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am5728 uart2使用



我已近在am57xx-beagke-x15-common.dtsi中添加了UART相关信息,如下图:
 
&uart1 {
 status = "okay";
 pinctrl-names = "default";
 pinctrl-0 = <&uart2_pins_default>;
 interrupts-extended = <&crossbar_mpu GIC_SPI 68 IRQ_TYPE_LEVEL_HIGH>,
         <&dra7_pmx_core 0x3f0>;
};
 
 
 uart2_pins_default: uart2_pins_default {
  pinctrl-single,pins = <
   DRA7XX_CORE_IOPAD(0x37f0, (PIN_INPUT_PULLUP | MUX_MODE4)) /* uart2_rxd.uart2_rxd */
   DRA7XX_CORE_IOPAD(0x37f4, (PIN_INPUT_PULLUP | MUX_MODE4)) /* uart2_txd.uart2_txd */
  >;
 };
但还是无法使用,是不是还需要设置其他