[U-Boot] [PATCH] pico-imx6ul, pico-imx7d: Explain how to use eMMC user partition
The default U-Boot environment expects the use of eMMC user partition. To ensure we are using the proper eMMC partition for boot we need to run the `mmc partconf` command.
This patch updates the README instructions to avoid users to follow misleading instructions.
Signed-off-by: Otavio Salvador otavio@ossystems.com.br ---
board/technexion/pico-imx6ul/README | 9 ++++++++- board/technexion/pico-imx7d/README | 9 ++++++++- 2 files changed, 16 insertions(+), 2 deletions(-)
diff --git a/board/technexion/pico-imx6ul/README b/board/technexion/pico-imx6ul/README index bb8ee3f463..31f13d1b1d 100644 --- a/board/technexion/pico-imx6ul/README +++ b/board/technexion/pico-imx6ul/README @@ -50,7 +50,14 @@ Use the default environment variables:
2. Flashing U-Boot into the eMMC
-Run the DFU agent so we can flash the new images using dfu-util tool: +The default U-Boot environment expects the use of eMMC user +partition. To ensure we are using the proper eMMC partition for boot, +please run: + +=> mmc partconf 0 0 0 0 + +Next, un the DFU agent so we can flash the new images using dfu-util +tool:
=> dfu 0 mmc 0
diff --git a/board/technexion/pico-imx7d/README b/board/technexion/pico-imx7d/README index 24eb97e82c..525b0a6aec 100644 --- a/board/technexion/pico-imx7d/README +++ b/board/technexion/pico-imx7d/README @@ -47,7 +47,14 @@ Use the default environment variables:
2. Flashing U-Boot into the eMMC
-Run the DFU agent so we can flash the new images using dfu-util tool: +The default U-Boot environment expects the use of eMMC user +partition. To ensure we are using the proper eMMC partition for boot, +please run: + +=> mmc partconf 0 0 0 0 + +Next, un the DFU agent so we can flash the new images using dfu-util +tool:
=> dfu 0 mmc 0
Hi Otavio,
On Fri, Mar 22, 2019 at 9:28 AM Otavio Salvador otavio@ossystems.com.br wrote:
- Flashing U-Boot into the eMMC
-Run the DFU agent so we can flash the new images using dfu-util tool: +The default U-Boot environment expects the use of eMMC user +partition. To ensure we are using the proper eMMC partition for boot, +please run:
+=> mmc partconf 0 0 0 0
+Next, un the DFU agent so we can flash the new images using dfu-util
Typo: it should be "run" instead of "un"
I tested the instructions and it did not work for me. After I ran these steps I still got the old U-Boot on the eMMC.
The procedure that worked here is:
=> dfu 0 mmc 0 Flash SPL => dfu 0 mmc 0 Flash U-Boot proper
=> mmc partconf 0 0 0 0 => saveenv
On Fri, Mar 22, 2019 at 2:40 PM Fabio Estevam festevam@gmail.com wrote:
On Fri, Mar 22, 2019 at 9:28 AM Otavio Salvador otavio@ossystems.com.br wrote:
- Flashing U-Boot into the eMMC
-Run the DFU agent so we can flash the new images using dfu-util tool: +The default U-Boot environment expects the use of eMMC user +partition. To ensure we are using the proper eMMC partition for boot, +please run:
+=> mmc partconf 0 0 0 0
+Next, un the DFU agent so we can flash the new images using dfu-util
Typo: it should be "run" instead of "un"
I tested the instructions and it did not work for me. After I ran these steps I still got the old U-Boot on the eMMC.
The procedure that worked here is:
=> dfu 0 mmc 0 Flash SPL => dfu 0 mmc 0 Flash U-Boot proper
=> mmc partconf 0 0 0 0 => saveenv
I sent a v2.
The order is:
Use the default environment variables:
=> env default -f -a => saveenv
To ensure we are using the proper eMMC partition for boot, please run:
=> mmc partconf 0 0 0 0
Next, run the DFU agent so we can flash the new images using dfu-util tool:
=> dfu 0 mmc 0
Flash SPL and u-boot-dtb.img into the eMMC running the following commands on a PC:
$ sudo dfu-util -D SPL -a spl $ sudo dfu-util -D u-boot-dtb.img -a u-boot
The environment setup but be run using the current U-Boot as it has the dfu_alt_info which needs to be used. Please try this sequence and see if it works for you.
participants (3)
-
Fabio Estevam -
Otavio Salvador -
Otavio Salvador