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Diffstat (limited to 'target/linux/ipq806x/patches-5.10/0055-cpufreq-dt-Add-L2-frequency-scaling-support.patch')
-rw-r--r--target/linux/ipq806x/patches-5.10/0055-cpufreq-dt-Add-L2-frequency-scaling-support.patch199
1 files changed, 199 insertions, 0 deletions
diff --git a/target/linux/ipq806x/patches-5.10/0055-cpufreq-dt-Add-L2-frequency-scaling-support.patch b/target/linux/ipq806x/patches-5.10/0055-cpufreq-dt-Add-L2-frequency-scaling-support.patch
new file mode 100644
index 0000000000..910c2b1722
--- /dev/null
+++ b/target/linux/ipq806x/patches-5.10/0055-cpufreq-dt-Add-L2-frequency-scaling-support.patch
@@ -0,0 +1,199 @@
+--- a/drivers/cpufreq/cpufreq-dt.c
++++ b/drivers/cpufreq/cpufreq-dt.c
+@@ -39,20 +39,85 @@ static struct freq_attr *cpufreq_dt_attr
+ NULL,
+ };
+
++struct shared_data {
++ unsigned long *curr_freq_table;
++ unsigned long curr_l2_freq;
++ unsigned long curr_l2_volt;
++};
++
++static struct shared_data *cpus_shared_data;
++
+ static int set_target(struct cpufreq_policy *policy, unsigned int index)
+ {
+ struct private_data *priv = policy->driver_data;
+ unsigned long freq = policy->freq_table[index].frequency;
++ struct clk *l2_clk = policy->l2_clk;
++ struct regulator *l2_regulator = policy->l2_regulator;
++ unsigned long l2_freq, target_l2_freq;
++ unsigned long l2_vol, target_l2_volt;
++ unsigned long target_freq;
+ int ret;
+
+ mutex_lock(&priv->lock);
+ ret = dev_pm_opp_set_rate(priv->cpu_dev, freq * 1000);
+
+ if (!ret) {
++ if (policy->l2_rate_set) {
++ int cpu, l2_index, tol = 0;
++ target_freq = freq * 1000;
++
++ cpus_shared_data->curr_freq_table[policy->cpu] = target_freq;
++ for_each_present_cpu(cpu)
++ if (cpu != policy->cpu)
++ target_freq = max(target_freq, cpus_shared_data->curr_freq_table[cpu]);
++
++ for (l2_index = 2; l2_index > 0; l2_index--)
++ if (target_freq >= policy->l2_cpufreq[l2_index])
++ break;
++
++ l2_freq = cpus_shared_data->curr_l2_freq;
++ target_l2_freq = policy->l2_rate[l2_index];
++
++ if (l2_freq != target_l2_freq) {
++
++ /*
++ * Set to idle bin if switching from normal to high bin
++ * or vice versa
++ */
++ if ( (l2_index == 2 && l2_freq == policy->l2_rate[1]) ||
++ (l2_index == 1 && l2_freq == policy->l2_rate[2]) ) {
++ ret = clk_set_rate(l2_clk, policy->l2_rate[0]);
++ if (ret)
++ goto exit;
++ }
++
++ /* scale l2 with the core */
++ ret = clk_set_rate(l2_clk, target_l2_freq);
++ if (ret)
++ goto exit;
++ cpus_shared_data->curr_l2_freq = target_l2_freq;
++
++ if (policy->l2_volt_set) {
++
++ l2_vol = cpus_shared_data->curr_l2_volt;
++ target_l2_volt = policy->l2_volt[l2_index];
++
++ if (l2_vol != target_l2_volt) {
++ tol = target_l2_volt * policy->l2_volt_tol / 100;
++ ret = regulator_set_voltage_tol(l2_regulator,target_l2_volt,tol);
++ if (ret)
++ goto exit;
++ cpus_shared_data->curr_l2_volt = target_l2_volt;
++ }
++ }
++ }
++ }
+ priv->opp_freq = freq * 1000;
+ arch_set_freq_scale(policy->related_cpus, freq,
+ policy->cpuinfo.max_freq);
+ }
++
++exit:
+ mutex_unlock(&priv->lock);
+
+ return ret;
+@@ -195,6 +260,9 @@ static int cpufreq_init(struct cpufreq_p
+ bool fallback = false;
+ const char *name;
+ int ret;
++ struct device_node *np, *l2_np;
++ struct clk *l2_clk = NULL;
++ struct regulator *l2_regulator = NULL;
+
+ cpu_dev = get_cpu_device(policy->cpu);
+ if (!cpu_dev) {
+@@ -302,6 +370,57 @@ static int cpufreq_init(struct cpufreq_p
+
+ policy->suspend_freq = dev_pm_opp_get_suspend_opp_freq(cpu_dev) / 1000;
+
++ policy->l2_rate_set = false;
++ policy->l2_volt_set = false;
++
++ l2_clk = clk_get(cpu_dev, "l2");
++ if (!IS_ERR(l2_clk))
++ policy->l2_clk = l2_clk;
++
++ l2_np = of_find_node_by_name(NULL, "qcom,l2");
++ if (l2_np) {
++ struct device_node *vdd;
++ np = of_node_get(priv->cpu_dev->of_node);
++
++ if (np)
++ of_property_read_u32(np, "voltage-tolerance", &policy->l2_volt_tol);
++
++ of_property_read_u32_array(l2_np, "qcom,l2-rates", policy->l2_rate, 3);
++ if (policy->l2_rate[0] && policy->l2_rate[1] && policy->l2_rate[2]) {
++ policy->l2_rate_set = true;
++ of_property_read_u32_array(l2_np, "qcom,l2-cpufreq", policy->l2_cpufreq, 3);
++ of_property_read_u32_array(l2_np, "qcom,l2-volt", policy->l2_volt, 3);
++ } else
++ pr_warn("L2: failed to parse L2 rates\n");
++
++ if (!policy->l2_cpufreq[0] && !policy->l2_cpufreq[1] &&
++ !policy->l2_cpufreq[2] && policy->l2_rate_set) {
++ int i;
++
++ pr_warn("L2: failed to parse target cpu freq, using defaults\n");
++ for (i = 0; i < 3; i++)
++ policy->l2_cpufreq[i] = policy->l2_rate[i];
++ }
++
++ if (policy->l2_volt[0] && policy->l2_volt[1] && policy->l2_volt[2] &&
++ policy->l2_volt_tol && policy->l2_rate_set) {
++ vdd = of_parse_phandle(l2_np, "qcom,l2-supply", 0);
++
++ if (vdd) {
++ l2_regulator = devm_regulator_get(cpu_dev, vdd->name);
++ if (!IS_ERR(l2_regulator)) {
++ policy->l2_regulator = l2_regulator;
++ policy->l2_volt_set = true;
++ } else {
++ pr_warn("failed to get l2 supply\n");
++ l2_regulator = NULL;
++ }
++
++ of_node_put(vdd);
++ }
++ }
++ }
++
+ /* Support turbo/boost mode */
+ if (policy_has_boost_freq(policy)) {
+ /* This gets disabled by core on driver unregister */
+@@ -401,6 +520,14 @@ static int dt_cpufreq_probe(struct platf
+ if (ret)
+ return ret;
+
++ cpus_shared_data = kzalloc(sizeof(struct shared_data), GFP_KERNEL);
++ if (!cpus_shared_data)
++ return -ENOMEM;
++
++ cpus_shared_data->curr_freq_table = kzalloc(sizeof(int) * CONFIG_NR_CPUS, GFP_KERNEL);
++ if (!cpus_shared_data->curr_freq_table)
++ return -ENOMEM;
++
+ if (data) {
+ if (data->have_governor_per_policy)
+ dt_cpufreq_driver.flags |= CPUFREQ_HAVE_GOVERNOR_PER_POLICY;
+@@ -419,6 +546,8 @@ static int dt_cpufreq_probe(struct platf
+
+ static int dt_cpufreq_remove(struct platform_device *pdev)
+ {
++ kfree(cpus_shared_data->curr_freq_table);
++ kfree(cpus_shared_data);
+ cpufreq_unregister_driver(&dt_cpufreq_driver);
+ return 0;
+ }
+--- a/include/linux/cpufreq.h
++++ b/include/linux/cpufreq.h
+@@ -58,7 +58,15 @@ struct cpufreq_policy {
+ should set cpufreq */
+ unsigned int cpu; /* cpu managing this policy, must be online */
+
+- struct clk *clk;
++ struct clk *clk;
++ struct clk *l2_clk; /* L2 clock */
++ struct regulator *l2_regulator; /* L2 supply */
++ unsigned int l2_rate[3]; /* L2 bus clock rate */
++ bool l2_rate_set;
++ unsigned int l2_cpufreq[3]; /* L2 target CPU frequency */
++ unsigned int l2_volt[3]; /* L2 voltage array */
++ bool l2_volt_set;
++ unsigned int l2_volt_tol; /* L2 voltage tolerance */
+ struct cpufreq_cpuinfo cpuinfo;/* see above */
+
+ unsigned int min; /* in kHz */
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-15 18:43:51 +0000