v2n-brd-i2c-bringup

Bring-up diagnostic for the V2N SoM's BRD_I2C management bus (Renesas RIIC8). Scans the bus, distinguishes a bus-level electrical fault (line held low / missing pull-ups / wrong pinmux) from per-device failures, then probes every populated IC read-only and prints a PASS/FAIL/SKIP table.

Source: examples/v2n/v2n-brd-i2c-bringup/.

Probed devices

Device	7-bit address	Notes
DA9292 (secondary PMIC)	0x1E
ACT88760 (primary PMIC)	0x25 + 0x26	Two-slave model: ADD1 + ADD2
OPTIGA Trust M	0x30
TMP112	0x40	Per SoM metadata — the example also tries the datasheet 0x48..0x4B range and reports any discrepancy instead of hiding it
TPS628640	0x4D	Assembly option → SKIP when absent
RV-3028-C7 (RTC)	0x52
5L35023B (clock generator)	0x68
GD32G553 supervisor	0x70	Via its I²C bridge transport

The example never writes a PMIC voltage, enable, or control register — all probes are read-only, safe to run on any unit.

See also

• Chip catalogue — the drivers behind each probed IC
• I²C Scanner — the generic cross-family bus scan