c692d896eb
Rework l2 scaling patch to fix some compile warning and to imporve the caling timings by removing call to unnecessary function. Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
200 lines
5.8 KiB
Diff
200 lines
5.8 KiB
Diff
--- a/drivers/cpufreq/cpufreq-dt.c
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+++ b/drivers/cpufreq/cpufreq-dt.c
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@@ -39,20 +39,85 @@ static struct freq_attr *cpufreq_dt_attr
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NULL,
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};
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+struct shared_data {
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+ unsigned long *curr_freq_table;
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+ unsigned long curr_l2_freq;
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+ unsigned long curr_l2_volt;
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+};
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+
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+static struct shared_data *cpus_shared_data;
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+
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static int set_target(struct cpufreq_policy *policy, unsigned int index)
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{
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struct private_data *priv = policy->driver_data;
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unsigned long freq = policy->freq_table[index].frequency;
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+ struct clk *l2_clk = policy->l2_clk;
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+ struct regulator *l2_regulator = policy->l2_regulator;
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+ unsigned long l2_freq, target_l2_freq;
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+ unsigned long l2_vol, target_l2_volt;
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+ unsigned long target_freq;
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int ret;
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mutex_lock(&priv->lock);
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ret = dev_pm_opp_set_rate(priv->cpu_dev, freq * 1000);
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if (!ret) {
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+ if (policy->l2_rate_set) {
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+ int cpu, l2_index, tol = 0;
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+ target_freq = freq * 1000;
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+
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+ cpus_shared_data->curr_freq_table[policy->cpu] = target_freq;
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+ for_each_present_cpu(cpu)
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+ if (cpu != policy->cpu)
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+ target_freq = max(target_freq, cpus_shared_data->curr_freq_table[cpu]);
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+
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+ for (l2_index = 2; l2_index > 0; l2_index--)
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+ if (target_freq >= policy->l2_cpufreq[l2_index])
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+ break;
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+
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+ l2_freq = cpus_shared_data->curr_l2_freq;
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+ target_l2_freq = policy->l2_rate[l2_index];
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+
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+ if (l2_freq != target_l2_freq) {
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+
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+ /*
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+ * Set to idle bin if switching from normal to high bin
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+ * or vice versa
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+ */
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+ if ( (l2_index == 2 && l2_freq == policy->l2_rate[1]) ||
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+ (l2_index == 1 && l2_freq == policy->l2_rate[2]) ) {
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+ ret = clk_set_rate(l2_clk, policy->l2_rate[0]);
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+ if (ret)
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+ goto exit;
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+ }
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+
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+ /* scale l2 with the core */
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+ ret = clk_set_rate(l2_clk, target_l2_freq);
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+ if (ret)
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+ goto exit;
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+ cpus_shared_data->curr_l2_freq = target_l2_freq;
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+
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+ if (policy->l2_volt_set) {
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+
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+ l2_vol = cpus_shared_data->curr_l2_volt;
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+ target_l2_volt = policy->l2_volt[l2_index];
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+
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+ if (l2_vol != target_l2_volt) {
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+ tol = target_l2_volt * policy->l2_volt_tol / 100;
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+ ret = regulator_set_voltage_tol(l2_regulator,target_l2_volt,tol);
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+ if (ret)
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+ goto exit;
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+ cpus_shared_data->curr_l2_volt = target_l2_volt;
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+ }
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+ }
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+ }
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+ }
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priv->opp_freq = freq * 1000;
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arch_set_freq_scale(policy->related_cpus, freq,
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policy->cpuinfo.max_freq);
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}
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+
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+exit:
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mutex_unlock(&priv->lock);
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return ret;
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@@ -195,6 +260,9 @@ static int cpufreq_init(struct cpufreq_p
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bool fallback = false;
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const char *name;
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int ret;
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+ struct device_node *np, *l2_np;
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+ struct clk *l2_clk = NULL;
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+ struct regulator *l2_regulator = NULL;
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cpu_dev = get_cpu_device(policy->cpu);
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if (!cpu_dev) {
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@@ -302,6 +370,57 @@ static int cpufreq_init(struct cpufreq_p
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policy->suspend_freq = dev_pm_opp_get_suspend_opp_freq(cpu_dev) / 1000;
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+ policy->l2_rate_set = false;
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+ policy->l2_volt_set = false;
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+
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+ l2_clk = clk_get(cpu_dev, "l2");
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+ if (!IS_ERR(l2_clk))
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+ policy->l2_clk = l2_clk;
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+
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+ l2_np = of_find_node_by_name(NULL, "qcom,l2");
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+ if (l2_np) {
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+ struct device_node *vdd;
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+ np = of_node_get(priv->cpu_dev->of_node);
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+
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+ if (np)
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+ of_property_read_u32(np, "voltage-tolerance", &policy->l2_volt_tol);
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+
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+ of_property_read_u32_array(l2_np, "qcom,l2-rates", policy->l2_rate, 3);
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+ if (policy->l2_rate[0] && policy->l2_rate[1] && policy->l2_rate[2]) {
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+ policy->l2_rate_set = true;
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+ of_property_read_u32_array(l2_np, "qcom,l2-cpufreq", policy->l2_cpufreq, 3);
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+ of_property_read_u32_array(l2_np, "qcom,l2-volt", policy->l2_volt, 3);
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+ } else
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+ pr_warn("L2: failed to parse L2 rates\n");
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+
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+ if (!policy->l2_cpufreq[0] && !policy->l2_cpufreq[1] &&
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+ !policy->l2_cpufreq[2] && policy->l2_rate_set) {
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+ int i;
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+
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+ pr_warn("L2: failed to parse target cpu freq, using defaults\n");
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+ for (i = 0; i < 3; i++)
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+ policy->l2_cpufreq[i] = policy->l2_rate[i];
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+ }
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+
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+ if (policy->l2_volt[0] && policy->l2_volt[1] && policy->l2_volt[2] &&
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+ policy->l2_volt_tol && policy->l2_rate_set) {
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+ vdd = of_parse_phandle(l2_np, "qcom,l2-supply", 0);
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+
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+ if (vdd) {
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+ l2_regulator = devm_regulator_get(cpu_dev, vdd->name);
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+ if (!IS_ERR(l2_regulator)) {
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+ policy->l2_regulator = l2_regulator;
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+ policy->l2_volt_set = true;
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+ } else {
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+ pr_warn("failed to get l2 supply\n");
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+ l2_regulator = NULL;
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+ }
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+
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+ of_node_put(vdd);
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+ }
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+ }
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+ }
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+
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/* Support turbo/boost mode */
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if (policy_has_boost_freq(policy)) {
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/* This gets disabled by core on driver unregister */
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@@ -401,6 +520,14 @@ static int dt_cpufreq_probe(struct platf
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if (ret)
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return ret;
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+ cpus_shared_data = kzalloc(sizeof(struct shared_data), GFP_KERNEL);
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+ if (!cpus_shared_data)
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+ return -ENOMEM;
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+
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+ cpus_shared_data->curr_freq_table = kzalloc(sizeof(int) * CONFIG_NR_CPUS, GFP_KERNEL);
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+ if (!cpus_shared_data->curr_freq_table)
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+ return -ENOMEM;
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+
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if (data) {
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if (data->have_governor_per_policy)
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dt_cpufreq_driver.flags |= CPUFREQ_HAVE_GOVERNOR_PER_POLICY;
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@@ -419,6 +546,8 @@ static int dt_cpufreq_probe(struct platf
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static int dt_cpufreq_remove(struct platform_device *pdev)
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{
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+ kfree(cpus_shared_data->curr_freq_table);
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+ kfree(cpus_shared_data);
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cpufreq_unregister_driver(&dt_cpufreq_driver);
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return 0;
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}
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--- a/include/linux/cpufreq.h
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+++ b/include/linux/cpufreq.h
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@@ -58,7 +58,15 @@ struct cpufreq_policy {
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should set cpufreq */
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unsigned int cpu; /* cpu managing this policy, must be online */
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- struct clk *clk;
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+ struct clk *clk;
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+ struct clk *l2_clk; /* L2 clock */
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+ struct regulator *l2_regulator; /* L2 supply */
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+ unsigned int l2_rate[3]; /* L2 bus clock rate */
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+ bool l2_rate_set;
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+ unsigned int l2_cpufreq[3]; /* L2 target CPU frequency */
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+ unsigned int l2_volt[3]; /* L2 voltage array */
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+ bool l2_volt_set;
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+ unsigned int l2_volt_tol; /* L2 voltage tolerance */
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struct cpufreq_cpuinfo cpuinfo;/* see above */
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unsigned int min; /* in kHz */
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