For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:Guillaume_G:branches:hardware/openSUSE_Tumbleweed/home:Guillaume_G:branches:hardware.repo
zypper refresh
zypper install libgpiod
For openSUSE Factory PPC run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:Guillaume_G:branches:hardware/openSUSE_Factory_PPC/home:Guillaume_G:branches:hardware.repo
zypper refresh
zypper install libgpiod
For openSUSE Factory ARM run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:Guillaume_G:branches:hardware/openSUSE_Factory_ARM/home:Guillaume_G:branches:hardware.repo
zypper refresh
zypper install libgpiod
For openSUSE Factory-z run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:Guillaume_G:branches:hardware/openSUSE_Factory-z/home:Guillaume_G:branches:hardware.repo
zypper refresh
zypper install libgpiod
For SLE 15 SP1 Backports run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:Guillaume_G:branches:hardware/SLE_15_SP1_Backports/home:Guillaume_G:branches:hardware.repo
zypper refresh
zypper install libgpiod
For 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:Guillaume_G:branches:hardware/15.4/home:Guillaume_G:branches:hardware.repo
zypper refresh
zypper install libgpiod