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greybus: makefile: add needed config options for lights

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Add a function to check kernel versions and append the necessary
options to support LEDS_CLASS, LEDS_CLASS_FLASH and  V4L2_FLASH_LED_CLASS
depending of the kernel version.

Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Rui Miguel Silva 2015-08-14 13:58:18 +01:00 committed by Greg Kroah-Hartman
parent dc366f8e39
commit 13fcfbb6c5
1 changed files with 14 additions and 1 deletions
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15
drivers/staging/greybus/Makefile
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@ -49,13 +49,26 @@ INSTALL_MOD_PATH ?= /..
PWD := $(shell pwd)
# kernel config option that shall be enable
CONFIG_OPTIONS_ENABLE := SYSFS SPI USB SND_SOC MMC
CONFIG_OPTIONS_ENABLE := SYSFS SPI USB SND_SOC MMC LEDS_CLASS
# kernel config option that shall be disable
CONFIG_OPTIONS_DISABLE :=
# this only run in kbuild part of the makefile
ifneq ($(KERNELRELEASE),)
# This function returns the argument version if current kernel version is minor
# than the passed version, return 1 if equal or the current kernel version if it
# is greater than argument version.
kvers_cmp=$(shell [[ "$(KERNELVERSION)" == "$(1)" ]] && echo 1 || echo -e "$(1)\n$(KERNELVERSION)" | sort -V | tail -1)
ifneq ($(call kvers_cmp,"3.19.0"),3.19.0)
CONFIG_OPTIONS_ENABLE += LEDS_CLASS_FLASH
endif
ifneq ($(call kvers_cmp,"4.2.0"),4.2.0)
CONFIG_OPTIONS_ENABLE += V4L2_FLASH_LED_CLASS
endif
$(foreach opt,$(CONFIG_OPTIONS_ENABLE),$(if $(CONFIG_$(opt)),, \
$(error CONFIG_$(opt) is disabled in the kernel configuration and must be enable \
to continue compilation)))