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The panel can be connected using 3WIRE, then it is however necessary that the flag SPI_3WIRE is preserved on the device, as we set this from generic device tree parsing code (or similar). Just |= the SPI mode. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Sam Ravnborg <sam@ravnborg.org> Cc: Stephan Gerhold <stephan@gerhold.net> Cc: Paweł Chmiel <pawel.mikolaj.chmiel@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/20201110234653.2248594-5-linus.walleij@linaro.org