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In the RZ/N1 SoC, the GPIO interrupts are multiplexed using the GPIO Interrupt Multiplexer. Add the multiplexer node and connect GPIO interrupt lines to the multiplexer. The interrupt-map available in the multiplexer node has to be updated in dts files depending on the GPIO usage. Indeed, the usage of an interrupt for a GPIO is board dependent. Up to 8 GPIOs can be used as an interrupt line (one per multiplexer output interrupt). Signed-off-by: Herve Codina (Schneider Electric) <herve.codina@bootlin.com> Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Link: https://patch.msgid.link/20260114093938.1089936-9-herve.codina@bootlin.com Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>