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In its current version, the manual for converting of board files from using GPIO lookup tables to software nodes recommends leaving the software nodes representing GPIO controllers as "free-floating", not attached objects and relying on the matching of their names against the GPIO controller's name. This is an abuse of the software node API and makes it impossible to create fw_devlinks between GPIO suppliers and consumers in this case. We want to remove this behavior from GPIOLIB and to this end, work on converting all existing drivers to using "attached" software nodes. Except for a few corner-cases where board files define consumers depending on GPIO controllers described in firmware - where we need to reference a real firmware node from a software node - which requires a more complex approach, most board files can easily be converted to using propert firmware node lookup. Update the documentation to recommend attaching the GPIO chip's software nodes to the actual platform devices and show how to do it. Reviewed-by: Linus Walleij <linusw@kernel.org> Link: https://patch.msgid.link/20260403-doc-gpio-swnodes-v2-1-c705f5897b80@oss.qualcomm.com Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>