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rk3288_ubuntu系统uart2 debug口无法使用
发表于 2016-7-6 15:47:01
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hi,
自带的固件可以用ttys2。
下载了android4.4的源码,用里面自带的内核源码,重新编译,把得出的resource.img重新烧进去,发觉没有了ttys2设备。这个内核源码dtsi里面关于uart2的描述和uart1、uart3有所不同。
uart_bb: serial@ff190000 {
compatible = "rockchip,serial";
reg = <0xff190000 0x100>;
interrupts = <GIC_SPI 56 IRQ_TYPE_LEVEL_HIGH>;
clock-frequency = <24000000>;
clocks = <&clk_uart1>, <&clk_gates6 9>;
clock-names = "sclk_uart", "pclk_uart";
reg-shift = <2>;
reg-io-width = <4>;
dmas = <&pdma1 3>, <&pdma1 4>;
#dma-cells = <2>;
pinctrl-names = "default";
pinctrl-0 = <&uart1_xfer &uart1_cts &uart1_rts>;
status = "disabled";
};
uart_dbg: serial@ff690000 {
compatible = "rockchip,serial";
reg = <0xff690000 0x100>;
interrupts = <GIC_SPI 57 IRQ_TYPE_LEVEL_HIGH>;
clock-frequency = <24000000>;
clocks = <&clk_uart2>, <&clk_gates11 9>;
clock-names = "sclk_uart", "pclk_uart";
reg-shift = <2>;
reg-io-width = <4>;
dmas = <&pdma0 4>, <&pdma0 5>;
#dma-cells = <2>;
pinctrl-names = "default";
pinctrl-0 = <&uart2_xfer>;
status = "disabled";
};
uart_gps: serial@ff1b0000 {
compatible = "rockchip,serial";
reg = <0xff1b0000 0x100>;
interrupts = <GIC_SPI 58 IRQ_TYPE_LEVEL_HIGH>;
clock-frequency = <24000000>;
clocks = <&clk_uart3>, <&clk_gates6 11>;
clock-names = "sclk_uart", "pclk_uart";
current-speed = <115200>;
reg-shift = <2>;
reg-io-width = <4>;
dmas = <&pdma1 7>, <&pdma1 8>;
#dma-cells = <2>;
pinctrl-names = "default";
pinctrl-0 = <&uart3_xfer &uart3_cts &uart3_rts>;
status = "disabled";
};
关于uart2的描述,pinctrl-0的值没有&uart2_cts &uart2_rts,同时没有指定波特率。
在dts文件里面可以打开uart1和uart3,但打开uart2以后,内核启动时,加载uart驱动的时候会卡6分钟左右,然后一直等待,无法将进入桌面。
请问想要用起uart2,怎么修改dtsi和dts?
有技术人员能够回答的吗?
能不能把自带的ubuntu系统固件的dts等放出来? |
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