LINUXSDK-OMAPL138: Linux Kernel stuck at -->Waiting for root device PARTUUID=22e9258b-02... and nand flash not detected in linux

I forgot to mention in omap development board(LCDK-Omapl138), The memory card has GPIO4[0] as card detect while in my custom board GPIO[1]

and NAND flash has 16 bit data bus while mine has 8 bit data bus

please give me some info about how to config these to run in linux

Hi Ramachandran,

You are booting your board from the SD card, right?

The kernel boot log seems showing the SD card is not detected. Since you use a different GPIO for card detect, did you modify the kernel device tree accordingly? Please provide the kernel patch showing how you modified it.

Hi

I ve change this line in My da850-lcdk.dts and checked the sd card got detected

ive changed the pin from 64 to 65 it worked, still trying to get my nand detected

&mmc0 {
    max-frequency = <50000000>;
    bus-width = <4>;
    pinctrl-names = "default";
    pinctrl-0 = <&mmc0_pins>;
    cd-gpios = <&gpio 65 GPIO_ACTIVE_LOW>;
    status = "okay";
};

This is the da850-lcdk.dts file

/*
 * Copyright (c) 2016 BayLibre, Inc.
 *
 * Licensed under GPLv2.
 */
/dts-v1/;
#include "da850.dtsi"
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/input/input.h>

/ {
    model = "DA850/AM1808/OMAP-L138 LCDK";
    compatible = "ti,da850-lcdk", "ti,da850";

    aliases {
        serial2 = &serial2;
        ethernet0 = &eth0;
    };

    chosen {
        stdout-path = "serial2:115200n8";
    };

    memory@c0000000 {
        /* 128 MB DDR2 SDRAM @ 0xc0000000 */
        reg = <0xc0000000 0x08000000>;
    };

    reserved-memory {
        #address-cells = <1>;
        #size-cells = <1>;
        ranges;

        dsp_memory_region: dsp-memory@c3000000 {
            compatible = "shared-dma-pool";
            reg = <0xc3000000 0x1000000>;
            reusable;
            status = "okay";
        };
    };

    vcc_5vd: fixedregulator-vcc_5vd {
        compatible = "regulator-fixed";
        regulator-name = "vcc_5vd";
        regulator-min-microvolt = <5000000>;
        regulator-max-microvolt = <5000000>;
        regulator-boot-on;
    };

    vcc_3v3d: fixedregulator-vcc_3v3d {
        /* TPS650250 - VDCDC1 */
        compatible = "regulator-fixed";
        regulator-name = "vcc_3v3d";
        regulator-min-microvolt = <3300000>;
        regulator-max-microvolt = <3300000>;
        vin-supply = <&vcc_5vd>;
        regulator-always-on;
        regulator-boot-on;
    };

    vcc_1v8d: fixedregulator-vcc_1v8d {
        /* TPS650250 - VDCDC2 */
        compatible = "regulator-fixed";
        regulator-name = "vcc_1v8d";
        regulator-min-microvolt = <1800000>;
        regulator-max-microvolt = <1800000>;
        vin-supply = <&vcc_5vd>;
        regulator-always-on;
        regulator-boot-on;
    };

    sound {
        compatible = "simple-audio-card";
        simple-audio-card,name = "DA850-OMAPL138 LCDK";
        simple-audio-card,widgets =
            "Line", "Line In",
            "Line", "Line Out",
            "Microphone", "Mic Jack";
        simple-audio-card,routing =
            "LINE1L", "Line In",
            "LINE1R", "Line In",
            "Line Out", "LLOUT",
            "Line Out", "RLOUT",
            "MIC3L", "Mic Jack",
            "MIC3R", "Mic Jack",
            "Mic Jack", "Mic Bias";
        simple-audio-card,format = "dsp_b";
        simple-audio-card,bitclock-master = <&link0_codec>;
        simple-audio-card,frame-master = <&link0_codec>;
        simple-audio-card,bitclock-inversion;

        simple-audio-card,cpu {
            sound-dai = <&mcasp0>;
            system-clock-frequency = <24576000>;
        };

        link0_codec: simple-audio-card,codec {
            sound-dai = <&tlv320aic3106>;
            system-clock-frequency = <24576000>;
        };
    };

    gpio-keys {
        compatible = "gpio-keys";
        autorepeat;

        user1 {
            label = "GPIO Key USER1";
            linux,code = <BTN_0>;
            gpios = <&gpio 36 GPIO_ACTIVE_LOW>;
        };

        user2 {
            label = "GPIO Key USER2";
            linux,code = <BTN_1>;
            gpios = <&gpio 37 GPIO_ACTIVE_LOW>;
        };
    };

    vga-bridge {
        compatible = "ti,ths8135";
        #address-cells = <1>;
        #size-cells = <0>;

        ports {
            #address-cells = <1>;
            #size-cells = <0>;

            port@0 {
                reg = <0>;

                vga_bridge_in: endpoint {
                    remote-endpoint = <&lcdc_out_vga>;
                };
            };

            port@1 {
                reg = <1>;

                vga_bridge_out: endpoint {
                    remote-endpoint = <&vga_con_in>;
                };
            };
        };
    };

    vga {
        compatible = "vga-connector";

        ddc-i2c-bus = <&i2c0>;

        port {
            vga_con_in: endpoint {
                remote-endpoint = <&vga_bridge_out>;
            };
        };
    };
};

&ref_clk {
    clock-frequency = <24000000>;
};

&pmx_core {
    status = "okay";

    mcasp0_pins: pinmux_mcasp0_pins {
        pinctrl-single,bits = <
            /* AHCLKX AFSX ACLKX */
            0x00 0x00101010 0x00f0f0f0
            /* ARX13 ARX14 */
            0x04 0x00000110 0x00000ff0
        >;
    };

    nand_pins: nand_pins {
        pinctrl-single,bits = <
            /* EMA_WAIT[0], EMA_OE, EMA_WE, EMA_CS[3] */
            0x1c 0x10110010  0xf0ff00f0
            /*
             * EMA_D[0], EMA_D[1], EMA_D[2],
             * EMA_D[3], EMA_D[4], EMA_D[5],
             * EMA_D[6], EMA_D[7]
             */
            0x24 0x11111111  0xffffffff
            /*
             * EMA_D[8],  EMA_D[9],  EMA_D[10],
             * EMA_D[11], EMA_D[12], EMA_D[13],
             * EMA_D[14], EMA_D[15]
             */
            0x20 0x11111111  0xffffffff
            /* EMA_A[1], EMA_A[2] */
            0x30 0x01100000  0x0ff00000
        >;
    };
};

&serial2 {
    pinctrl-names = "default";
    pinctrl-0 = <&serial2_rxtx_pins>;
    status = "okay";
};

&wdt {
    status = "okay";
};

&rtc0 {
    status = "okay";
};

&gpio {
    status = "okay";
};

&sata_refclk {
    status = "okay";
    clock-frequency = <100000000>;
};

&sata {
    status = "okay";
};

&mdio {
    pinctrl-names = "default";
    pinctrl-0 = <&mdio_pins>;
    bus_freq = <2200000>;
    status = "okay";
};

&eth0 {
    pinctrl-names = "default";
    pinctrl-0 = <&mii_pins>;
    status = "okay";
};

&mmc0 {
    max-frequency = <50000000>;
    bus-width = <4>;
    pinctrl-names = "default";
    pinctrl-0 = <&mmc0_pins>;
    cd-gpios = <&gpio 65 GPIO_ACTIVE_LOW>;
    status = "okay";
};

&i2c0 {
    pinctrl-names = "default";
    pinctrl-0 = <&i2c0_pins>;
    clock-frequency = <100000>;
    status = "okay";

    tlv320aic3106: tlv320aic3106@18 {
        #sound-dai-cells = <0>;
        compatible = "ti,tlv320aic3106";
        reg = <0x18>;
        adc-settle-ms = <40>;
        ai3x-micbias-vg = <1>;        /* 2.0V */
        status = "okay";

        /* Regulators */
        IOVDD-supply = <&vcc_3v3d>;
        AVDD-supply = <&vcc_3v3d>;
        DRVDD-supply = <&vcc_3v3d>;
        DVDD-supply = <&vcc_1v8d>;
    };
};

&mcasp0 {
    #sound-dai-cells = <0>;
    pinctrl-names = "default";
    pinctrl-0 = <&mcasp0_pins>;
    status = "okay";

    op-mode = <0>;   /* DAVINCI_MCASP_IIS_MODE */
    tdm-slots = <2>;
    serial-dir = <   /* 0: INACTIVE, 1: TX, 2: RX */
        0 0 0 0
        0 0 0 0
        0 0 0 0
        0 1 2 0
    >;
    tx-num-evt = <32>;
    rx-num-evt = <32>;
};

&usb_phy {
    status = "okay";
};

&usb0 {
    status = "okay";
};

&usb1 {
    status = "okay";
};

&aemif {
    pinctrl-names = "default";
    pinctrl-0 = <&nand_pins>;
    status = "okay";
    cs3 {
        #address-cells = <2>;
        #size-cells = <1>;
        clock-ranges;
        ranges;

        ti,cs-chipselect = <3>;

        nand@2000000,0 {
            compatible = "ti,davinci-nand";
            #address-cells = <1>;
            #size-cells = <1>;
            reg = <0 0x02000000 0x02000000
                   1 0x00000000 0x00008000>;

            ti,davinci-chipselect = <1>;
            ti,davinci-mask-ale = <0>;
            ti,davinci-mask-cle = <0>;
            ti,davinci-mask-chipsel = <0>;

            ti,davinci-nand-buswidth = <16>;
            ti,davinci-ecc-mode = "hw";
            ti,davinci-ecc-bits = <4>;
            ti,davinci-nand-use-bbt;

            /*
             * The OMAP-L132/L138 Bootloader doc SPRAB41E reads:
             * "To boot from NAND Flash, the AIS should be written
             * to NAND block 1 (NAND block 0 is not used by default)".
             * The same doc mentions that for ROM "Silicon Revision 2.1",
             * "Updated NAND boot mode to offer boot from block 0 or block 1".
             * However the limitaion is left here by default for compatibility
             * with older silicon and because it needs new boot pin settings
             * not possible in stock LCDK.
             */
            partitions {
                compatible = "fixed-partitions";
                #address-cells = <1>;
                #size-cells = <1>;

                partition@0 {
                    label = "u-boot env";
                    reg = <0 0x020000>;
                };
                partition@20000 {
                    /* The LCDK defaults to booting from this partition */
                    label = "u-boot";
                    reg = <0x020000 0x080000>;
                };
                partition@a0000 {
                    label = "free space";
                    reg = <0x0a0000 0>;
                };
            };
        };
    };
};

&prictrl {
    status = "okay";
};

&memctrl {
    status = "okay";
};

&lcdc {
    status = "okay";
    pinctrl-names = "default";
    pinctrl-0 = <&lcd_pins>;

    port {
        lcdc_out_vga: endpoint {
            remote-endpoint = <&vga_bridge_in>;
        };
    };
};

&vpif {
    pinctrl-names = "default";
    pinctrl-0 = <&vpif_capture_pins>;
    status = "okay";
};

&dsp {
    memory-region = <&dsp_memory_region>;
    status = "okay";
};

iam trying to change nand to work in 8 bit,still trying

is there any way to get my nand detected  in 8 bit mode