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https://e2e.ti.com/support/processors-group/processors/f/processors-forum/570778/linux-8250_omap-driver-and-rs485
工具/软件：Linux
8250_OMAP 驱动程序是否支持 RS485 TX 使能引脚控制？ 如果没有、如何使用 OMAP-serial 驱动程序？ 我使用内核4.4.419。
