From dcedf3c5386e5aeeda556c1ad60bbbabe5285139 Mon Sep 17 00:00:00 2001
From: Taniya Das <tdas@codeaurora.org>
Date: Mon, 26 Aug 2019 21:21:21 +0530
Subject: [PATCH] trace: Add new trace event for DCVSH

Add trace to capture DCVSH updates to sched.

Change-Id: I57201ab0e41931cffe121c6ab18c46b1f26f250e
Signed-off-by: Taniya Das <tdas@codeaurora.org>
---
 drivers/cpufreq/qcom-cpufreq-hw.c |  5 +++++
 include/trace/events/dcvsh.h      | 35 +++++++++++++++++++++++++++++++
 2 files changed, 40 insertions(+)
 create mode 100644 include/trace/events/dcvsh.h

diff --git a/drivers/cpufreq/qcom-cpufreq-hw.c b/drivers/cpufreq/qcom-cpufreq-hw.c
index 4100b5e1be77..a1d3fb324151 100644
--- a/drivers/cpufreq/qcom-cpufreq-hw.c
+++ b/drivers/cpufreq/qcom-cpufreq-hw.c
@@ -18,6 +18,9 @@
 #include <linux/sched.h>
 #include <linux/slab.h>
 
+#define CREATE_TRACE_POINTS
+#include <trace/events/dcvsh.h>
+
 #define LUT_MAX_ENTRIES			40U
 #define LUT_SRC				GENMASK(31, 30)
 #define LUT_L_VAL			GENMASK(7, 0)
@@ -106,6 +109,8 @@ static unsigned long limits_mitigation_notify(struct cpufreq_qcom *c)
 		else {
 			sched_update_cpu_freq_min_max(&c->related_cpus, 0,
 					c->table[i].frequency);
+			trace_dcvsh_freq(cpumask_first(&c->related_cpus),
+						c->table[i].frequency);
 			return c->table[i].frequency;
 		}
 	}
diff --git a/include/trace/events/dcvsh.h b/include/trace/events/dcvsh.h
new file mode 100644
index 000000000000..37cb49a061bc
--- /dev/null
+++ b/include/trace/events/dcvsh.h
@@ -0,0 +1,35 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2019, The Linux Foundation. All rights reserved.
+ */
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM dcvsh
+
+#if !defined(_TRACE_DCVSH_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_DCVSH_H
+
+#include <linux/tracepoint.h>
+
+TRACE_EVENT(dcvsh_freq,
+	TP_PROTO(unsigned long cpu, unsigned long freq),
+
+	TP_ARGS(cpu, freq),
+
+	TP_STRUCT__entry(
+		__field(unsigned long, cpu)
+		__field(unsigned long, freq)
+	),
+
+	TP_fast_assign(
+		__entry->cpu = cpu;
+		__entry->freq = freq;
+	),
+
+	TP_printk("cpu:%lu max frequency:%lu", __entry->cpu, __entry->freq)
+);
+
+#endif /* _TRACE_DCVSH_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>