Sunchip RK3288 Board (AD-B02-V1.1)

[msmsubair]

can anybody help to make the UART working on this board. the board has UART1, 3 and 4. it doesn't have UART2 which is Rockchip standard. is there any changes required in the uboot to get this UART working ? No Support got from Sunchip folks.

[ssekar15]

@msmsubair you can change in uart address in defconfig, then enable uart node in dts, change stdout-path in dts choosen node

[ssekar15]

not sure whether issue raised in github are notified to rockchip, couldn't see any response for the issue so far

[msmsubair]

are you talking about u-boot/arch/arm/dts/rk3288-u-boot.dtsi ? idid try that

};

chosen {
    stdout-path = &uart2;
    u-boot,spl-boot-order = &emmc, &sdmmc;
};

};

&uart2 { clock-frequency = <24000000>; u-boot,dm-pre-reloc; status = "okay"; }; but it didnt help

[ssekar15]

also in defconfig CONFIG_DEBUG_UART_BASE

[msmsubair]

CONFIG_DEBUG_UART_BASE=0xff690000 CONFIG_DEBUG_UART_CLOCK=24000000 CONFIG_DEBUG_UART_SHIFT=2

[msmsubair]

CONFIG_DEBUG_UART_BASE=0xff690000 to change to desired UART , correct, thank you

[msmsubair]

i tried this and now at least i can see some characters in the console with 115200, see below, any idea why this console not showing properly.

Terminal ready (eey����7%%933�9���������7%%933�3��������������#-#1���;=7�y[y��-#1�753='�5#-!#%5#�����j:����!�15�55�9!#!'�������Q=#��9=#��3-#7�9!##59�7-5��s=-'57�!�3!#7�==-'=;'5�7�!5��m#�����5-='��a����5-='��u����5-='��e!75'��u;�[i������FDKQz��!�=--!#�����ai��%%9��-�95#�75-95��7!A)-%1A5�3!#7�mw{�-#�Yw9=��{!!�3!%�Yw9=��{!!75��%%9�������e/5/!'7�%-9!!'��3=-'57��5������eey���g51=95=7��)5

9�)5'��=%��5#5���������io���;!!�%!75��c!#5��ygi���

                         ��-#-���������io
                                          ��)5'��c�}��뿿=''���������io
                                                                       �뿿7''��������io
                                                                                        �뿿9''��������io
                                                                                                         �뿿1''��������io
�뿿#''�������io
                �뿿=9')A;��������io
                                     ��c5����y���#-#1��5/53�!�!�=!;!!��yW[g�y�������������������^HE����=��=���5/���5/533��������o-�)5

[ssekar15]

Could be clock or pinmux setting.

1. try different baudrate in the host putty or minicom if it works, could be clock settings
2. check the pinmux of uart

[msmsubair]

miqi.dts

/dts-v1/;

include "rk3288-miqi.dtsi"

/ { model = "mqmaker MiQi"; compatible = "mqmaker,miqi", "rockchip,rk3288";

chosen {
    stdout-path = "serial1:115200n8";
};

};

&pinctrl { u-boot,dm-pre-reloc; };

&uart1 { u-boot,dm-pre-reloc; reg-shift = <2>; };

RK3288-dtsi

uart0: serial@ff180000 { compatible = "rockchip,rk3288-uart", "snps,dw-apb-uart"; reg = <0xff180000 0x100>; interrupts = <GIC_SPI 55 IRQ_TYPE_LEVEL_HIGH>; reg-shift = <2>; reg-io-width = <4>; clock-frequency = <24000000>; clocks = <&cru SCLK_UART0>, <&cru PCLK_UART0>; clock-names = "baudclk", "apb_pclk"; pinctrl-names = "default"; pinctrl-0 = <&uart0_xfer>; status = "disabled"; };

uart1: serial@ff190000 {
    compatible = "rockchip,rk3288-uart", "snps,dw-apb-uart";
    reg = <0xff190000 0x100>;
    interrupts = <GIC_SPI 56 IRQ_TYPE_LEVEL_HIGH>;
    reg-shift = <2>;
    reg-io-width = <4>;
    clock-frequency = <24000000>;
    clocks = <&cru SCLK_UART1>, <&cru PCLK_UART1>;
    clock-names = "baudclk", "apb_pclk";
    pinctrl-names = "default";
    pinctrl-0 = <&uart1_xfer>;
    status = "disabled";
};

uart2: serial@ff690000 {
    compatible = "rockchip,rk3288-uart", "snps,dw-apb-uart";
    reg = <0xff690000 0x100>;
    interrupts = <GIC_SPI 57 IRQ_TYPE_LEVEL_HIGH>;
    reg-shift = <2>;
    reg-io-width = <4>;
    clock-frequency = <24000000>;
    clocks = <&cru SCLK_UART2>, <&cru PCLK_UART2>;
    clock-names = "baudclk", "apb_pclk";
    pinctrl-names = "default";
    pinctrl-0 = <&uart2_xfer>;
    status = "disabled";
};
uart3: serial@ff1b0000 {
    compatible = "rockchip,rk3288-uart", "snps,dw-apb-uart";
    reg = <0xff1b0000 0x100>;
    interrupts = <GIC_SPI 58 IRQ_TYPE_LEVEL_HIGH>;
    reg-shift = <2>;
    reg-io-width = <4>;
    clock-frequency = <24000000>;
    clocks = <&cru SCLK_UART3>, <&cru PCLK_UART3>;
    clock-names = "baudclk", "apb_pclk";
    pinctrl-names = "default";
    pinctrl-0 = <&uart3_xfer>;
    status = "disabled";
};

uart4: serial@ff1c0000 {
    compatible = "rockchip,rk3288-uart", "snps,dw-apb-uart";
    reg = <0xff1c0000 0x100>;
    interrupts = <GIC_SPI 59 IRQ_TYPE_LEVEL_HIGH>;
    reg-shift = <2>;
    reg-io-width = <4>;
    clock-frequency = <24000000>;
    clocks = <&cru SCLK_UART4>, <&cru PCLK_UART4>;
    clock-names = "baudclk", "apb_pclk";
    pinctrl-names = "default";
    pinctrl-0 = <&uart4_xfer>;
    status = "disabled";
};

---

uart0 { uart0_xfer: uart0-xfer { rockchip,pins = <4 16 RK_FUNC_1 &pcfg_pull_up>, <4 17 RK_FUNC_1 &pcfg_pull_none>; };

        uart0_cts: uart0-cts {
            rockchip,pins = <4 18 RK_FUNC_1 &pcfg_pull_none>;
        };

        uart0_rts: uart0-rts {
            rockchip,pins = <4 19 RK_FUNC_1 &pcfg_pull_none>;
        };
    };

    uart1 {
        uart1_xfer: uart1-xfer {
            rockchip,pins = <5 8 RK_FUNC_1 &pcfg_pull_up>,
                    <5 9 RK_FUNC_1 &pcfg_pull_none>;
        };

        /*uart1_cts: uart1-cts {
            rockchip,pins = <5 10 RK_FUNC_1 &pcfg_pull_none>;
        };

        uart1_rts: uart1-rts {
            rockchip,pins = <5 11 RK_FUNC_1 &pcfg_pull_none>;
        };*/
    };

    uart2 {
        uart2_xfer: uart2-xfer {
            rockchip,pins = <7 22 RK_FUNC_1 &pcfg_pull_up>,
                    <7 23 RK_FUNC_1 &pcfg_pull_none>;
        };
        /* no rts / cts for uart2 */
    };

    uart3 {
        uart3_xfer: uart3-xfer {
            rockchip,pins = <7 7 RK_FUNC_1 &pcfg_pull_up>,
                    <7 8 RK_FUNC_1 &pcfg_pull_none>;
        };

        uart3_cts: uart3-cts {
            rockchip,pins = <7 9 RK_FUNC_1 &pcfg_pull_none>;
        };

        uart3_rts: uart3-rts {
            rockchip,pins = <7 10 RK_FUNC_1 &pcfg_pull_none>;
        };
    };

    uart4 {
        uart4_xfer: uart4-xfer {
            rockchip,pins = <5 12 3 &pcfg_pull_up>,
                    <5 13 3 &pcfg_pull_none>;
        };

        uart4_cts: uart4-cts {
            rockchip,pins = <5 14 3 &pcfg_pull_none>;
        };

        uart4_rts: uart4-rts {
            rockchip,pins = <5 15 3 &pcfg_pull_none>;
        };
    };

RK3288-uboot-dtsi */

/ { aliases { mmc0 = &emmc; mmc1 = &sdmmc; };

chosen {
    stdout-path = &uart1;
    u-boot,spl-boot-order = &emmc, &sdmmc;
};

};

&uart1 { clock-frequency = <24000000>; u-boot,dm-pre-reloc; status = "okay"; };

[msmsubair]

basically all board dtsi file have same config for uart 0-4. the baud rate is alreday set at 115200 i changed to uart1 and 3, both are showing same weird characters.

[ssekar15]

rts and cts should be disable. I could see that you did it for uart1. rockchip is new for me and I never worked on rk3288, I raised another issue for rk3128 and unfortunately just clicked your issue to see any reply from rockchip :)

[ssekar15]

I'm bit busy on another work so cannot look into deep atm

[msmsubair]

i was able to configure the UART 4, infact the pin was wrong in uboot, corrected it and now it is booting.

wrong one

uart4 { uart4_xfer: uart4-xfer { rockchip,pins = <5 12 3 &pcfg_pull_up>, <5 13 3 &pcfg_pull_none>;

correct one

uart4 { uart4_xfer: uart4-xfer { rockchip,pins = <5 15 3 &pcfg_pull_up>, <5 14 3 &pcfg_pull_none>;

[msmsubair]

now the next issue board shows starting kernel .............. tried to do the same changes in dts/dtsi files on Kernel. no success