[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/cpufreq/tango-cpufreq.c b/src/kernel/linux/v4.14/drivers/cpufreq/tango-cpufreq.c
new file mode 100644
index 0000000..89a7f86
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/cpufreq/tango-cpufreq.c
@@ -0,0 +1,38 @@
+#include <linux/of.h>
+#include <linux/cpu.h>
+#include <linux/clk.h>
+#include <linux/pm_opp.h>
+#include <linux/platform_device.h>
+
+static const struct of_device_id machines[] __initconst = {
+ { .compatible = "sigma,tango4" },
+ { /* sentinel */ }
+};
+
+static int __init tango_cpufreq_init(void)
+{
+ struct device *cpu_dev = get_cpu_device(0);
+ unsigned long max_freq;
+ struct clk *cpu_clk;
+ void *res;
+
+ if (!of_match_node(machines, of_root))
+ return -ENODEV;
+
+ cpu_clk = clk_get(cpu_dev, NULL);
+ if (IS_ERR(cpu_clk))
+ return -ENODEV;
+
+ max_freq = clk_get_rate(cpu_clk);
+
+ dev_pm_opp_add(cpu_dev, max_freq / 1, 0);
+ dev_pm_opp_add(cpu_dev, max_freq / 2, 0);
+ dev_pm_opp_add(cpu_dev, max_freq / 3, 0);
+ dev_pm_opp_add(cpu_dev, max_freq / 5, 0);
+ dev_pm_opp_add(cpu_dev, max_freq / 9, 0);
+
+ res = platform_device_register_data(NULL, "cpufreq-dt", -1, NULL, 0);
+
+ return PTR_ERR_OR_ZERO(res);
+}
+device_initcall(tango_cpufreq_init);