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rpi-cmdline, rpi-u-boot-src: Support USB boot

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The Raspberry Pi 4 board can boot the image from USB memory.
But current meta-raspberrypi supports only SD boot.

This commit allows switching SD boot to other device.
For example, if you want to use USB boot, please define
the following parameters in your conf/local.conf file.
CMDLINE_ROOT_PARTITION = "/dev/sda2"
BOOT_MEDIA = "usb"

v4: Update extra-build-config.md to explain more detail for new variable.

v3: Changed variable name to "BOOT_MEDIA" (was "BOOT_DEVTIPE").

v2: Set existing microSD parameter as default. User can overwrite
some parameters.

Signed-off-by: Harunobu Kurokawa <harunobu.kurokawa.dn@renesas.com>
This commit is contained in:
Harunobu Kurokawa
2023-05-05 14:49:51 +09:00
committed by Andrei Gherzan
parent fde68b24f0
commit 4c033eb074
4 changed files with 24 additions and 3 deletions
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recipes-bsp/bootfiles/rpi-cmdline.bb
+3 -1
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@@ -9,7 +9,9 @@ inherit deploy nopackages
CMDLINE_DWC_OTG ?= "dwc_otg.lpm_enable=0"
CMDLINE_ROOT_FSTYPE ?= "rootfstype=ext4"
CMDLINE_ROOTFS ?= "root=/dev/mmcblk0p2 ${CMDLINE_ROOT_FSTYPE} rootwait"
CMDLINE_ROOT_PARTITION ?= "/dev/mmcblk0p2"
CMDLINE_ROOTFS ?= "root=${CMDLINE_ROOT_PARTITION} ${CMDLINE_ROOT_FSTYPE} rootwait"
CMDLINE_SERIAL ?= "${@oe.utils.conditional("ENABLE_UART", "1", "console=serial0,115200", "", d)}"