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author | Chanwoo Choi <cw00.choi@samsung.com> | 2017-10-23 10:32:10 +0900 |
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committer | MyungJoo Ham <myungjoo.ham@samsung.com> | 2017-10-26 17:08:40 +0900 |
commit | 416b46a2627ae8de1466f90787dede6f9c5a1bfa (patch) | |
tree | afe1701ce9bc7b57af453c924e450fbc84acf23b /drivers/devfreq | |
parent | ea572f816032bef9ff2641a439a45651a20eab73 (diff) | |
download | linux-416b46a2627ae8de1466f90787dede6f9c5a1bfa.tar.gz linux-416b46a2627ae8de1466f90787dede6f9c5a1bfa.tar.xz |
PM / devfreq: Show the all available frequencies
The commit a76caf55e5b35 ("thermal: Add devfreq cooling") allows
the devfreq device to use the cooling device. When the cooling down
are required, the devfreq_cooling.c disables the OPP entry with
the dev_pm_opp_disable(). In result, 'available_frequencies'[1]
sysfs node never came to show the all available frequencies.
[1] /sys/class/devfreq/.../available_frequencies
So, this patch uses the 'freq_table' in the 'struct devfreq_dev_profile'
in order to show the all available frequencies.
- If 'freq_table' is NULL, devfreq core initializes them by using OPP values.
- If 'freq_table' is initialized, devfreq core just uses the 'freq_table'.
And this patch adds some comment about the sort way of 'freq_table'.
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Diffstat (limited to 'drivers/devfreq')
-rw-r--r-- | drivers/devfreq/devfreq.c | 16 |
1 files changed, 5 insertions, 11 deletions
diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c index b2920cd2b78e..381f92e5e794 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -1194,22 +1194,16 @@ static ssize_t available_frequencies_show(struct device *d, char *buf) { struct devfreq *df = to_devfreq(d); - struct device *dev = df->dev.parent; - struct dev_pm_opp *opp; ssize_t count = 0; - unsigned long freq = 0; + int i; - do { - opp = dev_pm_opp_find_freq_ceil(dev, &freq); - if (IS_ERR(opp)) - break; + mutex_lock(&df->lock); - dev_pm_opp_put(opp); + for (i = 0; i < df->profile->max_state; i++) count += scnprintf(&buf[count], (PAGE_SIZE - count - 2), - "%lu ", freq); - freq++; - } while (1); + "%lu ", df->profile->freq_table[i]); + mutex_unlock(&df->lock); /* Truncate the trailing space */ if (count) count--; |