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However, manual emission of NACK/ACK is needed for hot join or controller request events. Add an event type check to send out NACK if the event is not an IBI. Signed-off-by: Frank Li --- drivers/i3c/master/svc-i3c-master.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/i3c/master/svc-i3c-master.c b/drivers/i3c/master/svc-i= 3c-master.c index 5d19251238ff8..36e01d0430747 100644 --- a/drivers/i3c/master/svc-i3c-master.c +++ b/drivers/i3c/master/svc-i3c-master.c @@ -1113,7 +1113,15 @@ static int svc_i3c_master_xfer(struct svc_i3c_master= *master, * start. */ if (SVC_I3C_MSTATUS_IBIWON(reg)) { + int ibitype =3D SVC_I3C_MSTATUS_IBITYPE(reg); + writel(SVC_I3C_MINT_IBIWON, master->regs + SVC_I3C_MSTATUS); + + /* Hardware can't auto emit NACK for hot join and master request */ + if (ibitype =3D=3D SVC_I3C_MSTATUS_IBITYPE_HOT_JOIN || + ibitype =3D=3D SVC_I3C_MSTATUS_IBITYPE_MASTER_REQUEST) + svc_i3c_master_nack_ibi(master); + continue; } =20 --=20 2.34.1