i2c: rcar: ensure Gen3+ reset does not disturb local targets

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R-Car Gen3+ needs a reset before every controller transfer. That erases
configuration of a potentially in parallel running local target
instance. To avoid this disruption, avoid controller transfers if a
local target is running. Also, disable SMBusHostNotify because it
requires being a controller and local target at the same time.

Fixes: 3b770017b0 ("i2c: rcar: handle RXDMA HW behaviour on Gen3")
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>

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Wolfram Sang 2024-07-11 10:30:44 +02:00 • committed by Andi Shyti

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commit ea5ea84c9d

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drivers/i2c/busses/i2c-rcar.c

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