From 606fd2788b0fce6f5138078a4fbe8979ecba5697 Mon Sep 17 00:00:00 2001 From: Jean Delvare Date: Wed, 21 Jun 2017 09:24:02 +0200 Subject: [PATCH] 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: Jean Delvare Tested-by: Wolfram Sang Signed-off-by: Wolfram Sang --- drivers/i2c/algos/i2c-algo-bit.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/drivers/i2c/algos/i2c-algo-bit.c b/drivers/i2c/algos/i2c-algo-bit.c index a8e89df..1147bdd 100644 --- a/drivers/i2c/algos/i2c-algo-bit.c +++ b/drivers/i2c/algos/i2c-algo-bit.c @@ -553,9 +553,16 @@ 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"); - i2c_repstart(adap); + 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) { -- 2.7.4