[PATCH net v2 2/2] net: ti: icssg-prueth: Fix clearing of IEP_CMP_CFG registers during iep_init

[Roger Quadros]

On 28/11/2024 14:29, Meghana Malladi wrote:
> When ICSSG interfaces are brought down and brought up again, the
> pru cores are shut down and booted again, flushing out all the memories
> and start again in a clean state. Hence it is expected that the
> IEP_CMP_CFG register needs to be flushed during iep_init() to ensure
> that the existing residual configuration doesn't cause any unusual
> behavior. If the register is not cleared, existing IEP_CMP_CFG set for
> CMP1 will result in SYNC0_OUT signal based on the SYNC_OUT register values.
> 
> After bringing the interface up, calling PPS enable doesn't work as
> the driver believes PPS is already enabled, (iep->pps_enabled is not
> cleared during interface bring down) and driver will just return true
> even though there is no signal. Fix this by disabling pps and perout.
> 
> Fixes: c1e0230eeaab ("net: ti: icss-iep: Add IEP driver")
> Signed-off-by: Meghana Malladi <m-malladi at ti.com>

Reviewed-by: Roger Quadros <rogerq at kernel.org>