[PATCH v2] powerpc: wii: Add the fixed OTP layout
From: Link Mauve <hidden>
Date: 2026-07-29 22:50:18
Also in:
linux-devicetree, lkml
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
These 128 bytes have a known fixed layout, so we can expose those as cells for either kernel or userspace consumption. Signed-off-by: Link Mauve <redacted> --- arch/powerpc/boot/dts/wii.dts | 42 +++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) Changes since v1: - Link to v1: https://lore.kernel.org/lkml/20260726181921.16269-1-linkmauve@linkmauve.fr/T/ (local) - Switch to using hyphens instead of underscores as it is preferred in device-trees. - Extend device-private-key@28 to 0x1e bytes instead of 0x1c, which is its correct size. - Document that this cell and the next one overlap for two bytes, and it’s expected.
diff --git a/arch/powerpc/boot/dts/wii.dts b/arch/powerpc/boot/dts/wii.dts
index 473d9feb9cdb..d3a94d94e9e1 100644
--- a/arch/powerpc/boot/dts/wii.dts
+++ b/arch/powerpc/boot/dts/wii.dts@@ -233,6 +233,48 @@ control@d800100 { otp@d8001ec { compatible = "nintendo,hollywood-otp"; reg = <0x0d8001ec 0x8>; + + nvmem-layout { + compatible = "fixed-layout"; + #address-cells = <1>; + #size-cells = <1>; + + boot1-sha1@0 { + reg = <0x00 0x14>; + }; + + common-key@14 { + reg = <0x14 0x10>; + }; + + device-id@24 { + reg = <0x24 0x4>; + }; + + /* + * device-private-key@28 and nand-hmac-key@44 + * overlap on two bytes, that’s expected. + */ + device-private-key@28 { + reg = <0x28 0x1e>; + }; + + nand-hmac-key@44 { + reg = <0x44 0x14>; + }; + + nand-key@58 { + reg = <0x58 0x10>; + }; + + backup-key@68 { + reg = <0x68 0x10>; + }; + + unknown@78 { + reg = <0x78 0x8>; + }; + }; }; disk@d806000 {
base-commit: 78bc8af4affb9a732504eb22eeac7d1e50883853 -- 2.55.0