rate.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
This commit is contained in:
Shawn Guo 2012-04-12 20:50:17 +08:00 committed by Mike Turquette
parent 27d545915f
commit 81536e072b
2 changed files with 10 additions and 18 deletions
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12
drivers/clk/clk-divider.c
View File

@ -67,8 +67,8 @@ static int clk_divider_bestdiv(struct clk_hw *hw, unsigned long rate,
if (divider->flags & CLK_DIVIDER_ONE_BASED) if (divider->flags & CLK_DIVIDER_ONE_BASED)
maxdiv--; maxdiv--;
if (!best_parent_rate) { if (!(__clk_get_flags(hw->clk) & CLK_SET_RATE_PARENT)) {
parent_rate = __clk_get_rate(__clk_get_parent(hw->clk)); parent_rate = *best_parent_rate;
bestdiv = DIV_ROUND_UP(parent_rate, rate); bestdiv = DIV_ROUND_UP(parent_rate, rate);
bestdiv = bestdiv == 0 ? 1 : bestdiv; bestdiv = bestdiv == 0 ? 1 : bestdiv;
bestdiv = bestdiv > maxdiv ? maxdiv : bestdiv; bestdiv = bestdiv > maxdiv ? maxdiv : bestdiv;
@ -108,13 +108,7 @@ static long clk_divider_round_rate(struct clk_hw *hw, unsigned long rate,
int div; int div;
div = clk_divider_bestdiv(hw, rate, prate); div = clk_divider_bestdiv(hw, rate, prate);
if (prate) return *prate / div;
return *prate / div;
else {
unsigned long r;
r = __clk_get_rate(__clk_get_parent(hw->clk));
return r / div;
}
} }
static int clk_divider_set_rate(struct clk_hw *hw, unsigned long rate) static int clk_divider_set_rate(struct clk_hw *hw, unsigned long rate)

16
drivers/clk/clk.c
View File

@ -582,7 +582,7 @@ EXPORT_SYMBOL_GPL(clk_get_rate);
*/ */
unsigned long __clk_round_rate(struct clk *clk, unsigned long rate) unsigned long __clk_round_rate(struct clk *clk, unsigned long rate)
{ {
unsigned long unused; unsigned long parent_rate = 0;
if (!clk) if (!clk)
return -EINVAL; return -EINVAL;
@ -590,10 +590,10 @@ unsigned long __clk_round_rate(struct clk *clk, unsigned long rate)
if (!clk->ops->round_rate) if (!clk->ops->round_rate)
return clk->rate; return clk->rate;
if (clk->flags & CLK_SET_RATE_PARENT) if (clk->parent)
return clk->ops->round_rate(clk->hw, rate, &unused); parent_rate = clk->parent->rate;
else
return clk->ops->round_rate(clk->hw, rate, NULL); return clk->ops->round_rate(clk->hw, rate, &parent_rate);
} }
/** /**
@ -763,7 +763,7 @@ static void clk_calc_subtree(struct clk *clk, unsigned long new_rate)
static struct clk *clk_calc_new_rates(struct clk *clk, unsigned long rate) static struct clk *clk_calc_new_rates(struct clk *clk, unsigned long rate)
{ {
struct clk *top = clk; struct clk *top = clk;
unsigned long best_parent_rate; unsigned long best_parent_rate = 0;
unsigned long new_rate; unsigned long new_rate;
/* sanity */ /* sanity */
@ -775,9 +775,6 @@ static struct clk *clk_calc_new_rates(struct clk *clk, unsigned long rate)
if (!clk->ops->round_rate) { if (!clk->ops->round_rate) {
clk->new_rate = clk->rate; clk->new_rate = clk->rate;
return NULL; return NULL;
} else {
new_rate = clk->ops->round_rate(clk->hw, rate, NULL);
goto out;
} }
} }
@ -794,6 +791,7 @@ static struct clk *clk_calc_new_rates(struct clk *clk, unsigned long rate)
goto out; goto out;
} }
best_parent_rate = clk->parent->rate;
new_rate = clk->ops->round_rate(clk->hw, rate, &best_parent_rate); new_rate = clk->ops->round_rate(clk->hw, rate, &best_parent_rate);
if (best_parent_rate != clk->parent->rate) { if (best_parent_rate != clk->parent->rate) {