Hi MyungJoo,

On 08/02/2018 01:13 PM, MyungJoo Ham wrote:

quoted

This driver registers itself as a devfreq device that allows devfreq
governors to make bandwidth votes for an interconnect path. This allows
applying various policies for different interconnect paths using devfreq
governors.

First of all, the name, "devfreq_icbw", is not appropriate for a
devfreq device driver. It confuses; it looks like a part of the
framework itself.

quoted

diff --git a/drivers/devfreq/devfreq_icbw.c b/drivers/devfreq/devfreq_icbw.c
new file mode 100644
index 0000000..231fb21
--- /dev/null
+++ b/drivers/devfreq/devfreq_icbw.c

@@ -0,0 +1,116 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2013-2014, 2018, The Linux Foundation. All rights reserved.
+ */
+
+#define pr_fmt(fmt) "icbw: " fmt
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/mutex.h>
+#include <linux/devfreq.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/interconnect.h>

Where can I find this file?

It is part of the On-chip interconnect API, which is currently under
review and is available here: https://lkml.org/lkml/2018/7/31/647

Thanks,
Georgi