linux-kernel - [PATCH 04/14] mfd: arizona: Allow building arizona MFD-core as module

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Date:   Sun, 27 Dec 2020 22:12:22 +0100
From:   Hans de Goede <hdegoede@...hat.com>
To:     Lee Jones <lee.jones@...aro.org>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Cezary Rojewski <cezary.rojewski@...el.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Liam Girdwood <liam.r.girdwood@...ux.intel.com>,
        Jie Yang <yang.jie@...ux.intel.com>,
        Mark Brown <broonie@...nel.org>
Cc:     Hans de Goede <hdegoede@...hat.com>, patches@...nsource.cirrus.com,
        linux-kernel@...r.kernel.org, alsa-devel@...a-project.org
Subject: [PATCH 04/14] mfd: arizona: Allow building arizona MFD-core as module

There is no reason why the arizona core,irq and codec model specific
regmap bits cannot be build as a module. All they do is export symbols
which are used by the arizona-spi and/or arizona-i2c modules, which
themselves can be built as module.

Change the Kconfig and Makefile arizona bits so that the arizona MFD-core
can be built as a module.

This is especially useful on x86 platforms with a WM5102 codec, this
allows the arizona MFD driver necessary for the WM5102 codec to be
enabled in generic distro-kernels without growing the base kernel-image
size.

Signed-off-by: Hans de Goede <hdegoede@...hat.com>
---
 drivers/mfd/Kconfig        |  2 +-
 drivers/mfd/Makefile       | 14 +++++++-------
 drivers/mfd/arizona-core.c |  2 ++
 3 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index cc0b73280c68..8fe9e10eaf51 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -1831,7 +1831,7 @@ config MFD_ARIZONA
 	select REGMAP
 	select REGMAP_IRQ
 	select MFD_CORE
-	bool
+	tristate
 
 config MFD_ARIZONA_I2C
 	tristate "Cirrus Logic/Wolfson Microelectronics Arizona platform with I2C"
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 14fdb188af02..3f208af1664f 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -41,24 +41,24 @@ obj-$(CONFIG_MFD_TQMX86)	+= tqmx86.o
 
 obj-$(CONFIG_MFD_LOCHNAGAR)	+= lochnagar-i2c.o
 
-obj-$(CONFIG_MFD_ARIZONA)	+= arizona-core.o
-obj-$(CONFIG_MFD_ARIZONA)	+= arizona-irq.o
+arizona-objs			:= arizona-core.o arizona-irq.o
+obj-$(CONFIG_MFD_ARIZONA)	+= arizona.o
 obj-$(CONFIG_MFD_ARIZONA_I2C)	+= arizona-i2c.o
 obj-$(CONFIG_MFD_ARIZONA_SPI)	+= arizona-spi.o
 ifeq ($(CONFIG_MFD_WM5102),y)
-obj-$(CONFIG_MFD_ARIZONA)	+= wm5102-tables.o
+arizona-objs			+= wm5102-tables.o
 endif
 ifeq ($(CONFIG_MFD_WM5110),y)
-obj-$(CONFIG_MFD_ARIZONA)	+= wm5110-tables.o
+arizona-objs			+= wm5110-tables.o
 endif
 ifeq ($(CONFIG_MFD_WM8997),y)
-obj-$(CONFIG_MFD_ARIZONA)	+= wm8997-tables.o
+arizona-objs			+= wm8997-tables.o
 endif
 ifeq ($(CONFIG_MFD_WM8998),y)
-obj-$(CONFIG_MFD_ARIZONA)	+= wm8998-tables.o
+arizona-objs			+= wm8998-tables.o
 endif
 ifeq ($(CONFIG_MFD_CS47L24),y)
-obj-$(CONFIG_MFD_ARIZONA)	+= cs47l24-tables.o
+arizona-objs			+= cs47l24-tables.o
 endif
 obj-$(CONFIG_MFD_WCD934X)	+= wcd934x.o
 obj-$(CONFIG_MFD_WM8400)	+= wm8400-core.o
diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c
index 000cb82023e3..a9ba1c865abf 100644
--- a/drivers/mfd/arizona-core.c
+++ b/drivers/mfd/arizona-core.c
@@ -1478,3 +1478,5 @@ int arizona_dev_exit(struct arizona *arizona)
 	return 0;
 }
 EXPORT_SYMBOL_GPL(arizona_dev_exit);
+
+MODULE_LICENSE("GPL v2");
-- 
2.28.0