Commit b4d7263bc3 ("kernel: of: avoid some unnecessary bad cell count
warnings") backported Linux commit 6e5773d52f4a ("of/address: Fix WARN
when attempting translating non-translatable addresses"), which started
requiring #address-cells for a device's parent if we want to use the
reg resource in a device node.
Many Chromium devices use a /firmware/coreboot device node that is
patched in by the boot firmware. These structures look something like:
# find /sys/firmware/devicetree/base/firmware/
/sys/firmware/devicetree/base/firmware/
/sys/firmware/devicetree/base/firmware/scm
/sys/firmware/devicetree/base/firmware/scm/compatible
/sys/firmware/devicetree/base/firmware/scm/name
/sys/firmware/devicetree/base/firmware/ranges
/sys/firmware/devicetree/base/firmware/chromeos
/sys/firmware/devicetree/base/firmware/chromeos/fmap-offset
/sys/firmware/devicetree/base/firmware/chromeos/compatible
/sys/firmware/devicetree/base/firmware/chromeos/readonly-firmware-version
/sys/firmware/devicetree/base/firmware/chromeos/nonvolatile-context-storage
/sys/firmware/devicetree/base/firmware/chromeos/hardware-id
/sys/firmware/devicetree/base/firmware/chromeos/firmware-type
/sys/firmware/devicetree/base/firmware/chromeos/vboot-shared-data
/sys/firmware/devicetree/base/firmware/chromeos/nonvolatile-context-offset
/sys/firmware/devicetree/base/firmware/chromeos/firmware-version
/sys/firmware/devicetree/base/firmware/chromeos/nonvolatile-context-size
/sys/firmware/devicetree/base/firmware/chromeos/name
/sys/firmware/devicetree/base/firmware/coreboot
/sys/firmware/devicetree/base/firmware/coreboot/compatible
/sys/firmware/devicetree/base/firmware/coreboot/board-id
/sys/firmware/devicetree/base/firmware/coreboot/reg
/sys/firmware/devicetree/base/firmware/coreboot/name
/sys/firmware/devicetree/base/firmware/name
Notably, there is no #{address,size}-cells in /firmware.
This breaks any driver relying on a device under /firmware, such as the
coreboot_table driver.
This is technically an ill-formatted FDT, and so we might as well just
add the properties ourselves.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/22951
Signed-off-by: Robert Marko <robimarko@gmail.com>
