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 <[email protected]> Tested-by: Wolfram Sang <[email protected]> --- Changes since v1: * Simplify logic drivers/i2c/algos/i2c-algo-bit.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) --- linux-4.11.orig/drivers/i2c/algos/i2c-algo-bit.c 2017-06-19 09:57:17.949074198 +0200 +++ linux-4.11/drivers/i2c/algos/i2c-algo-bit.c 2017-06-21 09:07:07.910049960 +0200 @@ -553,9 +553,18 @@ static int bit_xfer(struct i2c_adapter * 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 condition\n"); + i2c_stop(adap); + bit_dbg(3, &i2c_adap->dev, + "emitting start condition\n"); + 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) { -- Jean Delvare SUSE L3 Support
