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Subject[PATCH] PM / devfreq: Use freq_table for available_frequencies
Date
Some devices use freq_table instead of OPP. For those devices, the
available_frequencies file shows up empty. Fix that by using freq_table to
generate the available_frequencies data when OPP is not present.

Signed-off-by: Saravana Kannan <skannan@codeaurora.org>
---
drivers/devfreq/devfreq.c | 15 +++++++++++----
1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
index 2042ec3..a715d15 100644
--- a/drivers/devfreq/devfreq.c
+++ b/drivers/devfreq/devfreq.c
@@ -912,19 +912,26 @@ static ssize_t available_frequencies_show(struct device *d,
struct devfreq *df = to_devfreq(d);
struct device *dev = df->dev.parent;
struct dev_pm_opp *opp;
+ unsigned int i = 0, max_state = df->profile->max_state;
+ bool use_opp;
ssize_t count = 0;
unsigned long freq = 0;

rcu_read_lock();
+ use_opp = dev_pm_opp_get_opp_count(dev) > 0;
do {
- opp = dev_pm_opp_find_freq_ceil(dev, &freq);
- if (IS_ERR(opp))
- break;
+ if (use_opp) {
+ opp = dev_pm_opp_find_freq_ceil(dev, &freq);
+ if (IS_ERR(opp))
+ break;
+ } else {
+ freq = df->profile->freq_table[i++];
+ }

count += scnprintf(&buf[count], (PAGE_SIZE - count - 2),
"%lu ", freq);
freq++;
- } while (1);
+ } while (use_opp || (!use_opp && i < max_state));
rcu_read_unlock();

/* Truncate the trailing space */
--
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