On Wed, Sep 03, 2014 at 01:52:07PM +0800, Haibo Chen wrote: > According to the i.mx spec, for multimaster mode, if I2C is > enabled when the bus is busy and asserts start, hardware inhibits > the transmission, clears MSTA without signaling a stop, generate > an interrupt, and set I2C_I2SR[IAL] to indicate a failed attempt > to engage the bus, which means arbitration lost. In this case, > we should first test I2C_I2SR[IAL], and clear this bit if it is > set, and then I2C controller default to slave receive mode. > > This patch check the IAL bit every time before an I2c transmission. > if IAL is set, clear it and make I2C controller to default mode. > > Signed-off-by: Haibo Chen <haibo.chen@xxxxxxxxxxxxx> > Acked-by: Fugang Duan <B38611@xxxxxxxxxxxxx> > --- > Changes for V2: > -Use 'EAGAIN' instead of 'EIO' for arbitration lost > -Modify the comment style > > drivers/i2c/busses/i2c-imx.c | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c > index 613069b..ceff87c 100644 Applied to for-next, thanks!
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