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8003235b10
Introduce documentation regarding use of software nodes to describe GPIOs on legacy boards that have not been converted to device tree. Reviewed-by: Randy Dunlap <rdunlap@infradead.org> Tested-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Link: https://lore.kernel.org/r/tnaaz2qlk5jpbonfle7uy7pb54qx6ixwuczfbkwtxxwpj7hwas@y7a2rwko3k6c Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>