Hi Peng, On Thu, May 2, 2024 at 10:29 PM Peng Fan (OSS) <peng.fan@xxxxxxxxxxx> wrote: > + aliases { > + gpio0 = &gpio1; > + gpio1 = &gpio2; > + gpio2 = &gpio3; > + gpio3 = &gpio4; > + gpio4 = &gpio5; > + i2c0 = &lpi2c1; > + i2c1 = &lpi2c2; > + i2c2 = &lpi2c3; > + i2c3 = &lpi2c4; > + i2c4 = &lpi2c5; > + i2c5 = &lpi2c6; > + i2c6 = &lpi2c7; > + i2c7 = &lpi2c8; > + mmc0 = &usdhc1; > + mmc1 = &usdhc2; > + mmc2 = &usdhc3; > + serial0 = &lpuart1; > + serial1 = &lpuart2; > + serial2 = &lpuart3; > + serial3 = &lpuart4; > + serial4 = &lpuart5; > + serial5 = &lpuart6; > + serial6 = &lpuart7; > + serial7 = &lpuart8; > + }; This looks like an excessive aliases list. Can't you just have serial0, mmc0, and mmc1 instead? > + reg_1p8v: regulator-1p8v { > + compatible = "regulator-fixed"; > + regulator-max-microvolt = <1800000>; > + regulator-min-microvolt = <1800000>; > + regulator-name = "+V1.8_SW"; > + }; > + > + reg_3p3v: regulator-3p3v { > + compatible = "regulator-fixed"; > + regulator-max-microvolt = <3300000>; > + regulator-min-microvolt = <3300000>; > + regulator-name = "+V3.3_SW"; > + }; > + > + reg_vref_1v8: regulator-adc-vref { > + compatible = "regulator-fixed"; > + regulator-name = "vref_1v8"; > + regulator-min-microvolt = <1800000>; > + regulator-max-microvolt = <1800000>; > + }; These regulators are not used anywhere. Please add them when they have consumers for them.