[PATCH 0/2] Fix some uses of clk->rate

[PATCH 0/2] Fix some uses of clk->rate

[Peter De Schrijver]

Using clk->rate directly does not take the CLK_GET_RATE_NOCACHE flag into
account. This can cause wrong results if the flag is set.

Peter De Schrijver (2):
  clk: use clk_get_rate() for debugfs
  clk: honor CLK_GET_RATE_NOCACHE in clk_set_rate

 drivers/clk/clk.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

-- 
1.7.7.rc0.72.g4b5ea.dirty

[PATCH 1/2] clk: use clk_get_rate() for debugfs

[Peter De Schrijver]

debugfs uses the rate field directly. However this ignores the
CLK_GET_RATE_NOCACHE flag. Call clk_get_rate() instead.

Tested-by: Mark Zhang <markz@nvidia.com>
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
---
 drivers/clk/clk.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index af0dbcc..9b2f941 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -107,7 +107,7 @@ static void clk_summary_show_one(struct seq_file *s, struct clk *c, int level)
 	seq_printf(s, "%*s%-*s %-11d %-12d %-10lu",
 		   level * 3 + 1, "",
 		   30 - level * 3, c->name,
-		   c->enable_count, c->prepare_count, c->rate);
+		   c->enable_count, c->prepare_count, clk_get_rate(c));
 	seq_printf(s, "\n");
 }
 
@@ -166,7 +166,7 @@ static void clk_dump_one(struct seq_file *s, struct clk *c, int level)
 	seq_printf(s, "\"%s\": { ", c->name);
 	seq_printf(s, "\"enable_count\": %d,", c->enable_count);
 	seq_printf(s, "\"prepare_count\": %d,", c->prepare_count);
-	seq_printf(s, "\"rate\": %lu", c->rate);
+	seq_printf(s, "\"rate\": %lu", clk_get_rate(c));
 }
 
 static void clk_dump_subtree(struct seq_file *s, struct clk *c, int level)
-- 
1.7.7.rc0.72.g4b5ea.dirty

[PATCH 2/2] clk: honor CLK_GET_RATE_NOCACHE in clk_set_rate

[Peter De Schrijver]

clk_set_rate() uses clk->rate directly. This causes problems if the clock
is marked as CLK_GET_RATE_NOCACHE. Hence call clk_get_rate() to get the
current rate.

Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
---
 drivers/clk/clk.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 9b2f941..2e669a8 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -1216,7 +1216,7 @@ int clk_set_rate(struct clk *clk, unsigned long rate)
 	clk_prepare_lock();
 
 	/* bail early if nothing to do */
-	if (rate == clk->rate)
+	if (rate == clk_get_rate(clk))
 		goto out;
 
 	if ((clk->flags & CLK_SET_RATE_GATE) && clk->prepare_count) {
-- 
1.7.7.rc0.72.g4b5ea.dirty

Re: [PATCH 0/2] Fix some uses of clk->rate

[Mike Turquette]

Quoting Peter De Schrijver (2013-06-05 08:06:34)
> Using clk->rate directly does not take the CLK_GET_RATE_NOCACHE flag into
> account. This can cause wrong results if the flag is set.
> 
> Peter De Schrijver (2):
>   clk: use clk_get_rate() for debugfs
>   clk: honor CLK_GET_RATE_NOCACHE in clk_set_rate
> 

Pulled into clk-next.

Thanks!
Mike

>  drivers/clk/clk.c |    6 +++---
>  1 files changed, 3 insertions(+), 3 deletions(-)
> 
> -- 
> 1.7.7.rc0.72.g4b5ea.dirty