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| author | Bernhard Beschow <shentey@gmail.com> | 2025-02-23 12:46:57 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2025-02-25 17:02:16 +0000 |
| commit | a81193c3e9a8220862120d8d4114191f3899f4b3 (patch) | |
| tree | d5f1d15678a4c0a83f86adb5b6945e249c253235 /docs/system | |
| parent | 487967bed65083db33561edc1255ced422bfbff5 (diff) | |
| download | focaccia-qemu-a81193c3e9a8220862120d8d4114191f3899f4b3.tar.gz focaccia-qemu-a81193c3e9a8220862120d8d4114191f3899f4b3.zip | |
hw/arm/fsl-imx8mp: Add USDHC storage controllers
The USDHC emulation allows for running real-world images such as those generated by Buildroot. Convert the board documentation accordingly instead of running a Linux kernel with ephemeral storage. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Bernhard Beschow <shentey@gmail.com> Message-id: 20250223114708.1780-8-shentey@gmail.com [PMM: drop 'static const' from usdhc_table[] for GCC 7.5] Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'docs/system')
| -rw-r--r-- | docs/system/arm/imx8mp-evk.rst | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/docs/system/arm/imx8mp-evk.rst b/docs/system/arm/imx8mp-evk.rst index 22541c5442..879c822356 100644 --- a/docs/system/arm/imx8mp-evk.rst +++ b/docs/system/arm/imx8mp-evk.rst @@ -12,6 +12,7 @@ The ``imx8mp-evk`` machine implements the following devices: * Up to 4 Cortex-A53 cores * Generic Interrupt Controller (GICv3) * 4 UARTs + * 3 USDHC Storage Controllers * Secure Non-Volatile Storage (SNVS) including an RTC * Clock Tree @@ -26,18 +27,23 @@ Direct Linux Kernel Boot Probably the easiest way to get started with a whole Linux system on the machine is to generate an image with Buildroot. Version 2024.11.1 is tested at the time -of writing and involves two steps. First run the following commands in the +of writing and involves three steps. First run the following commands in the toplevel directory of the Buildroot source tree: .. code-block:: bash - $ echo "BR2_TARGET_ROOTFS_CPIO=y" >> configs/freescale_imx8mpevk_defconfig $ make freescale_imx8mpevk_defconfig $ make Once finished successfully there is an ``output/image`` subfolder. Navigate into -it and patch the device tree with the following commands which will remove the -``cpu-idle-states`` properties from CPU nodes: +it and resize the SD card image to a power of two: + +.. code-block:: bash + + $ qemu-img resize sdcard.img 256M + +Finally, the device tree needs to be patched with the following commands which +will remove the ``cpu-idle-states`` properties from CPU nodes: .. code-block:: bash @@ -52,5 +58,5 @@ Now that everything is prepared the machine can be started as follows: -display none -serial null -serial stdio \ -kernel Image \ -dtb imx8mp-evk-patched.dtb \ - -initrd rootfs.cpio \ - -append "root=/dev/ram" + -append "root=/dev/mmcblk2p2" \ + -drive file=sdcard.img,if=sd,bus=2,format=raw,id=mmcblk2 |