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imxrt:lpi2c Fix interrupt storm on failed write.

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The SDF was not acked if ther was an error
   on the last write.
This commit is contained in:
David Sidrane 2019-12-12 16:29:42 -08:00
parent 0050ba9ac7
commit 3dcd238d5e
1 changed files with 8 additions and 2 deletions
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10
arch/arm/src/imxrt/imxrt_lpi2c.c
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@ -1245,11 +1245,17 @@ static int imxrt_lpi2c_isr_process(struct imxrt_lpi2c_priv_s *priv)
imxrt_lpi2c_tracenew(priv, status); imxrt_lpi2c_tracenew(priv, status);
/* Continue with either sending or reading data */ /* After an error we can get an SDF */
if (priv->intstate == INTSTATE_DONE && (status & LPI2C_MSR_SDF) != 0)
{
imxrt_lpi2c_traceevent(priv, I2CEVENT_STOP, 0);
imxrt_lpi2c_putreg(priv, IMXRT_LPI2C_MSR_OFFSET, LPI2C_MSR_SDF);
}
/* Check if there is more bytes to send */ /* Check if there is more bytes to send */
if (((priv->flags & I2C_M_READ) == 0) && (status & LPI2C_MSR_TDF) != 0) else if (((priv->flags & I2C_M_READ) == 0) && (status & LPI2C_MSR_TDF) != 0)
{ {
if (priv->dcnt > 0) if (priv->dcnt > 0)
{ {