linuxspi with patched avrdude

[martynwheeler]

Hi,

I have a patched version of avrdude with linuxspi. The latest patch uses the format:

avrdude -c linuxspi -P /dev/spidev:/dev/gpiochip[:resetpin]

this fails on make ispload due to the way the get_isp_port variable is handled.

I have a workaround by changing:

# Returns the ISP port (first wildcard expansion) if it exists, otherwise it errors.
get_isp_port = $(if $(wildcard $(ISP_PORT)),$(firstword $(wildcard $(ISP_PORT))),$(if $(findstring Xusb,X$(ISP_PORT)),$(ISP_PORT),$(error ISP port $(ISP_PORT) not found!)))

to:

# Returns the ISP port (first wildcard expansion) if it exists, otherwise it errors.
get_isp_port = $(if $(wildcard $(ISP_PORT)),$(firstword $(wildcard $(ISP_PORT))),$(if $(findstring Xusb,X$(ISP_PORT)),$(ISP_PORT),$(error ISP port $(ISP_PORT) not found!)))

# append :/dev/gpiochip to isp_port
ifeq ($(strip $(ISP_PROG)),$(filter $(ISP_PROG), linuxspi))
        get_isp_port := $(strip $(get_isp_port)):$(strip $(ISP_GPIO))
endif

could this be added to the next release please?