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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 */
    --
    The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
    hosted by The Linux Foundation

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