From 1fe27b10dc97c85821dfae1e4e6f9db4472287aa Mon Sep 17 00:00:00 2001 From: Brian Norris Date: Tue, 28 Apr 2026 13:06:55 -0700 Subject: [PATCH] ARM: tegra: Add #{address,size}-cells to Chromium-based /firmware Chromium/Depthcharge bootloaders may dynamically add a few device nodes to a system's DTB under a /firmware node. A typical DT looks something like the following: / { firmware { ranges; coreboot { compatible = "coreboot"; reg = <...>; ...; }; }; }; Notably, the /firmware node has an empty 'ranges', but does not have address/size-cells. Commit 6e5773d52f4a ("of/address: Fix WARN when attempting translating non-translatable addresses") started requiring #address-cells for a device's parent if we want to use the reg resource in a device node. This leads to errors like the following: [ 7.763870] coreboot_table firmware:coreboot: probe with driver coreboot_table failed with error -22 Add appropriate #{address,size}-cells to work around the problem. Note that Google has also patched the Depthcharge bootloader source to add {address,size}-cells [1], but bootloader updates are typically delivered only via Google OS updates. Not all users install Google software updates, and even if they do, Google may not produce updated binaries for all/older devices. [1] https://lore.kernel.org/all/20241209092809.GA3246424@google.com/ https://crrev.com/c/6051580 ("coreboot: Insert #address-cells and #size-cells for firmware node") Closes: https://lore.kernel.org/all/aeKlYzTiL0OB1y3g@google.com/ Fixes: 6e5773d52f4a ("of/address: Fix WARN when attempting translating non-translatable addresses") Signed-off-by: Brian Norris Reviewed-by: Douglas Anderson Signed-off-by: Thierry Reding --- arch/arm/boot/dts/nvidia/tegra124-nyan.dtsi | 5 +++++ arch/arm/boot/dts/nvidia/tegra124-venice2.dts | 5 +++++ 2 files changed, 10 insertions(+) diff --git a/arch/arm/boot/dts/nvidia/tegra124-nyan.dtsi b/arch/arm/boot/dts/nvidia/tegra124-nyan.dtsi index 974c76f007db..89a749cb8933 100644 --- a/arch/arm/boot/dts/nvidia/tegra124-nyan.dtsi +++ b/arch/arm/boot/dts/nvidia/tegra124-nyan.dtsi @@ -14,6 +14,11 @@ chosen { stdout-path = "serial0:115200n8"; }; + firmware { + #address-cells = <1>; + #size-cells = <1>; + }; + /* * Note that recent version of the device tree compiler (starting with * version 1.4.2) warn about this node containing a reg property, but diff --git a/arch/arm/boot/dts/nvidia/tegra124-venice2.dts b/arch/arm/boot/dts/nvidia/tegra124-venice2.dts index df98dc2a67b8..059ee6c5b13c 100644 --- a/arch/arm/boot/dts/nvidia/tegra124-venice2.dts +++ b/arch/arm/boot/dts/nvidia/tegra124-venice2.dts @@ -18,6 +18,11 @@ chosen { stdout-path = "serial0:115200n8"; }; + firmware { + #address-cells = <1>; + #size-cells = <1>; + }; + memory@80000000 { reg = <0x0 0x80000000 0x0 0x80000000>; };