Revision as of 09:24, 22 August 2017

Modify and Build U-boot

Yocto 1.5

You can download patch file as below:

File:bypass_advloader_Yocto_1.5.patch

u-boot-imx/arch/arm/lib/board.c

Index: arch/arm/lib/board.c
===================================================================
--- arch/arm/lib/board.c        (revision 2241)
+++ arch/arm/lib/board.c        (working copy)
@@ -411,7 +411,6 @@
        switch(dev)
        {
                case 1:
-               default:
                        /* booting from SD*/
                        printf("booting from SD\n");
                        setenv("mmcdev", "0");
@@ -448,6 +447,11 @@
                        if(emmc_exist)  setenv("mmcdev", "1");
                        break;
 #endif
+               default:
+                       printf("Default boot device\n");
+                       printf("booting from SD\n");
+                       setenv("mmcdev", "1");
+                       break;
        } 

        /*record ddr bit, 32 or 64 bit*/

build u-boot (we take DDR 1G for example)

make make mx6qrom5420_1G_config
make u-boot.imx -j4

Then you can put this file to mfgtool folder

Yocto 2.1

You can download patch file as below:

Modify mfgtool UCL2.xml

We add a new task for burning u-boot.imx to spi

  <LIST name="ADV bypass adv-loader" desc="update u-boot.imx to spi">
	<CMD state="BootStrap" type="boot" body="BootStrap" file ="firmware/u-boot.imx" ifdev="MX6Q">Loading U-boot</CMD>
	<CMD state="BootStrap" type="load" file="firmware/uImage" address="0x12000000"
          loadSection="OTH" setSection="OTH" HasFlashHeader="FALSE" ifdev="MX6Q">Loading Kernel.</CMD>
	<CMD state="BootStrap" type="load" file="firmware/initramfs.cpio.gz.uboot" address="0x12C00000"
          loadSection="OTH" setSection="OTH" HasFlashHeader="FALSE" ifdev="MX6Q">Loading Initramfs.</CMD>
	<CMD state="BootStrap" type="load" file="firmware/imx6q-%board%.dtb" address="0x18000000"
          loadSection="OTH" setSection="OTH" HasFlashHeader="FALSE" ifdev="MX6Q">Loading device tree.</CMD>
	<CMD state="BootStrap" type="jump" > Jumping to OS image. </CMD>
	<CMD state="Updater" type="push" body="$ flash_erase /dev/mtd0 0 192">Erasing SPI</CMD>
	<CMD state="Updater" type="push" body="send" file="files/u-boot.imx" ifdev="MX6Q">Sending u-boot.imx</CMD>
	<CMD state="Updater" type="push" body="$ dd if=$FILE of=/dev/mtd0 bs=512 seek=2">write u-boot.imx</CMD>
	<CMD state="Updater" type="push" body="$ echo Update Complete!">Done</CMD>
  </LIST>