diff options
Diffstat (limited to 'target/linux/ipq806x/patches-5.10/0054-cpufreq-dt-Handle-OPP-voltage-adjust-events.patch')
-rw-r--r-- | target/linux/ipq806x/patches-5.10/0054-cpufreq-dt-Handle-OPP-voltage-adjust-events.patch | 118 |
1 files changed, 0 insertions, 118 deletions
diff --git a/target/linux/ipq806x/patches-5.10/0054-cpufreq-dt-Handle-OPP-voltage-adjust-events.patch b/target/linux/ipq806x/patches-5.10/0054-cpufreq-dt-Handle-OPP-voltage-adjust-events.patch deleted file mode 100644 index 2e9c101d94..0000000000 --- a/target/linux/ipq806x/patches-5.10/0054-cpufreq-dt-Handle-OPP-voltage-adjust-events.patch +++ /dev/null @@ -1,118 +0,0 @@ -From 10577f74c35bd395951d1b2382c8d821089b5745 Mon Sep 17 00:00:00 2001 -From: Stephen Boyd <sboyd@codeaurora.org> -Date: Fri, 18 Sep 2015 17:52:08 -0700 -Subject: [PATCH 54/69] cpufreq-dt: Handle OPP voltage adjust events - -On some SoCs the Adaptive Voltage Scaling (AVS) technique is -employed to optimize the operating voltage of a device. At a -given frequency, the hardware monitors dynamic factors and either -makes a suggestion for how much to adjust a voltage for the -current frequency, or it automatically adjusts the voltage -without software intervention. - -In the former case, an AVS driver will call -dev_pm_opp_modify_voltage() and update the voltage for the -particular OPP the CPUs are using. Add an OPP notifier to -cpufreq-dt so that we can adjust the voltage of the CPU when AVS -updates the OPP. - -Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> -Acked-by: Viresh Kumar <viresh.kumar@linaro.org> -Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org> ---- - drivers/cpufreq/cpufreq-dt.c | 68 ++++++++++++++++++++++++++++++++++++++++++-- - 1 file changed, 65 insertions(+), 3 deletions(-) - ---- a/drivers/cpufreq/cpufreq-dt.c -+++ b/drivers/cpufreq/cpufreq-dt.c -@@ -27,6 +27,9 @@ struct private_data { - struct opp_table *opp_table; - struct device *cpu_dev; - const char *reg_name; -+ struct notifier_block opp_nb; -+ struct mutex lock; -+ unsigned long opp_freq; - bool have_static_opps; - }; - -@@ -42,12 +45,15 @@ static int set_target(struct cpufreq_pol - unsigned long freq = policy->freq_table[index].frequency; - int ret; - -+ mutex_lock(&priv->lock); - ret = dev_pm_opp_set_rate(priv->cpu_dev, freq * 1000); - - if (!ret) { -+ priv->opp_freq = freq * 1000; - arch_set_freq_scale(policy->related_cpus, freq, - policy->cpuinfo.max_freq); - } -+ mutex_unlock(&priv->lock); - - return ret; - } -@@ -90,6 +96,39 @@ node_put: - return name; - } - -+static int opp_notifier(struct notifier_block *nb, unsigned long event, -+ void *data) -+{ -+ struct dev_pm_opp *opp = data; -+ struct private_data *priv = container_of(nb, struct private_data, -+ opp_nb); -+ struct device *cpu_dev = priv->cpu_dev; -+ struct regulator *cpu_reg; -+ unsigned long volt, freq; -+ int ret = 0; -+ -+ if (event == OPP_EVENT_ADJUST_VOLTAGE) { -+ cpu_reg = dev_pm_opp_get_regulator(cpu_dev); -+ if (IS_ERR(cpu_reg)) { -+ ret = PTR_ERR(cpu_reg); -+ goto out; -+ } -+ volt = dev_pm_opp_get_voltage(opp); -+ freq = dev_pm_opp_get_freq(opp); -+ -+ mutex_lock(&priv->lock); -+ if (freq == priv->opp_freq) { -+ ret = regulator_set_voltage_triplet(cpu_reg, volt, volt, volt); -+ } -+ mutex_unlock(&priv->lock); -+ if (ret) -+ dev_err(cpu_dev, "failed to scale voltage: %d\n", ret); -+ } -+ -+out: -+ return notifier_from_errno(ret); -+} -+ - static int resources_available(void) - { - struct device *cpu_dev; -@@ -246,10 +285,14 @@ static int cpufreq_init(struct cpufreq_p - __func__, ret); - } - -+ mutex_init(&priv->lock); -+ priv->opp_nb.notifier_call = opp_notifier; -+ dev_pm_opp_register_notifier(cpu_dev, &priv->opp_nb); -+ - ret = dev_pm_opp_init_cpufreq_table(cpu_dev, &freq_table); - if (ret) { - dev_err(cpu_dev, "failed to init cpufreq table: %d\n", ret); -- goto out_free_opp; -+ goto out_unregister_nb; - } - - priv->cpu_dev = cpu_dev; -@@ -281,6 +324,8 @@ static int cpufreq_init(struct cpufreq_p - - out_free_cpufreq_table: - dev_pm_opp_free_cpufreq_table(cpu_dev, &freq_table); -+out_unregister_nb: -+ dev_pm_opp_unregister_notifier(cpu_dev, &priv->opp_nb); - out_free_opp: - if (priv->have_static_opps) - dev_pm_opp_of_cpumask_remove_table(policy->cpus); |