Avoid setting the frequency if current frequency is the same

apache · Jul 19, 2020 · 2905542 · 2905542
1 parent af0690a
commit 2905542
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/arch/xtensa/src/esp32/esp32_spi.c b/arch/xtensa/src/esp32/esp32_spi.c
@@ -438,6 +438,13 @@ static uint32_t esp32_spi_setfrequency(FAR struct spi_dev_s *dev,
   FAR struct esp32_spi_priv_s *priv = (FAR struct esp32_spi_priv_s *)dev;
   const uint32_t duty_cycle = 128;
 
+  if (priv->frequency == frequency)
+    {
+      /* We are already at this frequency. Return the actual. */
+
+      return priv->actual;
+    }
+
   if (frequency > ((APB_CLK_FREQ / 4) * 3))
     {
       reg_val = SPI_CLK_EQU_SYSCLK_M;