From: Fabio Estevam festevam@gmail.com
Update the README file to take into accound the switch to SPL.
Signed-off-by: Fabio Estevam festevam@gmail.com Signed-off-by: Fabio Berton fabio.berton@ossystems.com.br Signed-off-by: Otavio Salvador otavio@ossystems.com.br ---
board/technexion/pico-imx6ul/README | 26 ++++++++++++++++++++------ 1 file changed, 20 insertions(+), 6 deletions(-)
diff --git a/board/technexion/pico-imx6ul/README b/board/technexion/pico-imx6ul/README index 2f66095097..a5415714ee 100644 --- a/board/technexion/pico-imx6ul/README +++ b/board/technexion/pico-imx6ul/README @@ -13,7 +13,13 @@ $ make mrproper $ make pico-imx6ul_defconfig $ make
-This will generate the U-Boot binary called u-boot.imx. +This generates the SPL and u-boot.img binaries. + +1. Loading U-Boot via USB Serial Download Protocol + +Note: This method is convenient for development purposes. +If the eMMC has already a U-Boot flashed with DFU support then +the user can go to step 2 below in order to update U-Boot.
Put pico board in USB download mode (refer to the document http://www.wandboard.org/images/hobbit/hobbitboard-imx6ul-reva1.pdf page 15) @@ -24,11 +30,15 @@ Connect a USB cable between the OTG pico port and the host PC
Open a terminal program such as minicom
-Copy u-boot.imx to the imx_usb_loader folder. +Copy SPL and u-boot.img to the imx_usb_loader folder. + +Load the SPL binary via USB:
-Load u-boot.imx via USB: +$ sudo ./imx_usb SPL
-$ sudo ./imx_usb u-boot.imx +Load the u-boot.img binary via USB: + +$ sudo ./imx_usb u-boot.img
Then U-Boot should start and its messages will appear in the console program.
@@ -37,12 +47,16 @@ Use the default environment variables: => env default -f -a => saveenv
+2. Flashing U-Boot into the eMMC + Run the DFU command: => dfu 0 mmc 0
-Transfer u-boot.imx that will be flashed into the eMMC: +Flash SPL and u-boot.img into the eMMC running the following commands on a PC: + +$ sudo dfu-util -D SPL -a spl
-$ sudo dfu-util -D u-boot.imx -a boot +$ sudo dfu-util -D u-boot.img -a u-boot
Then on the U-Boot prompt the following message should be seen after a successful upgrade: