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Commit d89667b1 authored by Wolfram Sang's avatar Wolfram Sang Committed by Wolfram Sang
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i2c: rcar: don't issue stop when HW does it automatically 



The manual says (55.4.8.6) that HW does automatically send STOP after
NACK was received. My measuerments confirm that.

Signed-off-by: default avatarWolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: default avatarWolfram Sang <wsa@the-dreams.de>
parent cc21d0b4

drivers/i2c/busses/i2c-rcar.c

+2 −2
Original line number Diff line number Diff line
@@ -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;