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https://github.com/openwrt/openwrt.git
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0ef755b8ad
Refactor l2 freq scaling patch to support voltage scaling and add support to base cache scaling on cpu freq scaling. Update the dtsi files with the new definition used in the new code. Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
162 lines
4.7 KiB
Diff
162 lines
4.7 KiB
Diff
--- a/drivers/cpufreq/cpufreq-dt.c
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+++ b/drivers/cpufreq/cpufreq-dt.c
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@@ -48,16 +48,71 @@ static int set_target(struct cpufreq_pol
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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_vol;
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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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+ static unsigned long krait_l2[CONFIG_NR_CPUS] = { };
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+ int cpu, l2_index, tol = 0;
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+
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+ target_freq = freq * 1000;
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+
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+ krait_l2[policy->cpu] = target_freq;
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+ for_each_present_cpu(cpu)
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+ target_freq = max(target_freq, krait_l2[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 = clk_get_rate(l2_clk);
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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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+ /* 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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+
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+ if (policy->l2_volt_set) {
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+
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+ l2_vol = regulator_get_voltage(l2_regulator);
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+ target_l2_vol = policy->l2_volt[l2_index];
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+
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+ if (l2_vol != target_l2_vol) {
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+ tol = target_l2_vol * policy->l2_volt_tol / 100;
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+ ret = regulator_set_voltage_tol(l2_regulator,target_l2_vol,tol);
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+ if (ret)
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+ goto exit;
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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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@@ -202,6 +257,9 @@ 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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@@ -309,6 +367,57 @@ 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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--- a/include/linux/cpufreq.h
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+++ b/include/linux/cpufreq.h
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@@ -72,7 +72,15 @@ 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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