/{ chosen { nordic,pm-ext-flash = &mx25r64; }; aliases { qspi-flash = &mx25r64; i2s-audio = &i2s0; }; }; &pinctrl { i2s0_default: i2s0_default { group1 { psels = , /* SCK/Bit Clock */ , /* WS/Word Select */ ; /* SD/Serial Data */ }; }; i2s0_sleep: i2s0_sleep { group1 { psels = , , ; low-power-enable; }; }; }; &i2s0 { status = "okay"; pinctrl-0 = <&i2s0_default>; pinctrl-1 = <&i2s0_sleep>; pinctrl-names = "default", "sleep"; };