arch: cxd56xx: Improve i2c initialize function

During I2C communication between non-Spresense devices is performed, the I2C bus may freeze after initialization of the Spresense I2C. As a workaround, switch the pin mode to I2C at the end of the i2c initialization function. Signed-off-by: SPRESENSE <[email protected]>
apache · Feb 25, 2025 · 96de2e2 · 96de2e2
1 parent d521b92
commit 96de2e2
Showing 1 changed file with 4 additions and 4 deletions.
diff --git a/arch/arm/src/cxd56xx/cxd56_i2c.c b/arch/arm/src/cxd56xx/cxd56_i2c.c
@@ -1140,10 +1140,6 @@ struct i2c_master_s *cxd56_i2cbus_initialize(int port)
 
   cxd56_i2c_setfrequency(priv, I2C_DEFAULT_FREQUENCY);
 
-  /* Configure pin */
-
-  cxd56_i2c_pincontrol(port, true);
-
   /* Attach Interrupt Handler */
 
   irq_attach(priv->irqid, cxd56_i2c_interrupt, priv);
@@ -1164,6 +1160,10 @@ struct i2c_master_s *cxd56_i2cbus_initialize(int port)
 
   cxd56_i2c_clock_gate_enable(port);
 
+  /* Configure pin */
+
+  cxd56_i2c_pincontrol(port, true);
+
   nxmutex_unlock(&priv->lock);
   return &priv->dev;
 }