On 23 May 2014 19:07, Thomas Abraham <thomas.ab@xxxxxxxxxxx> wrote:
> 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 | 44 +++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 44 insertions(+)
>
> diff --git a/drivers/cpufreq/cpufreq_opp.c b/drivers/cpufreq/cpufreq_opp.c
> index c0c6f4a..2b3905b 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 +52,10 @@ 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
> + int j, len;
> + u32 *boost_freqs = NULL;
> +#endif
>
> rcu_read_lock();
>
> @@ -82,6 +87,45 @@ 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)) {
Maybe:
if(!of_find_property(...))
goto out;
To get rid of extra indentation levels below..
> + struct cpufreq_frequency_table *ft;
Declare at the top with boost_freqs, etc..
> + if (len == 0 || (len & (sizeof(u32) - 1)) != 0) {
s/len == 0/!len
And use IS_ALIGNED() instead of the right hand side of ||
> + dev_err(dev, "%s: invalid boost frequency\n", __func__);
> + ret = -EINVAL;
> + goto out;
> + }
> +
> + boost_freqs = kzalloc(len, GFP_KERNEL);
Can we do a devm_kzalloc instead? And why not kmalloc BTW ?
> + if (!boost_freqs) {
> + dev_warn(dev, "%s: no memory for boost freq table\n",
dev_err ?
> + __func__);
> + ret = -ENOMEM;
> + goto out;
> + }
> + of_property_read_u32_array(dev->of_node, "boost-frequencies",
> + boost_freqs, len / sizeof(u32));
Create int count = len / sizeof(u32) instead.. You have used this
multiple times.
> + for (j = 0; j < len / sizeof(u32); j++) {
> + ft = *table;
> + for (i = 0; ft->frequency != CPUFREQ_TABLE_END; i++) {
See if new macros can be used here instead. cpufreq_for_each_valid_entry().
> + if (boost_freqs[j] == ft->frequency) {
> + ft->flags |= CPUFREQ_BOOST_FREQ;
> + break;
> + }
> + ft++;
> + }
> +
> + if (ft->frequency == CPUFREQ_TABLE_END)
> + pr_err("%s: invalid boost frequency %d\n",
> + __func__, boost_freqs[j]);
Maybe a pr_debug on the else part as well ? With boost freqs ..
> + }
> + }
> +
> + kfree(boost_freqs);
> +#endif
> +
> out:
> rcu_read_unlock();
> if (ret)
> --
> 1.7.9.5
>
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