add support for PSU firmware update

Cargo.toml

@@ -31,6 +31,7 @@ path = "lib/counters"
 
 [workspace.dependencies]
 anyhow = { version = "1.0.31", default-features = false, features = ["std"] }
+array-init = { version = "2.1.0" }
 arrayvec = { version = "0.7.4", default-features = false }
 atty = { version = "0.2", default-features = false }
 bitfield = { version = "0.13", default-features = false }
@@ -132,7 +133,7 @@ idol = { git = "https://github.com/oxidecomputer/idolatry.git", default-features
 idol-runtime = { git = "https://github.com/oxidecomputer/idolatry.git", default-features = false }
 lpc55_sign = { git = "https://github.com/oxidecomputer/lpc55_support", default-features = false }
 ordered-toml = { git = "https://github.com/oxidecomputer/ordered-toml", default-features = false }
-pmbus = { git = "https://github.com/oxidecomputer/pmbus", default-features = false }
+pmbus = { git = "https://github.com/oxidecomputer/pmbus", branch = "mwocp", default-features = false }
 salty = { version = "0.3", default-features = false }
 spd = { git = "https://github.com/oxidecomputer/spd", default-features = false }
 tlvc = { git = "https://github.com/oxidecomputer/tlvc", default-features = false, version = "0.3.1" }

app/psc/base.toml

@@ -6,7 +6,7 @@ fwid = true
 
 [kernel]
 name = "psc"
-requires = {flash = 32868, ram = 5216}
+requires = {flash = 32868, ram = 6000}
 features = ["dump"]
 
 [caboose]
@@ -298,6 +298,13 @@ max-sizes = {flash = 16384, ram = 2048 }
 start = true
 task-slots = ["i2c_driver", "sensor"]
 
+[tasks.psu_update]
+name = "drv-psc-psu-update"
+priority = 4
+max-sizes = {flash = 65536, ram = 8192 }
+start = true
+task-slots = ["i2c_driver"]
+
 [tasks.dump_agent]
 name = "task-dump-agent"
 priority = 5