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Commit 606fd278 authored by Jean Delvare's avatar Jean Delvare Committed by Wolfram Sang
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i2c: algo-bit: add support for I2C_M_STOP 



Support for enforced STOPs will allow us to use SCCB compatible devices.

Based on a preliminary patch by Wolfram Sang.

Signed-off-by: default avatarJean Delvare <jdelvare@suse.de>
Tested-by: default avatarWolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: default avatarWolfram Sang <wsa@the-dreams.de>
parent 413dfbbf

drivers/i2c/algos/i2c-algo-bit.c

+10 −3
Original line number Diff line number Diff line
@@ -553,10 +553,17 @@ static int bit_xfer(struct i2c_adapter *i2c_adap, 
		nak_ok = pmsg->flags & I2C_M_IGNORE_NAK;

		if (!(pmsg->flags & I2C_M_NOSTART)) {

			if (i) {

				bit_dbg(3, &i2c_adap->dev, "emitting "

					"repeated start condition\n");

				if (msgs[i - 1].flags & I2C_M_STOP) {

					bit_dbg(3, &i2c_adap->dev,

						"emitting enforced stop/start condition\n");

					i2c_stop(adap);

					i2c_start(adap);

				} else {

					bit_dbg(3, &i2c_adap->dev,

						"emitting repeated start condition\n");

					i2c_repstart(adap);

				}

			}

			ret = bit_doAddress(i2c_adap, pmsg);

			if ((ret != 0) && !nak_ok) {

				bit_dbg(1, &i2c_adap->dev, "NAK from "