linux-kernel - [RFC v1] opp: add config option for debug

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Date:   Wed,  4 May 2022 19:48:23 +0200
From:   Frank Wunderlich <linux@...web.de>
To:     linux-pm@...r.kernel.org
Cc:     Frank Wunderlich <frank-w@...lic-files.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Viresh Kumar <vireshk@...nel.org>, Nishanth Menon <nm@...com>,
        Stephen Boyd <sboyd@...nel.org>, linux-kernel@...r.kernel.org
Subject: [RFC v1] opp: add config option for debug

From: Frank Wunderlich <frank-w@...lic-files.de>

Currently OPP debug is enabled by DEBUG_DRIVER option. This is generic
driver debug and opp floods serial console. This is annoying if opp is
not needed so give it an additional config-key.

Signed-off-by: Frank Wunderlich <frank-w@...lic-files.de>
---
 drivers/base/Kconfig | 1 +
 drivers/opp/Kconfig  | 7 +++++++
 drivers/opp/Makefile | 2 +-
 3 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig
index 6f04b831a5c0..8ae826c95d5f 100644
--- a/drivers/base/Kconfig
+++ b/drivers/base/Kconfig
@@ -130,6 +130,7 @@ config DEV_COREDUMP
 config DEBUG_DRIVER
 	bool "Driver Core verbose debug messages"
 	depends on DEBUG_KERNEL
+	imply DEBUG_OPP
 	help
 	  Say Y here if you want the Driver core to produce a bunch of
 	  debug messages to the system log. Select this if you are having a
diff --git a/drivers/opp/Kconfig b/drivers/opp/Kconfig
index e8ce47b32735..6a2d2c6c1143 100644
--- a/drivers/opp/Kconfig
+++ b/drivers/opp/Kconfig
@@ -12,3 +12,10 @@ config PM_OPP
 	  representing individual voltage domains and provides SOC
 	  implementations a ready to use framework to manage OPPs.
 	  For more information, read <file:Documentation/power/opp.rst>
+
+menu "Operating Performance Points (OPP)"
+config DEBUG_OPP
+	bool "Debug Operating Performance Points"
+	help
+	  enable opp debugging
+endmenu
diff --git a/drivers/opp/Makefile b/drivers/opp/Makefile
index f65ed5985bb4..2589915eef95 100644
--- a/drivers/opp/Makefile
+++ b/drivers/opp/Makefile
@@ -1,5 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0-only
-ccflags-$(CONFIG_DEBUG_DRIVER)	:= -DDEBUG
+ccflags-$(CONFIG_DEBUG_OPP)	:= -DDEBUG
 obj-y				+= core.o cpu.o
 obj-$(CONFIG_OF)		+= of.o
 obj-$(CONFIG_DEBUG_FS)		+= debugfs.o
-- 
2.25.1