From: Wolfram Sang wsa+renesas@sang-engineering.com
commit d89667b14f9d13b684287f6189ca209af5feee43 upstream.
The manual says (55.4.8.6) that HW does automatically send STOP after NACK was received. My measuerments confirm that.
Signed-off-by: Wolfram Sang wsa+renesas@sang-engineering.com Signed-off-by: Wolfram Sang wsa@the-dreams.de [fabrizio: cherry-pick to 4.4] Signed-off-by: Fabrizio Castro fabrizio.castro@bp.renesas.com Reviewed-by: Biju Das biju.das@bp.renesas.com --- drivers/i2c/busses/i2c-rcar.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c index 44662e2..6f23b97 100644 --- a/drivers/i2c/busses/i2c-rcar.c +++ b/drivers/i2c/busses/i2c-rcar.c @@ -455,8 +455,8 @@ static irqreturn_t rcar_i2c_irq(int irq, void *ptr)
/* Nack */ if (msr & MNR) { - /* go to stop phase */ - rcar_i2c_write(priv, ICMCR, RCAR_BUS_PHASE_STOP); + /* HW automatically sends STOP after received NACK */ + rcar_i2c_write(priv, ICMCR, RCAR_BUS_PHASE_DATA); rcar_i2c_write(priv, ICMIER, RCAR_IRQ_STOP); rcar_i2c_flags_set(priv, ID_NACK); goto out;