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rch/arm/src/lpc17xx_40xx/lpc17_40_i2c.c: Respect the I2C_M_NOSTART flag. Sending a restart condition when not requested will break other drivers that depend on this behavior.

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This commit is contained in:
Augusto Fraga Giachero 2019-09-17 16:14:58 -06:00 committed by Gregory Nutt
parent a8a59df260
commit 08b596d26d
1 changed files with 19 additions and 2 deletions
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21
arch/arm/src/lpc17xx_40xx/lpc17_40_i2c.c
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@ -221,7 +221,7 @@ static int lpc17_40_i2c_start(struct lpc17_40_i2cdev_s *priv)
/* Get the total transaction length and the minimum frequency */
for(i = 0; i < priv->nmsg; i++)
for (i = 0; i < priv->nmsg; i++)
{
total_len += priv->msgs[i].length;
if (priv->msgs[i].frequency < freq)
@ -342,7 +342,24 @@ static void lpc17_40_stopnext(struct lpc17_40_i2cdev_s *priv)
if (priv->nmsg > 0)
{
priv->msgs++;
putreg32(I2C_CONSET_STA, priv->base + LPC17_40_I2C_CONSET_OFFSET);
/* Check if a restart condition should be issued */
if (priv->msgs->flags & I2C_M_NOSTART)
{
priv->wrcnt = 0;
/* Starts transmitting the data buffer of the next message without
* issuing a restart.
*/
putreg32(priv->msgs->buffer[priv->wrcnt],
priv->base + LPC17_40_I2C_DAT_OFFSET);
}
else
{
putreg32(I2C_CONSET_STA, priv->base + LPC17_40_I2C_CONSET_OFFSET);
}
}
else
{