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| author |   Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> | 2025-05-01 21:40:03 +0100 |
|---|---|---|
| committer |   Andi Shyti <andi@smida.it> | 2025-05-19 22:23:57 +0200 |
| commit | ba9e1b5254783528e10b45b1f0fb40e21f4ff88a (patch) | |
| tree | fff41396a6e0ce3f94cef3d0beab2aa5c8c03e3a /scripts/gdb/linux/utils.py | |
| parent | dt-bindings: i2c: dw: Add Sophgo SG2044 SoC I2C controller (diff) | |
| download | linux-rng-ba9e1b5254783528e10b45b1f0fb40e21f4ff88a.tar.xz linux-rng-ba9e1b5254783528e10b45b1f0fb40e21f4ff88a.zip | |
i2c: riic: Implement bus recovery
Implement I2C bus recovery support for the RIIC controller by making use
of software-controlled SCL and SDA line manipulation. The controller allows
forcing SCL and SDA levels through control bits, which enables generation
of manual clock pulses and a stop condition to free a stuck bus.
This implementation wires up the bus recovery mechanism using
i2c_generic_scl_recovery and provides get/set operations for SCL and SDA.
This allows the RIIC driver to recover from bus hang scenarios where SDA
is held low by a slave.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Fabrizio Castro <fabrizio.castro.jz@renesas.com>
Link: https://lore.kernel.org/r/20250501204003.141134-1-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
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