diff options
Diffstat (limited to 'target/linux/ipq806x/patches-4.14/0055-cpufreq-dt-Add-L2-frequency-scaling-support.patch')
| -rw-r--r-- | target/linux/ipq806x/patches-4.14/0055-cpufreq-dt-Add-L2-frequency-scaling-support.patch | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/target/linux/ipq806x/patches-4.14/0055-cpufreq-dt-Add-L2-frequency-scaling-support.patch b/target/linux/ipq806x/patches-4.14/0055-cpufreq-dt-Add-L2-frequency-scaling-support.patch new file mode 100644 index 0000000000..166964961b --- /dev/null +++ b/target/linux/ipq806x/patches-4.14/0055-cpufreq-dt-Add-L2-frequency-scaling-support.patch @@ -0,0 +1,90 @@ +From 0759cdff49f1cf361bf503c13f7bcb33da43ab95 Mon Sep 17 00:00:00 2001 +From: Georgi Djakov <georgi.djakov@linaro.org> +Date: Tue, 8 Sep 2015 11:24:41 +0300 +Subject: [PATCH 55/69] cpufreq-dt: Add L2 frequency scaling support + +Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org> +--- + drivers/cpufreq/cpufreq-dt.c | 41 ++++++++++++++++++++++++++++++++++++++++- + include/linux/cpufreq.h | 2 ++ + 2 files changed, 42 insertions(+), 1 deletion(-) + +--- a/drivers/cpufreq/cpufreq-dt.c ++++ b/drivers/cpufreq/cpufreq-dt.c +@@ -48,11 +48,41 @@ static int set_target(struct cpufreq_pol + struct private_data *priv = policy->driver_data; + int ret; + unsigned long target_freq = policy->freq_table[index].frequency * 1000; ++ struct clk *l2_clk = policy->l2_clk; ++ unsigned int l2_freq; ++ unsigned long new_l2_freq = 0; + + mutex_lock(&priv->lock); + ret = dev_pm_opp_set_rate(priv->cpu_dev, target_freq); +- if (!ret) ++ ++ if (!ret) { ++ if (!IS_ERR(l2_clk) && policy->l2_rate[0] && policy->l2_rate[1] && ++ policy->l2_rate[2]) { ++ static unsigned long krait_l2[CONFIG_NR_CPUS] = { }; ++ int cpu, ret = 0; ++ ++ if (target_freq >= policy->l2_rate[2]) ++ new_l2_freq = policy->l2_rate[2]; ++ else if (target_freq >= policy->l2_rate[1]) ++ new_l2_freq = policy->l2_rate[1]; ++ else ++ new_l2_freq = policy->l2_rate[0]; ++ ++ krait_l2[policy->cpu] = new_l2_freq; ++ for_each_present_cpu(cpu) ++ new_l2_freq = max(new_l2_freq, krait_l2[cpu]); ++ ++ l2_freq = clk_get_rate(l2_clk); ++ ++ if (l2_freq != new_l2_freq) { ++ /* scale l2 with the core */ ++ ret = clk_set_rate(l2_clk, new_l2_freq); ++ } ++ } ++ + priv->opp_freq = target_freq; ++ } ++ + mutex_unlock(&priv->lock); + + return ret; +@@ -196,6 +226,8 @@ static int cpufreq_init(struct cpufreq_p + const char *name; + int ret; + struct srcu_notifier_head *opp_srcu_head; ++ struct device_node *l2_np; ++ struct clk *l2_clk = NULL; + + cpu_dev = get_cpu_device(policy->cpu); + if (!cpu_dev) { +@@ -303,6 +335,13 @@ static int cpufreq_init(struct cpufreq_p + + policy->suspend_freq = dev_pm_opp_get_suspend_opp_freq(cpu_dev) / 1000; + ++ 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) ++ of_property_read_u32_array(l2_np, "qcom,l2-rates", policy->l2_rate, 3); ++ + ret = cpufreq_table_validate_and_show(policy, freq_table); + if (ret) { + dev_err(cpu_dev, "%s: invalid frequency table: %d\n", __func__, +--- a/include/linux/cpufreq.h ++++ b/include/linux/cpufreq.h +@@ -73,6 +73,8 @@ struct cpufreq_policy { + unsigned int cpu; /* cpu managing this policy, must be online */ + + struct clk *clk; ++ struct clk *l2_clk; /* L2 clock */ ++ unsigned int l2_rate[3]; /* L2 bus clock rate thresholds */ + struct cpufreq_cpuinfo cpuinfo;/* see above */ + + unsigned int min; /* in kHz */ |