diff --git a/Cargo.lock b/Cargo.lock
index a97dce8ece..aadb682102 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -6,11 +6,11 @@ version = 4
 name = "abi"
 version = "0.1.0"
 dependencies = [
- "bitflags 2.9.1",
+ "bitflags 2.9.4",
  "byteorder",
  "phash",
  "serde",
- "zerocopy 0.8.26",
+ "zerocopy 0.8.27",
 ]
 
 [[package]]
@@ -178,8 +178,8 @@ dependencies = [
  "num-traits",
  "serde",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -271,9 +271,9 @@ checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
 [[package]]
 name = "bitflags"
-version = "2.9.1"
+version = "2.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1b8e56985ec62d17e9c1001dc89c88ecd7dc08e47eba5ec7c29c7b5eeecde967"
+checksum = "2261d10cca569e4643e526d8dc2e62e433cc8aba21ab764233731f8d369bf394"
 
 [[package]]
 name = "bitvec"
@@ -337,7 +337,7 @@ dependencies = [
 name = "build-kconfig"
 version = "0.1.0"
 dependencies = [
- "bitflags 2.9.1",
+ "bitflags 2.9.4",
  "serde",
 ]
 
@@ -1007,8 +1007,8 @@ dependencies = [
  "sha3",
  "tlvc",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1026,8 +1026,8 @@ dependencies = [
  "stm32h7",
  "tlvc",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1069,8 +1069,8 @@ dependencies = [
  "serde",
  "stm32h7",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1106,8 +1106,8 @@ dependencies = [
  "task-jefe-api",
  "task-packrat-api",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1117,8 +1117,8 @@ dependencies = [
  "counters",
  "num-traits",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1132,8 +1132,8 @@ dependencies = [
  "idol-runtime",
  "num-traits",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1148,8 +1148,8 @@ dependencies = [
  "idol-runtime",
  "num-traits",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1165,8 +1165,8 @@ dependencies = [
  "sha3",
  "tlvc",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1183,7 +1183,7 @@ dependencies = [
  "num-traits",
  "ringbuf",
  "userlib",
- "zerocopy 0.8.26",
+ "zerocopy 0.8.27",
 ]
 
 [[package]]
@@ -1206,8 +1206,8 @@ dependencies = [
  "num-traits",
  "ringbuf",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1217,8 +1217,8 @@ dependencies = [
  "drv-fpga-api",
  "num-traits",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1237,8 +1237,8 @@ dependencies = [
  "serde",
  "stm32h7",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1279,8 +1279,8 @@ dependencies = [
  "task-jefe-api",
  "task-packrat-api",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1303,8 +1303,8 @@ dependencies = [
  "task-jefe-api",
  "task-packrat-api",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1317,8 +1317,8 @@ dependencies = [
  "idol-runtime",
  "num-traits",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1336,8 +1336,8 @@ dependencies = [
  "num-traits",
  "serde",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1348,8 +1348,8 @@ dependencies = [
  "counters",
  "drv-i2c-types",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1357,6 +1357,7 @@ name = "drv-i2c-devices"
 version = "0.1.0"
 dependencies = [
  "bitfield 0.13.2",
+ "counters",
  "derive-idol-err",
  "drv-i2c-api",
  "drv-onewire",
@@ -1367,8 +1368,8 @@ dependencies = [
  "smbus-pec",
  "task-power-api",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1413,8 +1414,8 @@ dependencies = [
  "serde",
  "static_assertions",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1432,8 +1433,8 @@ dependencies = [
  "mutable-statics",
  "num-traits",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1451,8 +1452,8 @@ dependencies = [
  "num-traits",
  "ringbuf",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1465,8 +1466,8 @@ dependencies = [
  "drv-oxide-vpd",
  "idol",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1489,8 +1490,8 @@ dependencies = [
  "num-traits",
  "serde",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1507,8 +1508,8 @@ dependencies = [
  "num-traits",
  "serde",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1521,8 +1522,8 @@ dependencies = [
  "lpc55-pac",
  "num-traits",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1539,8 +1540,8 @@ dependencies = [
  "rand_chacha",
  "rand_core",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1560,8 +1561,8 @@ dependencies = [
  "lpc55-pac",
  "num-traits",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1579,8 +1580,8 @@ dependencies = [
  "ringbuf",
  "serde",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1614,8 +1615,8 @@ dependencies = [
  "static_assertions",
  "task-jefe-api",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1624,7 +1625,7 @@ version = "0.1.0"
 dependencies = [
  "anyhow",
  "attest-api",
- "bitflags 2.9.1",
+ "bitflags 2.9.4",
  "build-lpc55pins",
  "build-util",
  "call_rustfmt",
@@ -1648,8 +1649,8 @@ dependencies = [
  "serde",
  "static_assertions",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1664,8 +1665,8 @@ dependencies = [
  "num-traits",
  "task-jefe-api",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1677,8 +1678,8 @@ dependencies = [
  "idol",
  "num-traits",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1697,8 +1698,8 @@ dependencies = [
  "serde",
  "stage0-handoff",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1716,15 +1717,15 @@ dependencies = [
  "nb 1.0.0",
  "serde",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
 name = "drv-mb85rsxx-fram"
 version = "0.1.0"
 dependencies = [
- "bitflags 2.9.1",
+ "bitflags 2.9.4",
  "counters",
  "drv-spi-api",
 ]
@@ -1742,8 +1743,8 @@ dependencies = [
  "idol-runtime",
  "num-traits",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1755,8 +1756,8 @@ dependencies = [
  "idol",
  "num-traits",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1772,8 +1773,8 @@ dependencies = [
  "num-traits",
  "serde",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1800,8 +1801,8 @@ dependencies = [
  "ringbuf",
  "serde",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1818,8 +1819,8 @@ dependencies = [
  "num-traits",
  "ringbuf",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1837,8 +1838,8 @@ dependencies = [
  "num-traits",
  "serde",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1862,8 +1863,8 @@ dependencies = [
  "serde",
  "serde_json",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1879,8 +1880,8 @@ dependencies = [
  "num-traits",
  "serde",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1894,8 +1895,8 @@ dependencies = [
  "num-traits",
  "task-jefe-api",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1912,8 +1913,8 @@ dependencies = [
  "userlib",
  "vsc7448",
  "vsc85xx",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1922,8 +1923,8 @@ version = "0.1.0"
 dependencies = [
  "num-traits",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1933,8 +1934,8 @@ dependencies = [
  "drv-onewire",
  "num-traits",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -1946,8 +1947,8 @@ dependencies = [
  "idol",
  "ringbuf",
  "tlvc",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -2016,8 +2017,8 @@ dependencies = [
  "num-traits",
  "rand_core",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -2036,8 +2037,8 @@ dependencies = [
  "num-traits",
  "ringbuf",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -2051,8 +2052,8 @@ dependencies = [
  "idol",
  "num-traits",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -2076,8 +2077,8 @@ dependencies = [
  "userlib",
  "vsc7448-pac",
  "vsc85xx",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -2100,8 +2101,8 @@ dependencies = [
  "serde",
  "serde_json",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -2128,8 +2129,8 @@ dependencies = [
  "num-traits",
  "serde",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -2157,8 +2158,8 @@ dependencies = [
  "ringbuf",
  "serde",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -2171,8 +2172,8 @@ dependencies = [
  "idol-runtime",
  "num-traits",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -2193,8 +2194,8 @@ dependencies = [
  "ringbuf",
  "task-config",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -2206,8 +2207,8 @@ dependencies = [
  "idol-runtime",
  "num-traits",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -2236,8 +2237,8 @@ dependencies = [
  "num-traits",
  "serde",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -2268,8 +2269,8 @@ dependencies = [
  "tlvc",
  "unwrap-lite",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -2280,8 +2281,8 @@ dependencies = [
  "stm32f3",
  "stm32f4",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -2293,8 +2294,8 @@ dependencies = [
  "stm32f3",
  "stm32f4",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -2308,8 +2309,8 @@ dependencies = [
  "num-traits",
  "stm32g0",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -2356,8 +2357,8 @@ dependencies = [
  "stm32h7",
  "userlib",
  "vcell",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -2375,8 +2376,8 @@ dependencies = [
  "num-traits",
  "stm32h7",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -2387,8 +2388,8 @@ dependencies = [
  "stm32h7",
  "userlib",
  "vcell",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -2405,8 +2406,8 @@ dependencies = [
  "stm32h7",
  "task-packrat-api",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -2417,8 +2418,8 @@ dependencies = [
  "ringbuf",
  "stm32h7",
  "vcell",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -2433,8 +2434,8 @@ dependencies = [
  "idol-runtime",
  "num-traits",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -2464,7 +2465,7 @@ dependencies = [
  "stm32h7",
  "syn 2.0.98",
  "userlib",
- "zerocopy 0.8.26",
+ "zerocopy 0.8.27",
 ]
 
 [[package]]
@@ -2491,8 +2492,8 @@ dependencies = [
  "ssmarshal",
  "static-cell",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -2519,8 +2520,8 @@ dependencies = [
  "serde",
  "stage0-handoff",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -2541,8 +2542,8 @@ dependencies = [
  "stm32g0",
  "stm32h7",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -2560,8 +2561,8 @@ dependencies = [
  "stm32g0",
  "stm32h7",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -2589,7 +2590,7 @@ dependencies = [
 name = "drv-stm32xx-sys"
 version = "0.1.0"
 dependencies = [
- "bitflags 2.9.1",
+ "bitflags 2.9.4",
  "build-stm32xx-sys",
  "build-util",
  "cfg-if",
@@ -2605,8 +2606,8 @@ dependencies = [
  "stm32h7",
  "task-jefe-api",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -2623,8 +2624,8 @@ dependencies = [
  "num-traits",
  "serde",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -2648,8 +2649,8 @@ dependencies = [
  "task-sensor-api",
  "transceiver-messages",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -2682,8 +2683,8 @@ dependencies = [
  "task-thermal-api",
  "transceiver-messages",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -2700,8 +2701,8 @@ dependencies = [
  "ringbuf",
  "serde",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -2722,8 +2723,8 @@ dependencies = [
  "stm32f4",
  "task-config",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -2735,8 +2736,8 @@ dependencies = [
  "idol",
  "num-traits",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -2753,8 +2754,8 @@ dependencies = [
  "num-traits",
  "serde",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -2770,8 +2771,8 @@ dependencies = [
  "num-traits",
  "serde",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -2859,7 +2860,7 @@ name = "endoscope-abi"
 version = "0.1.0"
 dependencies = [
  "sha3",
- "zerocopy 0.8.26",
+ "zerocopy 0.8.27",
 ]
 
 [[package]]
@@ -3004,17 +3005,17 @@ checksum = "e6d5a32815ae3f33302d95fdcb2ce17862f8c65363dcfd29360480ba1001fc9c"
 [[package]]
 name = "gateway-ereport-messages"
 version = "0.1.0"
-source = "git+https://github.com/oxidecomputer/management-gateway-service#57ffd1c24f3ad1919fb4a605d5a501f2c5deb54c"
+source = "git+https://github.com/oxidecomputer/management-gateway-service#f3a3cad67fa3099883b8fb7e69b7677498b0eefe"
 dependencies = [
- "zerocopy 0.8.26",
+ "zerocopy 0.8.27",
 ]
 
 [[package]]
 name = "gateway-messages"
 version = "0.1.0"
-source = "git+https://github.com/oxidecomputer/management-gateway-service#83fe1885c9916cebbee261c47a09d832d75b7df0"
+source = "git+https://github.com/oxidecomputer/management-gateway-service?branch=eliza%2Fvpd#0017c81be552980b9efbd5041ac72ce3dd061019"
 dependencies = [
- "bitflags 2.9.1",
+ "bitflags 2.9.4",
  "hubpack",
  "serde",
  "serde-big-array 0.5.1",
@@ -3024,7 +3025,7 @@ dependencies = [
  "strum",
  "strum_macros",
  "uuid",
- "zerocopy 0.8.26",
+ "zerocopy 0.8.27",
 ]
 
 [[package]]
@@ -3246,7 +3247,7 @@ dependencies = [
 name = "host-sp-messages"
 version = "0.1.0"
 dependencies = [
- "bitflags 2.9.1",
+ "bitflags 2.9.4",
  "counters",
  "drv-i2c-types",
  "fletcher",
@@ -3260,8 +3261,8 @@ dependencies = [
  "serde_repr",
  "static_assertions",
  "unwrap-lite",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -3330,8 +3331,8 @@ dependencies = [
  "serde",
  "serde-big-array 0.5.1",
  "static_assertions",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -3387,7 +3388,7 @@ source = "git+https://github.com/oxidecomputer/idolatry.git#b9fb439a8b6d77d10c92
 dependencies = [
  "counters",
  "userlib",
- "zerocopy 0.8.26",
+ "zerocopy 0.8.27",
 ]
 
 [[package]]
@@ -3492,7 +3493,7 @@ dependencies = [
  "abi",
  "anyhow",
  "armv8-m-mpu",
- "bitflags 2.9.1",
+ "bitflags 2.9.4",
  "build-kconfig",
  "build-util",
  "byteorder",
@@ -3510,8 +3511,8 @@ dependencies = [
  "ssmarshal",
  "syn 2.0.98",
  "unwrap-lite",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -3565,8 +3566,8 @@ dependencies = [
  "static_assertions",
  "unwrap-lite",
  "vcell",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
  "zeroize",
 ]
 
@@ -3630,8 +3631,8 @@ dependencies = [
  "cfg-if",
  "proc-macro2",
  "quote",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -3687,8 +3688,8 @@ dependencies = [
  "static_assertions",
  "toml",
  "unwrap-lite",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
  "zeroize",
 ]
 
@@ -3719,8 +3720,8 @@ dependencies = [
  "task-jefe-api",
  "tlvc",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -4140,7 +4141,7 @@ version = "0.1.0"
 dependencies = [
  "hubpack",
  "serde",
- "zerocopy 0.8.26",
+ "zerocopy 0.8.27",
 ]
 
 [[package]]
@@ -5168,8 +5169,8 @@ dependencies = [
  "serde",
  "stm32h7",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -5180,20 +5181,19 @@ checksum = "73473c0e59e6d5812c5dfe2a064a6444949f089e20eec9a2e5506596494e4623"
 
 [[package]]
 name = "strum"
-version = "0.27.1"
+version = "0.27.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f64def088c51c9510a8579e3c5d67c65349dcf755e5479ad3d010aa6454e2c32"
+checksum = "af23d6f6c1a224baef9d3f61e287d2761385a5b88fdab4eb4c6f11aeb54c4bcf"
 
 [[package]]
 name = "strum_macros"
-version = "0.27.1"
+version = "0.27.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c77a8c5abcaf0f9ce05d62342b7d298c346515365c36b673df4ebe3ced01fde8"
+checksum = "7695ce3845ea4b33927c055a39dc438a45b059f7c1b3d91d38d10355fb8cbca7"
 dependencies = [
  "heck 0.5.0",
  "proc-macro2",
  "quote",
- "rustversion",
  "syn 2.0.98",
 ]
 
@@ -5254,8 +5254,8 @@ dependencies = [
  "static-cell",
  "unwrap-lite",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -5275,6 +5275,7 @@ name = "task-control-plane-agent"
 version = "0.1.0"
 dependencies = [
  "anyhow",
+ "build-i2c",
  "build-util",
  "cfg-if",
  "counters",
@@ -5283,9 +5284,12 @@ dependencies = [
  "drv-caboose-pos",
  "drv-cpu-seq-api",
  "drv-hf-api",
+ "drv-i2c-api",
+ "drv-i2c-devices",
  "drv-ignition-api",
  "drv-lpc55-update-api",
  "drv-monorail-api",
+ "drv-oxide-vpd",
  "drv-rng-api",
  "drv-sidecar-seq-api",
  "drv-sprot-api",
@@ -5304,6 +5308,7 @@ dependencies = [
  "idol-runtime",
  "lpc55-rom-data",
  "num-traits",
+ "oxide-barcode",
  "p256",
  "ringbuf",
  "serde",
@@ -5319,10 +5324,11 @@ dependencies = [
  "task-sensor-api",
  "task-validate-api",
  "task-vpd-api",
+ "tlvc",
  "update-buffer",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -5339,8 +5345,8 @@ dependencies = [
  "serde",
  "ssmarshal",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -5362,8 +5368,8 @@ dependencies = [
  "task-packrat-api",
  "task-sensor-api",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -5389,8 +5395,8 @@ dependencies = [
  "task-jefe-api",
  "task-net-api",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -5409,8 +5415,8 @@ dependencies = [
  "ringbuf",
  "serde",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -5425,8 +5431,8 @@ dependencies = [
  "ringbuf",
  "task-packrat-api",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -5509,8 +5515,8 @@ dependencies = [
  "static-cell",
  "test-api",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -5557,8 +5563,8 @@ dependencies = [
  "task-sensor-api",
  "tlvc",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -5573,8 +5579,8 @@ dependencies = [
  "num-traits",
  "ssmarshal",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -5606,8 +5612,8 @@ dependencies = [
  "ssmarshal",
  "task-jefe-api",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -5625,8 +5631,8 @@ dependencies = [
  "serde",
  "ssmarshal",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -5656,8 +5662,8 @@ dependencies = [
  "vsc7448",
  "vsc7448-pac",
  "vsc85xx",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -5704,8 +5710,8 @@ dependencies = [
  "userlib",
  "vsc7448-pac",
  "vsc85xx",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -5727,8 +5733,8 @@ dependencies = [
  "smoltcp",
  "task-packrat-api",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -5771,8 +5777,8 @@ dependencies = [
  "static_assertions",
  "task-packrat-api",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -5789,8 +5795,8 @@ dependencies = [
  "num-traits",
  "oxide-barcode",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -5842,8 +5848,8 @@ dependencies = [
  "task-power-api",
  "task-sensor-api",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -5861,8 +5867,8 @@ dependencies = [
  "static_assertions",
  "task-sensor-api",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -5885,8 +5891,8 @@ dependencies = [
  "serde",
  "task-sensor-api",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -5906,8 +5912,8 @@ dependencies = [
  "num-traits",
  "serde",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -5924,8 +5930,8 @@ dependencies = [
  "ringbuf",
  "task-sensor-api",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -5941,8 +5947,8 @@ dependencies = [
  "task-net-api",
  "task-packrat-api",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -5972,7 +5978,7 @@ name = "task-thermal"
 version = "0.1.0"
 dependencies = [
  "anyhow",
- "bitflags 2.9.1",
+ "bitflags 2.9.4",
  "build-i2c",
  "build-util",
  "cortex-m",
@@ -5994,8 +6000,8 @@ dependencies = [
  "task-sensor-api",
  "task-thermal-api",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -6013,8 +6019,8 @@ dependencies = [
  "serde",
  "task-sensor-api",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -6045,8 +6051,8 @@ dependencies = [
  "task-net-api",
  "task-packrat-api",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -6070,8 +6076,8 @@ dependencies = [
  "idol",
  "task-net-api",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -6093,8 +6099,8 @@ dependencies = [
  "serde",
  "task-validate-api",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -6106,6 +6112,7 @@ dependencies = [
  "counters",
  "derive-idol-err",
  "drv-i2c-api",
+ "drv-i2c-devices",
  "gateway-messages",
  "hubpack",
  "idol",
@@ -6114,8 +6121,8 @@ dependencies = [
  "serde",
  "task-sensor-api",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -6135,8 +6142,8 @@ dependencies = [
  "ringbuf",
  "task-vpd-api",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -6150,8 +6157,8 @@ dependencies = [
  "idol-runtime",
  "num-traits",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -6180,8 +6187,8 @@ dependencies = [
  "build-util",
  "num-traits",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -6194,8 +6201,8 @@ dependencies = [
  "num-traits",
  "test-api",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -6210,8 +6217,8 @@ dependencies = [
  "serde",
  "ssmarshal",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -6226,8 +6233,8 @@ dependencies = [
  "ssmarshal",
  "test-idol-api",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -6243,8 +6250,8 @@ dependencies = [
  "ringbuf",
  "test-api",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -6264,8 +6271,8 @@ dependencies = [
  "test-api",
  "test-idol-api",
  "userlib",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -6495,7 +6502,7 @@ name = "transceiver-messages"
 version = "0.1.1"
 source = "git+https://github.com/oxidecomputer/transceiver-control/#c5564eb96ddc7887a02596cc039662c87e906d0c"
 dependencies = [
- "bitflags 2.9.1",
+ "bitflags 2.9.4",
  "hubpack",
  "serde",
 ]
@@ -6553,8 +6560,8 @@ dependencies = [
  "ssmarshal",
  "unwrap-lite",
  "volatile-const",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -6643,8 +6650,8 @@ dependencies = [
  "userlib",
  "vsc-err",
  "vsc7448-pac",
- "zerocopy 0.8.26",
- "zerocopy-derive 0.8.26",
+ "zerocopy 0.8.27",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -7032,7 +7039,7 @@ dependencies = [
  "toml-task",
  "toml_edit",
  "walkdir",
- "zerocopy 0.8.26",
+ "zerocopy 0.8.27",
  "zip",
 ]
 
@@ -7058,11 +7065,11 @@ dependencies = [
 
 [[package]]
 name = "zerocopy"
-version = "0.8.26"
+version = "0.8.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1039dd0d3c310cf05de012d8a39ff557cb0d23087fd44cad61df08fc31907a2f"
+checksum = "0894878a5fa3edfd6da3f88c4805f4c8558e2b996227a3d864f47fe11e38282c"
 dependencies = [
- "zerocopy-derive 0.8.26",
+ "zerocopy-derive 0.8.27",
 ]
 
 [[package]]
@@ -7089,9 +7096,9 @@ dependencies = [
 
 [[package]]
 name = "zerocopy-derive"
-version = "0.8.26"
+version = "0.8.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9ecf5b4cc5364572d7f4c329661bcc82724222973f2cab6f050a4e5c22f75181"
+checksum = "88d2b8d9c68ad2b9e4340d7832716a4d21a22a1154777ad56ea55c51a9cf3831"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/Cargo.toml b/Cargo.toml
index bdf1031473..084c24d282 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -145,7 +145,7 @@ zip = { version = "0.6", default-features = false, features = ["bzip2", "deflate
 # Oxide forks and repos
 attest-data = { git = "https://github.com/oxidecomputer/dice-util", default-features = false, version = "0.4.0" }
 dice-mfg-msgs = { git = "https://github.com/oxidecomputer/dice-util", default-features = false, version = "0.2.1" }
-gateway-messages = { git = "https://github.com/oxidecomputer/management-gateway-service", default-features = false, features = ["smoltcp"] }
+gateway-messages = { git = "https://github.com/oxidecomputer/management-gateway-service", default-features = false, features = ["smoltcp"], branch = "eliza/vpd" }
 gateway-ereport-messages = { git = "https://github.com/oxidecomputer/management-gateway-service", default-features = false }
 gimlet-inspector-protocol = { git = "https://github.com/oxidecomputer/gimlet-inspector-protocol", version = "0.1.0" }
 hif = { git = "https://github.com/oxidecomputer/hif", default-features = false }
diff --git a/app/gimlet/base.toml b/app/gimlet/base.toml
index 20ebe24b20..a31f399474 100644
--- a/app/gimlet/base.toml
+++ b/app/gimlet/base.toml
@@ -287,6 +287,7 @@ task-slots = [
     "packrat",
     "user_leds",
     "vpd",
+    "i2c_driver",
 ]
 features = [
     "gimlet",
@@ -489,6 +490,7 @@ description = "U.2 Sharkfin A VPD"
 name = "sharkfin_a_vpd"
 refdes = ["J206", "U7"]
 removable = true
+fruid = "single-barcode"
 
 [[config.i2c.devices]]
 bus = "front"
@@ -525,6 +527,7 @@ description = "U.2 Sharkfin B VPD"
 name = "sharkfin_b_vpd"
 refdes = ["J207", "U7"]
 removable = true
+fruid = "single-barcode"
 
 [[config.i2c.devices]]
 bus = "front"
@@ -561,6 +564,7 @@ description = "U.2 Sharkfin C VPD"
 name = "sharkfin_c_vpd"
 refdes = ["J208", "U7"]
 removable = true
+fruid = "single-barcode"
 
 [[config.i2c.devices]]
 bus = "front"
@@ -597,6 +601,7 @@ description = "U.2 Sharkfin D VPD"
 name = "sharkfin_d_vpd"
 refdes = ["J209", "U7"]
 removable = true
+fruid = "single-barcode"
 
 [[config.i2c.devices]]
 bus = "front"
@@ -633,6 +638,7 @@ description = "U.2 Sharkfin E VPD"
 name = "sharkfin_e_vpd"
 refdes = ["J210", "U7"]
 removable = true
+fruid = "single-barcode"
 
 [[config.i2c.devices]]
 bus = "front"
@@ -669,6 +675,7 @@ description = "U.2 Sharkfin F VPD"
 name = "sharkfin_f_vpd"
 refdes = ["J211", "U7"]
 removable = true
+fruid = "single-barcode"
 
 [[config.i2c.devices]]
 bus = "front"
@@ -705,6 +712,7 @@ description = "U.2 Sharkfin G VPD"
 name = "sharkfin_g_vpd"
 refdes = ["J212", "U7"]
 removable = true
+fruid = "single-barcode"
 
 [[config.i2c.devices]]
 bus = "front"
@@ -741,6 +749,7 @@ description = "U.2 Sharkfin H VPD"
 name = "sharkfin_h_vpd"
 refdes = ["J213", "U7"]
 removable = true
+fruid = "single-barcode"
 
 [[config.i2c.devices]]
 bus = "front"
@@ -777,6 +786,7 @@ description = "U.2 Sharkfin I VPD"
 name = "sharkfin_i_vpd"
 refdes = ["J214", "U7"]
 removable = true
+fruid = "single-barcode"
 
 [[config.i2c.devices]]
 bus = "front"
@@ -813,6 +823,7 @@ description = "U.2 Sharkfin J VPD"
 name = "sharkfin_j_vpd"
 refdes = ["J215", "U7"]
 removable = true
+fruid = "single-barcode"
 
 [[config.i2c.devices]]
 bus = "front"
@@ -848,6 +859,7 @@ device = "at24csw080"
 name = "local_vpd"
 description = "Gimlet VPD"
 refdes = "U615"
+fruid = "single-barcode"
 
 #
 # M.2 NVMe bus mux. Segments:
diff --git a/app/psc/base.toml b/app/psc/base.toml
index cb69afe472..6429ec6d6a 100644
--- a/app/psc/base.toml
+++ b/app/psc/base.toml
@@ -219,6 +219,7 @@ task-slots = [
     "packrat",
     "user_leds",
     "vpd",
+    "i2c_driver",
 ]
 features = ["psc", "vlan", "vpd"]
 notifications = ["usart-irq", "socket", "timer"]
@@ -410,6 +411,7 @@ description = "PSU 0 MCU"
 power = { rails = [ "V54_PSU0", "V12_PSU0" ], sensors = ["voltage", "current", "input-voltage", "input-current"] }
 sensors = { input-voltage = 2, input-current = 2, voltage = 2, current = 2, temperature = 3, speed = 2 }
 refdes = "PSU0"
+fruid = "pmbus"
 
 [[config.i2c.devices]]
 bus = "backplane"
@@ -428,6 +430,7 @@ description = "PSU 1 MCU"
 power = { rails = [ "V54_PSU1", "V12_PSU1" ], sensors = ["voltage", "current", "input-voltage", "input-current"] }
 sensors = { input-voltage = 2, input-current = 2, voltage = 2, current = 2, temperature = 3, speed = 2 }
 refdes = "PSU1"
+fruid = "pmbus"
 
 [[config.i2c.devices]]
 bus = "backplane"
@@ -446,6 +449,7 @@ description = "PSU 2 MCU"
 power = { rails = [ "V54_PSU2", "V12_PSU2" ], sensors = ["voltage", "current", "input-voltage", "input-current"] }
 sensors = { input-voltage = 2, input-current = 2, voltage = 2, current = 2, temperature = 3, speed = 2 }
 refdes = "PSU2"
+fruid = "pmbus"
 
 [[config.i2c.devices]]
 bus = "backplane"
@@ -464,6 +468,7 @@ description = "PSU 3 MCU"
 power = { rails = [ "V54_PSU3", "V12_PSU3" ], sensors = ["voltage", "current", "input-voltage", "input-current"] }
 sensors = { input-voltage = 2, input-current = 2, voltage = 2, current = 2, temperature = 3, speed = 2 }
 refdes = "PSU3"
+fruid = "pmbus"
 
 [[config.i2c.devices]]
 bus = "backplane"
@@ -500,6 +505,7 @@ description = "PSU 5 MCU"
 power = { rails = [ "V54_PSU5", "V12_PSU5" ], sensors = ["voltage", "current", "input-voltage", "input-current"] }
 sensors = { input-voltage = 2, input-current = 2, voltage = 2, current = 2, temperature = 3, speed = 2 }
 refdes = "PSU5"
+fruid = "pmbus"
 
 [config.spi.spi2]
 controller = 2
diff --git a/build/i2c/src/lib.rs b/build/i2c/src/lib.rs
index d2618ce240..74a3e66ea4 100644
--- a/build/i2c/src/lib.rs
+++ b/build/i2c/src/lib.rs
@@ -108,6 +108,9 @@ struct I2cDevice {
     /// device is removable
     #[serde(default)]
     removable: bool,
+
+    /// how to read FRUID VPD from the device, if any
+    fruid: Option<FruidMode>,
 }
 
 impl I2cDevice {
@@ -224,11 +227,19 @@ struct I2cSensors {
 
 #[derive(Clone, Debug, Deserialize, Hash, PartialOrd, PartialEq, Eq, Ord)]
 #[serde(untagged)]
-enum Refdes {
+pub enum Refdes {
     Component(String),
     Path(Vec<String>),
 }
 
+#[derive(Clone, Debug, Deserialize, PartialOrd, Ord, Eq, PartialEq)]
+#[serde(rename_all = "kebab-case")]
+pub enum FruidMode {
+    SingleBarcode,
+    NestedBarcode,
+    Pmbus,
+}
+
 impl I2cSensors {
     /// Checks whether two sensor sets are compatible
     ///
@@ -1775,8 +1786,9 @@ pub struct I2cDeviceDescription {
     pub device: String,
     pub description: String,
     pub sensors: Vec<DeviceSensor>,
-    pub device_id: Option<String>,
+    pub device_id: Option<Refdes>,
     pub name: Option<String>,
+    pub fruid: Option<FruidMode>,
 }
 
 ///
@@ -1794,15 +1806,13 @@ pub fn device_descriptions() -> impl Iterator<Item = I2cDeviceDescription> {
     // Matches the ordering of the `match` produced by `generate_validation()`
     // above; if we change the order here, it must change there as well.
     g.devices.into_iter().zip(sensors.device_sensors).map(
-        |(device, sensors)| {
-            let device_id = device.refdes.as_ref().map(Refdes::to_component_id);
-            I2cDeviceDescription {
-                device: device.device,
-                description: device.description,
-                sensors,
-                device_id,
-                name: device.name,
-            }
+        |(device, sensors)| I2cDeviceDescription {
+            device: device.device,
+            description: device.description,
+            sensors,
+            device_id: device.refdes.clone(),
+            fruid: device.fruid,
+            name: device.name,
         },
     )
 }
@@ -1838,15 +1848,15 @@ where
 }
 
 impl Refdes {
-    fn to_component_id(&self) -> String {
+    pub fn to_component_id(&self) -> String {
         self.join_with_case(str::make_ascii_uppercase, "/")
     }
 
-    fn to_upper_ident(&self) -> String {
+    pub fn to_upper_ident(&self) -> String {
         self.join_with_case(str::make_ascii_uppercase, "_")
     }
 
-    fn to_lower_ident(&self) -> String {
+    pub fn to_lower_ident(&self) -> String {
         self.join_with_case(str::make_ascii_lowercase, "_")
     }
 
diff --git a/drv/i2c-devices/Cargo.toml b/drv/i2c-devices/Cargo.toml
index bcd62bcda9..91752b97fe 100644
--- a/drv/i2c-devices/Cargo.toml
+++ b/drv/i2c-devices/Cargo.toml
@@ -16,6 +16,7 @@ derive-idol-err = { path = "../../lib/derive-idol-err" }
 drv-i2c-api = { path = "../i2c-api" }
 drv-onewire = { path = "../onewire" }
 ringbuf = { path = "../../lib/ringbuf" }
+counters = { path = "../../lib/counters" }
 task-power-api = { path = "../../task/power-api" }
 userlib = { path = "../../sys/userlib" }
 
diff --git a/drv/i2c-devices/src/lib.rs b/drv/i2c-devices/src/lib.rs
index 1a320122ce..4958eff323 100644
--- a/drv/i2c-devices/src/lib.rs
+++ b/drv/i2c-devices/src/lib.rs
@@ -233,6 +233,117 @@ pub trait Validate<T: core::convert::Into<drv_i2c_api::ResponseCode>> {
     }
 }
 
+#[derive(Copy, Clone, Eq, PartialEq, counters::Count)]
+pub enum PmbusVpdError {
+    I2c {
+        cmd: PmbusVpdCmd,
+        #[count(children)]
+        err: drv_i2c_api::ResponseCode,
+    },
+    InvalidStr {
+        cmd: PmbusVpdCmd,
+    },
+    BufferTooSmall {
+        cmd: PmbusVpdCmd,
+    },
+}
+
+#[derive(
+    Copy,
+    Clone,
+    Eq,
+    PartialEq,
+    zerocopy_derive::IntoBytes,
+    zerocopy_derive::Immutable,
+    counters::Count,
+)]
+#[repr(u8)]
+pub enum PmbusVpdCmd {
+    MfrId = pmbus::CommandCode::MFR_ID as u8,
+    MfrModel = pmbus::CommandCode::MFR_MODEL as u8,
+    MfrRevision = pmbus::CommandCode::MFR_REVISION as u8,
+    MfrSerial = pmbus::CommandCode::MFR_SERIAL as u8,
+}
+
+pub struct PmbusVpd<'buf> {
+    pub mfr: &'buf str,
+    pub mpn: &'buf str,
+    pub rev: &'buf str,
+    pub serial: &'buf str,
+}
+
+impl<'buf> PmbusVpd<'buf> {
+    /// SMBus block reads may not be longer than 32 bytes.
+    const BLOCK_LEN: usize = 32;
+    /// Maximum length currently required to read a complete set of VPD
+    /// registers from a PMBus device.
+    ///
+    /// Currently, this is 4 32-byte blocks (`MFR_ID`, `MFR_MODEL`,
+    /// `MFR_REVISION`, and `MFR_SERIAL`). If more values are added in the
+    /// future, this will need to be embiggened.
+    pub const MAX_LEN: usize = Self::BLOCK_LEN * 4;
+
+    pub fn read_from(
+        dev: &I2cDevice,
+        buf: &'buf mut [u8],
+    ) -> Result<Self, PmbusVpdError> {
+        use core::ops::Range;
+
+        fn read(
+            dev: &drv_i2c_api::I2cDevice,
+            cmd: PmbusVpdCmd,
+            buf: &mut [u8],
+            curr_off: &mut usize,
+        ) -> Result<Range<usize>, PmbusVpdError> {
+            let off = *curr_off;
+            // PMBus block reads may not be longer than 32 bytes. Clamp this
+            // down as `drv_i2c_api` gets mad if it sees a lease of >255B.
+            let Some(block) = buf.get_mut(off..off + PmbusVpd::BLOCK_LEN)
+            else {
+                return Err(PmbusVpdError::BufferTooSmall { cmd });
+            };
+            let len = dev
+                .read_block(cmd, block)
+                .map_err(|err| PmbusVpdError::I2c { cmd, err })?;
+            *curr_off += len;
+            Ok(off..*curr_off)
+        }
+
+        let mut off = 0;
+        let mfr_range = read(dev, PmbusVpdCmd::MfrId, buf, &mut off)?;
+        let mpn_range = read(dev, PmbusVpdCmd::MfrModel, buf, &mut off)?;
+        let rev_range = read(dev, PmbusVpdCmd::MfrRevision, buf, &mut off)?;
+        let serial_range = read(dev, PmbusVpdCmd::MfrSerial, buf, &mut off)?;
+        let mfr = core::str::from_utf8(&buf[mfr_range]).map_err(|_| {
+            PmbusVpdError::InvalidStr {
+                cmd: PmbusVpdCmd::MfrId,
+            }
+        })?;
+        let mpn = core::str::from_utf8(&buf[mpn_range]).map_err(|_| {
+            PmbusVpdError::InvalidStr {
+                cmd: PmbusVpdCmd::MfrModel,
+            }
+        })?;
+        let rev = core::str::from_utf8(&buf[rev_range]).map_err(|_| {
+            PmbusVpdError::InvalidStr {
+                cmd: PmbusVpdCmd::MfrRevision,
+            }
+        })?;
+        let serial =
+            core::str::from_utf8(&buf[serial_range]).map_err(|_| {
+                PmbusVpdError::InvalidStr {
+                    cmd: PmbusVpdCmd::MfrSerial,
+                }
+            })?;
+        Ok(Self {
+            mfr,
+            mpn,
+            rev,
+            serial,
+        })
+    }
+}
+
 pub mod adm1272;
 pub mod adt7420;
 pub mod at24csw080;
diff --git a/drv/i2c-devices/src/mwocp68.rs b/drv/i2c-devices/src/mwocp68.rs
index 516612014d..f7f85e896c 100644
--- a/drv/i2c-devices/src/mwocp68.rs
+++ b/drv/i2c-devices/src/mwocp68.rs
@@ -31,7 +31,10 @@ pub struct Mwocp68 {
 pub struct FirmwareRev(pub [u8; 4]);
 
 #[derive(Copy, Clone, PartialEq, Default)]
-pub struct SerialNumber(pub [u8; 12]);
+pub struct SerialNumber(pub [u8; SERIAL_LEN]);
+
+const SERIAL_LEN: usize = 12;
+const REVISION_LEN: usize = 14;
 
 //
 // The boot loader command -- sent via BOOT_LOADER_CMD -- is unfortunately odd
@@ -481,8 +484,6 @@ impl Mwocp68 {
     /// Returns the firmware revision of the primary MCU (AC input side).
     ///
     pub fn firmware_revision(&self) -> Result<FirmwareRev, Error> {
-        const REVISION_LEN: usize = 14;
-
         let mut data = [0u8; REVISION_LEN];
         let expected = b"XXXX-YYYY-0000";
 
diff --git a/task/control-plane-agent/Cargo.toml b/task/control-plane-agent/Cargo.toml
index 519193ceac..18582a2eda 100644
--- a/task/control-plane-agent/Cargo.toml
+++ b/task/control-plane-agent/Cargo.toml
@@ -14,6 +14,7 @@ num-traits.workspace = true
 serde.workspace = true
 ssmarshal.workspace = true
 static_assertions.workspace = true
+tlvc.workspace = true
 zerocopy.workspace = true
 zerocopy-derive.workspace = true
 
@@ -25,9 +26,12 @@ drv-caboose = { path = "../../drv/caboose" }
 drv-caboose-pos = { path = "../../drv/caboose-pos" }
 drv-hf-api = { path = "../../drv/hf-api", optional = true }
 drv-cpu-seq-api = { path = "../../drv/cpu-seq-api", optional = true }
+drv-i2c-api = { path = "../../drv/i2c-api" }
+drv-i2c-devices = { path = "../../drv/i2c-devices" }
 drv-ignition-api = { path = "../../drv/ignition-api", optional = true }
 drv-lpc55-update-api = { path = "../../drv/lpc55-update-api" }
 drv-monorail-api = { path = "../../drv/monorail-api", optional = true }
+drv-oxide-vpd = { path = "../../drv/oxide-vpd" }
 drv-sidecar-seq-api = { path = "../../drv/sidecar-seq-api", optional = true }
 drv-sprot-api = { path = "../../drv/sprot-api" }
 drv-stm32h7-update-api = { path = "../../drv/stm32h7-update-api" }
@@ -40,6 +44,7 @@ dump-agent-api = { path = "../dump-agent-api" }
 task-vpd-api = { path = "../../task/vpd-api", optional = true }
 host-sp-messages = { path = "../../lib/host-sp-messages" }
 lpc55-rom-data = { path = "../../lib/lpc55-rom-data" }
+oxide-barcode = { path = "../../lib/oxide-barcode" }
 ringbuf = { path = "../../lib/ringbuf" }
 counters = { path = "../../lib/counters" }
 task-control-plane-agent-api = { path = "../control-plane-agent-api" }
@@ -47,13 +52,14 @@ task-jefe-api = { path = "../jefe-api" }
 task-net-api = { path = "../net-api", features = ["use-smoltcp"] }
 task-packrat-api = { path = "../packrat-api" }
 task-sensor-api = { path = "../sensor-api" }
-task-validate-api = { path = "../validate-api" }
+task-validate-api = { path = "../validate-api", features = ["fruid"] }
 update-buffer = { path = "../../lib/update-buffer" }
 userlib = { path = "../../sys/userlib", features = ["panic-messages"] }
 static-cell = { path = "../../lib/static-cell" }
 
 [build-dependencies]
 build-util = { path = "../../build/util" }
+build-i2c = { path = "../../build/i2c" }
 anyhow = { workspace = true }
 idol = { workspace = true }
 serde = { workspace = true }
diff --git a/task/control-plane-agent/build.rs b/task/control-plane-agent/build.rs
index fe7368fded..89bac9dcb3 100644
--- a/task/control-plane-agent/build.rs
+++ b/task/control-plane-agent/build.rs
@@ -35,6 +35,12 @@ fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
     if let Some(cfg) = cfg {
         write_keys(cfg)?;
     }
+
+    let disposition = build_i2c::Disposition::Devices;
+    if let Err(e) = build_i2c::codegen(disposition) {
+        println!("cargo::error=I2C code generation failed: {e}");
+        std::process::exit(1);
+    }
     Ok(())
 }
 
diff --git a/task/control-plane-agent/src/inventory.rs b/task/control-plane-agent/src/inventory.rs
index 0832192500..78b634ca03 100644
--- a/task/control-plane-agent/src/inventory.rs
+++ b/task/control-plane-agent/src/inventory.rs
@@ -2,34 +2,50 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this
 // file, You can obtain one at https://mozilla.org/MPL/2.0/.
 
+use drv_i2c_api::{self as i2c, I2cDevice};
+use drv_i2c_devices::at24csw080::At24Csw080;
+use drv_i2c_devices::PmbusVpd;
 use gateway_messages::measurement::{
     Measurement, MeasurementError, MeasurementKind,
 };
 use gateway_messages::sp_impl::{BoundsChecked, DeviceDescription};
+use gateway_messages::vpd::{MfgVpd, OxideVpd, Tmp117Vpd, Vpd, VpdReadError};
 use gateway_messages::{
     ComponentDetails, DeviceCapabilities, DevicePresence, SpComponent, SpError,
 };
+use ringbuf::ringbuf_entry_root;
 use task_sensor_api::Sensor as SensorTask;
 use task_sensor_api::SensorError;
+use task_validate_api::FruidMode;
 use task_validate_api::{Sensor, DEVICES as VALIDATE_DEVICES};
 use task_validate_api::{Validate, ValidateError, ValidateOk};
 use userlib::UnwrapLite;
 
 userlib::task_slot!(VALIDATE, validate);
 userlib::task_slot!(SENSOR, sensor);
+userlib::task_slot!(I2C, i2c_driver);
 
 pub(crate) struct Inventory {
     validate_task: Validate,
     sensor_task: SensorTask,
+    fruid_buf: &'static mut [u8; PmbusVpd::MAX_LEN],
 }
 
 impl Inventory {
     pub(crate) fn new() -> Self {
         let () = devices_with_static_validation::ASSERT_EACH_DEVICE_FITS_IN_ONE_PACKET;
 
+        let fruid_buf = {
+            use static_cell::ClaimOnceCell;
+            static BUF: ClaimOnceCell<[u8; PmbusVpd::MAX_LEN]> =
+                ClaimOnceCell::new([0; PmbusVpd::MAX_LEN]);
+            BUF.claim()
+        };
+
         Self {
             validate_task: Validate::from(VALIDATE.get_task_id()),
             sensor_task: SensorTask::from(SENSOR.get_task_id()),
+            fruid_buf,
         }
     }
 
@@ -44,16 +60,25 @@ impl Inventory {
         match Index::try_from(component)? {
             Index::OurDevice(_) => Ok(0),
             Index::ValidateDevice(i) => {
-                Ok(VALIDATE_DEVICES[i].sensors.len() as u32)
+                let dev = &VALIDATE_DEVICES[i];
+                let nsensors = dev.sensors.len() as u32;
+                let nfruid = match dev.fruid {
+                    Some(FruidMode::At24Csw080Barcode(_)) => 1,
+                    Some(FruidMode::At24Csw080Nested(_)) => 0, // TODO(eliza): implement nested SASY barcodes
+                    Some(FruidMode::Tmp117(_)) => 1,
+                    Some(FruidMode::Pmbus(_)) => 1,
+                    None => 0,
+                };
+                Ok(nsensors + nfruid)
             }
         }
     }
 
-    pub(crate) fn component_details(
-        &self,
+    pub(crate) fn component_details<'buf>(
+        &'buf mut self,
         component: &SpComponent,
         component_index: BoundsChecked,
-    ) -> ComponentDetails {
+    ) -> ComponentDetails<&'buf str> {
         // `component_index` is guaranteed to be in the range
         // `0..num_component_details(component)`, and we only return a value
         // greater than 0 from that method for indices in the VALIDATE_DEVICES
@@ -64,20 +89,90 @@ impl Inventory {
             Ok(Index::ValidateDevice(i)) => i,
             Ok(Index::OurDevice(_)) | Err(_) => panic!(),
         };
+        let device = &VALIDATE_DEVICES[val_device_index];
+        // First, measurement channels...
+        if let Some(sensor_description) =
+            device.sensors.get(component_index.0 as usize)
+        {
+            let value = self
+                .sensor_task
+                .get(sensor_description.id)
+                .map_err(|err| SensorErrorConvert(err).into());
+
+            return ComponentDetails::Measurement(Measurement {
+                name: sensor_description.name.unwrap_or(""),
+                kind: MeasurementKindConvert(sensor_description.kind).into(),
+                value,
+            });
+        }
 
-        let sensor_description = &VALIDATE_DEVICES[val_device_index].sensors
-            [component_index.0 as usize];
-
-        let value = self
-            .sensor_task
-            .get(sensor_description.id)
-            .map_err(|err| SensorErrorConvert(err).into());
+        // If the index is greater than the maximum number of measurement
+        // channels, it must be a FRUID.
+        let Some(fruid) = device.fruid else {
+            // Index is bounds-checked.
+            unreachable!()
+        };
 
-        ComponentDetails::Measurement(Measurement {
-            name: sensor_description.name.unwrap_or(""),
-            kind: MeasurementKindConvert(sensor_description.kind).into(),
-            value,
-        })
+        match fruid {
+            FruidMode::At24Csw080Barcode(f) => {
+                let dev = f(I2C.get_task_id());
+                match read_one_barcode(dev, &[(*b"BARC", 0)]) {
+                    Ok(oxide_barcode::VpdIdentity {
+                        revision,
+                        serial,
+                        part_number,
+                    }) => ComponentDetails::Vpd(Vpd::Oxide(OxideVpd {
+                        rev: revision,
+                        serial,
+                        part_number,
+                    })),
+                    Err(err) => ComponentDetails::Vpd(Vpd::Err(err)),
+                }
+            }
+            FruidMode::At24Csw080Nested(_) => todo!(),
+            FruidMode::Tmp117(f) => {
+                let dev = f(I2C.get_task_id());
+                match read_tmp117_fruid(dev) {
+                    Ok(vpd) => ComponentDetails::Vpd(Vpd::Tmp117(vpd)),
+                    Err(err) => ComponentDetails::Vpd(Vpd::Err(err)),
+                }
+            }
+            FruidMode::Pmbus(f) => {
+                use drv_i2c_devices::{PmbusVpd, PmbusVpdError};
+                let dev = f(I2C.get_task_id());
+
+                match drv_i2c_devices::PmbusVpd::read_from(&dev, self.fruid_buf)
+                {
+                    Ok(PmbusVpd {
+                        mpn,
+                        mfr,
+                        serial,
+                        rev,
+                    }) => ComponentDetails::Vpd(Vpd::Mfg(MfgVpd {
+                        mpn,
+                        mfg: mfr,
+                        serial,
+                        mfg_rev: rev,
+                    })),
+                    Err(err) => {
+                        ringbuf_entry_root!(crate::Log::PmbusVpdError {
+                            dev: *component,
+                            err,
+                        });
+                        let rsp = match err {
+                            PmbusVpdError::BufferTooSmall { .. } => {
+                                VpdReadError::BadRead
+                            }
+                            PmbusVpdError::InvalidStr { .. } => {
+                                VpdReadError::InvalidContents
+                            }
+                            PmbusVpdError::I2c { .. } => VpdReadError::I2cError,
+                        };
+                        ComponentDetails::Vpd(Vpd::Err(rsp))
+                    }
+                }
+            }
+        }
     }
 
     pub(crate) fn device_description(
@@ -114,6 +209,9 @@ impl Inventory {
         if !device.sensors.is_empty() {
             capabilities |= DeviceCapabilities::HAS_MEASUREMENT_CHANNELS;
         }
+        if device.fruid.is_some() {
+            capabilities |= DeviceCapabilities::HAS_VPD;
+        }
         DeviceDescription {
             component: SpComponent { id: device.id },
             device: device.device,
@@ -180,6 +278,69 @@ impl TryFrom<&'_ SpComponent> for Index {
     }
 }
 
+/// Free function to read a nested barcode, translating errors appropriately
+fn read_one_barcode(
+    dev: I2cDevice,
+    path: &[([u8; 4], usize)],
+) -> Result<oxide_barcode::VpdIdentity, VpdReadError> {
+    let eeprom = At24Csw080::new(dev);
+    let mut barcode = [0; 32];
+    match drv_oxide_vpd::read_config_nested_from_into(
+        eeprom,
+        path,
+        &mut barcode,
+    ) {
+        Ok(n) => {
+            // extract barcode!
+            let identity = oxide_barcode::VpdIdentity::parse(&barcode[..n])
+                .map_err(|_| VpdReadError::InvalidContents)?;
+            Ok(identity)
+        }
+        Err(
+            drv_oxide_vpd::VpdError::NoRootChunk
+            | drv_oxide_vpd::VpdError::NoSuchChunk(_)
+            | drv_oxide_vpd::VpdError::InvalidChunkSize,
+        ) => Err(VpdReadError::InvalidContents),
+        Err(
+            drv_oxide_vpd::VpdError::ErrorOnBegin(err)
+            | drv_oxide_vpd::VpdError::ErrorOnRead(err)
+            | drv_oxide_vpd::VpdError::ErrorOnNext(err)
+            | drv_oxide_vpd::VpdError::InvalidChecksum(err),
+        ) => match err {
+            // If the underlying error is an I2C error, indicate that.
+            tlvc::TlvcReadError::User(
+                drv_i2c_devices::at24csw080::Error::I2cError(e),
+            ) => Err(i2c_vpd_error(e)),
+            // Other user errors indicate we tried to read a bad address or
+            // similar.
+            tlvc::TlvcReadError::User(_) => Err(VpdReadError::BadRead),
+            // Otherwise, indicate that the contents are invalid TLV-c.
+            _ => Err(VpdReadError::InvalidContents),
+        },
+    }
+}
+
+/// Read FRUID data from a TMP117 temperature sensor.
+fn read_tmp117_fruid(dev: I2cDevice) -> Result<Tmp117Vpd, VpdReadError> {
+    let id: u16 = dev.read_reg(0x0Fu8).map_err(i2c_vpd_error)?;
+    let eeprom1: u16 = dev.read_reg(0x05u8).map_err(i2c_vpd_error)?;
+    let eeprom2: u16 = dev.read_reg(0x06u8).map_err(i2c_vpd_error)?;
+    let eeprom3: u16 = dev.read_reg(0x08u8).map_err(i2c_vpd_error)?;
+    Ok(Tmp117Vpd {
+        id,
+        eeprom1,
+        eeprom2,
+        eeprom3,
+    })
+}
+
+fn i2c_vpd_error(e: i2c::ResponseCode) -> VpdReadError {
+    match e {
+        i2c::ResponseCode::NoDevice => VpdReadError::DeviceNotPresent,
+        _ => VpdReadError::I2cError,
+    }
+}
+
 use devices_with_static_validation::OUR_DEVICES;
 // We tag this with module `#[allow(dead_code)]` to prevent warnings about the
 // contents of this module not being used; it contains constants used in static
@@ -270,6 +431,7 @@ mod devices_with_static_validation {
             // Fine to assume this is always present; if it isn't, we can't respond
             // to MGS messages anyway!
             presence: DevicePresence::Present,
+            fruid: None,
         },
         #[cfg(any(
             feature = "gimlet",
diff --git a/task/control-plane-agent/src/main.rs b/task/control-plane-agent/src/main.rs
index c9c4eb823e..44a3f381dd 100644
--- a/task/control-plane-agent/src/main.rs
+++ b/task/control-plane-agent/src/main.rs
@@ -81,6 +81,11 @@ enum Log {
     ReadRotPage,
     IpcRequest(#[count(children)] IpcRequest),
     VpdLockStatus,
+    PmbusVpdError {
+        dev: SpComponent,
+        #[count(children)]
+        err: drv_i2c_devices::PmbusVpdError,
+    },
 }
 
 // This enum does not define the actual MGS protocol - it is only used in the
diff --git a/task/control-plane-agent/src/mgs_common.rs b/task/control-plane-agent/src/mgs_common.rs
index 1ef23dc778..3c7067f66d 100644
--- a/task/control-plane-agent/src/mgs_common.rs
+++ b/task/control-plane-agent/src/mgs_common.rs
@@ -57,7 +57,7 @@ pub(crate) struct MgsCommon {
     dump_state: DumpState,
 
     reset_component_requested: Option<SpComponent>,
-    inventory: Inventory,
+    pub inventory: Inventory,
     base_mac_address: MacAddress,
     packrat: Packrat,
     sprot: SpRot,
@@ -71,7 +71,6 @@ impl MgsCommon {
             sp_update: SpUpdate::new(),
             rot_update: RotUpdate::new(),
             dump_state: DumpState::new(),
-
             reset_component_requested: None,
             inventory: Inventory::new(),
             base_mac_address,
diff --git a/task/control-plane-agent/src/mgs_compute_sled.rs b/task/control-plane-agent/src/mgs_compute_sled.rs
index 25d59bf969..a10b8cad98 100644
--- a/task/control-plane-agent/src/mgs_compute_sled.rs
+++ b/task/control-plane-agent/src/mgs_compute_sled.rs
@@ -913,8 +913,8 @@ impl SpHandler for MgsHandler {
         &mut self,
         component: SpComponent,
         index: BoundsChecked,
-    ) -> ComponentDetails {
-        self.common.inventory().component_details(&component, index)
+    ) -> ComponentDetails<&str> {
+        self.common.inventory.component_details(&component, index)
     }
 
     fn component_get_active_slot(
diff --git a/task/control-plane-agent/src/mgs_psc.rs b/task/control-plane-agent/src/mgs_psc.rs
index fdf45de984..8f512aaaf5 100644
--- a/task/control-plane-agent/src/mgs_psc.rs
+++ b/task/control-plane-agent/src/mgs_psc.rs
@@ -451,8 +451,8 @@ impl SpHandler for MgsHandler {
         &mut self,
         component: SpComponent,
         index: BoundsChecked,
-    ) -> ComponentDetails {
-        self.common.inventory().component_details(&component, index)
+    ) -> ComponentDetails<&str> {
+        self.common.inventory.component_details(&component, index)
     }
 
     fn component_get_active_slot(
diff --git a/task/control-plane-agent/src/mgs_sidecar.rs b/task/control-plane-agent/src/mgs_sidecar.rs
index 4a5e14ed64..f5b315f678 100644
--- a/task/control-plane-agent/src/mgs_sidecar.rs
+++ b/task/control-plane-agent/src/mgs_sidecar.rs
@@ -923,12 +923,12 @@ impl SpHandler for MgsHandler {
         &mut self,
         component: SpComponent,
         index: BoundsChecked,
-    ) -> ComponentDetails {
+    ) -> ComponentDetails<&str> {
         match component {
             SpComponent::MONORAIL => ComponentDetails::PortStatus(
                 monorail_port_status::port_status(&self.monorail, index),
             ),
-            _ => self.common.inventory().component_details(&component, index),
+            _ => self.common.inventory.component_details(&component, index),
         }
     }
 
diff --git a/task/validate-api/Cargo.toml b/task/validate-api/Cargo.toml
index a11dddbaf5..07714de23a 100644
--- a/task/validate-api/Cargo.toml
+++ b/task/validate-api/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.1.0"
 edition = "2021"
 
 [features]
-
+fruid = ["drv-i2c-devices"]
 
 [dependencies]
 idol-runtime.workspace = true
@@ -17,6 +17,7 @@ serde.workspace = true
 counters = { path = "../../lib/counters" }
 derive-idol-err = { path = "../../lib/derive-idol-err"  }
 drv-i2c-api = { path = "../../drv/i2c-api" }
+drv-i2c-devices = { path = "../../drv/i2c-devices", optional = true }
 task-sensor-api = { path = "../sensor-api" }
 userlib = { path = "../../sys/userlib" }
 
diff --git a/task/validate-api/build.rs b/task/validate-api/build.rs
index 869ef1c4dc..254b7175f6 100644
--- a/task/validate-api/build.rs
+++ b/task/validate-api/build.rs
@@ -11,6 +11,13 @@ fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
         "../../idl/validate.idol",
         "client_stub.rs",
     )?;
+
+    #[cfg(feature = "fruid")]
+    if let Err(e) = build_i2c::codegen(build_i2c::Disposition::Devices) {
+        println!("cargo::error=failed to generate I2C devices: {e}");
+        std::process::exit(1);
+    }
+
     Ok(())
 }
 
@@ -50,6 +57,8 @@ fn write_pub_device_descriptions() -> anyhow::Result<()> {
     let mut missing_ids = 0;
     let mut duplicate_ids = 0;
     let mut ids_too_long = 0;
+    #[cfg(feature = "fruid")]
+    let mut bad_fruids = 0;
     //
     // The DEVICE_INDICES_BY_SORTED_ID array is used to look up indices by ID
     // using a binary search, so it must be sorted by ID. This map is used to
@@ -62,7 +71,8 @@ fn write_pub_device_descriptions() -> anyhow::Result<()> {
         writeln!(file, "    DeviceDescription {{")?;
         writeln!(file, "        device: {:?},", dev.device)?;
         writeln!(file, "        description: {:?},", dev.description)?;
-        if let Some(id) = dev.device_id {
+        if let Some(id) = dev.device_id.as_ref() {
+            let id = id.to_component_id();
             if let Ok(component) = SpComponent::try_from(id.as_ref()) {
                 write!(file, "        id: {:?},", component.id)?;
                 if id2idx.insert(component.id, idx).is_some() {
@@ -92,6 +102,50 @@ fn write_pub_device_descriptions() -> anyhow::Result<()> {
             writeln!(file, "            }},")?;
         }
         writeln!(file, "        ],")?;
+        #[cfg(feature = "fruid")]
+        {
+            let mode = match (dev.fruid, dev.device.as_ref()) {
+                (Some(build_i2c::FruidMode::SingleBarcode), "at24csw080") => {
+                    Some("FruidMode::At24Csw080Barcode")
+                }
+                (Some(build_i2c::FruidMode::NestedBarcode), "at24csw080") => {
+                    Some("FruidMode::At24Csw080NestedBarcode")
+                }
+                (None, "tmp117") => Some("FruidMode::Tmp117"),
+                (Some(build_i2c::FruidMode::Pmbus), _) => {
+                    // TODO(elize): this should check that the device is a PMBus
+                    // device and error if it isn't...
+                    Some("FruidMode::Pmbus")
+                }
+                (Some(mode), device) => {
+                    println!("cargo::error=FRUID mode {mode:?} not supported for {device}");
+                    bad_fruids += 1;
+                    None
+                }
+                (None, _) => None,
+            };
+            match (mode, dev.device_id.as_ref()) {
+                (Some(mode), Some(id)) => {
+                    let devname = format!(
+                        "i2c_config::devices::{}_{} as fn(_) -> _",
+                        &dev.device,
+                        id.to_lower_ident()
+                    );
+                    writeln!(file, "        fruid: Some({mode}({devname})),")?;
+                }
+                (None, _) => {
+                    writeln!(file, "        fruid: None,")?;
+                }
+                (Some(mode), None) => {
+                    println!(
+                        "cargo::error=devices with a FRUID mode must have \
+                         refdes, but device {idx} (mode: {mode:?}) does not\
+                        have one",
+                    );
+                    bad_fruids += 1;
+                }
+            }
+        }
         writeln!(file, "    }},")?;
     }
 
@@ -127,5 +181,11 @@ fn write_pub_device_descriptions() -> anyhow::Result<()> {
         SpComponent::MAX_ID_LENGTH,
     );
 
+    #[cfg(feature = "fruid")]
+    anyhow::ensure!(
+        bad_fruids == 0,
+        "{bad_fruids} devices have invalid FRUID configs!"
+    );
+
     Ok(())
 }
diff --git a/task/validate-api/src/lib.rs b/task/validate-api/src/lib.rs
index 3884406f07..fd8b5214ae 100644
--- a/task/validate-api/src/lib.rs
+++ b/task/validate-api/src/lib.rs
@@ -7,6 +7,8 @@
 #![no_std]
 
 use derive_idol_err::IdolError;
+#[cfg(feature = "fruid")]
+use drv_i2c_api::I2cDevice;
 use drv_i2c_api::ResponseCode;
 use userlib::*;
 use zerocopy::{Immutable, IntoBytes, KnownLayout};
@@ -69,12 +71,38 @@ pub struct SensorDescription {
     pub id: SensorId,
 }
 
-#[derive(Copy, Clone, Debug, Eq, PartialEq)]
+#[derive(Copy, Clone, Debug)]
 pub struct DeviceDescription {
     pub device: &'static str,
     pub description: &'static str,
     pub sensors: &'static [SensorDescription],
     pub id: [u8; MAX_ID_LENGTH],
+    #[cfg(feature = "fruid")]
+    pub fruid: Option<FruidMode>,
+}
+
+#[cfg(feature = "fruid")]
+#[derive(Copy, Clone)]
+pub enum FruidMode {
+    At24Csw080Barcode(fn(TaskId) -> I2cDevice),
+    At24Csw080Nested(fn(TaskId) -> I2cDevice),
+    Tmp117(fn(TaskId) -> I2cDevice),
+    Pmbus(fn(TaskId) -> I2cDevice),
+}
+
+#[cfg(feature = "fruid")]
+impl core::fmt::Debug for FruidMode {
+    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
+        match self {
+            FruidMode::At24Csw080Barcode(_) => write!(f, "At24Csw080Barcode"),
+            FruidMode::At24Csw080Nested(_) => write!(f, "At24Csw080Nested"),
+            FruidMode::Tmp117(_) => write!(f, "Tmp117"),
+            FruidMode::Pmbus(_) => write!(f, "Pmbus"),
+        }
+    }
 }
 
 include!(concat!(env!("OUT_DIR"), "/device_descriptions.rs"));
+
+#[cfg(feature = "fruid")]
+include!(concat!(env!("OUT_DIR"), "/i2c_config.rs"));