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authorShawn Guo <shawn.guo@linaro.org>2012-04-12 20:50:17 +0800
committerMike Turquette <mturquette@linaro.org>2012-04-24 16:37:39 -0700
commit81536e072b54e30bbfd1a9a6b8094f7b3dd5321c (patch)
tree6c1f0df5e626ecf7c30368033478cdaf48b1b872 /drivers
parent27d545915fd49cbe18a3877d82359896e9851efb (diff)
downloadlinux-81536e072b54e30bbfd1a9a6b8094f7b3dd5321c.tar.bz2
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/clk/clk-divider.c12
-rw-r--r--drivers/clk/clk.c16
2 files changed, 10 insertions, 18 deletions
diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c
index 5fc541d017f1..03b127c0313b 100644
--- a/drivers/clk/clk-divider.c
+++ b/drivers/clk/clk-divider.c
@@ -67,8 +67,8 @@ static int clk_divider_bestdiv(struct clk_hw *hw, unsigned long rate,
if (divider->flags & CLK_DIVIDER_ONE_BASED)
maxdiv--;
- if (!best_parent_rate) {
- parent_rate = __clk_get_rate(__clk_get_parent(hw->clk));
+ if (!(__clk_get_flags(hw->clk) & CLK_SET_RATE_PARENT)) {
+ parent_rate = *best_parent_rate;
bestdiv = DIV_ROUND_UP(parent_rate, rate);
bestdiv = bestdiv == 0 ? 1 : 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;
div = clk_divider_bestdiv(hw, rate, prate);
- if (prate)
- return *prate / div;
- else {
- unsigned long r;
- r = __clk_get_rate(__clk_get_parent(hw->clk));
- return r / div;
- }
+ return *prate / div;
}
static int clk_divider_set_rate(struct clk_hw *hw, unsigned long rate)
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 8f7c3849c8f6..1ab4f7e5c7ef 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -582,7 +582,7 @@ EXPORT_SYMBOL_GPL(clk_get_rate);
*/
unsigned long __clk_round_rate(struct clk *clk, unsigned long rate)
{
- unsigned long unused;
+ unsigned long parent_rate = 0;
if (!clk)
return -EINVAL;
@@ -590,10 +590,10 @@ unsigned long __clk_round_rate(struct clk *clk, unsigned long rate)
if (!clk->ops->round_rate)
return clk->rate;
- if (clk->flags & CLK_SET_RATE_PARENT)
- return clk->ops->round_rate(clk->hw, rate, &unused);
- else
- return clk->ops->round_rate(clk->hw, rate, NULL);
+ if (clk->parent)
+ parent_rate = clk->parent->rate;
+
+ 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)
{
struct clk *top = clk;
- unsigned long best_parent_rate;
+ unsigned long best_parent_rate = 0;
unsigned long new_rate;
/* sanity */
@@ -775,9 +775,6 @@ static struct clk *clk_calc_new_rates(struct clk *clk, unsigned long rate)
if (!clk->ops->round_rate) {
clk->new_rate = clk->rate;
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;
}
+ best_parent_rate = clk->parent->rate;
new_rate = clk->ops->round_rate(clk->hw, rate, &best_parent_rate);
if (best_parent_rate != clk->parent->rate) {