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authorRam Chandra Jangir <rjangir@codeaurora.org>2018-05-04 21:57:33 +0530
committerJohn Crispin <john@phrozen.org>2018-05-22 20:34:14 +0200
commit93dd2f7211db6607184adadb488582e01fd5c29b (patch)
treefe982ceb4c20d2e1ecbe9ecfc386addaccae2e92 /target/linux/ipq806x/patches-4.14/0055-cpufreq-dt-Add-L2-frequency-scaling-support.patch
parent70e6ea319d3bfdfdb34be540dc7d89aa175b5587 (diff)
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ipq806x: add kernel 4.14 support
- Rebased the patches for 4.14 - Dropped spi-qup and 0027, 0028, 0029 clk patches since it's already included in upstream. Tested on IPQ AP148 Board: 1) NOR boot and NAND boot 2) Tested USB and PCIe interfaces 3) WDOG test 4) cpu frequency scaling 5) ethernet, 2G and 5G WiFi 6) ubi sysupgrade Signed-off-by: Ram Chandra Jangir <rjangir@codeaurora.org> Tested-by: Stefan Lippers-Hollmann <s.l-h@gmx.de>
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.patch90
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 */