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Commit 13fcfbb6 authored by Rui Miguel Silva's avatar Rui Miguel Silva Committed by Greg Kroah-Hartman
Browse files

greybus: makefile: add needed config options for lights 



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: default avatarRui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@google.com>
parent dc366f8e

drivers/staging/greybus/Makefile

+14 −1
Original line number Original line Diff line number Diff line
@@ -49,13 +49,26 @@ INSTALL_MOD_PATH ?= /.. 
PWD			:= $(shell pwd)

PWD			:= $(shell pwd)





# kernel config option that shall be enable

# 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

# kernel config option that shall be disable

CONFIG_OPTIONS_DISABLE :=

CONFIG_OPTIONS_DISABLE :=





# this only run in kbuild part of the makefile

# this only run in kbuild part of the makefile

ifneq ($(KERNELRELEASE),)

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)),, \

$(foreach opt,$(CONFIG_OPTIONS_ENABLE),$(if $(CONFIG_$(opt)),, \

     $(error CONFIG_$(opt) is disabled in the kernel configuration and must be enable \

     $(error CONFIG_$(opt) is disabled in the kernel configuration and must be enable \

     to continue compilation)))

     to continue compilation)))