arch/arm64/src/imx9/imx9_lpi2c.c: Clear NACK properly on last RX byte

Signed-off-by: Jukka Laitinen <[email protected]>
apache · Nov 20, 2024 · 07f936a · 07f936a
1 parent 76a67fd
commit 07f936a
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/arch/arm64/src/imx9/imx9_lpi2c.c b/arch/arm64/src/imx9/imx9_lpi2c.c
@@ -1485,9 +1485,10 @@ static int imx9_lpi2c_isr_process(struct imx9_lpi2c_priv_s *priv)
 
   /* Ignore NACK on RX last byte - this is normal */
 
-  if ((status & LPI2C_MSR_NDF) != 0 && (priv->flags & I2C_M_READ) != 0 &&
-      priv->dcnt == 1)
+  if ((status & (LPI2C_MSR_RDF | LPI2C_MSR_NDF)) ==
+      (LPI2C_MSR_RDF | LPI2C_MSR_NDF) && priv->dcnt == 1)
     {
+      imx9_lpi2c_putreg(priv, IMX9_LPI2C_MSR_OFFSET, LPI2C_MSR_NDF);
       status &= ~LPI2C_MSR_NDF;
     }