Hi Thomas,
> From: Thomas Abraham <thomas.ab@xxxxxxxxxxx>
>
> Commit 6f19efc0 ("cpufreq: Add boost frequency support in core") adds
> support for CPU boost mode. This patch adds support for finding
> available boost frequencies from device tree and marking them as
> usable in boost mode.
>
> Cc: Nishanth Menon <nm@xxxxxx>
> Cc: Lukasz Majewski <l.majewski@xxxxxxxxxxx>
> Signed-off-by: Thomas Abraham <thomas.ab@xxxxxxxxxxx>
> ---
> drivers/cpufreq/cpufreq_opp.c | 45
> +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45
> insertions(+)
>
> diff --git a/drivers/cpufreq/cpufreq_opp.c
> b/drivers/cpufreq/cpufreq_opp.c index c0c6f4a..05fb115 100644
> --- a/drivers/cpufreq/cpufreq_opp.c
> +++ b/drivers/cpufreq/cpufreq_opp.c
> @@ -19,6 +19,7 @@
> #include <linux/pm_opp.h>
> #include <linux/rcupdate.h>
> #include <linux/slab.h>
> +#include <linux/of.h>
>
> /**
> * dev_pm_opp_init_cpufreq_table() - create a cpufreq table for a
> device @@ -51,6 +52,11 @@ int dev_pm_opp_init_cpufreq_table(struct
> device *dev, struct cpufreq_frequency_table *freq_table = NULL;
> int i, max_opps, ret = 0;
> unsigned long rate;
> +#ifdef CONFIG_CPU_FREQ_BOOST_SW
> + struct cpufreq_frequency_table *ft;
> + int len, count;
> + u32 *boost_freqs = NULL;
> +#endif
>
> rcu_read_lock();
>
> @@ -82,6 +88,45 @@ int dev_pm_opp_init_cpufreq_table(struct device
> *dev,
> *table = &freq_table[0];
>
> +#ifdef CONFIG_CPU_FREQ_BOOST_SW
> + if (!of_find_property(dev->of_node, "boost-frequencies",
> &len))
> + goto out;
> +
> + if (!len || !IS_ALIGNED(len, sizeof(u32))) {
> + dev_err(dev, "%s: invalid boost frequency\n",
> __func__);
> + ret = -EINVAL;
> + goto out;
> + }
> +
> + boost_freqs = kmalloc(len, GFP_KERNEL);
> + if (!boost_freqs) {
> + dev_err(dev, "%s: no memory for boost freq table\n",
> __func__);
> + ret = -ENOMEM;
> + goto out;
> + }
> +
> + count = len / sizeof(u32);
> + of_property_read_u32_array(dev->of_node, "boost-frequencies",
> + boost_freqs, count);
> +
> + for (i = 0; i < count; i++) {
> + cpufreq_for_each_valid_entry(ft, *table) {
> + if (boost_freqs[i] == ft->frequency) {
> + ft->flags |= CPUFREQ_BOOST_FREQ;
> + pr_debug("%s: marked %d as boost
> frequency\n",
> + __func__, boost_freqs[i]);
> + break;
> + }
> + }
> +
> + if (ft->frequency == CPUFREQ_TABLE_END)
> + dev_err(dev, "%s: invalid boost frequency
> %d\n",
> + __func__, boost_freqs[i]);
> + }
> +
> + kfree(boost_freqs);
> +#endif
> +
> out:
> rcu_read_unlock();
> if (ret)
Acked-by: Lukasz Majewski <l.majewski@xxxxxxxxxxx>
Thomas, thanks for this patch.
--
Best regards,
Lukasz Majewski
Samsung R&D Institute Poland (SRPOL) | Linux Platform Group
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
