Makefile

# make sure that the environment variables ARCH and CROSS_COMPILE
# are set for your architecture and cross compiler.
# And that KDIR points to the kernel to build against.
#
# e.g.:
# export ARCH=arm
# export CROSS_COMPILE=arm-linux-gnueabihf-
# export KDIR=../linux


# In case of out of tree build, build as a module
# (when build inside kernel we will not enter this directory and this will have no effect)
ifeq ($(CONFIG_BATTERY_BQ27520),)
CONFIG_BATTERY_BQ27520 := m
endif

ifneq ($(KERNELRELEASE),)

# add version number derived from Git
# ifeq ($(KDIR),)
# PLMA_TFA_AUDIO_DRV_DIR=$(realpath -f $(srctree)/$(src))
# else
# PLMA_TFA_AUDIO_DRV_DIR=$(realpath -f $(src))
# endif
# GIT_VERSION=$(shell cd $(PLMA_TFA_AUDIO_DRV_DIR); git describe --tags --dirty --match "v[0-9]*.[0-9]*.[0-9]*")
# EXTRA_CFLAGS += -DBQ2589X_GIT_VERSIONS=\"$(GIT_VERSION)\"

EXTRA_CFLAGS += -I$(src)/inc
EXTRA_CFLAGS += -Werror

obj-$(CONFIG_BATTERY_BQ27520) := src/bq27520_battery.o

bq27520_charger-objs += src/bq27520_battery.o

else

MAKEARCH := $(MAKE) ARCH=$(ARCH) CROSS_COMPILE=$(CROSS_COMPILE)

all:
	$(MAKEARCH) -C $(KDIR) M=$(PWD) modules

modules:
	$(MAKE) ARCH=$(ARCH) CROSS_COMPILE=$(CROSS_COMPILE) -c $(KDIR) M=$(shell pwd) O="$(KBUILD_OUTPUT)" modules

modules_install:
	$(MAKEARCH) INSTALL_MOD_STRIP=1 -C $(KDIR) M=$(shell pwd) modules_install

clean:
	$(MAKEARCH) -C $(KDIR) M=$(PWD) clean
	rm -f $(bq27520_charger-objs)

endif