From 8e4bff4cab0ddac6060645b0715210484d02ff40 Mon Sep 17 00:00:00 2001
From: Yuval Adam <_@yuv.al>
Date: Wed, 30 Aug 2017 08:25:59 +0000
Subject: Initial file dump from open source release

---
 drivers/platform/sprd/dmc_dfs_test.c | 112 +++++++++++++++++++++++++++++++++++
 1 file changed, 112 insertions(+)
 create mode 100644 drivers/platform/sprd/dmc_dfs_test.c

(limited to 'drivers/platform/sprd/dmc_dfs_test.c')

diff --git a/drivers/platform/sprd/dmc_dfs_test.c b/drivers/platform/sprd/dmc_dfs_test.c
new file mode 100644
index 00000000..3e186e32
--- /dev/null
+++ b/drivers/platform/sprd/dmc_dfs_test.c
@@ -0,0 +1,112 @@
+#include <linux/init.h>
+#include <linux/suspend.h>
+#include <linux/kobject.h>
+#include <linux/fs.h>
+#include <linux/io.h>
+#include <linux/errno.h>
+#include <linux/mm.h>
+#include <linux/io.h>
+#include <linux/debugfs.h>
+#include <linux/delay.h>
+#include <linux/wakelock.h>
+#include <linux/module.h>
+#include <linux/kthread.h>
+#include <soc/sprd/common.h>
+#include <soc/sprd/hardware.h>
+#include <soc/sprd/sci.h>
+#include <linux/earlysuspend.h>
+#include <soc/sprd/sci_glb_regs.h>
+#include <linux/random.h>
+#include <asm/hardware/cache-l2x0.h>
+#include <asm/cacheflush.h>
+#include <asm/suspend.h>
+#include <linux/vmalloc.h>
+#include <linux/cpu.h>
+#include <linux/printk.h>
+#include <soc/sprd/__sc8830_dmc_dfs.h>
+#include "soc/sprd/chip_x30g/dram_phy_28nm.h"
+
+#ifdef EMC_FREQ_AUTO_TEST
+static u32 dfs_freq_array[] = {
+	//192,
+	200,
+	//384,
+	400
+	//466
+	//533
+};
+
+static struct wake_lock dfs_test_lock;
+static DEFINE_SPINLOCK(emc_freq_spinlock);
+
+extern int scxx30_all_nonboot_cpus_died(void);
+extern u32 emc_clk_set(u32 new_clk, u32 sene);
+
+static int emc_freq_test_thread(void * data)
+{
+	u32 i = 0;
+	unsigned long spinlock_flags = 0;
+	msleep(17000);
+	wake_lock(&dfs_test_lock);
+
+	/* close cpu. */
+//	cpu_down(1);
+//	msleep(200);
+
+//	cpu_down(2);
+//	msleep(200);
+
+//	cpu_down(3);
+//	msleep(2000);
+
+	while(1){
+		spin_lock_irqsave(&emc_freq_spinlock, spinlock_flags);
+
+		/* check current cpu number is 1 or not. */
+		if (scxx30_all_nonboot_cpus_died() != 1){
+			printk("*** %s, num_online_cpus:%d ***\n", __func__, num_online_cpus() );
+			return 0;
+		}
+		
+		//set_current_state(TASK_INTERRUPTIBLE);
+//		i = get_random_int();
+//		i = i % 2;//(sizeof(dfs_freq_array)/ sizeof(dfs_freq_array[0]));
+		printk("emc_freq_test_thread i = %x, clk=%d\n", i, dfs_freq_array[i]);
+
+		emc_clk_set(dfs_freq_array[i], 0);
+
+		printk("e\n");
+
+		i++;
+		if (i >= 2) {
+			i = 0;
+		}
+
+		/* resume irq, cpu and so on. */
+		spin_unlock_irqrestore(&emc_freq_spinlock, spinlock_flags);
+
+//		schedule_timeout(10);
+		msleep(50);
+	}
+
+	/* open cpu */
+//	cpu_up(1);
+//	cpu_up(2);
+//	cpu_up(3);
+	return 0;
+}
+
+/* used this test must make sure cpu is only one. */
+/* platsmp.c : sci_get_core_num()  return 1 means signal core */
+void __emc_freq_test(void)
+{
+	struct task_struct * task;
+	wake_lock_init(&dfs_test_lock, WAKE_LOCK_SUSPEND,"emc_freq_test_wakelock");
+	task = kthread_create(emc_freq_test_thread, NULL, "emc freq test test");
+	if (task == 0) {
+		printk("Can't crate emc freq test thread!\n");
+	}else {
+		wake_up_process(task);
+	}
+}
+#endif
-- 
cgit v1.3.1